Merge topic 'ghs_custom'

2bae6a1346 GHS: Update tests and notes
3b415c60c1 GHS: Update ExternalProject for GHS tools
83c47ef5b8 GHS: Update project layout to accommodate gbuild inconsistencies
5d2e1404bd GHS: Update project layout to build targets correctly
b6bfa7eeb2 GHS: Support add_dependencies() command
39ee9718d9 GHS: Support add_custom_target() command
8d3dad9a76 GHS: Support add_custom_command( OUTPUT ) signature
37acc9e229 GHS: Update custom command build events

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Narendhar Manimohan <narendhar15@gmail.com>
Merge-request: !3119

30 files changed, 1105 insertions, 234 deletions

diff --git a/Help/release/dev/ghs-custom-commands.rst b/Help/release/dev/ghs-custom-commands.rst
new file mode 100644
index 0000000..a29ef88
--- /dev/null
+++ b/Help/release/dev/ghs-custom-commands.rst
@@ -0,0 +1,5 @@
+ghs_custom_commands
+-------------------
+
+* The :generator:`Green Hills MULTI` generator now supports
+  :command:`add_custom_command` and :command:`add_custom_target`
diff --git a/Modules/ExternalProject.cmake b/Modules/ExternalProject.cmake
index 8f1e194..20b37d2 100644
--- a/Modules/ExternalProject.cmake
+++ b/Modules/ExternalProject.cmake
@@ -422,6 +422,10 @@ External Project Definition
       different behavior depending on whether the build starts from a fresh
       build directory or re-uses previous build contents.
 
+      If the CMake generator is the ``Green Hills MULTI`` and not overridden then
+      the orginal projects settings for the GHS toolset and target system
+      customization cache variables are propagated into the external project.
+
     ``SOURCE_SUBDIR <dir>``
       When no ``CONFIGURE_COMMAND`` option is specified, the configure step
       assumes the external project has a ``CMakeLists.txt`` file at the top of
@@ -2850,18 +2854,6 @@ function(_ep_extract_configure_command var name)
       set(has_cmake_cache_default_args 1)
     endif()
 
-    if(has_cmake_cache_args OR has_cmake_cache_default_args)
-      set(_ep_cache_args_script "<TMP_DIR>/${name}-cache-$<CONFIG>.cmake")
-      if(has_cmake_cache_args)
-        _ep_command_line_to_initial_cache(script_initial_cache_force "${cmake_cache_args}" 1)
-      endif()
-      if(has_cmake_cache_default_args)
-        _ep_command_line_to_initial_cache(script_initial_cache_default "${cmake_cache_default_args}" 0)
-      endif()
-      _ep_write_initial_cache(${name} "${_ep_cache_args_script}" "${script_initial_cache_force}${script_initial_cache_default}")
-      list(APPEND cmd "-C${_ep_cache_args_script}")
-    endif()
-
     get_target_property(cmake_generator ${name} _EP_CMAKE_GENERATOR)
     get_target_property(cmake_generator_instance ${name} _EP_CMAKE_GENERATOR_INSTANCE)
     get_target_property(cmake_generator_platform ${name} _EP_CMAKE_GENERATOR_PLATFORM)
@@ -2882,6 +2874,16 @@ function(_ep_extract_configure_command var name)
         list(APPEND cmd "-G${CMAKE_EXTRA_GENERATOR} - ${CMAKE_GENERATOR}")
       else()
         list(APPEND cmd "-G${CMAKE_GENERATOR}")
+        if("${CMAKE_GENERATOR}" MATCHES "Green Hills MULTI")
+          set(has_cmake_cache_default_args 1)
+          set(cmake_cache_default_args ${cmake_cache_default_args}
+            "-DGHS_TARGET_PLATFORM:STRING=${GHS_TARGET_PLATFORM}"
+            "-DGHS_PRIMARY_TARGET:STRING=${GHS_PRIMARY_TARGET}"
+            "-DGHS_TOOLSET_ROOT:STRING=${GHS_TOOLSET_ROOT}"
+            "-DGHS_OS_ROOT:STRING=${GHS_OS_ROOT}"
+            "-DGHS_OS_DIR:STRING=${GHS_OS_DIR}"
+            "-DGHS_BSP_NAME:STRING=${GHS_BSP_NAME}")
+        endif()
       endif()
       if(cmake_generator_platform)
         message(FATAL_ERROR "Option CMAKE_GENERATOR_PLATFORM not allowed without CMAKE_GENERATOR.")
@@ -2903,6 +2905,18 @@ function(_ep_extract_configure_command var name)
       endif()
     endif()
 
+    if(has_cmake_cache_args OR has_cmake_cache_default_args)
+      set(_ep_cache_args_script "<TMP_DIR>/${name}-cache-$<CONFIG>.cmake")
+      if(has_cmake_cache_args)
+        _ep_command_line_to_initial_cache(script_initial_cache_force "${cmake_cache_args}" 1)
+      endif()
+      if(has_cmake_cache_default_args)
+        _ep_command_line_to_initial_cache(script_initial_cache_default "${cmake_cache_default_args}" 0)
+      endif()
+      _ep_write_initial_cache(${name} "${_ep_cache_args_script}" "${script_initial_cache_force}${script_initial_cache_default}")
+      list(APPEND cmd "-C${_ep_cache_args_script}")
+    endif()
+
     list(APPEND cmd "<SOURCE_DIR><SOURCE_SUBDIR>")
   endif()
 
diff --git a/Source/cmGhsMultiGpj.cxx b/Source/cmGhsMultiGpj.cxx
index 8b69b51..da27971 100644
--- a/Source/cmGhsMultiGpj.cxx
+++ b/Source/cmGhsMultiGpj.cxx
@@ -9,7 +9,8 @@ static const char* GHS_TAG[] = { "[INTEGRITY Application]",
                                  "[Project]",
                                  "[Program]",
                                  "[Reference]",
-                                 "[Subproject]" };
+                                 "[Subproject]",
+                                 "[Custom Target]" };
 
 const char* GhsMultiGpj::GetGpjTag(Types gpjType)
 {
@@ -21,6 +22,7 @@ const char* GhsMultiGpj::GetGpjTag(Types gpjType)
     case PROGRAM:
     case REFERENCE:
     case SUBPROJECT:
+    case CUSTOM_TARGET:
       tag = GHS_TAG[gpjType];
       break;
     default:
diff --git a/Source/cmGhsMultiGpj.h b/Source/cmGhsMultiGpj.h
index 420eab1..e588150 100644
--- a/Source/cmGhsMultiGpj.h
+++ b/Source/cmGhsMultiGpj.h
@@ -16,7 +16,8 @@ public:
     PROJECT,
     PROGRAM,
     REFERENCE,
-    SUBPROJECT
+    SUBPROJECT,
+    CUSTOM_TARGET
   };
 
   static void WriteGpjTag(Types gpjType, std::ostream& fout);
diff --git a/Source/cmGhsMultiTargetGenerator.cxx b/Source/cmGhsMultiTargetGenerator.cxx
index 668bcbd..b80da72 100644
--- a/Source/cmGhsMultiTargetGenerator.cxx
+++ b/Source/cmGhsMultiTargetGenerator.cxx
@@ -3,7 +3,7 @@
 #include "cmGhsMultiTargetGenerator.h"
 
 #include "cmCustomCommand.h"
-#include "cmCustomCommandLines.h"
+#include "cmCustomCommandGenerator.h"
 #include "cmGeneratedFileStream.h"
 #include "cmGeneratorTarget.h"
 #include "cmGlobalGhsMultiGenerator.h"
@@ -11,17 +11,17 @@
 #include "cmLocalGenerator.h"
 #include "cmLocalGhsMultiGenerator.h"
 #include "cmMakefile.h"
+#include "cmOutputConverter.h"
 #include "cmSourceFile.h"
+#include "cmSourceFileLocation.h"
 #include "cmSourceGroup.h"
 #include "cmStateDirectory.h"
 #include "cmStateSnapshot.h"
 #include "cmStateTypes.h"
 #include "cmSystemTools.h"
 #include "cmTarget.h"
-#include "cmTargetDepend.h"
 
 #include <algorithm>
-#include <assert.h>
 #include <ostream>
 #include <set>
 #include <utility>
@@ -32,6 +32,11 @@ cmGhsMultiTargetGenerator::cmGhsMultiTargetGenerator(cmGeneratorTarget* target)
       static_cast<cmLocalGhsMultiGenerator*>(target->GetLocalGenerator()))
   , Makefile(target->Target->GetMakefile())
   , Name(target->GetName())
+#ifdef _WIN32
+  , CmdWindowsShell(true)
+#else
+  , CmdWindowsShell(false)
+#endif
 {
   // Store the configuration name that is being used
   if (const char* config = this->Makefile->GetDefinition("CMAKE_BUILD_TYPE")) {
@@ -85,10 +90,19 @@ void cmGhsMultiTargetGenerator::Generate()
       return;
     }
     case cmStateEnums::UTILITY: {
-      std::string msg = "add_custom_target(<name> ...) not supported: ";
-      msg += this->Name;
-      cmSystemTools::Message(msg);
-      return;
+      this->TargetNameReal = this->GeneratorTarget->GetName();
+      this->TagType = GhsMultiGpj::CUSTOM_TARGET;
+      break;
+    }
+    case cmStateEnums::GLOBAL_TARGET: {
+      this->TargetNameReal = this->GeneratorTarget->GetName();
+      if (this->TargetNameReal ==
+          this->GetGlobalGenerator()->GetInstallTargetName()) {
+        this->TagType = GhsMultiGpj::CUSTOM_TARGET;
+      } else {
+        return;
+      }
+      break;
     }
     default:
       return;
@@ -105,29 +119,29 @@ void cmGhsMultiTargetGenerator::Generate()
 
 void cmGhsMultiTargetGenerator::GenerateTarget()
 {
-  // Open the filestream in copy-if-different mode.
-  std::string fname = this->LocalGenerator->GetCurrentBinaryDirectory();
-  fname += "/";
-  fname += this->Name;
-  fname += cmGlobalGhsMultiGenerator::FILE_EXTENSION;
-  cmGeneratedFileStream fout(fname);
+  // Open the target file in copy-if-different mode.
+  std::string fproj = this->LocalGenerator->GetCurrentBinaryDirectory();
+  fproj += "/";
+  fproj += this->Name;
+  fproj += cmGlobalGhsMultiGenerator::FILE_EXTENSION;
+  cmGeneratedFileStream fout(fproj);
   fout.SetCopyIfDifferent(true);
 
   this->GetGlobalGenerator()->WriteFileHeader(fout);
   GhsMultiGpj::WriteGpjTag(this->TagType, fout);
 
-  const std::string language(
-    this->GeneratorTarget->GetLinkerLanguage(this->ConfigName));
-
-  this->WriteTargetSpecifics(fout, this->ConfigName);
-  this->SetCompilerFlags(this->ConfigName, language);
-  this->WriteCompilerFlags(fout, this->ConfigName, language);
-  this->WriteCompilerDefinitions(fout, this->ConfigName, language);
-  this->WriteIncludes(fout, this->ConfigName, language);
-  this->WriteTargetLinkLine(fout, this->ConfigName);
-  this->WriteCustomCommands(fout);
+  if (this->TagType != GhsMultiGpj::CUSTOM_TARGET) {
+    const std::string language(
+      this->GeneratorTarget->GetLinkerLanguage(this->ConfigName));
+    this->WriteTargetSpecifics(fout, this->ConfigName);
+    this->SetCompilerFlags(this->ConfigName, language);
+    this->WriteCompilerFlags(fout, this->ConfigName, language);
+    this->WriteCompilerDefinitions(fout, this->ConfigName, language);
+    this->WriteIncludes(fout, this->ConfigName, language);
+    this->WriteTargetLinkLine(fout, this->ConfigName);
+    this->WriteBuildEvents(fout);
+  }
   this->WriteSources(fout);
-  this->WriteReferences(fout);
   fout.Close();
 }
 
@@ -304,47 +318,145 @@ void cmGhsMultiTargetGenerator::WriteTargetLinkLine(std::ostream& fout,
   }
 }
 
-void cmGhsMultiTargetGenerator::WriteCustomCommands(std::ostream& fout)
+void cmGhsMultiTargetGenerator::WriteBuildEvents(std::ostream& fout)
 {
-  WriteCustomCommandsHelper(fout, this->GeneratorTarget->GetPreBuildCommands(),
-                            cmTarget::PRE_BUILD);
-  WriteCustomCommandsHelper(
-    fout, this->GeneratorTarget->GetPostBuildCommands(), cmTarget::POST_BUILD);
+  this->WriteBuildEventsHelper(
+    fout, this->GeneratorTarget->GetPreBuildCommands(),
+    std::string("prebuild"), std::string("preexecShell"));
+
+  if (this->TagType != GhsMultiGpj::CUSTOM_TARGET) {
+    this->WriteBuildEventsHelper(
+      fout, this->GeneratorTarget->GetPreLinkCommands(),
+      std::string("prelink"), std::string("preexecShell"));
+  }
+
+  this->WriteBuildEventsHelper(
+    fout, this->GeneratorTarget->GetPostBuildCommands(),
+    std::string("postbuild"), std::string("postexecShell"));
+}
+
+void cmGhsMultiTargetGenerator::WriteBuildEventsHelper(
+  std::ostream& fout, const std::vector<cmCustomCommand>& ccv,
+  std::string const& name, std::string const& cmd)
+{
+  int cmdcount = 0;
+
+  for (cmCustomCommand const& cc : ccv) {
+    cmCustomCommandGenerator ccg(cc, this->ConfigName, this->LocalGenerator);
+    // Open the filestream for this custom command
+    std::string fname = this->LocalGenerator->GetCurrentBinaryDirectory();
+    fname +=
+      "/" + this->LocalGenerator->GetTargetDirectory(this->GeneratorTarget);
+    fname += "/" + this->Name + "_" + name;
+    fname += std::to_string(cmdcount++);
+    fname += this->CmdWindowsShell ? ".bat" : ".sh";
+    cmGeneratedFileStream f(fname);
+    f.SetCopyIfDifferent(true);
+    this->WriteCustomCommandsHelper(f, ccg);
+    f.Close();
+    if (this->TagType != GhsMultiGpj::CUSTOM_TARGET) {
+      fout << "    :" << cmd << "=\"" << fname << "\"" << std::endl;
+    } else {
+      fout << fname << std::endl;
+      fout << "    :outputName=\"" << fname << ".rule\"" << std::endl;
+    }
+    for (auto& byp : ccg.GetByproducts()) {
+      fout << "    :extraOutputFile=\"" << byp << "\"" << std::endl;
+    }
+  }
 }
 
 void cmGhsMultiTargetGenerator::WriteCustomCommandsHelper(
-  std::ostream& fout, std::vector<cmCustomCommand> const& commandsSet,
-  cmTarget::CustomCommandType const commandType)
+  std::ostream& fout, cmCustomCommandGenerator const& ccg)
 {
-  for (cmCustomCommand const& customCommand : commandsSet) {
-    cmCustomCommandLines const& commandLines = customCommand.GetCommandLines();
-    for (cmCustomCommandLine const& command : commandLines) {
-      switch (commandType) {
-        case cmTarget::PRE_BUILD:
-          fout << "    :preexecShellSafe=";
-          break;
-        case cmTarget::POST_BUILD:
-          fout << "    :postexecShellSafe=";
-          break;
-        default:
-          assert("Only pre and post are supported");
+  std::vector<std::string> cmdLines;
+
+  // if the command specified a working directory use it.
+  std::string dir = this->LocalGenerator->GetCurrentBinaryDirectory();
+  std::string currentBinDir = dir;
+  std::string workingDir = ccg.GetWorkingDirectory();
+  if (!workingDir.empty()) {
+    dir = workingDir;
+  }
+
+  // Line to check for error between commands.
+#ifdef _WIN32
+  std::string check_error = "if %errorlevel% neq 0 exit /b %errorlevel%";
+#else
+  std::string check_error = "if [[ $? -ne 0 ]]; then exit 1; fi";
+#endif
+
+#ifdef _WIN32
+  cmdLines.push_back("@echo off");
+#endif
+  // Echo the custom command's comment text.
+  const char* comment = ccg.GetComment();
+  if (comment && *comment) {
+    std::string echocmd = "echo ";
+    echocmd += comment;
+    cmdLines.push_back(std::move(echocmd));
+  }
+
+  // Switch to working directory
+  std::string cdCmd;
+#ifdef _WIN32
+  std::string cdStr = "cd /D ";
+#else
+  std::string cdStr = "cd ";
+#endif
+  cdCmd = cdStr +
+    this->LocalGenerator->ConvertToOutputFormat(dir, cmOutputConverter::SHELL);
+  cmdLines.push_back(std::move(cdCmd));
+
+  for (unsigned int c = 0; c < ccg.GetNumberOfCommands(); ++c) {
+    // Build the command line in a single string.
+    std::string cmd = ccg.GetCommand(c);
+    if (!cmd.empty()) {
+      // Use "call " before any invocations of .bat or .cmd files
+      // invoked as custom commands in the WindowsShell.
+      //
+      bool useCall = false;
+
+      if (this->CmdWindowsShell) {
+        std::string suffix;
+        if (cmd.size() > 4) {
+          suffix = cmSystemTools::LowerCase(cmd.substr(cmd.size() - 4));
+          if (suffix == ".bat" || suffix == ".cmd") {
+            useCall = true;
+          }
+        }
       }
 
-      bool firstIteration = true;
-      for (std::string const& commandLine : command) {
-        std::string subCommandE =
-          this->LocalGenerator->EscapeForShell(commandLine, true);
-        fout << (firstIteration ? "'" : " ");
-        // Need to double escape backslashes
-        cmSystemTools::ReplaceString(subCommandE, "\\", "\\\\");
-        fout << subCommandE;
-        firstIteration = false;
+      cmSystemTools::ReplaceString(cmd, "/./", "/");
+      // Convert the command to a relative path only if the current
+      // working directory will be the start-output directory.
+      bool had_slash = cmd.find('/') != std::string::npos;
+      if (workingDir.empty()) {
+        cmd =
+          this->LocalGenerator->MaybeConvertToRelativePath(currentBinDir, cmd);
       }
-      if (!command.empty()) {
-        fout << "'" << std::endl;
+      bool has_slash = cmd.find('/') != std::string::npos;
+      if (had_slash && !has_slash) {
+        // This command was specified as a path to a file in the
+        // current directory.  Add a leading "./" so it can run
+        // without the current directory being in the search path.
+        cmd = "./" + cmd;
       }
+      cmd = this->LocalGenerator->ConvertToOutputFormat(
+        cmd, cmOutputConverter::SHELL);
+      if (useCall) {
+        cmd = "call " + cmd;
+      }
+      ccg.AppendArguments(c, cmd);
+      cmdLines.push_back(std::move(cmd));
     }
   }
+
+  // push back the custom commands
+  for (auto const& c : cmdLines) {
+    fout << c << std::endl;
+    fout << check_error << std::endl;
+  }
 }
 
 void cmGhsMultiTargetGenerator::WriteSourceProperty(
@@ -385,7 +497,7 @@ void cmGhsMultiTargetGenerator::WriteSources(std::ostream& fout_proj)
 
   /* list of known groups and the order they are displayed in a project file */
   const std::vector<std::string> standardGroups = {
-    "Header Files", "Source Files",     "CMake Rules",
+    "CMake Rules",  "Header Files",     "Source Files",
     "Object Files", "Object Libraries", "Resources"
   };
 
@@ -403,6 +515,14 @@ void cmGhsMultiTargetGenerator::WriteSources(std::ostream& fout_proj)
       groupFilesList[i] = *n;
       i += 1;
       groupNames.erase(gn);
+    } else if (this->TagType == GhsMultiGpj::CUSTOM_TARGET &&
+               gn == "CMake Rules") {
+      /* make sure that rules folder always exists in case of custom targets
+       * that have no custom commands except for pre or post build events.
+       */
+      groupFilesList.resize(groupFilesList.size() + 1);
+      groupFilesList[i] = gn;
+      i += 1;
     }
   }
 
@@ -433,7 +553,7 @@ void cmGhsMultiTargetGenerator::WriteSources(std::ostream& fout_proj)
 
   /* write files into the proper project file
    * -- groups go into main project file
-   *    unless FOLDER property or variable is set.
+   *    unless NO_SOURCE_GROUP_FILE property or variable is set.
    */
   for (auto& sg : groupFilesList) {
     std::ostream* fout;
@@ -472,33 +592,98 @@ void cmGhsMultiTargetGenerator::WriteSources(std::ostream& fout_proj)
       } else {
         *fout << "{comment} " << sg << std::endl;
       }
+    } else if (sg.empty()) {
+      *fout << "{comment} Others" << std::endl;
     }
 
-    /* output rule for each source file */
-    for (const cmSourceFile* si : groupFiles[sg]) {
-
-      // Convert filename to native system
-      // WORKAROUND: GHS MULTI 6.1.4 and 6.1.6 are known to need backslash on
-      // windows when opening some files from the search window.
-      std::string fname(si->GetFullPath());
-      cmSystemTools::ConvertToOutputSlashes(fname);
-      *fout << fname << std::endl;
-
-      if ("ld" != si->GetExtension() && "int" != si->GetExtension() &&
-          "bsp" != si->GetExtension()) {
-        WriteObjectLangOverride(*fout, si);
+    if (sg != "CMake Rules") {
+      /* output rule for each source file */
+      for (const cmSourceFile* si : groupFiles[sg]) {
+        bool compile = true;
+        // Convert filename to native system
+        // WORKAROUND: GHS MULTI 6.1.4 and 6.1.6 are known to need backslash on
+        // windows when opening some files from the search window.
+        std::string fname(si->GetFullPath());
+        cmSystemTools::ConvertToOutputSlashes(fname);
+
+        /* For custom targets list any associated sources,
+         * comment out source code to prevent it from being
+         * compiled when processing this target.
+         * Otherwise, comment out any custom command (main) dependencies that
+         * are listed as source files to prevent them from being considered
+         * part of the build.
+         */
+        std::string comment;
+        if ((this->TagType == GhsMultiGpj::CUSTOM_TARGET &&
+             !si->GetLanguage().empty()) ||
+            si->GetCustomCommand()) {
+          comment = "{comment} ";
+          compile = false;
+        }
+
+        *fout << comment << fname << std::endl;
+        if (compile) {
+          if ("ld" != si->GetExtension() && "int" != si->GetExtension() &&
+              "bsp" != si->GetExtension()) {
+            WriteObjectLangOverride(*fout, si);
+          }
+
+          this->WriteSourceProperty(*fout, si, "INCLUDE_DIRECTORIES", "-I");
+          this->WriteSourceProperty(*fout, si, "COMPILE_DEFINITIONS", "-D");
+          this->WriteSourceProperty(*fout, si, "COMPILE_OPTIONS", "");
+
+          /* to avoid clutter in the GUI only print out the objectName if it
+           * has been renamed */
+          std::string objectName = this->GeneratorTarget->GetObjectName(si);
+          if (!objectName.empty() &&
+              this->GeneratorTarget->HasExplicitObjectName(si)) {
+            *fout << "    -o " << objectName << std::endl;
+          }
+        }
       }
-
-      this->WriteSourceProperty(*fout, si, "INCLUDE_DIRECTORIES", "-I");
-      this->WriteSourceProperty(*fout, si, "COMPILE_DEFINITIONS", "-D");
-      this->WriteSourceProperty(*fout, si, "COMPILE_OPTIONS", "");
-
-      /* to avoid clutter in the gui only print out the objectName if it has
-       * been renamed */
-      std::string objectName = this->GeneratorTarget->GetObjectName(si);
-      if (!objectName.empty() &&
-          this->GeneratorTarget->HasExplicitObjectName(si)) {
-        *fout << "    -o " << objectName << std::endl;
+    } else {
+      std::vector<cmSourceFile const*> customCommands;
+      if (ComputeCustomCommandOrder(customCommands)) {
+        std::string message = "The custom commands for target [" +
+          this->GeneratorTarget->GetName() + "] had a cycle.\n";
+        cmSystemTools::Error(message);
+      } else {
+        /* Custom targets do not have a dependency on SOURCES files.
+         * Therefore the dependency list may include SOURCES files after the
+         * custom target. Because nothing can depend on the custom target just
+         * move it to the last item.
+         */
+        for (auto sf = customCommands.begin(); sf != customCommands.end();
+             ++sf) {
+          if (((*sf)->GetLocation()).GetName() == this->Name + ".rule") {
+            std::rotate(sf, sf + 1, customCommands.end());
+            break;
+          }
+        }
+        int cmdcount = 0;
+        for (auto& sf : customCommands) {
+          const cmCustomCommand* cc = sf->GetCustomCommand();
+          cmCustomCommandGenerator ccg(*cc, this->ConfigName,
+                                       this->LocalGenerator);
+
+          // Open the filestream for this custom command
+          std::string fname =
+            this->LocalGenerator->GetCurrentBinaryDirectory();
+          fname += "/" +
+            this->LocalGenerator->GetTargetDirectory(this->GeneratorTarget);
+          fname += "/" + this->Name + "_cc";
+          fname += std::to_string(cmdcount++) + "_";
+          fname += (sf->GetLocation()).GetName();
+          fname += this->CmdWindowsShell ? ".bat" : ".sh";
+          cmGeneratedFileStream f(fname);
+          f.SetCopyIfDifferent(true);
+          this->WriteCustomCommandsHelper(f, ccg);
+          f.Close();
+          this->WriteCustomCommandLine(*fout, fname, ccg);
+        }
+      }
+      if (this->TagType == GhsMultiGpj::CUSTOM_TARGET) {
+        this->WriteBuildEvents(*fout);
       }
     }
   }
@@ -508,6 +693,33 @@ void cmGhsMultiTargetGenerator::WriteSources(std::ostream& fout_proj)
   }
 }
 
+void cmGhsMultiTargetGenerator::WriteCustomCommandLine(
+  std::ostream& fout, std::string& fname, cmCustomCommandGenerator const& ccg)
+{
+  /* NOTE: Customization Files are not well documented.  Testing showed
+   * that ":outputName=file" can only be used once per script.  The
+   * script will only run if ":outputName=file" is missing or just run
+   * once if ":outputName=file" is not specified.  If there are
+   * multiple outputs then the script needs to be listed multiple times
+   * for each output.  Otherwise it won't rerun the script if one of
+   * the outputs is manually deleted.
+   */
+  bool specifyExtra = true;
+  for (auto& out : ccg.GetOutputs()) {
+    fout << fname << std::endl;
+    fout << "    :outputName=\"" << out << "\"" << std::endl;
+    if (specifyExtra) {
+      for (auto& byp : ccg.GetByproducts()) {
+        fout << "    :extraOutputFile=\"" << byp << "\"" << std::endl;
+      }
+      for (auto& dep : ccg.GetDepends()) {
+        fout << "    :depends=\"" << dep << "\"" << std::endl;
+      }
+      specifyExtra = false;
+    }
+  }
+}
+
 void cmGhsMultiTargetGenerator::WriteObjectLangOverride(
   std::ostream& fout, const cmSourceFile* sourceFile)
 {
@@ -521,35 +733,6 @@ void cmGhsMultiTargetGenerator::WriteObjectLangOverride(
   }
 }
 
-void cmGhsMultiTargetGenerator::WriteReferences(std::ostream& fout)
-{
-  // This only applies to INTEGRITY Applications
-  if (this->TagType != GhsMultiGpj::INTERGRITY_APPLICATION) {
-    return;
-  }
-
-  // Get the targets that this one depends upon
-  cmTargetDependSet unordered =
-    this->GetGlobalGenerator()->GetTargetDirectDepends(this->GeneratorTarget);
-  cmGlobalGhsMultiGenerator::OrderedTargetDependSet ordered(unordered,
-                                                            this->Name);
-  for (auto& t : ordered) {
-    std::string tname = t->GetName();
-    std::string tpath = t->LocalGenerator->GetCurrentBinaryDirectory();
-    std::string rootpath = this->LocalGenerator->GetCurrentBinaryDirectory();
-    std::string outpath =
-      this->LocalGenerator->MaybeConvertToRelativePath(rootpath, tpath) + "/" +
-      tname + "REF" + cmGlobalGhsMultiGenerator::FILE_EXTENSION;
-
-    fout << outpath;
-    fout << "    ";
-    GhsMultiGpj::WriteGpjTag(GhsMultiGpj::REFERENCE, fout);
-
-    // Tell the global generator that a refernce project needs to be created
-    t->Target->SetProperty("GHS_REFERENCE_PROJECT", "ON");
-  }
-}
-
 bool cmGhsMultiTargetGenerator::DetermineIfIntegrityApp()
 {
   const char* p = this->GeneratorTarget->GetProperty("ghs_integrity_app");
@@ -566,3 +749,51 @@ bool cmGhsMultiTargetGenerator::DetermineIfIntegrityApp()
   }
   return false;
 }
+
+bool cmGhsMultiTargetGenerator::ComputeCustomCommandOrder(
+  std::vector<cmSourceFile const*>& order)
+{
+  std::set<cmSourceFile const*> temp;
+  std::set<cmSourceFile const*> perm;
+
+  // Collect all custom commands for this target
+  std::vector<cmSourceFile const*> customCommands;
+  this->GeneratorTarget->GetCustomCommands(customCommands, this->ConfigName);
+
+  for (cmSourceFile const* si : customCommands) {
+    bool r = VisitCustomCommand(temp, perm, order, si);
+    if (r) {
+      return r;
+    }
+  }
+  return false;
+}
+
+bool cmGhsMultiTargetGenerator::VisitCustomCommand(
+  std::set<cmSourceFile const*>& temp, std::set<cmSourceFile const*>& perm,
+  std::vector<cmSourceFile const*>& order, cmSourceFile const* si)
+{
+  /* check if permanent mark is set*/
+  if (perm.find(si) == perm.end()) {
+    /* set temporary mark; check if revisit*/
+    if (temp.insert(si).second) {
+      for (auto& di : si->GetCustomCommand()->GetDepends()) {
+        cmSourceFile const* sf = this->GeneratorTarget->GetLocalGenerator()
+                                   ->GetMakefile()
+                                   ->GetSourceFileWithOutput(di);
+        /* if sf exists then visit */
+        if (sf && this->VisitCustomCommand(temp, perm, order, sf)) {
+          return true;
+        }
+      }
+      /* mark as complete; insert into beginning of list*/
+      perm.insert(si);
+      order.push_back(si);
+      return false;
+    }
+    /* revisiting item - not a DAG */
+    return true;
+  }
+  /* already complete */
+  return false;
+}
diff --git a/Source/cmGhsMultiTargetGenerator.h b/Source/cmGhsMultiTargetGenerator.h
index a4e23d9..a131567 100644
--- a/Source/cmGhsMultiTargetGenerator.h
+++ b/Source/cmGhsMultiTargetGenerator.h
@@ -5,14 +5,14 @@
 
 #include "cmGhsMultiGpj.h"
 
-#include "cmTarget.h"
-
 #include <iosfwd>
 #include <map>
+#include <set>
 #include <string>
 #include <vector>
 
 class cmCustomCommand;
+class cmCustomCommandGenerator;
 class cmGeneratorTarget;
 class cmGlobalGhsMultiGenerator;
 class cmLocalGhsMultiGenerator;
@@ -49,15 +49,23 @@ private:
   void WriteIncludes(std::ostream& fout, const std::string& config,
                      const std::string& language);
   void WriteTargetLinkLine(std::ostream& fout, std::string const& config);
-  void WriteCustomCommands(std::ostream& fout);
-  void WriteCustomCommandsHelper(
-    std::ostream& fout, std::vector<cmCustomCommand> const& commandsSet,
-    cmTarget::CustomCommandType commandType);
+  void WriteBuildEvents(std::ostream& fout);
+  void WriteBuildEventsHelper(std::ostream& fout,
+                              const std::vector<cmCustomCommand>& ccv,
+                              std::string const& name, std::string const& cmd);
+  void WriteCustomCommandsHelper(std::ostream& fout,
+                                 cmCustomCommandGenerator const& ccg);
+  void WriteCustomCommandLine(std::ostream& fout, std::string& fname,
+                              cmCustomCommandGenerator const& ccg);
+  bool ComputeCustomCommandOrder(std::vector<cmSourceFile const*>& order);
+  bool VisitCustomCommand(std::set<cmSourceFile const*>& temp,
+                          std::set<cmSourceFile const*>& perm,
+                          std::vector<cmSourceFile const*>& order,
+                          cmSourceFile const* sf);
   void WriteSources(std::ostream& fout_proj);
   void WriteSourceProperty(std::ostream& fout, const cmSourceFile* sf,
                            std::string const& propName,
                            std::string const& propFlag);
-  void WriteReferences(std::ostream& fout);
   static void WriteObjectLangOverride(std::ostream& fout,
                                       const cmSourceFile* sourceFile);
 
@@ -71,7 +79,8 @@ private:
   std::string TargetNameReal;
   GhsMultiGpj::Types TagType;
   std::string const Name;
-  std::string ConfigName; /* CMAKE_BUILD_TYPE */
+  std::string ConfigName;     /* CMAKE_BUILD_TYPE */
+  bool const CmdWindowsShell; /* custom commands run in cmd.exe or /bin/sh */
 };
 
 #endif // ! cmGhsMultiTargetGenerator_h
diff --git a/Source/cmGlobalGhsMultiGenerator.cxx b/Source/cmGlobalGhsMultiGenerator.cxx
index 9f361f6..b69dea0 100644
--- a/Source/cmGlobalGhsMultiGenerator.cxx
+++ b/Source/cmGlobalGhsMultiGenerator.cxx
@@ -265,14 +265,68 @@ void cmGlobalGhsMultiGenerator::WriteFileHeader(std::ostream& fout)
        << std::endl;
 }
 
-void cmGlobalGhsMultiGenerator::WriteTopLevelProject(
-  std::ostream& fout, cmLocalGenerator* root,
-  std::vector<cmLocalGenerator*>& generators)
+void cmGlobalGhsMultiGenerator::WriteCustomRuleBOD(std::ostream& fout)
 {
-  WriteFileHeader(fout);
+  fout << "Commands {\n"
+          "  Custom_Rule_Command {\n"
+          "    name = \"Custom Rule Command\"\n"
+          "    exec = \"";
+#ifdef _WIN32
+  fout << "cmd.exe";
+#else
+  fout << "/bin/sh";
+#endif
+  fout << "\"\n"
+          "    options = {\"SpecialOptions\"}\n"
+          "  }\n"
+          "}\n";
+
+  fout << "\n\n";
+  fout << "FileTypes {\n"
+          "  CmakeRule {\n"
+          "    name = \"Custom Rule\"\n"
+          "    action = \"&Run\"\n"
+          "    extensions = {\"";
+#ifdef _WIN32
+  fout << "bat";
+#else
+  fout << "sh";
+#endif
+  fout << "\"}\n"
+          "    grepable = false\n"
+          "    command = \"Custom Rule Command\"\n"
+          "    commandLine = \"$COMMAND ";
+#ifdef _WIN32
+  fout << "/c";
+#endif
+  fout << " $INPUTFILE\"\n"
+          "    progress = \"Processing Custom Rule\"\n"
+          "    promoteToFirstPass = true\n"
+          "    outputType = \"None\"\n"
+          "    color = \"#800080\"\n"
+          "  }\n"
+          "}\n";
+}
 
-  this->WriteMacros(fout);
-  this->WriteHighLevelDirectives(fout);
+void cmGlobalGhsMultiGenerator::WriteCustomTargetBOD(std::ostream& fout)
+{
+  fout << "FileTypes {\n"
+          "  CmakeTarget {\n"
+          "    name = \"Custom Target\"\n"
+          "    action = \"&Execute\"\n"
+          "    grepable = false\n"
+          "    outputType = \"None\"\n"
+          "    color = \"#800080\"\n"
+          "  }\n"
+          "}\n";
+}
+
+void cmGlobalGhsMultiGenerator::WriteTopLevelProject(std::ostream& fout,
+                                                     cmLocalGenerator* root)
+{
+  this->WriteFileHeader(fout);
+  this->WriteMacros(fout, root);
+  this->WriteHighLevelDirectives(root, fout);
   GhsMultiGpj::WriteGpjTag(GhsMultiGpj::PROJECT, fout);
 
   fout << "# Top Level Project File" << std::endl;
@@ -298,71 +352,152 @@ void cmGlobalGhsMultiGenerator::WriteTopLevelProject(
     }
     fout << "\"" << this->OsDir << "\"" << std::endl;
   }
-
-  WriteSubProjects(fout, root, generators);
 }
 
-void cmGlobalGhsMultiGenerator::WriteSubProjects(
-  std::ostream& fout, cmLocalGenerator* root,
-  std::vector<cmLocalGenerator*>& generators)
+void cmGlobalGhsMultiGenerator::WriteSubProjects(std::ostream& fout,
+                                                 std::string& all_target)
 {
-  // Collect all targets under this root generator and the transitive
-  // closure of their dependencies.
-  TargetDependSet projectTargets;
-  TargetDependSet originalTargets;
-  this->GetTargetSets(projectTargets, originalTargets, root, generators);
-  OrderedTargetDependSet orderedProjectTargets(projectTargets, "");
-
-  // write out all the sub-projects
-  std::string rootBinaryDir = root->GetCurrentBinaryDirectory();
-  for (cmGeneratorTarget const* target : orderedProjectTargets) {
-    if (target->GetType() == cmStateEnums::INTERFACE_LIBRARY) {
+  fout << "CMakeFiles/" << all_target << " [Project]" << std::endl;
+  // All known targets
+  for (cmGeneratorTarget const* target : this->ProjectTargets) {
+    if (target->GetType() == cmStateEnums::INTERFACE_LIBRARY ||
+        target->GetType() == cmStateEnums::MODULE_LIBRARY ||
+        target->GetType() == cmStateEnums::SHARED_LIBRARY ||
+        (target->GetType() == cmStateEnums::GLOBAL_TARGET &&
+         target->GetName() != GetInstallTargetName())) {
       continue;
     }
+    fout << "CMakeFiles/" << target->GetName() + ".tgt" + FILE_EXTENSION
+         << " [Project]" << std::endl;
+  }
+}
 
-    const char* projName = target->GetProperty("GENERATOR_FILE_NAME");
-    const char* projType = target->GetProperty("GENERATOR_FILE_NAME_EXT");
-    if (projName && projType) {
-      cmLocalGenerator* lg = target->GetLocalGenerator();
-      std::string dir = lg->GetCurrentBinaryDirectory();
-      dir = root->MaybeConvertToRelativePath(rootBinaryDir, dir);
-      if (dir == ".") {
-        dir.clear();
-      } else {
-        if (dir.back() != '/') {
-          dir += "/";
-        }
+void cmGlobalGhsMultiGenerator::WriteProjectLine(
+  std::ostream& fout, cmGeneratorTarget const* target, cmLocalGenerator* root,
+  std::string& rootBinaryDir)
+{
+  const char* projName = target->GetProperty("GENERATOR_FILE_NAME");
+  const char* projType = target->GetProperty("GENERATOR_FILE_NAME_EXT");
+  if (projName && projType) {
+    cmLocalGenerator* lg = target->GetLocalGenerator();
+    std::string dir = lg->GetCurrentBinaryDirectory();
+    dir = root->MaybeConvertToRelativePath(rootBinaryDir, dir);
+    if (dir == ".") {
+      dir.clear();
+    } else {
+      if (dir.back() != '/') {
+        dir += "/";
       }
+    }
 
-      if (cmSystemTools::IsOn(target->GetProperty("EXCLUDE_FROM_ALL"))) {
-        fout << "{comment} ";
-      }
-      std::string projFile = dir + projName + FILE_EXTENSION;
-      fout << projFile;
-      fout << " " << projType << std::endl;
+    std::string projFile = dir + projName + FILE_EXTENSION;
+    fout << projFile;
+    fout << " " << projType << std::endl;
+  } else {
+    /* Should never happen */
+    std::string message =
+      "The project file for target [" + target->GetName() + "] is missing.\n";
+    cmSystemTools::Error(message);
+    fout << "{comment} " << target->GetName() << " [missing project file]\n";
+  }
+}
 
-      if (cmSystemTools::IsOn(target->GetProperty("GHS_REFERENCE_PROJECT"))) {
-        // create reference project
-        std::string fname = dir;
-        fname += target->GetName();
-        fname += "REF";
-        fname += FILE_EXTENSION;
+void cmGlobalGhsMultiGenerator::WriteTargets(cmLocalGenerator* root)
+{
+  std::string rootBinaryDir = root->GetCurrentBinaryDirectory();
+  rootBinaryDir += "/CMakeFiles";
+
+  // All known targets
+  for (cmGeneratorTarget const* target : this->ProjectTargets) {
+    if (target->GetType() == cmStateEnums::INTERFACE_LIBRARY ||
+        target->GetType() == cmStateEnums::MODULE_LIBRARY ||
+        target->GetType() == cmStateEnums::SHARED_LIBRARY ||
+        (target->GetType() == cmStateEnums::GLOBAL_TARGET &&
+         target->GetName() != GetInstallTargetName())) {
+      continue;
+    }
 
-        cmGeneratedFileStream fref(fname);
-        fref.SetCopyIfDifferent(true);
+    // create target build file
+    std::string name = target->GetName() + ".tgt" + FILE_EXTENSION;
+    std::string fname = rootBinaryDir + "/" + name;
+    cmGeneratedFileStream fbld(fname);
+    fbld.SetCopyIfDifferent(true);
+    this->WriteFileHeader(fbld);
+    GhsMultiGpj::WriteGpjTag(GhsMultiGpj::PROJECT, fbld);
+    std::vector<cmGeneratorTarget const*> build;
+    if (ComputeTargetBuildOrder(target, build)) {
+      std::string message = "The inter-target dependency graph for target [" +
+        target->GetName() + "] had a cycle.\n";
+      cmSystemTools::Error(message);
+    } else {
+      for (auto& tgt : build) {
+        WriteProjectLine(fbld, tgt, root, rootBinaryDir);
+      }
+    }
+    fbld.Close();
+  }
+}
 
-        this->WriteFileHeader(fref);
-        GhsMultiGpj::WriteGpjTag(GhsMultiGpj::REFERENCE, fref);
-        fref << "    :reference=" << projFile << std::endl;
+void cmGlobalGhsMultiGenerator::WriteAllTarget(
+  cmLocalGenerator* root, std::vector<cmLocalGenerator*>& generators,
+  std::string& all_target)
+{
+  this->ProjectTargets.clear();
+
+  // create target build file
+  all_target = root->GetProjectName() + "." + this->GetAllTargetName() +
+    ".tgt" + FILE_EXTENSION;
+  std::string fname =
+    root->GetCurrentBinaryDirectory() + "/CMakeFiles/" + all_target;
+  cmGeneratedFileStream fbld(fname);
+  fbld.SetCopyIfDifferent(true);
+  this->WriteFileHeader(fbld);
+  GhsMultiGpj::WriteGpjTag(GhsMultiGpj::PROJECT, fbld);
 
-        fref.Close();
+  // Collect all targets under this root generator and the transitive
+  // closure of their dependencies.
+  TargetDependSet projectTargets;
+  TargetDependSet originalTargets;
+  this->GetTargetSets(projectTargets, originalTargets, root, generators);
+  OrderedTargetDependSet sortedProjectTargets(projectTargets, "");
+  std::vector<cmGeneratorTarget const*> defaultTargets;
+  for (cmGeneratorTarget const* t : sortedProjectTargets) {
+    /* save list of all targets in sorted order */
+    this->ProjectTargets.push_back(t);
+  }
+  for (cmGeneratorTarget const* t : sortedProjectTargets) {
+    if (t->GetType() == cmStateEnums::INTERFACE_LIBRARY) {
+      continue;
+    }
+    if (!cmSystemTools::IsOn(t->GetProperty("EXCLUDE_FROM_ALL"))) {
+      defaultTargets.push_back(t);
+    }
+  }
+  std::vector<cmGeneratorTarget const*> build;
+  if (ComputeTargetBuildOrder(defaultTargets, build)) {
+    std::string message = "The inter-target dependency graph for project [" +
+      root->GetProjectName() + "] had a cycle.\n";
+    cmSystemTools::Error(message);
+  } else {
+    // determine the targets for ALL target
+    std::string rootBinaryDir = root->GetCurrentBinaryDirectory();
+    rootBinaryDir += "/CMakeFiles";
+    for (cmGeneratorTarget const* target : build) {
+      if (target->GetType() == cmStateEnums::INTERFACE_LIBRARY ||
+          target->GetType() == cmStateEnums::MODULE_LIBRARY ||
+          target->GetType() == cmStateEnums::SHARED_LIBRARY) {
+        continue;
       }
+      this->WriteProjectLine(fbld, target, root, rootBinaryDir);
     }
   }
+  fbld.Close();
 }
 
 void cmGlobalGhsMultiGenerator::Generate()
 {
+  std::string fname;
+
   // first do the superclass method
   this->cmGlobalGenerator::Generate();
 
@@ -370,11 +505,32 @@ void cmGlobalGhsMultiGenerator::Generate()
   for (auto& it : this->ProjectMap) {
     this->OutputTopLevelProject(it.second[0], it.second);
   }
+
+  // create custom rule BOD file
+  fname = this->GetCMakeInstance()->GetHomeOutputDirectory() +
+    "/CMakeFiles/custom_rule.bod";
+  cmGeneratedFileStream frule(fname);
+  frule.SetCopyIfDifferent(true);
+  this->WriteFileHeader(frule);
+  this->WriteCustomRuleBOD(frule);
+  frule.Close();
+
+  // create custom target BOD file
+  fname = this->GetCMakeInstance()->GetHomeOutputDirectory() +
+    "/CMakeFiles/custom_target.bod";
+  cmGeneratedFileStream ftarget(fname);
+  ftarget.SetCopyIfDifferent(true);
+  this->WriteFileHeader(ftarget);
+  this->WriteCustomTargetBOD(ftarget);
+  ftarget.Close();
 }
 
 void cmGlobalGhsMultiGenerator::OutputTopLevelProject(
   cmLocalGenerator* root, std::vector<cmLocalGenerator*>& generators)
 {
+  std::string fname;
+  std::string all_target;
+
   if (generators.empty()) {
     return;
   }
@@ -383,18 +539,21 @@ void cmGlobalGhsMultiGenerator::OutputTopLevelProject(
    * with target projects.  This avoid the issue where the project has
    * the same name as the executable target.
    */
-  std::string fname = root->GetCurrentBinaryDirectory();
+  fname = root->GetCurrentBinaryDirectory();
   fname += "/";
   fname += root->GetProjectName();
   fname += ".top";
   fname += FILE_EXTENSION;
 
-  cmGeneratedFileStream fout(fname);
-  fout.SetCopyIfDifferent(true);
+  cmGeneratedFileStream top(fname);
+  top.SetCopyIfDifferent(true);
+  this->WriteTopLevelProject(top, root);
 
-  this->WriteTopLevelProject(fout, root, generators);
+  this->WriteAllTarget(root, generators, all_target);
+  this->WriteTargets(root);
 
-  fout.Close();
+  this->WriteSubProjects(top, all_target);
+  top.Close();
 }
 
 std::vector<cmGlobalGenerator::GeneratedMakeCommand>
@@ -426,6 +585,9 @@ cmGlobalGhsMultiGenerator::GenerateBuildCommand(
   std::vector<std::string> files;
   cmSystemTools::Glob(projectDir, ".*\\.top\\.gpj", files);
   if (!files.empty()) {
+    /* if multiple top-projects are found in build directory
+     * then prefer projectName top-project.
+     */
     auto p = std::find(files.begin(), files.end(), proj);
     if (p == files.end()) {
       proj = files.at(0);
@@ -440,20 +602,24 @@ cmGlobalGhsMultiGenerator::GenerateBuildCommand(
     } else {
       for (const auto& tname : targetNames) {
         if (!tname.empty()) {
-          if (tname.compare(tname.size() - 4, 4, ".gpj") == 0) {
-            makeCommand.Add(tname);
-          } else {
-            makeCommand.Add(tname + ".gpj");
-          }
+          makeCommand.Add(tname + ".tgt.gpj");
         }
       }
     }
+  } else {
+    /* transform name to default build */;
+    std::string all = proj;
+    all.replace(all.end() - 7, all.end(),
+                std::string(this->GetAllTargetName()) + ".tgt.gpj");
+    makeCommand.Add(all);
   }
   return { makeCommand };
 }
 
-void cmGlobalGhsMultiGenerator::WriteMacros(std::ostream& fout)
+void cmGlobalGhsMultiGenerator::WriteMacros(std::ostream& fout,
+                                            cmLocalGenerator* root)
 {
+  fout << "macro PROJ_NAME=" << root->GetProjectName() << std::endl;
   char const* ghsGpjMacros =
     this->GetCMakeInstance()->GetCacheDefinition("GHS_GPJ_MACROS");
   if (nullptr != ghsGpjMacros) {
@@ -465,13 +631,14 @@ void cmGlobalGhsMultiGenerator::WriteMacros(std::ostream& fout)
   }
 }
 
-void cmGlobalGhsMultiGenerator::WriteHighLevelDirectives(std::ostream& fout)
+void cmGlobalGhsMultiGenerator::WriteHighLevelDirectives(
+  cmLocalGenerator* root, std::ostream& fout)
 {
   /* set primary target */
   std::string tgt;
   const char* t =
     this->GetCMakeInstance()->GetCacheDefinition("GHS_PRIMARY_TARGET");
-  if (t) {
+  if (t && *t != '\0') {
     tgt = t;
     this->GetCMakeInstance()->MarkCliAsUsed("GHS_PRIMARY_TARGET");
   } else {
@@ -486,16 +653,20 @@ void cmGlobalGhsMultiGenerator::WriteHighLevelDirectives(std::ostream& fout)
   }
 
   fout << "primaryTarget=" << tgt << std::endl;
+  fout << "customization=" << root->GetBinaryDirectory()
+       << "/CMakeFiles/custom_rule.bod" << std::endl;
+  fout << "customization=" << root->GetBinaryDirectory()
+       << "/CMakeFiles/custom_target.bod" << std::endl;
 
   char const* const customization =
     this->GetCMakeInstance()->GetCacheDefinition("GHS_CUSTOMIZATION");
   if (nullptr != customization && strlen(customization) > 0) {
-    fout << "customization=" << trimQuotes(customization) << std::endl;
+    fout << "customization=" << this->TrimQuotes(customization) << std::endl;
     this->GetCMakeInstance()->MarkCliAsUsed("GHS_CUSTOMIZATION");
   }
 }
 
-std::string cmGlobalGhsMultiGenerator::trimQuotes(std::string const& str)
+std::string cmGlobalGhsMultiGenerator::TrimQuotes(std::string const& str)
 {
   std::string result;
   result.reserve(str.size());
@@ -528,3 +699,56 @@ cmGlobalGhsMultiGenerator::OrderedTargetDependSet::OrderedTargetDependSet(
 {
   this->insert(targets.begin(), targets.end());
 }
+
+bool cmGlobalGhsMultiGenerator::ComputeTargetBuildOrder(
+  cmGeneratorTarget const* tgt, std::vector<cmGeneratorTarget const*>& build)
+{
+  std::vector<cmGeneratorTarget const*> t{ tgt };
+  return ComputeTargetBuildOrder(t, build);
+}
+
+bool cmGlobalGhsMultiGenerator::ComputeTargetBuildOrder(
+  std::vector<cmGeneratorTarget const*>& tgt,
+  std::vector<cmGeneratorTarget const*>& build)
+{
+  std::set<cmGeneratorTarget const*> temp;
+  std::set<cmGeneratorTarget const*> perm;
+
+  for (auto ti : tgt) {
+    bool r = VisitTarget(temp, perm, build, ti);
+    if (r) {
+      return r;
+    }
+  }
+  return false;
+}
+
+bool cmGlobalGhsMultiGenerator::VisitTarget(
+  std::set<cmGeneratorTarget const*>& temp,
+  std::set<cmGeneratorTarget const*>& perm,
+  std::vector<cmGeneratorTarget const*>& order, cmGeneratorTarget const* ti)
+{
+  /* check if permanent mark is set*/
+  if (perm.find(ti) == perm.end()) {
+    /* set temporary mark; check if revisit*/
+    if (temp.insert(ti).second) {
+      /* sort targets lexicographically to ensure that nodes are always visited
+       * in the same order */
+      OrderedTargetDependSet sortedTargets(this->GetTargetDirectDepends(ti),
+                                           "");
+      for (auto& di : sortedTargets) {
+        if (this->VisitTarget(temp, perm, order, di)) {
+          return true;
+        }
+      }
+      /* mark as complete; insert into beginning of list*/
+      perm.insert(ti);
+      order.push_back(ti);
+      return false;
+    }
+    /* revisiting item - not a DAG */
+    return true;
+  }
+  /* already complete */
+  return false;
+}
diff --git a/Source/cmGlobalGhsMultiGenerator.h b/Source/cmGlobalGhsMultiGenerator.h
index 1aeb1dc..98358c7 100644
--- a/Source/cmGlobalGhsMultiGenerator.h
+++ b/Source/cmGlobalGhsMultiGenerator.h
@@ -78,23 +78,7 @@ public:
   // Write the common disclaimer text at the top of each build file.
   void WriteFileHeader(std::ostream& fout);
 
-  // Target dependency sorting
-  class TargetSet : public std::set<cmGeneratorTarget const*>
-  {
-  };
-  class TargetCompare
-  {
-    std::string First;
-
-  public:
-    TargetCompare(std::string first)
-      : First(std::move(first))
-    {
-    }
-    bool operator()(cmGeneratorTarget const* l,
-                    cmGeneratorTarget const* r) const;
-  };
-  class OrderedTargetDependSet;
+  const char* GetInstallTargetName() const override { return "install"; }
 
 protected:
   void Generate() override;
@@ -111,18 +95,53 @@ private:
   /* top-level project */
   void OutputTopLevelProject(cmLocalGenerator* root,
                              std::vector<cmLocalGenerator*>& generators);
-  void WriteTopLevelProject(std::ostream& fout, cmLocalGenerator* root,
-                            std::vector<cmLocalGenerator*>& generators);
-  void WriteMacros(std::ostream& fout);
-  void WriteHighLevelDirectives(std::ostream& fout);
-  void WriteSubProjects(std::ostream& fout, cmLocalGenerator* root,
-                        std::vector<cmLocalGenerator*>& generators);
-
-  std::string trimQuotes(std::string const& str);
+  void WriteTopLevelProject(std::ostream& fout, cmLocalGenerator* root);
+  void WriteMacros(std::ostream& fout, cmLocalGenerator* root);
+  void WriteHighLevelDirectives(cmLocalGenerator* root, std::ostream& fout);
+  void WriteSubProjects(std::ostream& fout, std::string& all_target);
+  void WriteTargets(cmLocalGenerator* root);
+  void WriteProjectLine(std::ostream& fout, cmGeneratorTarget const* target,
+                        cmLocalGenerator* root, std::string& rootBinaryDir);
+  void WriteCustomRuleBOD(std::ostream& fout);
+  void WriteCustomTargetBOD(std::ostream& fout);
+  void WriteAllTarget(cmLocalGenerator* root,
+                      std::vector<cmLocalGenerator*>& generators,
+                      std::string& all_target);
+
+  std::string TrimQuotes(std::string const& str);
 
   std::string OsDir;
   static const char* DEFAULT_BUILD_PROGRAM;
   static const char* DEFAULT_TOOLSET_ROOT;
+
+  bool ComputeTargetBuildOrder(cmGeneratorTarget const* tgt,
+                               std::vector<cmGeneratorTarget const*>& build);
+  bool ComputeTargetBuildOrder(std::vector<cmGeneratorTarget const*>& tgt,
+                               std::vector<cmGeneratorTarget const*>& build);
+  bool VisitTarget(std::set<cmGeneratorTarget const*>& temp,
+                   std::set<cmGeneratorTarget const*>& perm,
+                   std::vector<cmGeneratorTarget const*>& order,
+                   cmGeneratorTarget const* ti);
+
+  std::vector<cmGeneratorTarget const*> ProjectTargets;
+
+  // Target sorting
+  class TargetSet : public std::set<cmGeneratorTarget const*>
+  {
+  };
+  class TargetCompare
+  {
+    std::string First;
+
+  public:
+    TargetCompare(std::string first)
+      : First(std::move(first))
+    {
+    }
+    bool operator()(cmGeneratorTarget const* l,
+                    cmGeneratorTarget const* r) const;
+  };
+  class OrderedTargetDependSet;
 };
 
 class cmGlobalGhsMultiGenerator::OrderedTargetDependSet
diff --git a/Tests/CMakeLists.txt b/Tests/CMakeLists.txt
index 3746965..2e0902c 100644
--- a/Tests/CMakeLists.txt
+++ b/Tests/CMakeLists.txt
@@ -2336,7 +2336,7 @@ ${CMake_BINARY_DIR}/bin/cmake -DDIR=dev -P ${CMake_SOURCE_DIR}/Utilities/Release
     endmacro()
     macro(add_test_GhsMulti_rename_install test_name)
       add_test_GhsMulti( ${test_name} GhsMultiRenameInstall ${test_name}
-        "-DCMAKE_INSTALL_PREFIX=. -DRUN_TEST=${test_name}" ${CMAKE_CMAKE_COMMAND} -P ./cmake_install.cmake)
+        "-DCMAKE_INSTALL_PREFIX=. -DRUN_TEST=${test_name}" ${CMAKE_CMAKE_COMMAND} --build . --target install)
     endmacro()
     #unset ghs config variables
     unset(ghs_config_name)
@@ -2391,6 +2391,9 @@ ${CMake_BINARY_DIR}/bin/cmake -DDIR=dev -P ${CMake_SOURCE_DIR}/Utilities/Release
       add_test_GhsMulti(compiler_options_kernel GhsMultiCompilerOptions Kernel "-DRUN_TEST=KERNEL_FLAGS -DRUN_TEST_BUILD_TYPE=DEBUG")
       add_test_GhsMulti(try_compile_copy GhsMultiCopyFile "" "")
       add_test_GhsMulti(ghs_platform GhsMultiPlatform "" "")
+      add_test_GhsMulti(custom_target GhsMultiCustomTarget "" "")
+      add_test_GhsMulti(dep_order GhsMultiDepOrder "" "")
+      add_test_GhsMulti(external_project GhsMultiExternalProject "" "")
       list(APPEND TEST_BUILD_DIRS "${CMake_BINARY_DIR}/Tests/GhsMulti/${ghs_config_name}")
       #unset ghs config variables
       unset(ghs_config_name)
diff --git a/Tests/GhsMulti/GhsMultiCustomTarget/CMakeLists.txt b/Tests/GhsMulti/GhsMultiCustomTarget/CMakeLists.txt
new file mode 100644
index 0000000..93d668b
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiCustomTarget/CMakeLists.txt
@@ -0,0 +1,110 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
+
+project(test C)
+
+# Tests assume no previous builds in the build directory
+file(REMOVE_RECURSE ${CMAKE_CURRENT_BINARY_DIR}/build)
+
+macro (test_output)
+  if (BUILD_OUTPUT STREQUAL EXPECTED_LINES )
+    message("Build OK")
+  else()
+    message("BUILD_OUTPUT")
+    foreach(Line IN LISTS BUILD_OUTPUT)
+      message("${Line}")
+    endforeach()
+    message("EXPECTED_LINES")
+    foreach(Line IN LISTS EXPECTED_LINES)
+      message("${Line}")
+    endforeach()
+    message(SEND_ERROR "Build KO")
+  endif()
+endmacro()
+
+message("Copy project")
+configure_file(${CMAKE_CURRENT_SOURCE_DIR}/CMakeLists.txt.in
+  ${CMAKE_CURRENT_BINARY_DIR}/src/CMakeLists.txt COPYONLY)
+
+file(COPY ${CMAKE_CURRENT_SOURCE_DIR}/exe1.c
+          ${CMAKE_CURRENT_SOURCE_DIR}/lib1.c
+  DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/src
+)
+
+message("Building ALL target")
+try_compile(RESULT
+  ${CMAKE_CURRENT_BINARY_DIR}/build
+  ${CMAKE_CURRENT_BINARY_DIR}/src
+  test
+  CMAKE_FLAGS
+    -DCMAKE_EXE_LINKER_FLAGS=${CMAKE_EXE_LINKER_FLAGS}
+  OUTPUT_VARIABLE BUILD_OUTPUT)
+
+message("Output from build:\n${BUILD_OUTPUT}")
+
+#filter outputs
+string(REPLACE "\r" "" BUILD_OUTPUT "${BUILD_OUTPUT}")
+string(REPLACE "\n" ";" BUILD_OUTPUT "${BUILD_OUTPUT}")
+list(FILTER BUILD_OUTPUT INCLUDE REGEX "^.*CT:")
+
+unset(EXPECTED_LINES)
+list(APPEND EXPECTED_LINES "CT: Processing target_empty_prebuild")
+list(APPEND EXPECTED_LINES "CT: Processing target_empty_postbuild")
+list(APPEND EXPECTED_LINES "CT: Processing target_cmd")
+list(APPEND EXPECTED_LINES "CT: Processing target_cmd_prebuild")
+list(APPEND EXPECTED_LINES "CT: Processing target_cmd_postbuild")
+
+test_output()
+
+message("Building target_update_files target")
+try_compile(RESULT
+  ${CMAKE_CURRENT_BINARY_DIR}/build
+  ${CMAKE_CURRENT_BINARY_DIR}/src
+  test target_update_files
+  CMAKE_FLAGS
+    -DCMAKE_EXE_LINKER_FLAGS=${CMAKE_EXE_LINKER_FLAGS}
+  OUTPUT_VARIABLE BUILD_OUTPUT)
+
+message("Output from build:\n${BUILD_OUTPUT}")
+
+#filter outputs
+string(REPLACE "\r" "" BUILD_OUTPUT "${BUILD_OUTPUT}")
+string(REPLACE "\n" ";" BUILD_OUTPUT "${BUILD_OUTPUT}")
+list(FILTER BUILD_OUTPUT INCLUDE REGEX "^.*CT:")
+
+unset(EXPECTED_LINES)
+list(APPEND EXPECTED_LINES "CT: Processing target_empty_prebuild")
+list(APPEND EXPECTED_LINES "CT: Processing target_empty_postbuild")
+list(APPEND EXPECTED_LINES "CT: generate C file another_file")
+list(APPEND EXPECTED_LINES "CT: generate text file dependsA")
+list(APPEND EXPECTED_LINES "CT: generate text file out_of_order_dep")
+list(APPEND EXPECTED_LINES "CT: generate text files A, B, and C")
+list(APPEND EXPECTED_LINES "CT: Processing target_update_files")
+
+test_output()
+
+message("Rerun target_update_files target")
+try_compile(RESULT
+  ${CMAKE_CURRENT_BINARY_DIR}/build
+  ${CMAKE_CURRENT_BINARY_DIR}/src
+  test target_update_files
+  CMAKE_FLAGS
+    -DCMAKE_EXE_LINKER_FLAGS=${CMAKE_EXE_LINKER_FLAGS}
+  OUTPUT_VARIABLE BUILD_OUTPUT)
+
+message("Output from build:\n${BUILD_OUTPUT}")
+
+#filter outputs
+string(REPLACE "\r" "" BUILD_OUTPUT "${BUILD_OUTPUT}")
+string(REPLACE "\n" ";" BUILD_OUTPUT "${BUILD_OUTPUT}")
+list(FILTER BUILD_OUTPUT INCLUDE REGEX "^.*CT:")
+
+unset(EXPECTED_LINES)
+list(APPEND EXPECTED_LINES "CT: Processing target_empty_prebuild")
+list(APPEND EXPECTED_LINES "CT: Processing target_empty_postbuild")
+list(APPEND EXPECTED_LINES "CT: generate text files A, B, and C")
+list(APPEND EXPECTED_LINES "CT: Processing target_update_files")
+
+test_output()
diff --git a/Tests/GhsMulti/GhsMultiCustomTarget/CMakeLists.txt.in b/Tests/GhsMulti/GhsMultiCustomTarget/CMakeLists.txt.in
new file mode 100644
index 0000000..fed946c
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiCustomTarget/CMakeLists.txt.in
@@ -0,0 +1,108 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
+
+project(test C)
+
+if(CMAKE_C_COMPILER_ID STREQUAL "GHS")
+  add_link_options("-non_shared")
+endif()
+
+add_library(lib1 lib1.c)
+
+set(TEST_MISSING_TARGET_SRC 0)
+set(TEST_MISSING_TARGET_DEP 0)
+set(TEST_MISSING_DEP 0)
+set(TEST_DEP_CYCLE 0)
+
+add_executable(exe1 exe1.c)
+target_link_libraries(exe1 lib1)
+
+add_custom_target(target_cmd ALL
+  COMMAND ${CMAKE_COMMAND} -E echo "target_cmd" > target_cmd
+  COMMAND ${CMAKE_COMMAND} -E echo "target_cmd_extra" > target_cmd_extra.txt
+  BYPRODUCTS target_cmd target_cmd_extra.txt
+  COMMENT "CT: Processing target_cmd")
+
+add_custom_command(TARGET target_cmd PRE_BUILD
+  COMMAND ${CMAKE_COMMAND} -E echo "target_cmd_prebuild" > target_cmd_prebuild.txt
+  BYPRODUCTS target_cmd_prebuild.txt
+  COMMENT "CT: Processing target_cmd_prebuild")
+#event does not run for custom targets
+add_custom_command(TARGET target_cmd PRE_LINK
+  COMMAND ${CMAKE_COMMAND} -E echo "executing target_cmd_prelink commands"
+  COMMAND ${CMAKE_COMMAND} -E echo "target_cmd_prelink" > target_cmd_prelink.txt
+  BYPRODUCTS target_cmd_prelink.txt
+  COMMENT "CT: Processing target_cmd_prelink")
+add_custom_command(TARGET target_cmd POST_BUILD
+  COMMAND ${CMAKE_COMMAND} -E echo "executing target_cmd_postbuild commands"
+  COMMAND ${CMAKE_COMMAND} -E echo "target_cmd_postbuild" > target_cmd_postbuild.txt
+  BYPRODUCTS target_cmd_postbuild.txt
+  COMMENT "CT: Processing target_cmd_postbuild")
+
+add_custom_target(target_empty ALL
+  COMMENT "CT: Processing target_empty")
+
+add_custom_command(TARGET target_empty PRE_BUILD
+  COMMAND ${CMAKE_COMMAND} -E echo "target_empty_prebuild" > target_empty_prebuild.txt
+  BYPRODUCTS target_empty_prebuild.txt
+  COMMENT "CT: Processing target_empty_prebuild")
+add_custom_command(TARGET target_empty POST_BUILD
+  COMMAND ${CMAKE_COMMAND} -E echo "target_empty_postbuild" > target_empty_postbuild.txt
+  BYPRODUCTS target_empty_postbuild.txt
+  COMMENT "CT: Processing target_empty_postbuild")
+
+add_dependencies(target_cmd target_empty)
+
+add_custom_command(
+  OUTPUT out_of_order_dep.txt
+  COMMAND ${CMAKE_COMMAND} -E echo "out_of_order_dep" > out_of_order_dep.txt
+  COMMENT "CT: generate text file out_of_order_dep"
+  DEPENDS dependsA.txt
+)
+
+if(TEST_MISSING_TARGET_SRC)
+  set(SRC_FILE does_not_exist)
+endif()
+if(TEST_MISSING_TARGET_DEP)
+  set(DEP_FILE does_not_exist)
+endif()
+
+add_custom_target(target_update_files
+  DEPENDS genc_do_not_list.txt ${DEP_FILE}
+  SOURCES gena.txt genb.txt another_file.c ${SRC_FILE}
+  BYPRODUCTS junkit.txt
+  COMMAND ${CMAKE_COMMAND} -E copy another_file.c junkit.txt
+  COMMENT "CT: Processing target_update_files")
+
+add_custom_command(
+  OUTPUT force_rebuild gena.txt genb.txt genc_do_not_list.txt
+  COMMAND ${CMAKE_COMMAND} -E copy dependsA.txt gena.txt
+  COMMAND ${CMAKE_COMMAND} -E echo "genb" > genb.txt
+  COMMAND ${CMAKE_COMMAND} -E echo "genc" > genc_do_not_list.txt
+  DEPENDS out_of_order_dep.txt dependsA.txt
+  COMMENT "CT: generate text files A, B, and C"
+)
+
+if(TEST_MISSING_DEP)
+  set(MISSING_DEP MISSING_DEP)
+endif()
+if(TEST_DEP_CYCLE)
+  set(DEP_CYCLE out_of_order_dep.txt)
+endif()
+
+add_custom_command(
+  OUTPUT dependsA.txt
+  COMMAND ${CMAKE_COMMAND} -E echo "dependsA" > dependsA.txt
+  DEPENDS ${MISSING_DEP} ${DEP_CYCLE} another_file.c
+  COMMENT "CT: generate text file dependsA"
+)
+
+add_custom_command(
+  OUTPUT another_file.c
+  COMMAND ${CMAKE_COMMAND} -E echo "//auto-gen file" > another_file.c
+  COMMENT "CT: generate C file another_file"
+)
+
+add_dependencies(target_update_files target_empty)
diff --git a/Tests/GhsMulti/GhsMultiCustomTarget/exe1.c b/Tests/GhsMulti/GhsMultiCustomTarget/exe1.c
new file mode 100644
index 0000000..29ad70a
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiCustomTarget/exe1.c
@@ -0,0 +1,5 @@
+extern int func(void);
+int main(void)
+{
+  return func();
+}
diff --git a/Tests/GhsMulti/GhsMultiCustomTarget/lib1.c b/Tests/GhsMulti/GhsMultiCustomTarget/lib1.c
new file mode 100644
index 0000000..b35e9cc
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiCustomTarget/lib1.c
@@ -0,0 +1,4 @@
+int func(void)
+{
+  return 2;
+}
diff --git a/Tests/GhsMulti/GhsMultiDepOrder/CMakeLists.txt b/Tests/GhsMulti/GhsMultiDepOrder/CMakeLists.txt
new file mode 100644
index 0000000..2e2871b
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiDepOrder/CMakeLists.txt
@@ -0,0 +1,12 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
+
+project(test C)
+
+#set_property( GLOBAL PROPERTY GLOBAL_DEPENDS_DEBUG_MODE 1)
+add_subdirectory(exec)
+add_subdirectory(lib)
+add_subdirectory(protolib)
+add_dependencies(lib1 proto)
diff --git a/Tests/GhsMulti/GhsMultiDepOrder/exec/CMakeLists.txt b/Tests/GhsMulti/GhsMultiDepOrder/exec/CMakeLists.txt
new file mode 100644
index 0000000..85ee805
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiDepOrder/exec/CMakeLists.txt
@@ -0,0 +1,11 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
+
+add_executable(exe1 exe1.c)
+target_link_libraries(exe1 lib1)
+target_include_directories(exe1 PRIVATE "${test_BINARY_DIR}")
+if(CMAKE_C_COMPILER_ID STREQUAL "GHS")
+  target_link_options(exe1 PRIVATE "-non_shared")
+endif()
diff --git a/Tests/GhsMulti/GhsMultiDepOrder/exec/exe1.c b/Tests/GhsMulti/GhsMultiDepOrder/exec/exe1.c
new file mode 100644
index 0000000..fbf4ed4
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiDepOrder/exec/exe1.c
@@ -0,0 +1,8 @@
+#include "lib1.h"
+#include "p.h"
+
+int main(void)
+{
+  return func1() + func2() + func3() + func1p() + func2p() + func3p() +
+    PROTO1 + PROTO2 + PROTO3;
+}
diff --git a/Tests/GhsMulti/GhsMultiDepOrder/lib/CMakeLists.txt b/Tests/GhsMulti/GhsMultiDepOrder/lib/CMakeLists.txt
new file mode 100644
index 0000000..ae30fa2
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiDepOrder/lib/CMakeLists.txt
@@ -0,0 +1,17 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+add_library(lib1 STATIC
+  func1.c lib1.h
+  "${test_BINARY_DIR}/protolib/proto1.c"
+  "${test_BINARY_DIR}/protolib/proto1.h")
+set_source_files_properties(
+  "${test_BINARY_DIR}/protolib/proto1.c"
+  "${test_BINARY_DIR}/protolib/proto1.h"
+  PROPERTIES GENERATED 1)
+target_include_directories(lib1 PRIVATE "${test_BINARY_DIR}/protolib"
+  PUBLIC .)
+add_custom_command( TARGET lib1 POST_BUILD
+  COMMAND ${CMAKE_COMMAND} -E copy "${test_BINARY_DIR}/protolib/proto1.h" "${test_BINARY_DIR}/p.h"
+  COMMENT "Copy ${test_BINARY_DIR}/protolib/proto1.h ${test_BINARY_DIR}/p.h"
+  BYPRODUCTS "${test_BINARY_DIR}/p.h")
diff --git a/Tests/GhsMulti/GhsMultiDepOrder/lib/func1.c b/Tests/GhsMulti/GhsMultiDepOrder/lib/func1.c
new file mode 100644
index 0000000..53334fe
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiDepOrder/lib/func1.c
@@ -0,0 +1,17 @@
+#include "lib1.h"
+#include "proto1.h"
+
+int func1(void)
+{
+  return 1 + PROTO1;
+}
+
+int func2(void)
+{
+  return 2 + PROTO2;
+}
+
+int func3(void)
+{
+  return 3 + PROTO3;
+}
diff --git a/Tests/GhsMulti/GhsMultiDepOrder/lib/lib1.h b/Tests/GhsMulti/GhsMultiDepOrder/lib/lib1.h
new file mode 100644
index 0000000..5e99f02
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiDepOrder/lib/lib1.h
@@ -0,0 +1,3 @@
+extern int func1(void);
+extern int func2(void);
+extern int func3(void);
diff --git a/Tests/GhsMulti/GhsMultiDepOrder/protolib/CMakeLists.txt b/Tests/GhsMulti/GhsMultiDepOrder/protolib/CMakeLists.txt
new file mode 100644
index 0000000..8cb6869
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiDepOrder/protolib/CMakeLists.txt
@@ -0,0 +1,28 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
+
+add_custom_target(proto ALL
+  DEPENDS proto1.c
+          proto1.h
+  SOURCES
+          ${test_SOURCE_DIR}/protolib/proto1.c.in
+          ${test_SOURCE_DIR}/protolib/proto1.h.in
+  COMMENT "Creating proto files")
+
+add_custom_command(
+  OUTPUT proto1.c
+  COMMAND ${CMAKE_COMMAND} -E copy
+    ${test_SOURCE_DIR}/protolib/proto1.c.in proto1.c
+  DEPENDS ${test_SOURCE_DIR}/protolib/proto1.c.in
+  COMMENT "generate proto C files"
+)
+
+add_custom_command(
+  OUTPUT proto1.h
+  COMMAND ${CMAKE_COMMAND} -E copy
+    ${test_SOURCE_DIR}/protolib/proto1.h.in proto1.h
+  DEPENDS ${test_SOURCE_DIR}/protolib/proto1.h.in
+  COMMENT "generate proto H files"
+)
diff --git a/Tests/GhsMulti/GhsMultiDepOrder/protolib/proto1.c.in b/Tests/GhsMulti/GhsMultiDepOrder/protolib/proto1.c.in
new file mode 100644
index 0000000..0efb1bd
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiDepOrder/protolib/proto1.c.in
@@ -0,0 +1,16 @@
+#include "proto1.h"
+
+int func1p(void)
+{
+  return 1;
+}
+
+int func2p(void)
+{
+  return 2;
+}
+
+int func3p(void)
+{
+  return 3;
+}
diff --git a/Tests/GhsMulti/GhsMultiDepOrder/protolib/proto1.h.in b/Tests/GhsMulti/GhsMultiDepOrder/protolib/proto1.h.in
new file mode 100644
index 0000000..f2f93af
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiDepOrder/protolib/proto1.h.in
@@ -0,0 +1,7 @@
+extern int func1p(void);
+extern int func2p(void);
+extern int func3p(void);
+
+#define PROTO1 0x1
+#define PROTO2 0x2
+#define PROTO3 0x3
diff --git a/Tests/GhsMulti/GhsMultiExternalProject/CMakeLists.txt b/Tests/GhsMulti/GhsMultiExternalProject/CMakeLists.txt
new file mode 100644
index 0000000..24126c8
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiExternalProject/CMakeLists.txt
@@ -0,0 +1,14 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
+
+project(test C)
+include(ExternalProject)
+
+ExternalProject_Add(another_project
+  SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/empty
+  BINARY_DIR empty_build
+  INSTALL_COMMAND ""
+  TEST_COMMAND ""
+  )
diff --git a/Tests/GhsMulti/GhsMultiExternalProject/empty/CMakeLists.txt b/Tests/GhsMulti/GhsMultiExternalProject/empty/CMakeLists.txt
new file mode 100644
index 0000000..6846a98
--- /dev/null
+++ b/Tests/GhsMulti/GhsMultiExternalProject/empty/CMakeLists.txt
@@ -0,0 +1,8 @@
+# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
+# file Copyright.txt or https://cmake.org/licensing for details.
+
+cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
+
+project(empty NONE)
+
+message("EMPTY PROJECT")
diff --git a/Tests/GhsMulti/GhsMultiIntegrity/GhsMultiIntegrityDDInt/App/CMakeLists.txt b/Tests/GhsMulti/GhsMultiIntegrity/GhsMultiIntegrityDDInt/App/CMakeLists.txt
index e431217..3837b5a 100644
--- a/Tests/GhsMulti/GhsMultiIntegrity/GhsMultiIntegrityDDInt/App/CMakeLists.txt
+++ b/Tests/GhsMulti/GhsMultiIntegrity/GhsMultiIntegrityDDInt/App/CMakeLists.txt
@@ -1,4 +1,3 @@
 add_executable(App Main.c)
-target_include_directories(App PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/../Lib)
 target_link_libraries(App Lib)
 target_compile_options(App PUBLIC "-non_shared")
diff --git a/Tests/GhsMulti/GhsMultiIntegrity/GhsMultiIntegrityDDInt/Lib/CMakeLists.txt b/Tests/GhsMulti/GhsMultiIntegrity/GhsMultiIntegrityDDInt/Lib/CMakeLists.txt
index 00e0f59..bb9849a 100644
--- a/Tests/GhsMulti/GhsMultiIntegrity/GhsMultiIntegrityDDInt/Lib/CMakeLists.txt
+++ b/Tests/GhsMulti/GhsMultiIntegrity/GhsMultiIntegrityDDInt/Lib/CMakeLists.txt
@@ -1 +1,2 @@
 add_library(Lib HelperFun.c HelperFun.h)
+target_include_directories(Lib PUBLIC .)
diff --git a/Tests/GhsMulti/GhsMultiIntegrity/GhsMultiIntegrityMonolith/CMakeLists.txt b/Tests/GhsMulti/GhsMultiIntegrity/GhsMultiIntegrityMonolith/CMakeLists.txt
index c5db155..3f2f0eb 100644
--- a/Tests/GhsMulti/GhsMultiIntegrity/GhsMultiIntegrityMonolith/CMakeLists.txt
+++ b/Tests/GhsMulti/GhsMultiIntegrity/GhsMultiIntegrityMonolith/CMakeLists.txt
@@ -18,3 +18,4 @@ target_link_options(kernel PRIVATE -kernel)
 
 # create monolith INTEGRITY application
 add_executable(monolith test.int)
+add_dependencies(monolith vas)
diff --git a/Tests/GhsMulti/GhsMultiPlatform/file1.c b/Tests/GhsMulti/GhsMultiPlatform/file1.c
deleted file mode 100644
index 4132aa4..0000000
--- a/Tests/GhsMulti/GhsMultiPlatform/file1.c
+++ /dev/null
@@ -1,4 +0,0 @@
-int main(void)
-{
-  return -42;
-}
diff --git a/Tests/GhsMulti/GhsMultiRenameInstall/CMakeLists.txt b/Tests/GhsMulti/GhsMultiRenameInstall/CMakeLists.txt
index f5792b4..b2540d9 100644
--- a/Tests/GhsMulti/GhsMultiRenameInstall/CMakeLists.txt
+++ b/Tests/GhsMulti/GhsMultiRenameInstall/CMakeLists.txt
@@ -13,7 +13,7 @@ endif()
 
 if(RUN_TEST STREQUAL "SINGLE_EXEC")
   add_executable(exe1 exe.c)
-  set(targets_to_install ${targets_to_install} exe1)
+  set(targets_to_install exe1)
 endif()
 
 if(RUN_TEST STREQUAL "SINGLE_EXEC_RENAMED")
@@ -22,7 +22,7 @@ if(RUN_TEST STREQUAL "SINGLE_EXEC_RENAMED")
   set_property(TARGET exe1 PROPERTY RUNTIME_OUTPUT_DIRECTORY ${name}_bin_$<CONFIG>)
   set_property(TARGET exe1 PROPERTY OUTPUT_NAME ${name}_$<CONFIG>)
   set_property(TARGET exe1 PROPERTY SUFFIX .bin)
-  set(targets_to_install ${targets_to_install} exe1)
+  set(targets_to_install exe1)
 endif()
 
 if(RUN_TEST STREQUAL "EXEC_AND_LIB")
@@ -33,7 +33,7 @@ if(RUN_TEST STREQUAL "EXEC_AND_LIB")
 
  add_executable(exe1 exe1.c)
  target_link_libraries(exe1 lib1)
- set(targets_to_install ${targets_to_install} exe1 lib1)
+ set(targets_to_install exe1 lib1)
 endif()
 
 install(TARGETS ${targets_to_install}
diff --git a/Tests/GhsMulti/GhsMultiUnsupportedTargets/CMakeLists.txt b/Tests/GhsMulti/GhsMultiUnsupportedTargets/CMakeLists.txt
index ed3094b..f5f3c55 100644
--- a/Tests/GhsMulti/GhsMultiUnsupportedTargets/CMakeLists.txt
+++ b/Tests/GhsMulti/GhsMultiUnsupportedTargets/CMakeLists.txt
@@ -5,8 +5,6 @@ cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
 
 project(test C)
 
-add_custom_target(testTarget ALL echo this is a test)
-
 add_library(sharedLib SHARED file.c)
 
 add_library(moduleLib MODULE file.c)