Merge topic 'module-no-soname'

fdb3f87 Test NO_SONAME property (#13155)
e1409ac Support building shared libraries or modules without soname (#13155)

18 files changed, 161 insertions, 59 deletions

diff --git a/Modules/CMakeCInformation.cmake b/Modules/CMakeCInformation.cmake
index 6b5efba..afac7a4 100644
--- a/Modules/CMakeCInformation.cmake
+++ b/Modules/CMakeCInformation.cmake
@@ -164,7 +164,7 @@ INCLUDE(CMakeCommonLanguageInclude)
 # create a C shared library
 IF(NOT CMAKE_C_CREATE_SHARED_LIBRARY)
   SET(CMAKE_C_CREATE_SHARED_LIBRARY
-      "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_C_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
+      "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_C_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
 ENDIF(NOT CMAKE_C_CREATE_SHARED_LIBRARY)
 
 # create a C shared module just copy the shared library rule
diff --git a/Modules/CMakeCXXInformation.cmake b/Modules/CMakeCXXInformation.cmake
index 25abb8c..608b833 100644
--- a/Modules/CMakeCXXInformation.cmake
+++ b/Modules/CMakeCXXInformation.cmake
@@ -242,7 +242,7 @@ INCLUDE(CMakeCommonLanguageInclude)
 # create a shared C++ library
 IF(NOT CMAKE_CXX_CREATE_SHARED_LIBRARY)
   SET(CMAKE_CXX_CREATE_SHARED_LIBRARY
-      "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
+      "<CMAKE_CXX_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
 ENDIF(NOT CMAKE_CXX_CREATE_SHARED_LIBRARY)
 
 # create a c++ shared module copy the shared library rule by default
diff --git a/Modules/CMakeFortranInformation.cmake b/Modules/CMakeFortranInformation.cmake
index 76cf34e..2cbd7f8 100644
--- a/Modules/CMakeFortranInformation.cmake
+++ b/Modules/CMakeFortranInformation.cmake
@@ -171,7 +171,7 @@ INCLUDE(CMakeCommonLanguageInclude)
 # create a Fortran shared library
 IF(NOT CMAKE_Fortran_CREATE_SHARED_LIBRARY)
   SET(CMAKE_Fortran_CREATE_SHARED_LIBRARY
-      "<CMAKE_Fortran_COMPILER> <CMAKE_SHARED_LIBRARY_Fortran_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_Fortran_FLAGS> <CMAKE_SHARED_LIBRARY_SONAME_Fortran_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
+      "<CMAKE_Fortran_COMPILER> <CMAKE_SHARED_LIBRARY_Fortran_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_Fortran_FLAGS> <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
 ENDIF(NOT CMAKE_Fortran_CREATE_SHARED_LIBRARY)
 
 # create a Fortran shared module just copy the shared library rule
diff --git a/Modules/Compiler/XL.cmake b/Modules/Compiler/XL.cmake
index d2567d5..d293610 100644
--- a/Modules/Compiler/XL.cmake
+++ b/Modules/Compiler/XL.cmake
@@ -47,7 +47,7 @@ macro(__compiler_xl lang)
     # files so that we export only the symbols actually provided by the sources.
     set(CMAKE_${lang}_CREATE_SHARED_LIBRARY
       "${CMAKE_XL_CreateExportList} <OBJECT_DIR>/objects.exp <OBJECTS>"
-      "<CMAKE_${lang}_COMPILER> <CMAKE_SHARED_LIBRARY_${lang}_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS> -Wl,-bE:<OBJECT_DIR>/objects.exp <CMAKE_SHARED_LIBRARY_SONAME_${lang}_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>"
+      "<CMAKE_${lang}_COMPILER> <CMAKE_SHARED_LIBRARY_${lang}_FLAGS> <LANGUAGE_COMPILE_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_${lang}_FLAGS> -Wl,-bE:<OBJECT_DIR>/objects.exp <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>"
       )
   endif()
 endmacro()
diff --git a/Modules/Platform/Darwin-icc.cmake b/Modules/Platform/Darwin-icc.cmake
index b62036c..e675c0e 100644
--- a/Modules/Platform/Darwin-icc.cmake
+++ b/Modules/Platform/Darwin-icc.cmake
@@ -84,11 +84,11 @@ ENDIF(XCODE)
 SET(CMAKE_MacOSX_Content_COMPILE_OBJECT "\"${CMAKE_COMMAND}\" -E copy_if_different <SOURCE> <OBJECT>")
 
 SET(CMAKE_C_CREATE_SHARED_LIBRARY
-  "<CMAKE_C_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <LINK_FLAGS> -o <TARGET> -install_name <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
+  "<CMAKE_C_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
 SET(CMAKE_CXX_CREATE_SHARED_LIBRARY
-  "<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <LINK_FLAGS> -o <TARGET> -install_name <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
+  "<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
 SET(CMAKE_Fortran_CREATE_SHARED_LIBRARY
-  "<CMAKE_Fortran_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_Fortran_FLAGS> <LINK_FLAGS> -o <TARGET> -install_name <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
+  "<CMAKE_Fortran_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_Fortran_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
 
 SET(CMAKE_CXX_CREATE_SHARED_MODULE
       "<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS> <LINK_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
diff --git a/Modules/Platform/Darwin.cmake b/Modules/Platform/Darwin.cmake
index f9d37c3..a19bfe7 100644
--- a/Modules/Platform/Darwin.cmake
+++ b/Modules/Platform/Darwin.cmake
@@ -207,11 +207,11 @@ ENDIF()
 SET(CMAKE_C_CREATE_SHARED_LIBRARY_FORBIDDEN_FLAGS -w)
 SET(CMAKE_CXX_CREATE_SHARED_LIBRARY_FORBIDDEN_FLAGS -w)
 SET(CMAKE_C_CREATE_SHARED_LIBRARY
-  "<CMAKE_C_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <LINK_FLAGS> -o <TARGET> -install_name <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
+  "<CMAKE_C_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
 SET(CMAKE_CXX_CREATE_SHARED_LIBRARY
-  "<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <LINK_FLAGS> -o <TARGET> -install_name <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
+  "<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
 SET(CMAKE_Fortran_CREATE_SHARED_LIBRARY
-  "<CMAKE_Fortran_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_Fortran_FLAGS> <LINK_FLAGS> -o <TARGET> -install_name <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
+  "<CMAKE_Fortran_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_Fortran_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
 
 SET(CMAKE_CXX_CREATE_SHARED_MODULE
       "<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS> <LINK_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
@@ -223,9 +223,9 @@ SET(CMAKE_Fortran_CREATE_SHARED_MODULE
       "<CMAKE_Fortran_COMPILER>  <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_MODULE_CREATE_Fortran_FLAGS> <LINK_FLAGS> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
 
 SET(CMAKE_C_CREATE_MACOSX_FRAMEWORK
-      "<CMAKE_C_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <LINK_FLAGS> -o <TARGET> -install_name <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
+      "<CMAKE_C_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
 SET(CMAKE_CXX_CREATE_MACOSX_FRAMEWORK
-      "<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <LINK_FLAGS> -o <TARGET> -install_name <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
+      "<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <LINK_FLAGS> -o <TARGET> <SONAME_FLAG> <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS> <LINK_LIBRARIES>")
 
 
  
diff --git a/Modules/Platform/SunOS.cmake b/Modules/Platform/SunOS.cmake
index 9f2ee2e..2291c34 100644
--- a/Modules/Platform/SunOS.cmake
+++ b/Modules/Platform/SunOS.cmake
@@ -8,7 +8,7 @@ ENDIF(CMAKE_SYSTEM MATCHES "SunOS-4.*")
 IF(CMAKE_COMPILER_IS_GNUCXX)
   IF(CMAKE_COMPILER_IS_GNUCC)
     SET(CMAKE_CXX_CREATE_SHARED_LIBRARY
-        "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS>  <CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
+        "<CMAKE_C_COMPILER> <CMAKE_SHARED_LIBRARY_CXX_FLAGS> <LINK_FLAGS> <CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS>  <SONAME_FLAG><TARGET_SONAME> -o <TARGET> <OBJECTS> <LINK_LIBRARIES>")
   ELSE(CMAKE_COMPILER_IS_GNUCC)
     # Take default rule from CMakeDefaultMakeRuleVariables.cmake.
   ENDIF(CMAKE_COMPILER_IS_GNUCC)
diff --git a/Source/cmExportFileGenerator.cxx b/Source/cmExportFileGenerator.cxx
index c4f5dfb..eb19df5e 100644
--- a/Source/cmExportFileGenerator.cxx
+++ b/Source/cmExportFileGenerator.cxx
@@ -137,10 +137,20 @@ cmExportFileGenerator
       (mf->IsOn("WIN32") || mf->IsOn("CYGWIN") || mf->IsOn("MINGW"));
     if(!dll_platform)
       {
-      std::string soname = target->GetSOName(config);
-      std::string prop = "IMPORTED_SONAME";
+      std::string prop;
+      std::string value;
+      if(target->HasSOName(config))
+        {
+        prop = "IMPORTED_SONAME";
+        value = target->GetSOName(config);
+        }
+      else
+        {
+        prop = "IMPORTED_NO_SONAME";
+        value = "TRUE";
+        }
       prop += suffix;
-      properties[prop] = soname;
+      properties[prop] = value;
       }
     }
 
diff --git a/Source/cmLocalGenerator.cxx b/Source/cmLocalGenerator.cxx
index 13ede5d..6362d80 100644
--- a/Source/cmLocalGenerator.cxx
+++ b/Source/cmLocalGenerator.cxx
@@ -954,29 +954,27 @@ cmLocalGenerator::ExpandRuleVariable(std::string const& variable,
         }
       }
     }
-  if(replaceValues.TargetSOName)
+  if(variable == "TARGET_SONAME" || variable == "SONAME_FLAG" ||
+     variable == "TARGET_INSTALLNAME_DIR")
     {
-    if(variable == "TARGET_SONAME")
+    // All these variables depend on TargetSOName
+    if(replaceValues.TargetSOName)
       {
-      if(replaceValues.Language)
+      if(variable == "TARGET_SONAME")
         {
-        std::string name = "CMAKE_SHARED_LIBRARY_SONAME_";
-        name += replaceValues.Language;
-        name += "_FLAG";
-        if(this->Makefile->GetDefinition(name.c_str()))
-          {
-          return replaceValues.TargetSOName;
-          }
+        return replaceValues.TargetSOName;
+        }
+      if(variable == "SONAME_FLAG" && replaceValues.SONameFlag)
+        {
+        return replaceValues.SONameFlag;
+        }
+      if(replaceValues.TargetInstallNameDir &&
+         variable == "TARGET_INSTALLNAME_DIR")
+        {
+        return replaceValues.TargetInstallNameDir;
         }
-      return "";
-      }
-    }
-  if(replaceValues.TargetInstallNameDir)
-    {
-    if(variable == "TARGET_INSTALLNAME_DIR")
-      {
-      return replaceValues.TargetInstallNameDir;
       }
+    return "";
     }
   if(replaceValues.LinkLibraries)
     {
diff --git a/Source/cmLocalGenerator.h b/Source/cmLocalGenerator.h
index 3e93819..cb84a30 100644
--- a/Source/cmLocalGenerator.h
+++ b/Source/cmLocalGenerator.h
@@ -228,6 +228,7 @@ public:
     const char* ObjectDir;
     const char* Flags;
     const char* ObjectsQuoted;
+    const char* SONameFlag;
     const char* TargetSOName;
     const char* TargetInstallNameDir;
     const char* LinkFlags;
diff --git a/Source/cmMakefile.cxx b/Source/cmMakefile.cxx
index 17bb5ed..0a709ae 100644
--- a/Source/cmMakefile.cxx
+++ b/Source/cmMakefile.cxx
@@ -2195,6 +2195,14 @@ bool cmMakefile::PlatformIs64Bit() const
   return false;
 }
 
+const char* cmMakefile::GetSONameFlag(const char* language) const
+{
+  std::string name = "CMAKE_SHARED_LIBRARY_SONAME_";
+  name += language;
+  name += "_FLAG";
+  return GetDefinition(name.c_str());
+}
+
 bool cmMakefile::CanIWriteThisFile(const char* fileName)
 {
   if ( !this->IsOn("CMAKE_DISABLE_SOURCE_CHANGES") )
diff --git a/Source/cmMakefile.h b/Source/cmMakefile.h
index 8b3bef7..9fc64d6 100644
--- a/Source/cmMakefile.h
+++ b/Source/cmMakefile.h
@@ -595,6 +595,9 @@ public:
   /** Return whether the target platform is 64-bit.  */
   bool PlatformIs64Bit() const;
 
+  /** Retrieve soname flag for the specified language if supported */
+  const char* GetSONameFlag(const char* language) const;
+
   /**
    * Get a list of preprocessor define flags.
    */
diff --git a/Source/cmMakefileLibraryTargetGenerator.cxx b/Source/cmMakefileLibraryTargetGenerator.cxx
index 38aa59d..db59ffd 100644
--- a/Source/cmMakefileLibraryTargetGenerator.cxx
+++ b/Source/cmMakefileLibraryTargetGenerator.cxx
@@ -714,7 +714,11 @@ void cmMakefileLibraryTargetGenerator::WriteLibraryRules
   std::string linkString = linklibs.str();
   vars.LinkLibraries = linkString.c_str();
   vars.ObjectsQuoted = buildObjs.c_str();
-  vars.TargetSOName= targetNameSO.c_str();
+  if (this->Target->HasSOName(this->ConfigName))
+    {
+    vars.SONameFlag = this->Makefile->GetSONameFlag(linkLanguage);
+    vars.TargetSOName= targetNameSO.c_str();
+    }
   vars.LinkFlags = linkFlags.c_str();
 
   // Compute the directory portion of the install_name setting.
diff --git a/Source/cmNinjaNormalTargetGenerator.cxx b/Source/cmNinjaNormalTargetGenerator.cxx
index cf2b427..63ba58d 100644
--- a/Source/cmNinjaNormalTargetGenerator.cxx
+++ b/Source/cmNinjaNormalTargetGenerator.cxx
@@ -166,6 +166,7 @@ cmNinjaNormalTargetGenerator
                                                 cmLocalGenerator::SHELL);
     vars.ObjectDir = objdir.c_str();
     vars.Target = "$out";
+    vars.SONameFlag = "$SONAME_FLAG";
     vars.TargetSOName = "$SONAME";
     vars.TargetInstallNameDir = "$INSTALLNAME_DIR";
     vars.TargetPDB = "$TARGET_PDB";
@@ -380,17 +381,20 @@ void cmNinjaNormalTargetGenerator::WriteLinkStatement()
                              this->GetTarget(),
                              this->TargetLinkLanguage,
                              this->GetConfigName());
-  vars["SONAME"] = this->TargetNameSO;
-
-  if (targetType == cmTarget::SHARED_LIBRARY) {
-    std::string install_name_dir =
-      this->GetTarget()->GetInstallNameDirForBuildTree(this->GetConfigName());
-
-    if (!install_name_dir.empty()) {
-      vars["INSTALLNAME_DIR"] =
-        this->GetLocalGenerator()->Convert(install_name_dir.c_str(),
-            cmLocalGenerator::NONE,
-            cmLocalGenerator::SHELL, false);
+  if (this->GetTarget()->HasSOName(this->GetConfigName())) {
+    vars["SONAME_FLAG"] =
+      this->GetMakefile()->GetSONameFlag(this->TargetLinkLanguage);
+    vars["SONAME"] = this->TargetNameSO;
+    if (targetType == cmTarget::SHARED_LIBRARY) {
+      std::string install_name_dir = this->GetTarget()
+        ->GetInstallNameDirForBuildTree(this->GetConfigName());
+
+      if (!install_name_dir.empty()) {
+        vars["INSTALLNAME_DIR"] =
+          this->GetLocalGenerator()->Convert(install_name_dir.c_str(),
+              cmLocalGenerator::NONE,
+              cmLocalGenerator::SHELL, false);
+      }
     }
   }
 
diff --git a/Source/cmTarget.cxx b/Source/cmTarget.cxx
index cfa9976..4789197 100644
--- a/Source/cmTarget.cxx
+++ b/Source/cmTarget.cxx
@@ -823,6 +823,19 @@ void cmTarget::DefineProperties(cmake *cm)
      "CMAKE_SKIP_BUILD_RPATH if it is set when a target is created.");
 
   cm->DefineProperty
+    ("NO_SONAME", cmProperty::TARGET,
+     "Whether to set \"soname\" when linking a shared library or module.",
+     "Enable this boolean property if a generated shared library or module "
+     "should not have \"soname\" set. Default is to set \"soname\" on all "
+     "shared libraries and modules as long as the platform supports it. "
+     "Generally, use this property only for leaf private libraries or "
+     "plugins. If you use it on normal shared libraries which other targets "
+     "link against, on some platforms a linker will insert a full path to "
+     "the library (as specified at link time) into the dynamic section of "
+     "the dependant binary. Therefore, once installed, dynamic linker may "
+     "eventually fail to locate the library for the binary.");
+
+  cm->DefineProperty
     ("SOVERSION", cmProperty::TARGET,
      "What version number is this target.",
      "For shared libraries VERSION and SOVERSION can be used to specify "
@@ -831,6 +844,7 @@ void cmTarget::DefineProperties(cmake *cm)
      "supports symlinks and the linker supports so-names. "
      "If only one of both is specified the missing is assumed to have "
      "the same version number. "
+     "SOVERSION is ignored if NO_SONAME property is set. "
      "For shared libraries and executables on Windows the VERSION "
      "attribute is parsed to extract a \"major.minor\" version number. "
      "These numbers are used as the image version of the binary. ");
@@ -2995,6 +3009,17 @@ std::string cmTarget::GetPDBName(const char* config)
 }
 
 //----------------------------------------------------------------------------
+bool cmTarget::HasSOName(const char* config)
+{
+  // soname is supported only for shared libraries and modules,
+  // and then only when the platform supports an soname flag.
+  return ((this->GetType() == cmTarget::SHARED_LIBRARY ||
+           this->GetType() == cmTarget::MODULE_LIBRARY) &&
+          !this->GetPropertyAsBool("NO_SONAME") &&
+          this->Makefile->GetSONameFlag(this->GetLinkerLanguage(config)));
+}
+
+//----------------------------------------------------------------------------
 std::string cmTarget::GetSOName(const char* config)
 {
   if(this->IsImported())
@@ -3327,22 +3352,10 @@ void cmTarget::GetLibraryNames(std::string& name,
     return;
     }
 
-  // Construct the name of the soname flag variable for this language.
-  const char* ll = this->GetLinkerLanguage(config);
-  std::string sonameFlag = "CMAKE_SHARED_LIBRARY_SONAME";
-  if(ll)
-    {
-    sonameFlag += "_";
-    sonameFlag += ll;
-    }
-  sonameFlag += "_FLAG";
-
   // Check for library version properties.
   const char* version = this->GetProperty("VERSION");
   const char* soversion = this->GetProperty("SOVERSION");
-  if((this->GetType() != cmTarget::SHARED_LIBRARY &&
-      this->GetType() != cmTarget::MODULE_LIBRARY) ||
-     !this->Makefile->GetDefinition(sonameFlag.c_str()) ||
+  if(!this->HasSOName(config) ||
      this->IsFrameworkOnApple())
     {
     // Versioning is supported only for shared libraries and modules,
diff --git a/Source/cmTarget.h b/Source/cmTarget.h
index d41c827..d70cacd 100644
--- a/Source/cmTarget.h
+++ b/Source/cmTarget.h
@@ -347,6 +347,9 @@ public:
   /** Get the name of the pdb file for the target.  */
   std::string GetPDBName(const char* config=0);
 
+  /** Whether this library has soname enabled and platform supports it.  */
+  bool HasSOName(const char* config);
+
   /** Get the soname of the target.  Allowed only for a shared library.  */
   std::string GetSOName(const char* config);
 
diff --git a/Tests/Plugin/CMakeLists.txt b/Tests/Plugin/CMakeLists.txt
index b0942c0..31ca59c 100644
--- a/Tests/Plugin/CMakeLists.txt
+++ b/Tests/Plugin/CMakeLists.txt
@@ -39,6 +39,50 @@ TARGET_LINK_LIBRARIES(example_exe kwsys)
 ADD_LIBRARY(example_mod_1 MODULE src/example_mod_1.c)
 TARGET_LINK_LIBRARIES(example_mod_1 example_exe)
 
+
+IF(CMAKE_SHARED_LIBRARY_SONAME_C_FLAG AND
+    "${CMAKE_C_CREATE_SHARED_MODULE}" MATCHES "SONAME_FLAG")
+  # Add a second plugin that should not have any soname.
+  ADD_LIBRARY(example_mod_2 MODULE src/example_mod_1.c)
+  TARGET_LINK_LIBRARIES(example_mod_2 example_exe)
+  SET_PROPERTY(TARGET example_mod_2 PROPERTY NO_SONAME 1)
+
+  # Verify that targets export with proper IMPORTED SONAME properties.
+  EXPORT(TARGETS example_mod_1 example_mod_2 NAMESPACE exp_
+    FILE ${CMAKE_CURRENT_BINARY_DIR}/mods.cmake)
+  INCLUDE(${CMAKE_CURRENT_BINARY_DIR}/mods.cmake)
+  GET_PROPERTY(configs TARGET exp_example_mod_1 PROPERTY IMPORTED_CONFIGURATIONS)
+  FOREACH(c ${configs})
+    STRING(TOUPPER "${c}" CONFIG)
+    GET_PROPERTY(soname1 TARGET exp_example_mod_1 PROPERTY IMPORTED_SONAME_${CONFIG})
+    GET_PROPERTY(soname2 TARGET exp_example_mod_2 PROPERTY IMPORTED_NO_SONAME_${CONFIG})
+    IF(soname1)
+      MESSAGE(STATUS "exp_example_mod_1 has IMPORTED_SONAME_${CONFIG} as expected: ${soname1}")
+    ELSE()
+      MESSAGE(SEND_ERROR "exp_example_mod_1 does not have IMPORTED_SONAME_${CONFIG} but should")
+    ENDIF()
+    IF(soname2)
+      MESSAGE(STATUS "exp_example_mod_2 has IMPORTED_NO_SONAME_${CONFIG} as expected: ${soname2}")
+    ELSE()
+      MESSAGE(SEND_ERROR "exp_example_mod_2 does not have IMPORTED_NO_SONAME_${CONFIG} but should")
+    ENDIF()
+  ENDFOREACH()
+
+  # Parse the binary to check for SONAME if possible.
+  IF("${CMAKE_EXECUTABLE_FORMAT}" MATCHES "ELF")
+    FIND_PROGRAM(READELF_EXE readelf)
+    IF(READELF_EXE)
+      ADD_CUSTOM_TARGET(check_mod_soname ALL COMMAND
+        ${CMAKE_COMMAND} -Dreadelf=${READELF_EXE}
+                         -Dmod1=$<TARGET_FILE:example_mod_1>
+                         -Dmod2=$<TARGET_FILE:example_mod_2>
+        -P ${CMAKE_CURRENT_SOURCE_DIR}/check_mod_soname.cmake
+        )
+      ADD_DEPENDENCIES(check_mod_soname example_mod_1 example_mod_2)
+    ENDIF()
+  ENDIF()
+ENDIF()
+
 # TODO:
 #  - create a plugin that links to a static lib
 #  - create a plugin that links to a shared lib
diff --git a/Tests/Plugin/check_mod_soname.cmake b/Tests/Plugin/check_mod_soname.cmake
new file mode 100644
index 0000000..3737b45
--- /dev/null
+++ b/Tests/Plugin/check_mod_soname.cmake
@@ -0,0 +1,14 @@
+execute_process(COMMAND ${readelf} -d ${mod1} OUTPUT_FILE ${mod1}.readelf.txt)
+execute_process(COMMAND ${readelf} -d ${mod2} OUTPUT_FILE ${mod2}.readelf.txt)
+file(STRINGS ${mod1}.readelf.txt soname1 REGEX "\\(SONAME\\)")
+file(STRINGS ${mod2}.readelf.txt soname2 REGEX "\\(SONAME\\)")
+if(soname1)
+  message(STATUS "${mod1} has soname as expected: ${soname1}")
+else()
+  message(FATAL_ERROR "${mod1} has no soname but should:\n  ${soname1}")
+endif()
+if(soname2)
+  message(FATAL_ERROR "${mod2} has soname but should not:\n  ${soname2}")
+else()
+  message(STATUS "${mod2} has no soname as expected")
+endif()