Find: Provide global controls for the `NO_[]_PATH` call options

38 files changed, 374 insertions, 21 deletions

diff --git a/Help/command/FIND_XXX.txt b/Help/command/FIND_XXX.txt
index dde4dbb..fc8c55e 100644
--- a/Help/command/FIND_XXX.txt
+++ b/Help/command/FIND_XXX.txt
@@ -89,7 +89,8 @@ If ``NO_DEFAULT_PATH`` is not specified, the search process is as follows:
    searched after paths from the current module,
    i.e. ``<CurrentPackage>_ROOT``, ``ENV{<CurrentPackage>_ROOT}``,
    ``<ParentPackage>_ROOT``, ``ENV{<ParentPackage>_ROOT}``, etc.
-   This can be skipped if ``NO_PACKAGE_ROOT_PATH`` is passed.
+   This can be skipped if ``NO_PACKAGE_ROOT_PATH`` is passed or by setting
+   the :variable:`CMAKE_FIND_USE_PACAKGE_ROOT_PATH` to ``FALSE``.
    See policy :policy:`CMP0074`.
 
    * |FIND_PACKAGE_ROOT_PREFIX_PATH_XXX|
@@ -97,7 +98,8 @@ If ``NO_DEFAULT_PATH`` is not specified, the search process is as follows:
 2. Search paths specified in cmake-specific cache variables.
    These are intended to be used on the command line with a ``-DVAR=value``.
    The values are interpreted as :ref:`semicolon-separated lists <CMake Language Lists>`.
-   This can be skipped if ``NO_CMAKE_PATH`` is passed.
+   This can be skipped if ``NO_CMAKE_PATH`` is passed or by setting the
+   :variable:`CMAKE_FIND_USE_CMAKE_PATH` to ``FALSE``.
 
    * |CMAKE_PREFIX_PATH_XXX|
    * |CMAKE_XXX_PATH|
@@ -107,7 +109,8 @@ If ``NO_DEFAULT_PATH`` is not specified, the search process is as follows:
    These are intended to be set in the user's shell configuration,
    and therefore use the host's native path separator
    (``;`` on Windows and ``:`` on UNIX).
-   This can be skipped if ``NO_CMAKE_ENVIRONMENT_PATH`` is passed.
+   This can be skipped if ``NO_CMAKE_ENVIRONMENT_PATH`` is passed or
+   by setting the :variable:`CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH` to ``FALSE``.
 
    * |CMAKE_PREFIX_PATH_XXX|
    * |CMAKE_XXX_PATH|
@@ -119,13 +122,16 @@ If ``NO_DEFAULT_PATH`` is not specified, the search process is as follows:
    Hard-coded guesses should be specified with the ``PATHS`` option.
 
 5. Search the standard system environment variables.
-   This can be skipped if ``NO_SYSTEM_ENVIRONMENT_PATH`` is an argument.
+   This can be skipped if ``NO_SYSTEM_ENVIRONMENT_PATH`` is passed or by
+   setting the :variable:`CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH` to ``FALSE``.
 
    * |SYSTEM_ENVIRONMENT_PATH_XXX|
+   * |SYSTEM_ENVIRONMENT_PATH_WINDOWS_XXX|
 
 6. Search cmake variables defined in the Platform files
    for the current system.  This can be skipped if ``NO_CMAKE_SYSTEM_PATH``
-   is passed.
+   is passed or by setting the :variable:`CMAKE_FIND_USE_CMAKE_SYSTEM_PATH`
+   to ``FALSE``.
 
    * |CMAKE_SYSTEM_PREFIX_PATH_XXX|
    * |CMAKE_SYSTEM_XXX_PATH|
diff --git a/Help/command/find_file.rst b/Help/command/find_file.rst
index 2a14ad7..3f03f37 100644
--- a/Help/command/find_file.rst
+++ b/Help/command/find_file.rst
@@ -17,11 +17,10 @@ find_file
 .. |CMAKE_XXX_PATH| replace:: :variable:`CMAKE_INCLUDE_PATH`
 .. |CMAKE_XXX_MAC_PATH| replace:: :variable:`CMAKE_FRAMEWORK_PATH`
 
-.. |SYSTEM_ENVIRONMENT_PATH_XXX| replace:: Directories in ``INCLUDE``.
-   On Windows hosts:
-   ``<prefix>/include/<arch>`` if :variable:`CMAKE_LIBRARY_ARCHITECTURE`
-   is set, and |SYSTEM_ENVIRONMENT_PREFIX_PATH_XXX_SUBDIR|, and the
-   directories in ``PATH`` itself.
+.. |SYSTEM_ENVIRONMENT_PATH_XXX| replace:: The directories in ``PATH`` and ``INCLUDE``.
+.. |SYSTEM_ENVIRONMENT_PATH_WINDOWS_XXX| replace:: On Windows hosts:
+      ``<prefix>/include/<arch>`` if :variable:`CMAKE_LIBRARY_ARCHITECTURE`
+      is set, and |SYSTEM_ENVIRONMENT_PREFIX_PATH_XXX_SUBDIR|.
 
 .. |CMAKE_SYSTEM_PREFIX_PATH_XXX| replace::
    ``<prefix>/include/<arch>`` if :variable:`CMAKE_LIBRARY_ARCHITECTURE`
diff --git a/Help/command/find_library.rst b/Help/command/find_library.rst
index 0861d67..8a55aca 100644
--- a/Help/command/find_library.rst
+++ b/Help/command/find_library.rst
@@ -17,11 +17,10 @@ find_library
 .. |CMAKE_XXX_PATH| replace:: :variable:`CMAKE_LIBRARY_PATH`
 .. |CMAKE_XXX_MAC_PATH| replace:: :variable:`CMAKE_FRAMEWORK_PATH`
 
-.. |SYSTEM_ENVIRONMENT_PATH_XXX| replace:: Directories in ``LIB``.
-   On Windows hosts:
-   ``<prefix>/lib/<arch>`` if :variable:`CMAKE_LIBRARY_ARCHITECTURE` is set,
-   and |SYSTEM_ENVIRONMENT_PREFIX_PATH_XXX_SUBDIR|,
-   and the directories in ``PATH`` itself.
+.. |SYSTEM_ENVIRONMENT_PATH_XXX| replace:: The directories in ``PATH`` and ``INCLUDE``.
+.. |SYSTEM_ENVIRONMENT_PATH_WINDOWS_XXX| replace:: On Windows hosts:
+      ``<prefix>/lib/<arch>`` if :variable:`CMAKE_LIBRARY_ARCHITECTURE`
+      is set, and |SYSTEM_ENVIRONMENT_PREFIX_PATH_XXX_SUBDIR|.
 
 .. |CMAKE_SYSTEM_PREFIX_PATH_XXX| replace::
    ``<prefix>/lib/<arch>`` if :variable:`CMAKE_LIBRARY_ARCHITECTURE` is set,
diff --git a/Help/command/find_path.rst b/Help/command/find_path.rst
index 988a3fa..52ffe3c 100644
--- a/Help/command/find_path.rst
+++ b/Help/command/find_path.rst
@@ -17,11 +17,10 @@ find_path
 .. |CMAKE_XXX_PATH| replace:: :variable:`CMAKE_INCLUDE_PATH`
 .. |CMAKE_XXX_MAC_PATH| replace:: :variable:`CMAKE_FRAMEWORK_PATH`
 
-.. |SYSTEM_ENVIRONMENT_PATH_XXX| replace:: Directories in ``INCLUDE``.
-   On Windows hosts:
-   ``<prefix>/include/<arch>`` if :variable:`CMAKE_LIBRARY_ARCHITECTURE`
-   is set, and |SYSTEM_ENVIRONMENT_PREFIX_PATH_XXX_SUBDIR|, and the
-   directories in ``PATH`` itself.
+.. |SYSTEM_ENVIRONMENT_PATH_XXX| replace:: The directories in ``PATH`` and ``INCLUDE``.
+.. |SYSTEM_ENVIRONMENT_PATH_WINDOWS_XXX| replace:: On Windows hosts:
+      ``<prefix>/include/<arch>`` if :variable:`CMAKE_LIBRARY_ARCHITECTURE`
+      is set, and |SYSTEM_ENVIRONMENT_PREFIX_PATH_XXX_SUBDIR|.
 
 .. |CMAKE_SYSTEM_PREFIX_PATH_XXX| replace::
    ``<prefix>/include/<arch>`` if :variable:`CMAKE_LIBRARY_ARCHITECTURE`
diff --git a/Help/command/find_program.rst b/Help/command/find_program.rst
index 4f00773..e2ff693 100644
--- a/Help/command/find_program.rst
+++ b/Help/command/find_program.rst
@@ -15,7 +15,8 @@ find_program
 .. |CMAKE_XXX_PATH| replace:: :variable:`CMAKE_PROGRAM_PATH`
 .. |CMAKE_XXX_MAC_PATH| replace:: :variable:`CMAKE_APPBUNDLE_PATH`
 
-.. |SYSTEM_ENVIRONMENT_PATH_XXX| replace:: ``PATH``
+.. |SYSTEM_ENVIRONMENT_PATH_XXX| replace:: The directories in ``PATH`` itself.
+.. |SYSTEM_ENVIRONMENT_PATH_WINDOWS_XXX| replace:: On Windows hosts no extra search paths are included
 
 .. |CMAKE_SYSTEM_PREFIX_PATH_XXX| replace::
    |CMAKE_SYSTEM_PREFIX_PATH_XXX_SUBDIR|
diff --git a/Help/manual/cmake-variables.7.rst b/Help/manual/cmake-variables.7.rst
index 75ddd5d..cc6a7d2 100644
--- a/Help/manual/cmake-variables.7.rst
+++ b/Help/manual/cmake-variables.7.rst
@@ -180,6 +180,11 @@ Variables that Change Behavior
    /variable/CMAKE_FIND_ROOT_PATH_MODE_LIBRARY
    /variable/CMAKE_FIND_ROOT_PATH_MODE_PACKAGE
    /variable/CMAKE_FIND_ROOT_PATH_MODE_PROGRAM
+   /variable/CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH
+   /variable/CMAKE_FIND_USE_CMAKE_PATH
+   /variable/CMAKE_FIND_USE_CMAKE_SYSTEM_PATH
+   /variable/CMAKE_FIND_USE_PACAKGE_ROOT_PATH
+   /variable/CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH
    /variable/CMAKE_FRAMEWORK_PATH
    /variable/CMAKE_IGNORE_PATH
    /variable/CMAKE_INCLUDE_DIRECTORIES_BEFORE
diff --git a/Help/release/dev/global-controls-over-find-locations.rst b/Help/release/dev/global-controls-over-find-locations.rst
new file mode 100644
index 0000000..d915fbb
--- /dev/null
+++ b/Help/release/dev/global-controls-over-find-locations.rst
@@ -0,0 +1,11 @@
+global-controls-over-find-locations
+-----------------------------------
+
+* The :command:`find_file`, :command:`find_library`, :command:`find_path`,
+  and :command:`find_program` commands have learned to check the following
+  variables to control searching
+  * :variable:`CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH` - Controls the searching the cmake-specific environment variables.
+  * :variable:`CMAKE_FIND_USE_CMAKE_PATH` - Controls the searching the cmake-specific cache variables.
+  * :variable:`CMAKE_FIND_USE_CMAKE_SYSTEM_PATH` - Controls the searching cmake platform specific variables.
+  * :variable:`CMAKE_FIND_USE_PACAKGE_ROOT_PATH` - Controls the searching of :variable:`<PackageName>_ROOT` variables.
+  * :variable:`CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH` - Controls the searching the standard system environment variables.
diff --git a/Help/variable/CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH.rst b/Help/variable/CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH.rst
new file mode 100644
index 0000000..3db510f
--- /dev/null
+++ b/Help/variable/CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH.rst
@@ -0,0 +1,11 @@
+CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH
+-------------------------------------
+
+Controls the searching the cmake-specific environment variables by the :command:`find_program`,
+:command:`find_library`, :command:`find_file`, :command:`find_package`, and :command:`find_path`.
+This is useful in cross-compiling environments.
+
+By default this this is set to ``TRUE``.
+
+See also the :variable:`CMAKE_FIND_USE_CMAKE_PATH`, :variable:`CMAKE_FIND_USE_CMAKE_SYSTEM_PATH`,
+:variable:`CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH`, and :variable:`CMAKE_FIND_USE_PACAKGE_ROOT_PATH` variables.
diff --git a/Help/variable/CMAKE_FIND_USE_CMAKE_PATH.rst b/Help/variable/CMAKE_FIND_USE_CMAKE_PATH.rst
new file mode 100644
index 0000000..86a6186
--- /dev/null
+++ b/Help/variable/CMAKE_FIND_USE_CMAKE_PATH.rst
@@ -0,0 +1,11 @@
+CMAKE_FIND_USE_CMAKE_PATH
+-------------------------
+
+Controls the searching the cmake-specific cache variables by the :command:`find_program`,
+:command:`find_library`, :command:`find_file`, :command:`find_package`, and :command:`find_path`.
+This is useful in cross-compiling environments.
+
+By default this this is set to ``TRUE``.
+
+See also the :variable:`CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH`, :variable:`CMAKE_FIND_USE_CMAKE_SYSTEM_PATH`,
+:variable:`CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH`, and :variable:`CMAKE_FIND_USE_PACAKGE_ROOT_PATH` variables.
diff --git a/Help/variable/CMAKE_FIND_USE_CMAKE_SYSTEM_PATH.rst b/Help/variable/CMAKE_FIND_USE_CMAKE_SYSTEM_PATH.rst
new file mode 100644
index 0000000..b4171c0
--- /dev/null
+++ b/Help/variable/CMAKE_FIND_USE_CMAKE_SYSTEM_PATH.rst
@@ -0,0 +1,11 @@
+CMAKE_FIND_USE_CMAKE_SYSTEM_PATH
+--------------------------------
+
+Controls the searching cmake platform specific variables by the :command:`find_program`,
+:command:`find_library`, :command:`find_file`, :command:`find_package`, and :command:`find_path`.
+This is useful in cross-compiling environments.
+
+By default this this is set to ``TRUE``.
+
+See also the :variable:`CMAKE_FIND_USE_CMAKE_PATH`, :variable:`CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH`,
+:variable:`CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH`, and :variable:`CMAKE_FIND_USE_PACAKGE_ROOT_PATH` variables.
diff --git a/Help/variable/CMAKE_FIND_USE_PACAKGE_ROOT_PATH.rst b/Help/variable/CMAKE_FIND_USE_PACAKGE_ROOT_PATH.rst
new file mode 100644
index 0000000..ac25ec9
--- /dev/null
+++ b/Help/variable/CMAKE_FIND_USE_PACAKGE_ROOT_PATH.rst
@@ -0,0 +1,11 @@
+CMAKE_FIND_USE_PACAKGE_ROOT_PATH
+--------------------------------
+
+Controls the searching of :variable:`<PackageName>_ROOT` variables by the :command:`find_program`,
+:command:`find_library`, :command:`find_file`, :command:`find_package`, and :command:`find_path`.
+This is useful in cross-compiling environments.
+
+By default this this is set to ``TRUE``.
+
+See also the :variable:`CMAKE_FIND_USE_CMAKE_PATH`, :variable:`CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH`,
+:variable:`CMAKE_FIND_USE_CMAKE_SYSTEM_PATH`, and :variable:`CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH` variables.
diff --git a/Help/variable/CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH.rst b/Help/variable/CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH.rst
new file mode 100644
index 0000000..fd0582f
--- /dev/null
+++ b/Help/variable/CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH.rst
@@ -0,0 +1,11 @@
+CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH
+--------------------------------------
+
+Controls the searching the standard system environment variables by the :command:`find_program`,
+:command:`find_library`, :command:`find_file`, :command:`find_package`, and :command:`find_path`.
+This is useful in cross-compiling environments.
+
+By default this this is set to ``TRUE``.
+
+See also the :variable:`CMAKE_FIND_USE_CMAKE_PATH`, :variable:`CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH`,
+:variable:`CMAKE_FIND_USE_CMAKE_SYSTEM_PATH`, and :variable:`CMAKE_FIND_USE_PACAKGE_ROOT_PATH` variables.
diff --git a/Source/cmFindBase.cxx b/Source/cmFindBase.cxx
index e590802..be7964a 100644
--- a/Source/cmFindBase.cxx
+++ b/Source/cmFindBase.cxx
@@ -67,6 +67,9 @@ bool cmFindBase::ParseArguments(std::vector<std::string> const& argsIn)
   }
   this->AlreadyInCache = false;
 
+  // Find what search path locations have been enabled/disable
+  this->SelectDefaultSearchModes();
+
   // Find the current root path mode.
   this->SelectDefaultRootPathMode();
 
diff --git a/Source/cmFindCommon.cxx b/Source/cmFindCommon.cxx
index 954558f..c6b9049 100644
--- a/Source/cmFindCommon.cxx
+++ b/Source/cmFindCommon.cxx
@@ -3,6 +3,7 @@
 #include "cmFindCommon.h"
 
 #include <algorithm>
+#include <array>
 #include <string.h>
 #include <utility>
 
@@ -144,6 +145,26 @@ void cmFindCommon::SelectDefaultMacMode()
   }
 }
 
+void cmFindCommon::SelectDefaultSearchModes()
+{
+  const std::array<std::pair<bool&, std::string>, 5> search_paths = {
+    { { this->NoPackageRootPath, "CMAKE_FIND_USE_PACAKGE_ROOT_PATH" },
+      { this->NoCMakePath, "CMAKE_FIND_USE_CMAKE_PATH" },
+      { this->NoCMakeEnvironmentPath,
+        "CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH" },
+      { this->NoSystemEnvironmentPath,
+        "CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH" },
+      { this->NoCMakeSystemPath, "CMAKE_FIND_USE_CMAKE_SYSTEM_PATH" } }
+  };
+
+  for (auto& path : search_paths) {
+    const char* def = this->Makefile->GetDefinition(path.second);
+    if (def) {
+      path.first = !cmSystemTools::IsOn(def);
+    }
+  }
+}
+
 void cmFindCommon::RerootPaths(std::vector<std::string>& paths)
 {
 #if 0
diff --git a/Source/cmFindCommon.h b/Source/cmFindCommon.h
index 89ff174..d95eeb1 100644
--- a/Source/cmFindCommon.h
+++ b/Source/cmFindCommon.h
@@ -90,6 +90,9 @@ protected:
   /** Compute the current default bundle/framework search policy.  */
   void SelectDefaultMacMode();
 
+  /** Compute the current default search modes based on global variables.  */
+  void SelectDefaultSearchModes();
+
   // Path arguments prior to path manipulation routines
   std::vector<std::string> UserHintsArgs;
   std::vector<std::string> UserGuessArgs;
diff --git a/Tests/RunCMake/find_file/FromPATHEnv-stdout-cygwin.txt b/Tests/RunCMake/find_file/FromPATHEnv-stdout-cygwin.txt
new file mode 100644
index 0000000..6912bdf
--- /dev/null
+++ b/Tests/RunCMake/find_file/FromPATHEnv-stdout-cygwin.txt
@@ -0,0 +1,9 @@
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='.*/Tests/RunCMake/find_file/include/PrefixInPATH.h'
+-- PrefixInPATH_File='.*/Tests/RunCMake/find_file/include/PrefixInPATH.h'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
diff --git a/Tests/RunCMake/find_file/FromPATHEnv-stdout-windows.txt b/Tests/RunCMake/find_file/FromPATHEnv-stdout-windows.txt
new file mode 100644
index 0000000..6912bdf
--- /dev/null
+++ b/Tests/RunCMake/find_file/FromPATHEnv-stdout-windows.txt
@@ -0,0 +1,9 @@
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='.*/Tests/RunCMake/find_file/include/PrefixInPATH.h'
+-- PrefixInPATH_File='.*/Tests/RunCMake/find_file/include/PrefixInPATH.h'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
diff --git a/Tests/RunCMake/find_file/FromPATHEnv-stdout.txt b/Tests/RunCMake/find_file/FromPATHEnv-stdout.txt
new file mode 100644
index 0000000..27a83ad
--- /dev/null
+++ b/Tests/RunCMake/find_file/FromPATHEnv-stdout.txt
@@ -0,0 +1,9 @@
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='.*/Tests/RunCMake/find_file/include/PrefixInPATH.h'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
diff --git a/Tests/RunCMake/find_file/FromPATHEnv.cmake b/Tests/RunCMake/find_file/FromPATHEnv.cmake
new file mode 100644
index 0000000..9f058dd
--- /dev/null
+++ b/Tests/RunCMake/find_file/FromPATHEnv.cmake
@@ -0,0 +1,24 @@
+set(ENV_PATH "$ENV{PATH}")
+foreach(path "/does_not_exist" "/include" "")
+  unset(PrefixInPATH_File CACHE)
+  set(ENV{PATH} "${CMAKE_CURRENT_SOURCE_DIR}${path}")
+  find_file(PrefixInPATH_File NAMES PrefixInPATH.h)
+  message(STATUS "PrefixInPATH_File='${PrefixInPATH_File}'")
+endforeach()
+
+set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH OFF)
+foreach(path "/does_not_exist" "/include" "")
+  unset(PrefixInPATH_File CACHE)
+  set(ENV{PATH} "${CMAKE_CURRENT_SOURCE_DIR}${path}")
+  find_file(PrefixInPATH_File NAMES PrefixInPATH.h)
+  message(STATUS "PrefixInPATH_File='${PrefixInPATH_File}'")
+endforeach()
+
+set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH ON)
+foreach(path "/does_not_exist" "/include" "")
+  unset(PrefixInPATH_File CACHE)
+  set(ENV{PATH} "${CMAKE_CURRENT_SOURCE_DIR}${path}")
+  find_file(PrefixInPATH_File NAMES PrefixInPATH.h NO_SYSTEM_ENVIRONMENT_PATH)
+  message(STATUS "PrefixInPATH_File='${PrefixInPATH_File}'")
+endforeach()
+set(ENV{PATH} "${ENV_PATH}")
diff --git a/Tests/RunCMake/find_file/FromPrefixPath-stdout.txt b/Tests/RunCMake/find_file/FromPrefixPath-stdout.txt
new file mode 100644
index 0000000..4bd24aa
--- /dev/null
+++ b/Tests/RunCMake/find_file/FromPrefixPath-stdout.txt
@@ -0,0 +1,6 @@
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='.*/Tests/RunCMake/find_file/include/PrefixInPATH.h'
+-- PrefixInPATH_File='.*/Tests/RunCMake/find_file/include/PrefixInPATH.h'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
+-- PrefixInPATH_File='PrefixInPATH_File-NOTFOUND'
diff --git a/Tests/RunCMake/find_file/FromPrefixPath.cmake b/Tests/RunCMake/find_file/FromPrefixPath.cmake
new file mode 100644
index 0000000..1bf8409
--- /dev/null
+++ b/Tests/RunCMake/find_file/FromPrefixPath.cmake
@@ -0,0 +1,17 @@
+set(ENV{PATH} "")
+foreach(path "/does_not_exist" "/include" "")
+  unset(PrefixInPATH_File CACHE)
+  set(CMAKE_PREFIX_PATH "${CMAKE_CURRENT_SOURCE_DIR}${path}")
+  find_file(PrefixInPATH_File NAMES PrefixInPATH.h)
+  message(STATUS "PrefixInPATH_File='${PrefixInPATH_File}'")
+endforeach()
+
+set(CMAKE_FIND_USE_CMAKE_PATH OFF)
+set(CMAKE_PREFIX_PATH )
+foreach(path "/does_not_exist" "/include" "")
+  unset(PrefixInPATH_File CACHE)
+  set(CMAKE_PREFIX_PATH "${CMAKE_CURRENT_SOURCE_DIR}${path}")
+  find_file(PrefixInPATH_File NAMES PrefixInPATH.h)
+  message(STATUS "PrefixInPATH_File='${PrefixInPATH_File}'")
+endforeach()
+set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH ON)
diff --git a/Tests/RunCMake/find_file/RunCMakeTest.cmake b/Tests/RunCMake/find_file/RunCMakeTest.cmake
index 014f397..9f56a57 100644
--- a/Tests/RunCMake/find_file/RunCMakeTest.cmake
+++ b/Tests/RunCMake/find_file/RunCMakeTest.cmake
@@ -1,3 +1,5 @@
 include(RunCMake)
 
+run_cmake(FromPATHEnv)
+run_cmake(FromPrefixPath)
 run_cmake(PrefixInPATH)
diff --git a/Tests/RunCMake/find_library/FromPATHEnv-stdout-cygwin.txt b/Tests/RunCMake/find_library/FromPATHEnv-stdout-cygwin.txt
new file mode 100644
index 0000000..01e2720
--- /dev/null
+++ b/Tests/RunCMake/find_library/FromPATHEnv-stdout-cygwin.txt
@@ -0,0 +1,6 @@
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
+-- CREATED_LIBRARY='[^']*/Tests/RunCMake/find_library/FromPATHEnv-build/lib/libcreated.a'
+-- CREATED_LIBRARY='[^']*/Tests/RunCMake/find_library/FromPATHEnv-build/lib/libcreated.a'
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
diff --git a/Tests/RunCMake/find_library/FromPATHEnv-stdout-windows.txt b/Tests/RunCMake/find_library/FromPATHEnv-stdout-windows.txt
new file mode 100644
index 0000000..01e2720
--- /dev/null
+++ b/Tests/RunCMake/find_library/FromPATHEnv-stdout-windows.txt
@@ -0,0 +1,6 @@
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
+-- CREATED_LIBRARY='[^']*/Tests/RunCMake/find_library/FromPATHEnv-build/lib/libcreated.a'
+-- CREATED_LIBRARY='[^']*/Tests/RunCMake/find_library/FromPATHEnv-build/lib/libcreated.a'
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
diff --git a/Tests/RunCMake/find_library/FromPATHEnv-stdout.txt b/Tests/RunCMake/find_library/FromPATHEnv-stdout.txt
new file mode 100644
index 0000000..4e570a6
--- /dev/null
+++ b/Tests/RunCMake/find_library/FromPATHEnv-stdout.txt
@@ -0,0 +1,6 @@
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
+-- CREATED_LIBRARY='[^']*/Tests/RunCMake/find_library/FromPATHEnv-build/lib/libcreated.a'
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
diff --git a/Tests/RunCMake/find_library/FromPATHEnv.cmake b/Tests/RunCMake/find_library/FromPATHEnv.cmake
new file mode 100644
index 0000000..fec041d
--- /dev/null
+++ b/Tests/RunCMake/find_library/FromPATHEnv.cmake
@@ -0,0 +1,22 @@
+list(APPEND CMAKE_FIND_LIBRARY_PREFIXES lib)
+list(APPEND CMAKE_FIND_LIBRARY_SUFFIXES .a)
+set(ENV_PATH "$ENV{PATH}")
+file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/lib)
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/lib/libcreated.a" "created")
+
+foreach(path "/does_not_exist" "/lib" "")
+  unset(CREATED_LIBRARY CACHE)
+  set(ENV{PATH} "${CMAKE_CURRENT_BINARY_DIR}${path}")
+  find_library(CREATED_LIBRARY NAMES created)
+  message(STATUS "CREATED_LIBRARY='${CREATED_LIBRARY}'")
+endforeach()
+
+set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH OFF)
+foreach(path "/does_not_exist" "/lib" "")
+  unset(CREATED_LIBRARY CACHE)
+  set(ENV{PATH} "${CMAKE_CURRENT_BINARY_DIR}${path}")
+  find_library(CREATED_LIBRARY NAMES created)
+  message(STATUS "CREATED_LIBRARY='${CREATED_LIBRARY}'")
+endforeach()
+set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH ON)
+set(ENV{PATH} "${ENV_PATH}")
diff --git a/Tests/RunCMake/find_library/FromPrefixPath-stdout.txt b/Tests/RunCMake/find_library/FromPrefixPath-stdout.txt
new file mode 100644
index 0000000..de3df1a
--- /dev/null
+++ b/Tests/RunCMake/find_library/FromPrefixPath-stdout.txt
@@ -0,0 +1,6 @@
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
+-- CREATED_LIBRARY='[^']*/Tests/RunCMake/find_library/FromPrefixPath-build/lib/libcreated.a'
+-- CREATED_LIBRARY='[^']*/Tests/RunCMake/find_library/FromPrefixPath-build/lib/libcreated.a'
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
+-- CREATED_LIBRARY='CREATED_LIBRARY-NOTFOUND'
diff --git a/Tests/RunCMake/find_library/FromPrefixPath.cmake b/Tests/RunCMake/find_library/FromPrefixPath.cmake
new file mode 100644
index 0000000..04763a9
--- /dev/null
+++ b/Tests/RunCMake/find_library/FromPrefixPath.cmake
@@ -0,0 +1,24 @@
+list(APPEND CMAKE_FIND_LIBRARY_PREFIXES lib)
+list(APPEND CMAKE_FIND_LIBRARY_SUFFIXES .a)
+set(ENV_PATH "$ENV{PATH}")
+set(ENV{PATH} "")
+file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/lib)
+file(WRITE "${CMAKE_CURRENT_BINARY_DIR}/lib/libcreated.a" "created")
+
+foreach(path "/does_not_exist" "/lib" "")
+  unset(CREATED_LIBRARY CACHE)
+  set(CMAKE_PREFIX_PATH "${CMAKE_CURRENT_BINARY_DIR}${path}")
+  find_library(CREATED_LIBRARY NAMES created)
+  message(STATUS "CREATED_LIBRARY='${CREATED_LIBRARY}'")
+endforeach()
+
+set(CMAKE_FIND_USE_CMAKE_PATH OFF)
+set(CMAKE_PREFIX_PATH )
+foreach(path "/does_not_exist" "/lib" "")
+  unset(CREATED_LIBRARY CACHE)
+  set(CMAKE_PREFIX_PATH "${CMAKE_CURRENT_BINARY_DIR}${path}")
+  find_library(CREATED_LIBRARY NAMES created)
+  message(STATUS "CREATED_LIBRARY='${CREATED_LIBRARY}'")
+endforeach()
+set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH ON)
+set(ENV{PATH} "${ENV_PATH}")
diff --git a/Tests/RunCMake/find_library/RunCMakeTest.cmake b/Tests/RunCMake/find_library/RunCMakeTest.cmake
index ecfa0fe..643a5b9 100644
--- a/Tests/RunCMake/find_library/RunCMakeTest.cmake
+++ b/Tests/RunCMake/find_library/RunCMakeTest.cmake
@@ -1,6 +1,8 @@
 include(RunCMake)
 
 run_cmake(Created)
+run_cmake(FromPrefixPath)
+run_cmake(FromPATHEnv)
 if(CMAKE_HOST_UNIX)
   run_cmake(LibArchLink)
 endif()
diff --git a/Tests/RunCMake/find_path/FromPATHEnv-stdout-cygwin.txt b/Tests/RunCMake/find_path/FromPATHEnv-stdout-cygwin.txt
new file mode 100644
index 0000000..8f3e7ca
--- /dev/null
+++ b/Tests/RunCMake/find_path/FromPATHEnv-stdout-cygwin.txt
@@ -0,0 +1,9 @@
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='.*/Tests/RunCMake/find_path/include'
+-- PATH_IN_ENV_PATH='.*/Tests/RunCMake/find_path/include'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
diff --git a/Tests/RunCMake/find_path/FromPATHEnv-stdout-windows.txt b/Tests/RunCMake/find_path/FromPATHEnv-stdout-windows.txt
new file mode 100644
index 0000000..8f3e7ca
--- /dev/null
+++ b/Tests/RunCMake/find_path/FromPATHEnv-stdout-windows.txt
@@ -0,0 +1,9 @@
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='.*/Tests/RunCMake/find_path/include'
+-- PATH_IN_ENV_PATH='.*/Tests/RunCMake/find_path/include'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
diff --git a/Tests/RunCMake/find_path/FromPATHEnv-stdout.txt b/Tests/RunCMake/find_path/FromPATHEnv-stdout.txt
new file mode 100644
index 0000000..fd41bf4
--- /dev/null
+++ b/Tests/RunCMake/find_path/FromPATHEnv-stdout.txt
@@ -0,0 +1,9 @@
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='.*/Tests/RunCMake/find_path/include'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
+-- PATH_IN_ENV_PATH='PATH_IN_ENV_PATH-NOTFOUND'
diff --git a/Tests/RunCMake/find_path/FromPATHEnv.cmake b/Tests/RunCMake/find_path/FromPATHEnv.cmake
new file mode 100644
index 0000000..af13d09
--- /dev/null
+++ b/Tests/RunCMake/find_path/FromPATHEnv.cmake
@@ -0,0 +1,25 @@
+set(ENV_PATH "$ENV{PATH}")
+foreach(path "/does_not_exist" "/include" "")
+  unset(PATH_IN_ENV_PATH CACHE)
+  set(ENV{PATH} "${CMAKE_CURRENT_SOURCE_DIR}${path}")
+  find_path(PATH_IN_ENV_PATH NAMES PrefixInPATH.h)
+  message(STATUS "PATH_IN_ENV_PATH='${PATH_IN_ENV_PATH}'")
+endforeach()
+
+set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH OFF)
+foreach(path "/does_not_exist" "/include" "")
+  unset(PATH_IN_ENV_PATH CACHE)
+  set(ENV{PATH} "${CMAKE_CURRENT_SOURCE_DIR}${path}")
+  find_path(PATH_IN_ENV_PATH NAMES PrefixInPATH.h)
+  message(STATUS "PATH_IN_ENV_PATH='${PATH_IN_ENV_PATH}'")
+endforeach()
+
+set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH ON)
+foreach(path "/does_not_exist" "/include" "")
+  unset(PATH_IN_ENV_PATH CACHE)
+  set(ENV{PATH} "${CMAKE_CURRENT_SOURCE_DIR}${path}")
+  find_path(PATH_IN_ENV_PATH NAMES PrefixInPATH.h NO_SYSTEM_ENVIRONMENT_PATH)
+  message(STATUS "PATH_IN_ENV_PATH='${PATH_IN_ENV_PATH}'")
+endforeach()
+
+set(ENV{PATH} "${ENV_PATH}")
diff --git a/Tests/RunCMake/find_path/RunCMakeTest.cmake b/Tests/RunCMake/find_path/RunCMakeTest.cmake
index 6d22124..8b5b5b7 100644
--- a/Tests/RunCMake/find_path/RunCMakeTest.cmake
+++ b/Tests/RunCMake/find_path/RunCMakeTest.cmake
@@ -1,5 +1,6 @@
 include(RunCMake)
 
+run_cmake(FromPATHEnv)
 run_cmake(PrefixInPATH)
 
 if(APPLE)
diff --git a/Tests/RunCMake/find_program/EnvAndHints-stdout.txt b/Tests/RunCMake/find_program/EnvAndHints-stdout.txt
index 39329b2..0051636 100644
--- a/Tests/RunCMake/find_program/EnvAndHints-stdout.txt
+++ b/Tests/RunCMake/find_program/EnvAndHints-stdout.txt
@@ -1 +1,4 @@
 -- PROG='[^']*/Tests/RunCMake/find_program/A/testAandB'
+-- PROG='PROG-NOTFOUND'
+-- PROG='[^']*/Tests/RunCMake/find_program/B/testAandB'
+-- PROG='[^']*/Tests/RunCMake/find_program/A/testAandB'
diff --git a/Tests/RunCMake/find_program/EnvAndHints.cmake b/Tests/RunCMake/find_program/EnvAndHints.cmake
index 14ebd6e..0f12eff 100644
--- a/Tests/RunCMake/find_program/EnvAndHints.cmake
+++ b/Tests/RunCMake/find_program/EnvAndHints.cmake
@@ -1,8 +1,31 @@
+
 set(ENV_PATH "$ENV{PATH}")
 set(ENV{PATH} ${CMAKE_CURRENT_SOURCE_DIR}/A)
 find_program(PROG
   NAMES testAandB
+  )
+message(STATUS "PROG='${PROG}'")
+unset(PROG CACHE)
+
+set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH OFF)
+find_program(PROG
+  NAMES testAandB
+  )
+message(STATUS "PROG='${PROG}'")
+unset(PROG CACHE)
+
+find_program(PROG
+  NAMES testAandB
+  HINTS ${CMAKE_CURRENT_SOURCE_DIR}/B ${CMAKE_CURRENT_SOURCE_DIR}/A
+  )
+message(STATUS "PROG='${PROG}'")
+unset(PROG CACHE)
+set(ENV{PATH} "${ENV_PATH}")
+
+find_program(PROG
+  NAMES testAandB
   HINTS ${CMAKE_CURRENT_SOURCE_DIR}/A ${CMAKE_CURRENT_SOURCE_DIR}/B
   )
 message(STATUS "PROG='${PROG}'")
+unset(PROG CACHE)
 set(ENV{PATH} "${ENV_PATH}")
diff --git a/Tests/RunCMake/find_program/RelAndAbsPath-stdout.txt b/Tests/RunCMake/find_program/RelAndAbsPath-stdout.txt
index cb3c99f..d2312e7 100644
--- a/Tests/RunCMake/find_program/RelAndAbsPath-stdout.txt
+++ b/Tests/RunCMake/find_program/RelAndAbsPath-stdout.txt
@@ -1,6 +1,8 @@
 -- PROG_ABS='PROG_ABS-NOTFOUND'
 -- PROG_ABS_NPD='PROG_ABS_NPD-NOTFOUND'
 -- PROG_CWD='PROG_CWD-NOTFOUND'
+-- PROG_CWD='PROG_CWD-NOTFOUND'
+-- PROG_CWD='[^']*/Tests/RunCMake/find_program/testCWD'
 -- PROG_CWD_NPD='PROG_CWD_NPD-NOTFOUND'
 -- PROG_CWD_DOT='[^']*/Tests/RunCMake/find_program/testCWD'
 -- PROG_CWD_DOT_NPD='[^']*/Tests/RunCMake/find_program/testCWD'
diff --git a/Tests/RunCMake/find_program/RelAndAbsPath.cmake b/Tests/RunCMake/find_program/RelAndAbsPath.cmake
index 9a42c5e..e6bdef7 100644
--- a/Tests/RunCMake/find_program/RelAndAbsPath.cmake
+++ b/Tests/RunCMake/find_program/RelAndAbsPath.cmake
@@ -38,6 +38,28 @@ find_program(PROG_CWD
   )
 message(STATUS "PROG_CWD='${PROG_CWD}'")
 
+
+set(CMAKE_PREFIX_PATH ".")
+# On some platforms / dashboards the current working
+# directory can be in PATH or other search locations
+# so disable all searching to make sure this fails
+set(CMAKE_FIND_USE_CMAKE_ENVIRONMENT_PATH OFF)
+set(CMAKE_FIND_USE_CMAKE_PATH OFF)
+set(CMAKE_FIND_USE_CMAKE_SYSTEM_PATH OFF)
+set(CMAKE_FIND_USE_PACAKGE_ROOT_PATH OFF)
+set(CMAKE_FIND_USE_SYSTEM_ENVIRONMENT_PATH OFF)
+find_program(PROG_CWD
+  NAMES testCWD
+  )
+message(STATUS "PROG_CWD='${PROG_CWD}'")
+
+set(CMAKE_PREFIX_PATH ".")
+set(CMAKE_FIND_USE_CMAKE_PATH ON)
+find_program(PROG_CWD
+  NAMES testCWD
+  )
+message(STATUS "PROG_CWD='${PROG_CWD}'")
+
 find_program(PROG_CWD_NPD
   NAMES testCWD
   NAMES_PER_DIR