ENH: use the same CMAKE_SKIP_RPATH setting in CHECK_C/CXX_SOURCE_RUNS as in

the main project. I think it doesn't make sense if a project disables
RPATH, uses CHECK_C_SOURCE_RUNS() to see if something is able to run, and
this succeeds because it has been built with RPATH, but an executable built
within the project won't be able to run since it has been built without
RPATH.

Alex

Modules/CheckCSourceRuns.cmake

@@ -37,6 +37,7 @@ MACRO(CHECK_C_SOURCE_RUNS SOURCE VAR)
       ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.c
       COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
       CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
+      -DCMAKE_SKIP_RPATH:BOOL=${CMAKE_SKIP_RPATH}
       "${CHECK_C_SOURCE_COMPILES_ADD_LIBRARIES}"
       "${CHECK_C_SOURCE_COMPILES_ADD_INCLUDES}"
       COMPILE_OUTPUT_VARIABLE OUTPUT)

Modules/CheckCXXSourceRuns.cmake

@@ -37,6 +37,7 @@ MACRO(CHECK_CXX_SOURCE_RUNS SOURCE VAR)
       ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeTmp/src.cxx
       COMPILE_DEFINITIONS ${CMAKE_REQUIRED_DEFINITIONS}
       CMAKE_FLAGS -DCOMPILE_DEFINITIONS:STRING=${MACRO_CHECK_FUNCTION_DEFINITIONS}
+      -DCMAKE_SKIP_RPATH:BOOL=${CMAKE_SKIP_RPATH}
       "${CHECK_CXX_SOURCE_COMPILES_ADD_LIBRARIES}"
       "${CHECK_CXX_SOURCE_COMPILES_ADD_INCLUDES}"
       COMPILE_OUTPUT_VARIABLE OUTPUT)