Import Geant4 11.1.0.beta source tree

source/externals/ptl/cmake/Modules/PTLCoverage.cmake

@@ -0,0 +1,23 @@
+if(CMAKE_CXX_COMPILER_ID MATCHES "GNU|(Apple)?Clang")
+    set(ptl_coverage_args "--coverage")
+    check_cxx_compiler_flag("-fprofile-abs-path ${PTL_COVERAGE_FLAGS}"
+                            PTL_HAS_PROFILE_ABS_PATH)
+    if(PTL_HAS_PROFILE_ABS_PATH)
+        string(APPEND ptl_coverage_args " -fprofile-abs-path")
+    endif()
+else()
+    set(ptl_coverage_args)
+    message(
+        WARNING
+            "PTL_USE_COVERAGE is ON, but is not supported for compiler '${CMAKE_CXX_COMPILER_ID}"
+        )
+endif()
+
+# We're setting the DEBUG CXX flags and C flags because we only use coverage in Debug
+# builds but want them to propagate down Once CMake 3.13 is the minimum, we can use
+# add_{compile,link}_options + genexs instead
+string(APPEND CMAKE_C_FLAGS_DEBUG " ${ptl_coverage_args}")
+string(APPEND CMAKE_CXX_FLAGS_DEBUG " ${ptl_coverage_args}")
+string(APPEND CMAKE_EXE_LINKER_FLAGS_DEBUG " ${ptl_coverage_args}")
+string(APPEND CMAKE_SHARED_LINKER_FLAGS_DEBUG " ${ptl_coverage_args}")
+string(APPEND CMAKE_MODULE_LINKER_FLAGS_DEBUG " ${ptl_coverage_args}")