Let user know when CMAKE_CXX_FLAGS are being ignored.

Author: stefanatwork

common/cmake/clang.cmake

@@ -83,6 +83,7 @@ ELSE()
   OPTION(EMBREE_IGNORE_CMAKE_CXX_FLAGS "When enabled Embree ignores default CMAKE_CXX_FLAGS." ON)
   OPTION(EMBREE_ADDRESS_SANITIZER "Enabled CLANG address sanitizer." OFF)
   IF (EMBREE_IGNORE_CMAKE_CXX_FLAGS)
+    MESSAGE(STATUS "Ignoring CMAKE_CXX_FLAGS because EMBREE_IGNORE_CMAKE_CXX_FLAGS is enabled.")
     SET(CMAKE_CXX_FLAGS "")
   ENDIF()
 

common/cmake/dpcpp.cmake

@@ -16,6 +16,7 @@ _SET_IF_EMPTY(FLAGS_AVX512 "-march=skx")
 IF (NOT WIN32)
   OPTION(EMBREE_IGNORE_CMAKE_CXX_FLAGS "When enabled Embree ignores default CMAKE_CXX_FLAGS." ON)
   IF (EMBREE_IGNORE_CMAKE_CXX_FLAGS)
+    MESSAGE(STATUS "Ignoring CMAKE_CXX_FLAGS because EMBREE_IGNORE_CMAKE_CXX_FLAGS is enabled.")
     SET(CMAKE_CXX_FLAGS "")
   ENDIF()
 ENDIF()

common/cmake/gnu.cmake

@@ -22,6 +22,7 @@ ENDIF ()
 
 OPTION(EMBREE_IGNORE_CMAKE_CXX_FLAGS "When enabled Embree ignores default CMAKE_CXX_FLAGS." ON)
 IF (EMBREE_IGNORE_CMAKE_CXX_FLAGS)
+  MESSAGE(STATUS "Ignoring CMAKE_CXX_FLAGS because EMBREE_IGNORE_CMAKE_CXX_FLAGS is enabled.")
   SET(CMAKE_CXX_FLAGS "")
 ENDIF()
 

common/cmake/intel.cmake

@@ -102,6 +102,7 @@ ELSE()
 
   OPTION(EMBREE_IGNORE_CMAKE_CXX_FLAGS "When enabled Embree ignores default CMAKE_CXX_FLAGS." ON)
   IF (EMBREE_IGNORE_CMAKE_CXX_FLAGS)
+    MESSAGE(STATUS "Ignoring CMAKE_CXX_FLAGS because EMBREE_IGNORE_CMAKE_CXX_FLAGS is enabled.")
     SET(CMAKE_CXX_FLAGS "")
   ENDIF()