OS X: Encode -F framework search flag in per-language platform variable

Compilers for languages other than C and C++ on OS X may not understand
the -F framework search flag.  Create a new platform information
variable CMAKE_<LANG>_FRAMEWORK_SEARCH_FLAG to hold the flag, and set it
for C and CXX lanugages in the Platform/Darwin module.

Reported-by: Vittorio Giovara <vittorio.giovara@gmail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/Modules/Platform/Darwin.cmake b/Modules/Platform/Darwin.cmake
index 72844b5..8ab3e2c 100644
--- a/Modules/Platform/Darwin.cmake
+++ b/Modules/Platform/Darwin.cmake
@@ -268,6 +268,11 @@ set(CMAKE_C_CREATE_MACOSX_FRAMEWORK
 set(CMAKE_CXX_CREATE_MACOSX_FRAMEWORK
       "<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 default framework search path flag for languages known to use a
+# preprocessor that may find headers in frameworks.
+set(CMAKE_C_FRAMEWORK_SEARCH_FLAG -F)
+set(CMAKE_CXX_FRAMEWORK_SEARCH_FLAG -F)
+set(CMAKE_Fortran_FRAMEWORK_SEARCH_FLAG -F)
 
 # default to searching for frameworks first
 if(NOT DEFINED CMAKE_FIND_FRAMEWORK)