Add checking stdatomic header file checking

Check wheter stdatomic header file exists, if not, use the
atomic operations defined in libmetal, if not, use the
atomic operations defined in libmetal.

Signed-off-by: Wendy Liang <jliang@xilinx.com>

diff --git a/cmake/depends.cmake b/cmake/depends.cmake
index aee3db7159b509303ddf947858446d8f477fca4e..d8dddac9001313e5355652a76890b5e70fd6d925 100644 (file)
--- a/cmake/depends.cmake
+++ b/cmake/depends.cmake
@@ -2,4 +2,12 @@ find_package (Libmetal REQUIRED)
 collect (PROJECT_INC_DIRS "${LIBMETAL_INCLUDE_DIR}")
 collect (PROJECT_LIB_DIRS "${LIBMETAL_LIB_DIR}")
 
+if ("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
+  check_include_files (stdatomic.h HAVE_STDATOMIC_H)
+else ("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
+  set (_saved_cmake_required_flags ${CMAKE_REQUIRED_FLAGS})
+  set (CMAKE_REQUIRED_FLAGS "-c")
+  check_include_files (stdatomic.h HAVE_STDATOMIC_H)
+  set (CMAKE_REQUIRED_FLAGS ${_saved_cmake_required_flags})
+endif ("${CMAKE_SYSTEM_NAME}" STREQUAL "Linux")
 # vim: expandtab:ts=2:sw=2:smartindent