merging 1.1 internal gerrit to github
diff --git a/api-tests/tools/cmake/compiler/HOST_GCC.cmake b/api-tests/tools/cmake/compiler/HOST_GCC.cmake
index b26ed76..35c9d54 100644
--- a/api-tests/tools/cmake/compiler/HOST_GCC.cmake
+++ b/api-tests/tools/cmake/compiler/HOST_GCC.cmake
@@ -47,6 +47,6 @@
 
 foreach(_LNG IN ITEMS "C" "ASM")
 	set(CMAKE_${_LNG}_COMPILER ${_C_TOOLCHAIN_PATH})
-	set(CMAKE_C_FLAGS	"-g -Wall -Werror -Werror")
+	set(CMAKE_C_FLAGS	"-g -Wall -Werror -Werror -std=c99")
 	message(STATUS "[PSA] : ${_LNG}  compiler used '${CMAKE_${_LNG}_COMPILER}'")
 endforeach()