commit c2882410ed83bfce1918d53601ac1a5d67624e85
author Alberto Escolar Piedras <alpi@oticon.com> Thu Jul 05 10:51:03 2018 +0200
committer Anas Nashif <anas.nashif@intel.com> Thu Jul 05 12:55:07 2018 -0400
tree 83afd3317637aaf11cb13b625283799b2e3d0073
parent 0de49e5d402eaf7cbcb6e121f90c827ac4dd49dc

cmake: Allow C standard version to be overriden

Allow archs/boards/apps to override the C standard version.

Signed-off-by: Alberto Escolar Piedras <alpi@oticon.com>

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index aa80814..450df59 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -120,8 +120,6 @@
 )
 
 zephyr_compile_options(
-  $<$<COMPILE_LANGUAGE:C>:-std=c99>
-
   $<$<COMPILE_LANGUAGE:CXX>:-std=c++11>
   $<$<COMPILE_LANGUAGE:CXX>:-fcheck-new>
   $<$<COMPILE_LANGUAGE:CXX>:-ffunction-sections>
@@ -992,6 +990,13 @@
 get_property(TOPT GLOBAL PROPERTY TOPT)
 set_ifndef(  TOPT -T)
 
+get_property(CSTD GLOBAL PROPERTY CSTD)
+set_ifndef(CSTD c99)
+
+zephyr_compile_options(
+  $<$<COMPILE_LANGUAGE:C>:-std=${CSTD}>
+)
+
 configure_file(
      $ENV{ZEPHYR_BASE}/include/arch/arm/cortex_m/scripts/app_data_alignment.ld
      ${PROJECT_BINARY_DIR}/include/generated/app_data_alignment.ld)