Pass c99 to compiler in CMakeLists.txt

Fixes Mbed-TLS#3631 Signed-off-by: okhowang(王沛文) <okhowang@tencent.com>
okhowang · Aug 2, 2021 · 4a6b639 · 4a6b639
1 parent 6981347
commit 4a6b639
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diff --git a/3rdparty/everest/library/Hacl_Curve25519_joined.c b/3rdparty/everest/library/Hacl_Curve25519_joined.c
@@ -18,6 +18,12 @@
  *
  *  This file is part of mbed TLS (https://tls.mbed.org)
  */
+#ifndef _BSD_SOURCE
+#define _BSD_SOURCE
+#endif
+#ifndef _DEFAULT_SOURCE
+#define _DEFAULT_SOURCE
+#endif
 
 #include "common.h"
 

diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -139,6 +139,8 @@ string(REGEX MATCH "Clang" CMAKE_COMPILER_IS_CLANG "${CMAKE_C_COMPILER_ID}")
 
 include(CheckCCompilerFlag)
 
+set(CMAKE_C_STANDARD 99)
+
 if(CMAKE_COMPILER_IS_GNU)
     # some warnings we want are not available with old GCC versions
     # note: starting with CMake 2.8 we could use CMAKE_C_COMPILER_VERSION

diff --git a/ChangeLog.d/c99.txt b/ChangeLog.d/c99.txt
@@ -0,0 +1,3 @@
+Changes
+   * Pass standard c99 to compiler in CMakeLists.txt
+
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		Changes
		* Pass standard c99 to compiler in CMakeLists.txt