From 4487d292e85a4c4e626887750e71836a2e281684 Mon Sep 17 00:00:00 2001
From: Jonas Kvinge <jonas@jkvinge.net>
Date: Mon, 13 Jun 2022 21:29:09 +0200
Subject: [PATCH] Set C standard to C99 for MSVC

---
 CMakeLists.txt | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bbf365fab..71c8d371d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -32,17 +32,22 @@ endif()
 
 set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake)
 
-set(CMAKE_C_STANDARD 17)
+if(MSVC)
+  set(CMAKE_C_STANDARD 99)
+else()
+  set(CMAKE_C_STANDARD 11)
+endif()
+
 set(CMAKE_C_STANDARD_REQUIRED ON)
 
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 if(MSVC)
-  list(APPEND COMPILE_OPTIONS /std:c++17 /MP)
+  list(APPEND COMPILE_OPTIONS /MP)
 else()
   list(APPEND COMPILE_OPTIONS
-    $<$<COMPILE_LANGUAGE:C>:-std=c17>
+    $<$<COMPILE_LANGUAGE:C>:-std=c11>
     $<$<COMPILE_LANGUAGE:CXX>:-std=c++17>
     -Wall
     -Wextra