Check for __restrict in a way to make MSVC happy, hopefully

1 files changed, 5 insertions, 1 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d4fa325f..20f752c5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -104,7 +104,11 @@ CHECK_TYPE_SIZE("long long" SIZEOF_LONG_LONG)
 CHECK_C_SOURCE_COMPILES("int *restrict foo;
                          int main() {return 0;}" HAVE_RESTRICT)
 IF(NOT HAVE_RESTRICT)
-    CHECK_C_SOURCE_COMPILES("int *__restrict foo;
+    # Slightly convoluted way to do this, because MSVC may barf is restrict is
+    # defined to __restrict.
+    CHECK_C_SOURCE_COMPILES("#define restrict __restrict
+                             #include <stdlib.h>
+                             int *restrict foo;
                              int main() {return 0;}" HAVE___RESTRICT)
     IF(HAVE___RESTRICT)
         ADD_DEFINITIONS(-Drestrict=__restrict)