[openmp] Fix building in debug mode with mingw

Mingw doesn't provide the _malloc_dbg/_free_dbg functions.

Differential Revision: https://reviews.llvm.org/D137743

diff --git a/openmp/runtime/src/kmp_wrapper_malloc.h b/openmp/runtime/src/kmp_wrapper_malloc.h
index c027e0b..1f75e88 100644 (file)
--- a/openmp/runtime/src/kmp_wrapper_malloc.h
+++ b/openmp/runtime/src/kmp_wrapper_malloc.h
@@ -154,7 +154,7 @@
 
 #if KMP_DEBUG
 
-#if KMP_OS_WINDOWS && _DEBUG
+#if KMP_OS_WINDOWS && _DEBUG && !defined(__MINGW32__)
 // KMP_DEBUG != _DEBUG. MS debug RTL is available only if _DEBUG is defined.
 
 // Windows* OS has native memory debugging capabilities. Enable them.