Define pragma clang only with clang comiler.

711400a5 · TESLA01\soerenpeters · 78e31468 · 711400a5
Commit 711400a5 authored 4 years ago by $TESLA01\soerenpeters's avatar$ TESLA01\soerenpeters
--- a/3rdParty/metis/metis-5.1.1/include/metis.h
+++ b/3rdParty/metis/metis-5.1.1/include/metis.h
@@ -10,7 +10,10 @@
 #ifndef _METIS_H_
 #define _METIS_H_ 
+#ifdef __clang__
 #pragma clang system_header
+#endif
 /****************************************************************************
 * A set of defines that can be modified by the user