Avoid -Wundef warning

boostorg · Jan 6, 2024 · bdf60d3 · bdf60d3
1 parent bc58e33
commit bdf60d3
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/include/boost/exception/exception.hpp b/include/boost/exception/exception.hpp
@@ -19,7 +19,7 @@ namespace boost { namespace exception_detail { using boost::shared_ptr; } }
 #endif
 
 #if !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
-#if __GNUC__*100+__GNUC_MINOR__>301
+#if defined(__GNUC__) && __GNUC__*100+__GNUC_MINOR__>301
 #pragma GCC system_header
 #endif
 #ifdef __clang__