Commit 9e40646cf3a7d0817b2298f915399a128fcb4d27
2021-02-03T21:01:24
Fix noinline for older compiler versions (e.g. Visual Studio 6.0) Visual Studio 6.0 does not support __declspec(noinline) and throw error. Add checks for compilers which support noinline to prevent compile errors.
diff --git a/src/dlfcn.c b/src/dlfcn.c
index c4f410d..86f24df 100644
--- a/src/dlfcn.c
+++ b/src/dlfcn.c
@@ -61,6 +61,16 @@ typedef ULONG ULONG_PTR;
#endif
#include "dlfcn.h"
+#if defined( _MSC_VER ) && _MSC_VER >= 1300
+/* https://docs.microsoft.com/en-us/cpp/cpp/noinline */
+#define DLFCN_NOINLINE __declspec( noinline )
+#elif defined( __GNUC__ ) && ( ( __GNUC__ > 3 ) || ( __GNUC__ == 3 && __GNUC_MINOR__ >= 1 ) )
+/* https://gcc.gnu.org/onlinedocs/gcc/Common-Function-Attributes.html */
+#define DLFCN_NOINLINE __attribute__(( noinline ))
+#else
+#define DLFCN_NOINLINE
+#endif
+
/* Note:
* MSDN says these functions are not thread-safe. We make no efforts to have
* any kind of thread safety.
@@ -418,7 +428,7 @@ int dlclose( void *handle )
return (int) ret;
}
-__declspec(noinline) /* Needed for _ReturnAddress() */
+DLFCN_NOINLINE /* Needed for _ReturnAddress() */
DLFCN_EXPORT
void *dlsym( void *handle, const char *name )
{