detect simd support based on standard version instead of compiler

Author: pcarruscag

Common/include/omp_structure.hpp

@@ -55,6 +55,11 @@
 /*--- The generic start of OpenMP constructs. ---*/
 #define SU2_OMP(ARGS) PRAGMIZE(omp ARGS)
 
+/*--- Detect SIMD support (version 4+, after Jul 2013). ---*/
+#if _OPENMP >= 201307
+#define HAVE_OMP_SIMD
+#endif
+
 #else // Compile without OpenMP
 
 /*--- Disable pragmas to quiet compilation warnings. ---*/
@@ -110,8 +115,8 @@ inline void omp_destroy_lock(omp_lock_t*){}
 #define SU2_OMP_FOR_DYN(CHUNK) SU2_OMP(for schedule(dynamic,CHUNK))
 #define SU2_OMP_FOR_STAT(CHUNK) SU2_OMP(for schedule(static,CHUNK))
 
-/*--- Disable some unsupported features on MSVC. ---*/
-#if defined(_MSC_VER)
+/*--- Disable some unsupported features. ---*/
+#ifndef HAVE_OMP_SIMD
 #undef SU2_OMP_SIMD
 #define SU2_OMP_SIMD
 #endif

Common/src/linear_algebra/CSysVector.cpp

@@ -40,10 +40,9 @@
  * CSysVector and do not have the same work scheduling must use a
  * SU2_OMP_BARRIER before using the vector.
  */
-#ifndef _MSC_VER
+#ifdef HAVE_OMP_SIMD
 #define PARALLEL_FOR SU2_OMP(for simd schedule(static,omp_chunk_size) nowait)
 #else
-/*--- MSVC does not support SIMD by default. ---*/
 #define PARALLEL_FOR SU2_OMP(for schedule(static,omp_chunk_size) nowait)
 #endif