closes https://github.com/assimp/assimp/issues/3252: fix build.

code/AssetLib/3DS/3DSHelper.h

@@ -321,7 +321,7 @@ public:
 struct Face : public FaceWithSmoothingGroup {
 };
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #pragma warning(disable : 4315)
 #endif
 

code/AssetLib/IFC/IFCReaderGen_2x3.h

@@ -45,7 +45,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "AssetLib/Step/STEPFile.h"
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #    pragma warning( disable : 4512 )
 #endif // _WIN32
 

code/AssetLib/M3D/m3d.h

@@ -85,7 +85,9 @@ typedef uint16_t M3D_INDEX;
 #define M3D_BONEMAXLEVEL 8
 #endif
 #ifndef _MSC_VER
+#ifndef _inline
 #define _inline __inline__
+#endif
 #define _pack __attribute__((packed))
 #define _unused __attribute__((unused))
 #else
@@ -99,7 +101,7 @@ typedef uint16_t M3D_INDEX;
 #define _register
 #endif
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #    pragma warning(push)
 #    pragma warning(disable : 4100 4127 4189 4505 4244 4403  4701 4703)
 #    if (_MSC_VER > 1800 )

code/AssetLib/MDL/HalfLife/HL1MDLLoader.cpp

@@ -68,8 +68,8 @@ namespace Assimp {
 namespace MDL {
 namespace HalfLife {
 
-#ifdef _WIN32
-#    pragma warning(disable : 4706) 
+#if _MSC_VER > 1920
+#    pragma warning(disable : 4706)
 #endif // _WIN32
 
 // ------------------------------------------------------------------------------------------------

code/AssetLib/Step/STEPFile.h

@@ -54,7 +54,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include <assimp/DefaultLogger.hpp>
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #    pragma warning(push)
 #    pragma warning(disable : 4127 4456 4245 4512 )
 #endif // _WIN32 
@@ -727,7 +727,7 @@ struct InternGenericConvert<Maybe<T>> {
     }
 };
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #pragma warning(push)
 #pragma warning(disable : 4127)
 #endif // _WIN32
@@ -960,7 +960,7 @@ private:
     const EXPRESS::ConversionSchema *schema;
 };
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #pragma warning(pop)
 #endif // _WIN32
 

code/Common/Exporter.cpp

@@ -74,8 +74,8 @@ Here we implement only the C++ interface (Assimp::Exporter).
 
 namespace Assimp {
 
-#ifdef _WIN32
-#    pragma warning( disable : 4800 ) 
+#if _MSC_VER > 1920
+#    pragma warning( disable : 4800 )
 #endif // _WIN32
 
 

code/Common/Subdivision.cpp

@@ -53,7 +53,7 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 using namespace Assimp;
 void mydummy() {}
 
-#ifdef _WIN32
+#if _MSC_VER > 1920
 #pragma warning(disable : 4709)
 #endif // _WIN32
 // ------------------------------------------------------------------------------------------------