Remove MinGW support

The Issue
=======

For a long time now MinGW has been unsupported and unmaintained and at this point,
it looks like something that we should just leave behind and move on.


Why Remove
==========

One of the big motivations for MinGW back in the day is that it was free compared to MSVC which was licensed based.
However, now that this is no longer true we have basically stopped updating the need CMake files.
Along with the CMake files, there are several patches to the extern libs needed to make this work.  For example, see:
https://developer.blender.org/diffusion/B/browse/master/extern/carve/patches/mingw_w64.patch

If we wanted to keep MinGW then we would need to make more custom patches to the external libs and
this is not something our platform maintainers are willing to do.

For example, here is the patches needed to build python: https://github.com/Alexpux/MINGW-packages/tree/master/mingw-w64-python3

Fixes T51301

Differential Revision: https://developer.blender.org/D2648

1 files changed, 12 insertions, 24 deletions

diff --git a/source/blender/blenlib/intern/storage.c b/source/blender/blenlib/intern/storage.c
index 3edc00a8c1a..48280c14d7d 100644
--- a/source/blender/blenlib/intern/storage.c
+++ b/source/blender/blenlib/intern/storage.c
@@ -113,7 +113,7 @@ double BLI_dir_free_space(const char *dir)
 #ifdef WIN32
 	DWORD sectorspc, bytesps, freec, clusters;
 	char tmp[4];
-	
+
 	tmp[0] = '\\'; tmp[1] = 0; /* Just a failsafe */
 	if (dir[0] == '/' || dir[0] == '\\') {
 		tmp[0] = '\\';
@@ -139,10 +139,10 @@ double BLI_dir_free_space(const char *dir)
 
 	char name[FILE_MAXDIR], *slash;
 	int len = strlen(dir);
-	
+
 	if (len >= FILE_MAXDIR) /* path too long */
 		return -1;
-	
+
 	strcpy(name, dir);
 
 	if (len) {
@@ -194,7 +194,7 @@ size_t BLI_file_size(const char *path)
  */
 int BLI_exists(const char *name)
 {
-#if defined(WIN32) 
+#if defined(WIN32)
 	BLI_stat_t st;
 	wchar_t *tmp_16 = alloc_utf16_from_8(name, 1);
 	int len, res;
@@ -253,10 +253,8 @@ int BLI_stat(const char *path, BLI_stat_t *buffer)
 
 int BLI_wstat(const wchar_t *path, BLI_stat_t *buffer)
 {
-#if defined(_MSC_VER) || defined(__MINGW64__)
+#if defined(_MSC_VER)
 	return _wstat64(path, buffer);
-#elif defined(__MINGW32__)
-	return _wstati64(path, buffer);
 #else
 	return _wstat(path, buffer);
 #endif
@@ -372,7 +370,7 @@ LinkNode *BLI_file_read_as_lines(const char *name)
 	size_t size;
 
 	if (!fp) return NULL;
-		
+
 	fseek(fp, 0, SEEK_END);
 	size = (size_t)ftell(fp);
 	fseek(fp, 0, SEEK_SET);
@@ -385,7 +383,7 @@ LinkNode *BLI_file_read_as_lines(const char *name)
 	buf = MEM_mallocN(size, "file_as_lines");
 	if (buf) {
 		size_t i, last = 0;
-		
+
 		/*
 		 * size = because on win32 reading
 		 * all the bytes in the file will return
@@ -403,10 +401,10 @@ LinkNode *BLI_file_read_as_lines(const char *name)
 				last = i + 1;
 			}
 		}
-		
+
 		MEM_freeN(buf);
 	}
-	
+
 	fclose(fp);
 
 	return lines.list;
@@ -424,23 +422,13 @@ void BLI_file_free_lines(LinkNode *lines)
 bool BLI_file_older(const char *file1, const char *file2)
 {
 #ifdef WIN32
-#ifndef __MINGW32__
-	struct _stat st1, st2;
-#else
-	struct _stati64 st1, st2;
-#endif
+  struct _stat st1, st2;
 
 	UTF16_ENCODE(file1);
 	UTF16_ENCODE(file2);
-	
-#ifndef __MINGW32__
-	if (_wstat(file1_16, &st1)) return false;
-	if (_wstat(file2_16, &st2)) return false;
-#else
-	if (_wstati64(file1_16, &st1)) return false;
-	if (_wstati64(file2_16, &st2)) return false;
-#endif
 
+	if (_wstat(file1_16, &st1)) return false;
+  if (_wstat(file2_16, &st2)) return false;
 
 	UTF16_UN_ENCODE(file2);
 	UTF16_UN_ENCODE(file1);