fixup! mingw: add a cache below mingw's lstat and dirent implementations

Clang has newly developed an antipathy for unions and arrays of structs
that contain flex arrays... Let's just pat clang's head and move on.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

compat/win32/fscache.c

@@ -78,12 +78,15 @@ struct fsentry {
 };
 #pragma GCC diagnostic pop
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wflexible-array-extensions"
 struct heap_fsentry {
 	union {
 		struct fsentry ent;
 		char dummy[sizeof(struct fsentry) + MAX_LONG_PATH];
 	} u;
 };
+#pragma GCC diagnostic pop
 
 /*
  * Compares the paths of two fsentry structures for equality.
@@ -596,7 +599,10 @@ void fscache_flush(void)
 int fscache_lstat(const char *filename, struct stat *st)
 {
 	int dirlen, base, len;
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wflexible-array-extensions"
 	struct heap_fsentry key[2];
+#pragma GCC diagnostic pop
 	struct fsentry *fse;
 	struct fscache *cache = fscache_getcache();