use g_mkdir()

we had our own compat stuff, use the g_() one instead

configure.ac

@@ -306,7 +306,6 @@ AC_TYPE_SIZE_T
 # Checks for library functions.
 AC_FUNC_MEMCMP
 AC_FUNC_MMAP
-AC_FUNC_MKDIR
 AC_FUNC_VPRINTF
 AC_CHECK_FUNCS([getcwd gettimeofday getwd memset munmap putenv realpath strcasecmp strchr strcspn strdup strerror strrchr strspn vsnprintf realpath mkstemp mktemp random rand sysconf atexit])
 AC_CHECK_LIB(m,cbrt,[AC_DEFINE(HAVE_CBRT,1,[have cbrt() in libm.])])

libvips/iofuncs/util.c

@@ -1185,23 +1185,6 @@ vips_popenf( const char *fmt, const char *mode, ... )
 	return( fp );
 }
 
-/* Handle broken mkdirs()
- */
-#if HAVE_MKDIR
-# if MKDIR_TAKES_ONE_ARG
-   /* Mingw32 */
-#  define mkdir(a,b) mkdir(a)
-# endif
-#else
-# ifdef HAVE__MKDIR
-   /* plain Win32 */
-#  include <direct.h>
-#  define mkdir(a,b) _mkdir(a)
-# else
-#  error "Don't know how to create a directory on this system."
-# endif
-#endif
-
 /* Make a directory.
  */
 int
@@ -1216,7 +1199,7 @@ vips_mkdirf( const char *name, ... )
 
         /* Try that.
          */
-        if( mkdir( buf1, 0755 ) ) {
+        if( g_mkdir( buf1, 0755 ) ) {
 		vips_error( "mkdirf", 
 			_( "unable to create directory \"%s\", %s" ), 
 			buf1, strerror( errno ) );