CONFIGURE: Error out when host-os is msys.

The msys shell can be run in both msys and in mingw mode. We don't
support it when in msys mode, as this mode seems to be intended as a
cygwin-like compatibility layer, instead of for native Windows
applications.

1 files changed, 4 insertions, 0 deletions

diff --git a/configure b/configure
index 1af8c29729..88b84566cf 100755
--- a/configure
+++ b/configure
@@ -2443,6 +2443,10 @@ case $_host_os in
 	mint*)
 		append_var DEFINES "-DSYSTEM_NOT_SUPPORTING_D_TYPE"
 		;;
+	msys)
+		echo ERROR: Using the MSYS shell in msys mode is not supported. Please use the MSYS shell in mingw mode instead.
+		exit 1
+		;;
 	n64)
 		append_var DEFINES "-D__N64__"
 		append_var DEFINES "-DLIMIT_FPS"