X-Git-Url: https://wimlib.net/git/?p=wimlib;a=blobdiff_plain;f=Makefile.am;h=45a85af82597b50324234a3618e21ecc16d1c9b5;hp=75ed97168a1f8f8c3d4565235aca651541559b22;hb=19fd5bbc4f64cc8bf735f7c2c0bb864876998cf4;hpb=f5d26d6005ba759762bec8c7cd45a738e577a8a7

diff --git a/Makefile.am b/Makefile.am
index 75ed9716..45a85af8 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -7,6 +7,11 @@ AM_CFLAGS	= -std=gnu99 -Wmissing-prototypes -Wstrict-prototypes	\
 		  -Werror-implicit-function-declaration			\
 		  -fno-common -Wundef -Wno-pointer-sign
 
+if WINDOWS_NATIVE_BUILD
+# This option is needed to make packed structures work as expected
+# with gcc 4.7+ (mingw) on Windows.
+AM_CFLAGS += -mno-ms-bitfields
+endif
 
 lib_LTLIBRARIES = libwim.la