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-rw-r--r--xorg-macros.m4.in4
1 files changed, 4 insertions, 0 deletions
diff --git a/xorg-macros.m4.in b/xorg-macros.m4.in
index 2ea2e6f..06f7c9d 100644
--- a/xorg-macros.m4.in
+++ b/xorg-macros.m4.in
@@ -80,6 +80,10 @@ else
if test `${RAWCPP} -undef < conftest.$ac_ext | grep -c 'unix'` -eq 1 ; then
RAWCPPFLAGS=-undef
AC_MSG_RESULT([yes])
+ # under Cygwin unix is still defined even with -undef
+ elif test `${RAWCPP} -undef -ansi < conftest.$ac_ext | grep -c 'unix'` -eq 1 ; then
+ RAWCPPFLAGS="-undef -ansi"
+ AC_MSG_RESULT([yes, with -ansi])
else
AC_MSG_ERROR([${RAWCPP} defines unix with or without -undef. I don't know what to do.])
fi