Add /opt/X11/include to X search path

* lib/autoconf/libs.m4 (_AC_PATH_X_DIRECT):
Add /opt/X11/include for OS X.
Problem reported by Daniel Macks at:
http://lists.gnu.org/archive/html/bug-autoconf/2015-08/msg00002.html

diff --git a/lib/autoconf/libs.m4 b/lib/autoconf/libs.m4
index eab753c549c8507c4d22a91a549dc24b2b516b47..d2040d731f81fc1693e01d118c45d51ad169d56a 100644 (file)
--- a/lib/autoconf/libs.m4
+++ b/lib/autoconf/libs.m4
@@ -238,6 +238,8 @@ ac_x_header_dirs='
 /usr/local/include/X11R5
 /usr/local/include/X11R4
 
+/opt/X11/include
+
 /usr/X386/include
 /usr/x386/include
 /usr/XFree86/include/X11