commit a0ed82947c83a64ff8b85bca638e137e5466bd98
author Vinson Lee <vlee@freedesktop.org> Sat Aug 05 13:31:50 2017 -0700
committer Vinson Lee <vlee@freedesktop.org> Thu Aug 17 00:11:27 2017 -0700
tree 428a666b3680ab5b7adaa005b7ca530e55ae4e8c
parent 2c5717a4de2a2406a7e155de641921571a3910c7

configure.ac: Check for expat21 if expat is not found.

Fixes build error on CentOS 6.9.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102052
Fixes: 5c007203b73d ("configure.ac: drop manual detection of expat header/library")
Signed-off-by: Vinson Lee <vlee@freedesktop.org>

configure.ac

diff --git a/configure.ac b/configure.ac
index 52645bb..53d52f6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1814,7 +1814,9 @@
 fi
 
 # Check for expat
-PKG_CHECK_MODULES([EXPAT], [expat])
+PKG_CHECK_MODULES([EXPAT], [expat],,
+    [PKG_CHECK_MODULES([EXPAT], [expat21])]
+)
 
 dnl If $with_dri_drivers is yes, drivers will be added through
 dnl platform checks. Set DEFINES and LIB_DEPS