configure.ac: drop manual detection of expat header/library

Use the .pc file, as provided by version prior 2.1.0 onward and dropping
the manual header/library check.

Version 2.1.0 was released back in Mar 2012 and all major distributions
use it.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com> (IRC)

diff --git a/configure.ac b/configure.ac
index 21092abebf7132edbc7ab34e0655c59bb46fbb08..5b12dd8506a55776921ce33908c51296f5ee8531 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1792,13 +1792,7 @@ if test "x$with_dri_drivers" = xno; then
 fi
 
 # Check for expat
-PKG_CHECK_MODULES([EXPAT], [expat], [],
-    # expat version 2.0 and earlier do not provide expat.pc
-    [AC_CHECK_HEADER([expat.h],[],
-                     [AC_MSG_ERROR([Expat headers required for DRI not found])])
-     AC_CHECK_LIB([expat],[XML_ParserCreate],[],
-                 [AC_MSG_ERROR([Expat library required for DRI not found])])
-     EXPAT_LIBS="-lexpat"])
+PKG_CHECK_MODULES([EXPAT], [expat])
 
 dnl If $with_dri_drivers is yes, drivers will be added through
 dnl platform checks. Set DEFINES and LIB_DEPS