[PATCH wayland 2/2] build: Remove support for non-pkg-config Expat

[Daniel Stone]

The Expat XML library has shipped a pkg-config file for long enough to
be in Debian's oldstable (Jessie, April 2015) and Ubuntu's oldest
supported LTS (Trusty, 14.04). The pkg-config file was added in Expat
upstream's commit 352cfc8f59a7, in September 2007.

Drop build support for versions of Expat which do not ship a
pkg-config file.

Signed-off-by: Daniel Stone <daniels at collabora.com>
---
 configure.ac | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/configure.ac b/configure.ac
index 8c2fb822..0022dcda 100644
--- a/configure.ac
+++ b/configure.ac
@@ -111,16 +111,7 @@ if test "x$enable_libraries" = "xyes"; then
 		      [[#include <time.h>]])
 fi
 
-PKG_CHECK_MODULES(EXPAT, [expat], [],
-	[AC_CHECK_HEADERS(expat.h, [],
-		[AC_MSG_ERROR([Can't find expat.h. Please install expat.])])
-	 SAVE_LIBS="$LIBS"
-	 AC_SEARCH_LIBS(XML_ParserCreate, expat, [],
-		[AC_MSG_ERROR([Can't find expat library. Please install expat.])])
-	 EXPAT_LIBS="$LIBS"
-	 LIBS="$SAVE_LIBS"
-	 AC_SUBST(EXPAT_LIBS)
-	])
+PKG_CHECK_MODULES(EXPAT, [expat])
 
 AM_CONDITIONAL([DTD_VALIDATION], [test "x$enable_dtd_validation" = "xyes"])
 if test "x$enable_dtd_validation" = "xyes"; then
-- 
2.17.1