CentOS 5.11 pkg-config fix

Check for the minimal pkg-config 0.21 version. Without it, CentOS'
pkg-config will fail with the warning:

configure: error: The pkg-config script could not be found or is too old.

diff --git a/configure.ac b/configure.ac
index 0cbba4477128e9476e8eb4486a8c480afcb580eb..ec2941ce87c1560f221f5755b61e03087aa24d30 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -11,6 +11,7 @@
     AC_LANG_C
     AC_PROG_CC_C99
     AC_PROG_LIBTOOL
+    PKG_PROG_PKG_CONFIG(0.21) # 0.21 is the CentOS 5.11 version
 
     AC_DEFUN([FAIL_MESSAGE],[
             echo