build: no need for error message in PKG_CHECK_MODULES

PKG_CHECK_MODULES already produces its own (and more verbose) messsage
when a module cannot be found.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

diff --git a/configure.ac b/configure.ac
index fec034ef08bad3849d2346779610cd7b494824c9..75372fc0d6a4b1f605072e68821d1ef71b818a40 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -36,16 +36,9 @@ regular_CFLAGS="-Wall -Wextra -Wno-unused-parameter"
 AC_SUBST([regular_CFLAGS])
 
 dnl Check for the right nfnetlink version
-LIBNFNETLINK_REQUIRED=0.0.39
-LIBNETFILTER_CONNTRACK_REQUIRED=0.0.95
-LIBNETFILTER_LOG_REQUIRED=1.0.0
-
-PKG_CHECK_MODULES(LIBNFNETLINK, libnfnetlink >= $LIBNFNETLINK_REQUIRED,, AC_MSG_ERROR(Cannot find libnfnetlink >= $LIBNFNETLINK_REQUIRED))
-
-PKG_CHECK_MODULES(LIBNETFILTER_CONNTRACK, libnetfilter_conntrack >= $LIBNETFILTER_CONNTRACK_REQUIRED,, AC_MSG_ERROR(Cannot find libnetfilter_conntrack >= $LIBNETFILTER_CONNTRACK_REQUIRED))
-
-PKG_CHECK_MODULES(LIBNETFILTER_LOG, libnetfilter_log >= $LIBNETFILTER_LOG_REQUIRED,, AC_MSG_ERROR(Cannot find libnetfilter_log >= $LIBNETFILTER_LOG_REQUIRED))
-
+PKG_CHECK_MODULES([LIBNFNETLINK], [libnfnetlink >= 0.0.39])
+PKG_CHECK_MODULES([LIBNETFILTER_CONNTRACK], [libnetfilter_conntrack >= 0.0.95])
+PKG_CHECK_MODULES([LIBNETFILTER_LOG], [libnetfilter_log >= 1.0.0])
 
 CT_CHECK_POSTGRES_DB()
 AM_CONDITIONAL(HAVE_PGSQL, test "x$PQLIBPATH" != "x")