configure: Check for pkg-config before using it

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/configure.ac b/configure.ac
index f1b87f5480d7ed88523e167666acc6b597d79b1f..831a7e7b1d4c308dee569dc5fd4feecce3b8cca0 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -131,6 +131,13 @@ AC_CHECK_FUNCS([ \
 
 AC_PATH_PROG([XSLTPROC], [xsltproc])
 
+# pkg-config
+PKG_PROG_PKG_CONFIG
+
+# This makes sure pkg.m4 is available.
+m4_pattern_forbid([^_?PKG_[A-Z_]+$],[*** pkg.m4 missing, please install pkg-config])
+
+# Check for core dependencies
 PKG_CHECK_MODULES([RRD], [librrd])
 PKG_CHECK_MODULES([SYSTEMD], [libsystemd])
 
@@ -154,11 +161,6 @@ AC_SUBST(SENSORS_LIBS)
 
 LIBS="$save_LIBS"
 
-# pkg-config
-PKG_PROG_PKG_CONFIG
-# This makes sure pkg.m4 is available.
-m4_pattern_forbid([^_?PKG_[A-Z_]+$],[*** pkg.m4 missing, please install pkg-config])
-
 # ------------------------------------------------------------------------------
 have_manpages=no
 AC_ARG_ENABLE(manpages, AS_HELP_STRING([--disable-man-pages],