build: provide a clearer message if pkg-config is not installed

diff --git a/configure.ac b/configure.ac
index 995b01d257556c313328ef3a5f7fe5e9975177f0..7c87a55fde37fceabd5fcef90c66f0c20dfec429 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -54,6 +54,10 @@ AC_PROG_LN_S
 AC_PROG_EGREP
 AC_PROG_AWK
 
+# Check for pkg-config
+m4_ifndef([PKG_CHECK_MODULES], [
+  AC_MSG_ERROR([PKG_CHECK_MODULES not found. Please install pkg-config and re-run autogen.sh])])
+
 # Doxygen
 DX_HTML_FEATURE(ON)
 DX_DOT_FEATURE(OFF)