Merge commit '7f9e893f'

* commit '7f9e893f':
  build: Report an error message when a pc file is not found

Conflicts:
	configure
Merged-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -995,7 +995,7 @@ check_pkg_config(){
     headers="$2"
     funcs="$3"
     shift 3
-    $pkg_config --exists $pkg 2>/dev/null || return
+    check_cmd $pkg_config --exists --print-errors $pkg || return
     pkg_cflags=$($pkg_config --cflags $pkg)
     pkg_libs=$($pkg_config --libs $pkg)
     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&