Ease tracking path problems.
---
 configure | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/configure b/configure
index 5ba8f9f..0a0465e 100755
--- a/configure
+++ b/configure
@@ -886,7 +886,10 @@ check_pkg_config(){
     headers="$2"
     funcs="$3"
     shift 3
-    $pkg_config --exists $pkg || return
+    $pkg_config --exists $pkg || {
+        log $pkg_config cannot find $pkg in $PKG_CONFIG_PATH
+        return 1
+    }
     pkg_cflags=$($pkg_config --cflags $pkg)
     pkg_libs=$($pkg_config --libs $pkg)
     check_func_headers "$headers" "$funcs" $pkg_cflags $pkg_libs "$@" &&
-- 
1.8.3.2

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