Set dummy names for PNGLIB, PNGHDR_DIR when libpng-config exists

git-svn-id: http://svn.code.sf.net/p/netpbm/code/trunk@2849 9d0c8265-081b-0410-96cb-a4ca84ce46f8

1 files changed, 6 insertions, 0 deletions

diff --git a/buildtools/configure.pl b/buildtools/configure.pl
index 6bedf189..332113d5 100755
--- a/buildtools/configure.pl
+++ b/buildtools/configure.pl
@@ -1168,6 +1168,12 @@ sub getPngLibrary($@) {
         # We don't need to ask where Libpng is; there's a 'libpng-config'
         # That tells exactly how to access it, and the make files will use
         # that.
+        #
+        # To limit the confusion when someone tries to use our result in
+        # spite of the fact that 'libpng-config' exists, we assign suggestive
+        # dummy values.
+        $pnglib     = 'USE_LIBPNG-CONFIG.a';
+        $pnghdr_dir = 'USE_LIBPNG-CONFIG.a';
     } else {
         {
             my $default = "libpng" . libSuffix($platform);