Use pkg-config to report libpng12 version and installation directories.


diff -Naur libpng-1.2.49.orig/scripts/libpng-config.in libpng-1.2.49/scripts/libpng-config.in
--- libpng-1.2.49.orig/scripts/libpng-config.in	2012-03-29 00:46:55.000000000 -0400
+++ libpng-1.2.49/scripts/libpng-config.in	2012-08-01 15:03:50.564507346 -0400
@@ -11,11 +11,11 @@
 
 # Modeled after libxml-config.
 
-version="@PNGLIB_VERSION@"
-prefix="@prefix@"
-exec_prefix="@exec_prefix@"
-libdir="@libdir@"
-includedir="@includedir@/libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@"
+version=`pkg-config --modversion libpng12`
+prefix=`pkg-config --variable prefix libpng12`
+exec_prefix=`pkg-config --variable exec_prefix libpng12`
+libdir=`pkg-config --variable libdir libpng12`
+includedir=`pkg-config --variable includedir libpng12`
 libs="-lpng@PNGLIB_MAJOR@@PNGLIB_MINOR@"
 all_libs="-lpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ @LIBS@"
 I_opts="-I${includedir}"
diff -Naur libpng-1.2.49.orig/scripts/libpng.pc-configure.in libpng-1.2.49/scripts/libpng.pc-configure.in
--- libpng-1.2.49.orig/scripts/libpng.pc-configure.in	2012-03-29 00:46:55.000000000 -0400
+++ libpng-1.2.49/scripts/libpng.pc-configure.in	2012-08-01 15:04:37.817786337 -0400
@@ -3,7 +3,7 @@
 libdir=@libdir@
 includedir=@includedir@/libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@
 
-Name: libpng
+Name: libpng12
 Description: Loads and saves PNG files
 Version: @PNGLIB_VERSION@
 Libs: -L${libdir} -lpng@PNGLIB_MAJOR@@PNGLIB_MINOR@