1Use pkg-config to report libpng version and installation directories. 2 3 4diff -Naur libpng-1.5.5.orig/libpng-config.in libpng-1.5.5/libpng-config.in 5--- libpng-1.5.5.orig/libpng-config.in 2011-09-22 09:40:23.000000000 -0400 6+++ libpng-1.5.5/libpng-config.in 2011-10-05 01:03:32.335435187 -0400 7@@ -11,11 +11,11 @@ 8 9 # Modeled after libxml-config. 10 11-version="@PNGLIB_VERSION@" 12-prefix="@prefix@" 13-exec_prefix="@exec_prefix@" 14-libdir="@libdir@" 15-includedir="@includedir@/libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@" 16+version=`pkg-config --modversion libpng` 17+prefix=`pkg-config --variable prefix libpng` 18+exec_prefix=`pkg-config --variable exec_prefix libpng` 19+libdir=`pkg-config --variable libdir libpng` 20+includedir=`pkg-config --variable includedir libpng` 21 libs="-lpng@PNGLIB_MAJOR@@PNGLIB_MINOR@" 22 all_libs="-lpng@PNGLIB_MAJOR@@PNGLIB_MINOR@ @LIBS@" 23 I_opts="-I${includedir}" 24