diff -ru4NwbB libpng-1.2.45/Makefile.am libpng-1.2.46/Makefile.am
--- libpng-1.2.45/Makefile.am	2011-07-07 06:53:51.347766499 -0500
+++ libpng-1.2.46/Makefile.am	2011-07-09 05:30:37.523956588 -0500
@@ -73,21 +73,24 @@
 #extra source distribution files.
 EXTRA_DIST= \
 	ANNOUNCE CHANGES INSTALL KNOWNBUG LICENSE README TODO Y2KINFO \
 	pngtest.png pngbar.png pngnow.png pngbar.jpg autogen.sh \
+        CMakeLists.txt \
 	${srcdir}/projects/cbuilder5/* \
 	${srcdir}/projects/beos/* \
 	${srcdir}/projects/visualc6/* \
 	${srcdir}/projects/visualc71/* \
 	${srcdir}/projects/wince.txt \
 	${srcdir}/projects/netware.txt \
+	${srcdir}/projects/xcode/* \
 	${srcdir}/scripts/* \
 	${srcdir}/contrib/gregbook/* \
+	${srcdir}/contrib/pngminim/* \
 	${srcdir}/contrib/pngminus/* \
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.2.46.txt pngvcrd.c
+	example.c libpng-1.2.46.txt pnggccrd.c pngvcrd.c
 
 CLEANFILES= pngout.png libpng12.pc libpng12-config libpng.vers \
 libpng.sym
 
@@ -101,10 +104,9 @@
 	cp libpng-config $@
 
 libpng.sym: png.h pngconf.h
 	rm -f $@ $@.new
-	$(CPP) @LIBPNG_DEFINES@ $(CPPFLAGS) -DPNG_BUILDSYMS $(srcdir)/png.h $(srcdir)/$@
-	cat $(srcdir)/$@ | \
+	$(CPP) @LIBPNG_DEFINES@ $(CPPFLAGS) -DPNG_BUILDSYMS $(srcdir)/png.h | \
 		$(SED) -n -e \
 		's|^.*PNG_FUNCTION_EXPORT[ 	]*\([$(AN)]*\).*$$|$(SYMBOL_PREFIX)\1|p' \
 		-e 's|^.*PNG_DATA_EXPORT[ 	]*\([$(AN)]*\).*$$|$(SYMBOL_PREFIX)\1|p' \
 			>$@.new
diff -ru4NwbB libpng-1.2.45/png.c libpng-1.2.46/png.c
--- libpng-1.2.45/png.c	2011-07-07 06:53:37.120017100 -0500
+++ libpng-1.2.46/png.c	2011-07-09 05:30:23.271567092 -0500
@@ -1,9 +1,9 @@
 
 /* png.c - location for general purpose libpng functions
  *
- * Last changed in libpng 1.2.43 [February 25, 2010]
- * Copyright (c) 1998-2010 Glenn Randers-Pehrson
+ * Last changed in libpng 1.2.46 [February 25, 2011]
+ * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
  *
  * This code is released under the libpng license.
@@ -724,15 +724,15 @@
 #else
 #ifdef __STDC__
    return ((png_charp) PNG_STRING_NEWLINE \
      "libpng version 1.2.46 - July 9, 2011" PNG_STRING_NEWLINE \
-     "Copyright (c) 1998-2010 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
+     "Copyright (c) 1998-2011 Glenn Randers-Pehrson" PNG_STRING_NEWLINE \
      "Copyright (c) 1996-1997 Andreas Dilger" PNG_STRING_NEWLINE \
      "Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc." \
      PNG_STRING_NEWLINE);
 #else
       return ((png_charp) "libpng version 1.2.46 - July 9, 2011\
-      Copyright (c) 1998-2010 Glenn Randers-Pehrson\
+      Copyright (c) 1998-2011 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.");
 #endif
 #endif
diff -ru4NwbB libpng-1.2.45/png.h libpng-1.2.46/png.h
--- libpng-1.2.45/png.h	2011-07-07 06:53:37.095765499 -0500
+++ libpng-1.2.46/png.h	2011-07-09 05:30:23.247015613 -0500
@@ -262,12 +262,15 @@
  *    1.2.44beta01-03         13    10244  12.so.0.44[.0]
  *    1.2.44rc01-03           13    10244  12.so.0.44[.0]
  *    1.2.44                  13    10244  12.so.0.44[.0]
  *    1.2.45beta01-03         13    10245  12.so.0.45[.0]
- *    1.0.55rc01              13    10055  10.so.0.55[.0]
+ *    1.0.55rc01              10    10055  10.so.0.55[.0]
  *    1.2.45rc01              13    10245  12.so.0.45[.0]
- *    1.0.55                  13    10055  10.so.0.55[.0]
+ *    1.0.55                  10    10055  10.so.0.55[.0]
  *    1.2.45                  13    10245  12.so.0.45[.0]
+ *    1.2.46rc01-02           13    10246  12.so.0.46[.0]
+ *    1.0.56                  10    10056  10.so.0.56[.0]
+ *    1.2.46                  13    10246  12.so.0.46[.0]
  *
  *    Henceforth the source version will match the shared-library major
  *    and minor numbers; the shared-library major version number will be
  *    used for changes in backward compatibility, as it is intended.  The
@@ -298,9 +301,9 @@
  *
  * This code is released under the libpng license.
  *
  * libpng versions 1.2.6, August 15, 2004, through 1.2.46, July 9, 2011, are
- * Copyright (c) 2004, 2006-2010 Glenn Randers-Pehrson, and are
+ * Copyright (c) 2004, 2006-2011 Glenn Randers-Pehrson, and are
  * distributed according to the same disclaimer and license as libpng-1.2.5
  * with the following individual added to the list of Contributing Authors:
  *
  *    Cosmin Truta
diff -ru4NwbB libpng-1.2.45/projects/xcode/libpng.xcodeproj/project.pbxproj libpng-1.2.46/projects/xcode/libpng.xcodeproj/project.pbxproj
--- libpng-1.2.45/projects/xcode/libpng.xcodeproj/project.pbxproj	2011-07-07 06:53:38.613174824 -0500
+++ libpng-1.2.46/projects/xcode/libpng.xcodeproj/project.pbxproj	2011-07-09 05:30:24.540767500 -0500
@@ -221,9 +221,9 @@
 			buildSettings = {
 				COPY_PHASE_STRIP = NO;
 				DYLIB_COMPATIBILITY_VERSION = 3;
 				DYLIB_CURRENT_VERSION = 3;
-				FRAMEWORK_VERSION = 1.2.45;
+				FRAMEWORK_VERSION = 1.2.46;
 				GCC_PRECOMPILE_PREFIX_HEADER = NO;
 				GCC_PREFIX_HEADER = "";
 				INFOPLIST_FILE = Info.plist;
 				INSTALL_PATH = "@executable_path/../Frameworks";
@@ -239,9 +239,9 @@
 			isa = XCBuildConfiguration;
 			buildSettings = {
 				DYLIB_COMPATIBILITY_VERSION = 3;
 				DYLIB_CURRENT_VERSION = 3;
-				FRAMEWORK_VERSION = 1.2.45;
+				FRAMEWORK_VERSION = 1.2.46;
 				GCC_PRECOMPILE_PREFIX_HEADER = NO;
 				GCC_PREFIX_HEADER = "";
 				INFOPLIST_FILE = Info.plist;
 				INSTALL_PATH = "@executable_path/../Frameworks";