diff --git a/LICENSE b/LICENSE
index 8b35a65..ac8e3ad 100644
--- a/LICENSE
+++ b/LICENSE
@@ -10,7 +10,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.5.15beta03, February 5, 2013, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.15beta03, February 7, 2013, are
 Copyright (c) 2004, 2006-2012 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
@@ -108,4 +108,4 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-February 5, 2013
+February 7, 2013
diff --git a/Makefile.in b/Makefile.in
index 7fda1e1..6d66b5c 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -71,8 +71,8 @@
 	$(top_srcdir)/configure $(am__configure_deps) \
 	$(srcdir)/config.h.in $(srcdir)/libpng.pc.in \
 	$(srcdir)/libpng-config.in depcomp $(dist_man_MANS) \
-	$(pkginclude_HEADERS) test-driver INSTALL README TODO \
-	config.guess config.sub install-sh missing ltmain.sh
+	$(pkginclude_HEADERS) INSTALL README TODO config.guess \
+	config.sub install-sh missing ltmain.sh
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
 am__aclocal_m4_deps = $(top_srcdir)/configure.ac
 am__configure_deps = $(am__aclocal_m4_deps) $(CONFIGURE_DEPENDENCIES) \
@@ -243,7 +243,7 @@
 ETAGS = etags
 CTAGS = ctags
 CSCOPE = cscope
-AM_RECURSIVE_TARGETS = cscope check recheck
+AM_RECURSIVE_TARGETS = cscope
 am__tty_colors_dummy = \
   mgn= red= grn= lgn= blu= brg= std=; \
   am__color_tests=no
@@ -266,160 +266,6 @@
     std='[m'; \
   fi; \
 }
-am__recheck_rx = ^[ 	]*:recheck:[ 	]*
-am__global_test_result_rx = ^[ 	]*:global-test-result:[ 	]*
-am__copy_in_global_log_rx = ^[ 	]*:copy-in-global-log:[ 	]*
-# A command that, given a newline-separated list of test names on the
-# standard input, print the name of the tests that are to be re-run
-# upon "make recheck".
-am__list_recheck_tests = $(AWK) '{ \
-  recheck = 1; \
-  while ((rc = (getline line < ($$0 ".trs"))) != 0) \
-    { \
-      if (rc < 0) \
-        { \
-          if ((getline line2 < ($$0 ".log")) < 0) \
-	    recheck = 0; \
-          break; \
-        } \
-      else if (line ~ /$(am__recheck_rx)[nN][Oo]/) \
-        { \
-          recheck = 0; \
-          break; \
-        } \
-      else if (line ~ /$(am__recheck_rx)[yY][eE][sS]/) \
-        { \
-          break; \
-        } \
-    }; \
-  if (recheck) \
-    print $$0; \
-  close ($$0 ".trs"); \
-  close ($$0 ".log"); \
-}'
-# A command that, given a newline-separated list of test names on the
-# standard input, create the global log from their .trs and .log files.
-am__create_global_log = $(AWK) ' \
-function fatal(msg) \
-{ \
-  print "fatal: making $@: " msg | "cat >&2"; \
-  exit 1; \
-} \
-function rst_section(header) \
-{ \
-  print header; \
-  len = length(header); \
-  for (i = 1; i <= len; i = i + 1) \
-    printf "="; \
-  printf "\n\n"; \
-} \
-{ \
-  copy_in_global_log = 1; \
-  global_test_result = "RUN"; \
-  while ((rc = (getline line < ($$0 ".trs"))) != 0) \
-    { \
-      if (rc < 0) \
-         fatal("failed to read from " $$0 ".trs"); \
-      if (line ~ /$(am__global_test_result_rx)/) \
-        { \
-          sub("$(am__global_test_result_rx)", "", line); \
-          sub("[ 	]*$$", "", line); \
-          global_test_result = line; \
-        } \
-      else if (line ~ /$(am__copy_in_global_log_rx)[nN][oO]/) \
-        copy_in_global_log = 0; \
-    }; \
-  if (copy_in_global_log) \
-    { \
-      rst_section(global_test_result ": " $$0); \
-      while ((rc = (getline line < ($$0 ".log"))) != 0) \
-      { \
-        if (rc < 0) \
-          fatal("failed to read from " $$0 ".log"); \
-        print line; \
-      }; \
-      printf "\n"; \
-    }; \
-  close ($$0 ".trs"); \
-  close ($$0 ".log"); \
-}'
-# Restructured Text title.
-am__rst_title = { sed 's/.*/   &   /;h;s/./=/g;p;x;s/ *$$//;p;g' && echo; }
-# Solaris 10 'make', and several other traditional 'make' implementations,
-# pass "-e" to $(SHELL), and POSIX 2008 even requires this.  Work around it
-# by disabling -e (using the XSI extension "set +e") if it's set.
-am__sh_e_setup = case $$- in *e*) set +e;; esac
-# Default flags passed to test drivers.
-am__common_driver_flags = \
-  --color-tests "$$am__color_tests" \
-  --enable-hard-errors "$$am__enable_hard_errors" \
-  --expect-failure "$$am__expect_failure"
-# To be inserted before the command running the test.  Creates the
-# directory for the log if needed.  Stores in $dir the directory
-# containing $f, in $tst the test, in $log the log.  Executes the
-# developer- defined test setup AM_TESTS_ENVIRONMENT (if any), and
-# passes TESTS_ENVIRONMENT.  Set up options for the wrapper that
-# will run the test scripts (or their associated LOG_COMPILER, if
-# thy have one).
-am__check_pre = \
-$(am__sh_e_setup);					\
-$(am__vpath_adj_setup) $(am__vpath_adj)			\
-$(am__tty_colors);					\
-srcdir=$(srcdir); export srcdir;			\
-case "$@" in						\
-  */*) am__odir=`echo "./$@" | sed 's|/[^/]*$$||'`;;	\
-    *) am__odir=.;; 					\
-esac;							\
-test "x$$am__odir" = x"." || test -d "$$am__odir" 	\
-  || $(MKDIR_P) "$$am__odir" || exit $$?;		\
-if test -f "./$$f"; then dir=./;			\
-elif test -f "$$f"; then dir=;				\
-else dir="$(srcdir)/"; fi;				\
-tst=$$dir$$f; log='$@'; 				\
-if test -n '$(DISABLE_HARD_ERRORS)'; then		\
-  am__enable_hard_errors=no; 				\
-else							\
-  am__enable_hard_errors=yes; 				\
-fi; 							\
-case " $(XFAIL_TESTS) " in				\
-  *[\ \	]$$f[\ \	]* | *[\ \	]$$dir$$f[\ \	]*) \
-    am__expect_failure=yes;;				\
-  *)							\
-    am__expect_failure=no;;				\
-esac; 							\
-$(AM_TESTS_ENVIRONMENT) $(TESTS_ENVIRONMENT)
-# A shell command to get the names of the tests scripts with any registered
-# extension removed (i.e., equivalently, the names of the test logs, with
-# the '.log' extension removed).  The result is saved in the shell variable
-# '$bases'.  This honors runtime overriding of TESTS and TEST_LOGS.  Sadly,
-# we cannot use something simpler, involving e.g., "$(TEST_LOGS:.log=)",
-# since that might cause problem with VPATH rewrites for suffix-less tests.
-# See also 'test-harness-vpath-rewrite.sh' and 'test-trs-basic.sh'.
-am__set_TESTS_bases = \
-  bases='$(TEST_LOGS)'; \
-  bases=`for i in $$bases; do echo $$i; done | sed 's/\.log$$//'`; \
-  bases=`echo $$bases`
-RECHECK_LOGS = $(TEST_LOGS)
-TEST_SUITE_LOG = test-suite.log
-TEST_EXTENSIONS = @EXEEXT@ .test
-LOG_DRIVER = $(SHELL) $(top_srcdir)/test-driver
-LOG_COMPILE = $(LOG_COMPILER) $(AM_LOG_FLAGS) $(LOG_FLAGS)
-am__set_b = \
-  case '$@' in \
-    */*) \
-      case '$*' in \
-        */*) b='$*';; \
-          *) b=`echo '$@' | sed 's/\.log$$//'`; \
-       esac;; \
-    *) \
-      b='$*';; \
-  esac
-am__test_logs1 = $(TESTS:=.log)
-am__test_logs2 = $(am__test_logs1:@EXEEXT@.log=.log)
-TEST_LOGS = $(am__test_logs2:.test.log=.log)
-TEST_LOG_DRIVER = $(SHELL) $(top_srcdir)/test-driver
-TEST_LOG_COMPILE = $(TEST_LOG_COMPILER) $(AM_TEST_LOG_FLAGS) \
-	$(TEST_LOG_FLAGS)
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 distdir = $(PACKAGE)-$(VERSION)
 top_distdir = $(distdir)
@@ -632,7 +478,7 @@
 	CMakeLists.txt example.c libpng-manual.txt
 
 SCRIPT_CLEANFILES = scripts/*.out scripts/*.chk scripts/pnglibconf.dfn
-CLEANFILES= dfn.c dfn?.out *.out.? scripts/*.out.? pngout.png \
+CLEANFILES = dfn.c dfn?.out *.out.? scripts/*.out.? pngout.png \
 	libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc \
 	libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config libpng.vers libpng.sym \
 	check.new pnglibconf.* symbols.new pngtest-log.txt \
@@ -655,7 +501,7 @@
 	$(MAKE) $(AM_MAKEFLAGS) all-am
 
 .SUFFIXES:
-.SUFFIXES: .chk .dfn .out .S .c .lo .log .o .obj .test .test$(EXEEXT) .trs
+.SUFFIXES: .chk .dfn .out .S .c .lo .o .obj
 am--refresh: Makefile
 	@:
 $(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__configure_deps)
@@ -1215,182 +1061,98 @@
 	-rm -f TAGS ID GTAGS GRTAGS GSYMS GPATH tags
 	-rm -f cscope.out cscope.in.out cscope.po.out cscope.files
 
-# Recover from deleted '.trs' file; this should ensure that
-# "rm -f foo.log; make foo.trs" re-run 'foo.test', and re-create
-# both 'foo.log' and 'foo.trs'.  Break the recipe in two subshells
-# to avoid problems with "make -n".
-.log.trs:
-	rm -f $< $@
-	$(MAKE) $(AM_MAKEFLAGS) $<
-
-# Leading 'am--fnord' is there to ensure the list of targets does not
-# exand to empty, as could happen e.g. with make check TESTS=''.
-am--fnord $(TEST_LOGS) $(TEST_LOGS:.log=.trs): $(am__force_recheck)
-am--force-recheck:
-	@:
-
-$(TEST_SUITE_LOG): $(TEST_LOGS)
-	@$(am__set_TESTS_bases); \
-	am__f_ok () { test -f "$$1" && test -r "$$1"; }; \
-	redo_bases=`for i in $$bases; do \
-	              am__f_ok $$i.trs && am__f_ok $$i.log || echo $$i; \
-	            done`; \
-	if test -n "$$redo_bases"; then \
-	  redo_logs=`for i in $$redo_bases; do echo $$i.log; done`; \
-	  redo_results=`for i in $$redo_bases; do echo $$i.trs; done`; \
-	  if $(am__make_dryrun); then :; else \
-	    rm -f $$redo_logs && rm -f $$redo_results || exit 1; \
-	  fi; \
-	fi; \
-	if test -n "$$am__remaking_logs"; then \
-	  echo "fatal: making $(TEST_SUITE_LOG): possible infinite" \
-	       "recursion detected" >&2; \
-	else \
-	  am__remaking_logs=yes $(MAKE) $(AM_MAKEFLAGS) $$redo_logs; \
-	fi; \
-	if $(am__make_dryrun); then :; else \
-	  st=0;  \
-	  errmsg="fatal: making $(TEST_SUITE_LOG): failed to create"; \
-	  for i in $$redo_bases; do \
-	    test -f $$i.trs && test -r $$i.trs \
-	      || { echo "$$errmsg $$i.trs" >&2; st=1; }; \
-	    test -f $$i.log && test -r $$i.log \
-	      || { echo "$$errmsg $$i.log" >&2; st=1; }; \
+check-TESTS: $(TESTS)
+	@failed=0; all=0; xfail=0; xpass=0; skip=0; \
+	srcdir=$(srcdir); export srcdir; \
+	list=' $(TESTS) '; \
+	$(am__tty_colors); \
+	if test -n "$$list"; then \
+	  for tst in $$list; do \
+	    if test -f ./$$tst; then dir=./; \
+	    elif test -f $$tst; then dir=; \
+	    else dir="$(srcdir)/"; fi; \
+	    if $(TESTS_ENVIRONMENT) $${dir}$$tst $(AM_TESTS_FD_REDIRECT); then \
+	      all=`expr $$all + 1`; \
+	      case " $(XFAIL_TESTS) " in \
+	      *[\ \	]$$tst[\ \	]*) \
+		xpass=`expr $$xpass + 1`; \
+		failed=`expr $$failed + 1`; \
+		col=$$red; res=XPASS; \
+	      ;; \
+	      *) \
+		col=$$grn; res=PASS; \
+	      ;; \
+	      esac; \
+	    elif test $$? -ne 77; then \
+	      all=`expr $$all + 1`; \
+	      case " $(XFAIL_TESTS) " in \
+	      *[\ \	]$$tst[\ \	]*) \
+		xfail=`expr $$xfail + 1`; \
+		col=$$lgn; res=XFAIL; \
+	      ;; \
+	      *) \
+		failed=`expr $$failed + 1`; \
+		col=$$red; res=FAIL; \
+	      ;; \
+	      esac; \
+	    else \
+	      skip=`expr $$skip + 1`; \
+	      col=$$blu; res=SKIP; \
+	    fi; \
+	    echo "$${col}$$res$${std}: $$tst"; \
 	  done; \
-	  test $$st -eq 0 || exit 1; \
-	fi
-	@$(am__sh_e_setup); $(am__tty_colors); $(am__set_TESTS_bases); \
-	ws='[ 	]'; \
-	results=`for b in $$bases; do echo $$b.trs; done`; \
-	test -n "$$results" || results=/dev/null; \
-	all=`  grep "^$$ws*:test-result:"           $$results | wc -l`; \
-	pass=` grep "^$$ws*:test-result:$$ws*PASS"  $$results | wc -l`; \
-	fail=` grep "^$$ws*:test-result:$$ws*FAIL"  $$results | wc -l`; \
-	skip=` grep "^$$ws*:test-result:$$ws*SKIP"  $$results | wc -l`; \
-	xfail=`grep "^$$ws*:test-result:$$ws*XFAIL" $$results | wc -l`; \
-	xpass=`grep "^$$ws*:test-result:$$ws*XPASS" $$results | wc -l`; \
-	error=`grep "^$$ws*:test-result:$$ws*ERROR" $$results | wc -l`; \
-	if test `expr $$fail + $$xpass + $$error` -eq 0; then \
-	  success=true; \
-	else \
-	  success=false; \
-	fi; \
-	br='==================='; br=$$br$$br$$br$$br; \
-	result_count () \
-	{ \
-	    if test x"$$1" = x"--maybe-color"; then \
-	      maybe_colorize=yes; \
-	    elif test x"$$1" = x"--no-color"; then \
-	      maybe_colorize=no; \
+	  if test "$$all" -eq 1; then \
+	    tests="test"; \
+	    All=""; \
+	  else \
+	    tests="tests"; \
+	    All="All "; \
+	  fi; \
+	  if test "$$failed" -eq 0; then \
+	    if test "$$xfail" -eq 0; then \
+	      banner="$$All$$all $$tests passed"; \
 	    else \
-	      echo "$@: invalid 'result_count' usage" >&2; exit 4; \
+	      if test "$$xfail" -eq 1; then failures=failure; else failures=failures; fi; \
+	      banner="$$All$$all $$tests behaved as expected ($$xfail expected $$failures)"; \
 	    fi; \
-	    shift; \
-	    desc=$$1 count=$$2; \
-	    if test $$maybe_colorize = yes && test $$count -gt 0; then \
-	      color_start=$$3 color_end=$$std; \
+	  else \
+	    if test "$$xpass" -eq 0; then \
+	      banner="$$failed of $$all $$tests failed"; \
 	    else \
-	      color_start= color_end=; \
+	      if test "$$xpass" -eq 1; then passes=pass; else passes=passes; fi; \
+	      banner="$$failed of $$all $$tests did not behave as expected ($$xpass unexpected $$passes)"; \
 	    fi; \
-	    echo "$${color_start}# $$desc $$count$${color_end}"; \
-	}; \
-	create_testsuite_report () \
-	{ \
-	  result_count $$1 "TOTAL:" $$all   "$$brg"; \
-	  result_count $$1 "PASS: " $$pass  "$$grn"; \
-	  result_count $$1 "SKIP: " $$skip  "$$blu"; \
-	  result_count $$1 "XFAIL:" $$xfail "$$lgn"; \
-	  result_count $$1 "FAIL: " $$fail  "$$red"; \
-	  result_count $$1 "XPASS:" $$xpass "$$red"; \
-	  result_count $$1 "ERROR:" $$error "$$mgn"; \
-	}; \
-	{								\
-	  echo "$(PACKAGE_STRING): $(subdir)/$(TEST_SUITE_LOG)" |	\
-	    $(am__rst_title);						\
-	  create_testsuite_report --no-color;				\
-	  echo;								\
-	  echo ".. contents:: :depth: 2";				\
-	  echo;								\
-	  for b in $$bases; do echo $$b; done				\
-	    | $(am__create_global_log);					\
-	} >$(TEST_SUITE_LOG).tmp || exit 1;				\
-	mv $(TEST_SUITE_LOG).tmp $(TEST_SUITE_LOG);			\
-	if $$success; then						\
-	  col="$$grn";							\
-	 else								\
-	  col="$$red";							\
-	  test x"$$VERBOSE" = x || cat $(TEST_SUITE_LOG);		\
-	fi;								\
-	echo "$${col}$$br$${std}"; 					\
-	echo "$${col}Testsuite summary for $(PACKAGE_STRING)$${std}";	\
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-	if $$success; then :; else					\
-	  echo "$${col}See $(subdir)/$(TEST_SUITE_LOG)$${std}";		\
-	  if test -n "$(PACKAGE_BUGREPORT)"; then			\
-	    echo "$${col}Please report to $(PACKAGE_BUGREPORT)$${std}";	\
-	  fi;								\
-	  echo "$$col$$br$$std";					\
-	fi;								\
-	$$success || exit 1
-
-check-TESTS:
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-	@test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
-	@set +e; $(am__set_TESTS_bases); \
-	log_list=`for i in $$bases; do echo $$i.log; done`; \
-	trs_list=`for i in $$bases; do echo $$i.trs; done`; \
-	log_list=`echo $$log_list`; trs_list=`echo $$trs_list`; \
-	$(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) TEST_LOGS="$$log_list"; \
-	exit $$?;
-recheck: all $(check_PROGRAMS)
-	@test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
-	@set +e; $(am__set_TESTS_bases); \
-	bases=`for i in $$bases; do echo $$i; done \
-	         | $(am__list_recheck_tests)` || exit 1; \
-	log_list=`for i in $$bases; do echo $$i.log; done`; \
-	log_list=`echo $$log_list`; \
-	$(MAKE) $(AM_MAKEFLAGS) $(TEST_SUITE_LOG) \
-	        am__force_recheck=am--force-recheck \
-	        TEST_LOGS="$$log_list"; \
-	exit $$?
-test-pngtest.sh.log: test-pngtest.sh
-	@p='test-pngtest.sh'; \
-	b='test-pngtest.sh'; \
-	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
-	--log-file $$b.log --trs-file $$b.trs \
-	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
-	"$$tst" $(AM_TESTS_FD_REDIRECT)
-test-pngvalid-simple.sh.log: test-pngvalid-simple.sh
-	@p='test-pngvalid-simple.sh'; \
-	b='test-pngvalid-simple.sh'; \
-	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
-	--log-file $$b.log --trs-file $$b.trs \
-	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
-	"$$tst" $(AM_TESTS_FD_REDIRECT)
-test-pngvalid-full.sh.log: test-pngvalid-full.sh
-	@p='test-pngvalid-full.sh'; \
-	b='test-pngvalid-full.sh'; \
-	$(am__check_pre) $(LOG_DRIVER) --test-name "$$f" \
-	--log-file $$b.log --trs-file $$b.trs \
-	$(am__common_driver_flags) $(AM_LOG_DRIVER_FLAGS) $(LOG_DRIVER_FLAGS) -- $(LOG_COMPILE) \
-	"$$tst" $(AM_TESTS_FD_REDIRECT)
-.test.log:
-	@p='$<'; \
-	$(am__set_b); \
-	$(am__check_pre) $(TEST_LOG_DRIVER) --test-name "$$f" \
-	--log-file $$b.log --trs-file $$b.trs \
-	$(am__common_driver_flags) $(AM_TEST_LOG_DRIVER_FLAGS) $(TEST_LOG_DRIVER_FLAGS) -- $(TEST_LOG_COMPILE) \
-	"$$tst" $(AM_TESTS_FD_REDIRECT)
-@am__EXEEXT_TRUE@.test$(EXEEXT).log:
-@am__EXEEXT_TRUE@	@p='$<'; \
-@am__EXEEXT_TRUE@	$(am__set_b); \
-@am__EXEEXT_TRUE@	$(am__check_pre) $(TEST_LOG_DRIVER) --test-name "$$f" \
-@am__EXEEXT_TRUE@	--log-file $$b.log --trs-file $$b.trs \
-@am__EXEEXT_TRUE@	$(am__common_driver_flags) $(AM_TEST_LOG_DRIVER_FLAGS) $(TEST_LOG_DRIVER_FLAGS) -- $(TEST_LOG_COMPILE) \
-@am__EXEEXT_TRUE@	"$$tst" $(AM_TESTS_FD_REDIRECT)
+	  fi; \
+	  dashes="$$banner"; \
+	  skipped=""; \
+	  if test "$$skip" -ne 0; then \
+	    if test "$$skip" -eq 1; then \
+	      skipped="($$skip test was not run)"; \
+	    else \
+	      skipped="($$skip tests were not run)"; \
+	    fi; \
+	    test `echo "$$skipped" | wc -c` -le `echo "$$banner" | wc -c` || \
+	      dashes="$$skipped"; \
+	  fi; \
+	  report=""; \
+	  if test "$$failed" -ne 0 && test -n "$(PACKAGE_BUGREPORT)"; then \
+	    report="Please report to $(PACKAGE_BUGREPORT)"; \
+	    test `echo "$$report" | wc -c` -le `echo "$$banner" | wc -c` || \
+	      dashes="$$report"; \
+	  fi; \
+	  dashes=`echo "$$dashes" | sed s/./=/g`; \
+	  if test "$$failed" -eq 0; then \
+	    col="$$grn"; \
+	  else \
+	    col="$$red"; \
+	  fi; \
+	  echo "$${col}$$dashes$${std}"; \
+	  echo "$${col}$$banner$${std}"; \
+	  test -z "$$skipped" || echo "$${col}$$skipped$${std}"; \
+	  test -z "$$report" || echo "$${col}$$report$${std}"; \
+	  echo "$${col}$$dashes$${std}"; \
+	  test "$$failed" -eq 0; \
+	else :; fi
 
 distdir: $(DISTFILES)
 	$(am__remove_distdir)
@@ -1581,9 +1343,6 @@
 	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
 	fi
 mostlyclean-generic:
-	-test -z "$(TEST_LOGS)" || rm -f $(TEST_LOGS)
-	-test -z "$(TEST_LOGS:.log=.trs)" || rm -f $(TEST_LOGS:.log=.trs)
-	-test -z "$(TEST_SUITE_LOG)" || rm -f $(TEST_SUITE_LOG)
 
 clean-generic:
 	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
@@ -1699,8 +1458,8 @@
 	install-ps-am install-strip installcheck installcheck-am \
 	installdirs maintainer-clean maintainer-clean-generic \
 	mostlyclean mostlyclean-compile mostlyclean-generic \
-	mostlyclean-libtool pdf pdf-am ps ps-am recheck tags tags-am \
-	uninstall uninstall-am uninstall-binSCRIPTS uninstall-hook \
+	mostlyclean-libtool pdf pdf-am ps ps-am tags tags-am uninstall \
+	uninstall-am uninstall-binSCRIPTS uninstall-hook \
 	uninstall-libLTLIBRARIES uninstall-man uninstall-man3 \
 	uninstall-man5 uninstall-nodist_pkgincludeHEADERS \
 	uninstall-pkgconfigDATA uninstall-pkgincludeHEADERS
diff --git a/README b/README
index fb38339..c124057 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.5.15beta03 - February 5, 2013 (shared library 15.0)
+README for libpng version 1.5.15beta03 - February 7, 2013 (shared library 15.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
diff --git a/configure b/configure
index 7443054..5759a3a 100755
--- a/configure
+++ b/configure
@@ -709,6 +709,10 @@
 MAINT
 MAINTAINER_MODE_FALSE
 MAINTAINER_MODE_TRUE
+AM_BACKSLASH
+AM_DEFAULT_VERBOSITY
+AM_DEFAULT_V
+AM_V
 am__untar
 am__tar
 AMTAR
@@ -773,6 +777,7 @@
 ac_subst_files=''
 ac_user_opts='
 enable_option_checking
+enable_silent_rules
 enable_maintainer_mode
 enable_dependency_tracking
 with_gnu_ld
@@ -1416,10 +1421,15 @@
   --disable-option-checking  ignore unrecognized --enable/--with options
   --disable-FEATURE       do not include FEATURE (same as --enable-FEATURE=no)
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
-  --enable-maintainer-mode  enable make rules and dependencies not useful
-			  (and sometimes confusing) to the casual installer
-  --disable-dependency-tracking  speeds up one-time build
-  --enable-dependency-tracking   do not reject slow dependency extractors
+  --enable-silent-rules   less verbose build output (undo: "make V=1")
+  --disable-silent-rules  verbose build output (undo: "make V=0")
+  --enable-maintainer-mode
+                          enable make rules and dependencies not useful (and
+                          sometimes confusing) to the casual installer
+  --enable-dependency-tracking
+                          do not reject slow dependency extractors
+  --disable-dependency-tracking
+                          speeds up one-time build
   --enable-shared[=PKGS]  build shared libraries [default=yes]
   --enable-static[=PKGS]  build static libraries [default=yes]
   --enable-fast-install[=PKGS]
@@ -2290,7 +2300,7 @@
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
-am__api_version='1.11'
+am__api_version='1.13'
 
 ac_aux_dir=
 for ac_dir in "$srcdir" "$srcdir/.." "$srcdir/../.."; do
@@ -2416,9 +2426,6 @@
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether build environment is sane" >&5
 $as_echo_n "checking whether build environment is sane... " >&6; }
-# Just in case
-sleep 1
-echo timestamp > conftest.file
 # Reject unsafe characters in $srcdir or the absolute working directory
 # name.  Accept space and tab only in the latter.
 am_lf='
@@ -2429,32 +2436,40 @@
 esac
 case $srcdir in
   *[\\\"\#\$\&\'\`$am_lf\ \	]*)
-    as_fn_error $? "unsafe srcdir value: \`$srcdir'" "$LINENO" 5;;
+    as_fn_error $? "unsafe srcdir value: '$srcdir'" "$LINENO" 5;;
 esac
 
-# Do `set' in a subshell so we don't clobber the current shell's
+# Do 'set' in a subshell so we don't clobber the current shell's
 # arguments.  Must try -L first in case configure is actually a
 # symlink; some systems play weird games with the mod time of symlinks
 # (eg FreeBSD returns the mod time of the symlink's containing
 # directory).
 if (
-   set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
-   if test "$*" = "X"; then
-      # -L didn't work.
-      set X `ls -t "$srcdir/configure" conftest.file`
-   fi
-   rm -f conftest.file
-   if test "$*" != "X $srcdir/configure conftest.file" \
-      && test "$*" != "X conftest.file $srcdir/configure"; then
+   am_has_slept=no
+   for am_try in 1 2; do
+     echo "timestamp, slept: $am_has_slept" > conftest.file
+     set X `ls -Lt "$srcdir/configure" conftest.file 2> /dev/null`
+     if test "$*" = "X"; then
+	# -L didn't work.
+	set X `ls -t "$srcdir/configure" conftest.file`
+     fi
+     if test "$*" != "X $srcdir/configure conftest.file" \
+	&& test "$*" != "X conftest.file $srcdir/configure"; then
 
-      # If neither matched, then we have a broken ls.  This can happen
-      # if, for instance, CONFIG_SHELL is bash and it inherits a
-      # broken ls alias from the environment.  This has actually
-      # happened.  Such a system could not be considered "sane".
-      as_fn_error $? "ls -t appears to fail.  Make sure there is not a broken
-alias in your environment" "$LINENO" 5
-   fi
-
+	# If neither matched, then we have a broken ls.  This can happen
+	# if, for instance, CONFIG_SHELL is bash and it inherits a
+	# broken ls alias from the environment.  This has actually
+	# happened.  Such a system could not be considered "sane".
+	as_fn_error $? "ls -t appears to fail.  Make sure there is not a broken
+  alias in your environment" "$LINENO" 5
+     fi
+     if test "$2" = conftest.file || test $am_try -eq 2; then
+       break
+     fi
+     # Just in case.
+     sleep 1
+     am_has_slept=yes
+   done
    test "$2" = conftest.file
    )
 then
@@ -2466,6 +2481,16 @@
 fi
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
 $as_echo "yes" >&6; }
+# If we didn't sleep, we still need to ensure time stamps of config.status and
+# generated files are strictly newer.
+am_sleep_pid=
+if grep 'slept: no' conftest.file >/dev/null 2>&1; then
+  ( sleep 1 ) &
+  am_sleep_pid=$!
+fi
+
+rm -f conftest.file
+
 test "$program_prefix" != NONE &&
   program_transform_name="s&^&$program_prefix&;$program_transform_name"
 # Use a double $ so make ignores it.
@@ -2488,12 +2513,12 @@
   esac
 fi
 # Use eval to expand $SHELL
-if eval "$MISSING --run true"; then
-  am_missing_run="$MISSING --run "
+if eval "$MISSING --is-lightweight"; then
+  am_missing_run="$MISSING "
 else
   am_missing_run=
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: \`missing' script is too old or missing" >&5
-$as_echo "$as_me: WARNING: \`missing' script is too old or missing" >&2;}
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: 'missing' script is too old or missing" >&5
+$as_echo "$as_me: WARNING: 'missing' script is too old or missing" >&2;}
 fi
 
 if test x"${install_sh}" != xset; then
@@ -2505,10 +2530,10 @@
   esac
 fi
 
-# Installed binaries are usually stripped using `strip' when the user
-# run `make install-strip'.  However `strip' might not be the right
+# Installed binaries are usually stripped using 'strip' when the user
+# run "make install-strip".  However 'strip' might not be the right
 # tool to use in cross-compilation environments, therefore Automake
-# will honor the `STRIP' environment variable to overrule this program.
+# will honor the 'STRIP' environment variable to overrule this program.
 if test "$cross_compiling" != no; then
   if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}strip", so it can be a program name with args.
@@ -2647,12 +2672,6 @@
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $MKDIR_P" >&5
 $as_echo "$MKDIR_P" >&6; }
 
-mkdir_p="$MKDIR_P"
-case $mkdir_p in
-  [\\/$]* | ?:[\\/]*) ;;
-  */*) mkdir_p="\$(top_builddir)/$mkdir_p" ;;
-esac
-
 for ac_prog in gawk mawk nawk awk
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
@@ -2735,6 +2754,45 @@
 fi
 rmdir .tst 2>/dev/null
 
+# Check whether --enable-silent-rules was given.
+if test "${enable_silent_rules+set}" = set; then :
+  enableval=$enable_silent_rules;
+fi
+
+case $enable_silent_rules in # (((
+  yes) AM_DEFAULT_VERBOSITY=0;;
+   no) AM_DEFAULT_VERBOSITY=1;;
+    *) AM_DEFAULT_VERBOSITY=1;;
+esac
+am_make=${MAKE-make}
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $am_make supports nested variables" >&5
+$as_echo_n "checking whether $am_make supports nested variables... " >&6; }
+if ${am_cv_make_support_nested_variables+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if $as_echo 'TRUE=$(BAR$(V))
+BAR0=false
+BAR1=true
+V=1
+am__doit:
+	@$(TRUE)
+.PHONY: am__doit' | $am_make -f - >/dev/null 2>&1; then
+  am_cv_make_support_nested_variables=yes
+else
+  am_cv_make_support_nested_variables=no
+fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $am_cv_make_support_nested_variables" >&5
+$as_echo "$am_cv_make_support_nested_variables" >&6; }
+if test $am_cv_make_support_nested_variables = yes; then
+    AM_V='$(V)'
+  AM_DEFAULT_V='$(AM_DEFAULT_VERBOSITY)'
+else
+  AM_V=$AM_DEFAULT_VERBOSITY
+  AM_DEFAULT_V=$AM_DEFAULT_VERBOSITY
+fi
+AM_BACKSLASH='\'
+
 if test "`cd $srcdir && pwd`" != "`pwd`"; then
   # Use -I$(srcdir) only when $(srcdir) != ., so that make's output
   # is not polluted with repeated "-I."
@@ -2785,6 +2843,12 @@
 
 MAKEINFO=${MAKEINFO-"${am_missing_run}makeinfo"}
 
+# For better backward compatibility.  To be removed once Automake 1.9.x
+# dies out for good.  For more background, see:
+# <http://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
+# <http://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
+mkdir_p='$(MKDIR_P)'
+
 # We need awk for the "check" target.  The system "awk" is bad on
 # some platforms.
 # Always define AMTAR for backward compatibility.  Yes, it's still used
@@ -3645,7 +3709,7 @@
 _am_result=none
 # First try GNU make style include.
 echo "include confinc" > confmf
-# Ignore all kinds of additional output from `make'.
+# Ignore all kinds of additional output from 'make'.
 case `$am_make -s -f confmf 2> /dev/null` in #(
 *the\ am__doit\ target*)
   am__include=include
@@ -3701,8 +3765,8 @@
   # We make a subdir and do the tests there.  Otherwise we can end up
   # making bogus files that we don't know about and never remove.  For
   # instance it was reported that on HP-UX the gcc test will end up
-  # making a dummy file named `D' -- because `-MD' means `put the output
-  # in D'.
+  # making a dummy file named 'D' -- because '-MD' means "put the output
+  # in D".
   rm -rf conftest.dir
   mkdir conftest.dir
   # Copy depcomp to subdir because otherwise we won't find it if we're
@@ -3737,16 +3801,16 @@
     : > sub/conftest.c
     for i in 1 2 3 4 5 6; do
       echo '#include "conftst'$i'.h"' >> sub/conftest.c
-      # Using `: > sub/conftst$i.h' creates only sub/conftst1.h with
-      # Solaris 8's {/usr,}/bin/sh.
-      touch sub/conftst$i.h
+      # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with
+      # Solaris 10 /bin/sh.
+      echo '/* dummy */' > sub/conftst$i.h
     done
     echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
 
-    # We check with `-c' and `-o' for the sake of the "dashmstdout"
+    # We check with '-c' and '-o' for the sake of the "dashmstdout"
     # mode.  It turns out that the SunPro C++ compiler does not properly
-    # handle `-M -o', and we need to detect this.  Also, some Intel
-    # versions had trouble with output in subdirs
+    # handle '-M -o', and we need to detect this.  Also, some Intel
+    # versions had trouble with output in subdirs.
     am__obj=sub/conftest.${OBJEXT-o}
     am__minus_obj="-o $am__obj"
     case $depmode in
@@ -3755,8 +3819,8 @@
       test "$am__universal" = false || continue
       ;;
     nosideeffect)
-      # after this tag, mechanisms are not by side-effect, so they'll
-      # only be used when explicitly requested
+      # After this tag, mechanisms are not by side-effect, so they'll
+      # only be used when explicitly requested.
       if test "x$enable_dependency_tracking" = xyes; then
 	continue
       else
@@ -3764,7 +3828,7 @@
       fi
       ;;
     msvc7 | msvc7msys | msvisualcpp | msvcmsys)
-      # This compiler won't grok `-c -o', but also, the minuso test has
+      # This compiler won't grok '-c -o', but also, the minuso test has
       # not run yet.  These depmodes are late enough in the game, and
       # so weak that their functioning should not be impacted.
       am__obj=conftest.${OBJEXT-o}
@@ -3836,8 +3900,8 @@
   # We make a subdir and do the tests there.  Otherwise we can end up
   # making bogus files that we don't know about and never remove.  For
   # instance it was reported that on HP-UX the gcc test will end up
-  # making a dummy file named `D' -- because `-MD' means `put the output
-  # in D'.
+  # making a dummy file named 'D' -- because '-MD' means "put the output
+  # in D".
   rm -rf conftest.dir
   mkdir conftest.dir
   # Copy depcomp to subdir because otherwise we won't find it if we're
@@ -3870,16 +3934,16 @@
     : > sub/conftest.c
     for i in 1 2 3 4 5 6; do
       echo '#include "conftst'$i'.h"' >> sub/conftest.c
-      # Using `: > sub/conftst$i.h' creates only sub/conftst1.h with
-      # Solaris 8's {/usr,}/bin/sh.
-      touch sub/conftst$i.h
+      # Using ": > sub/conftst$i.h" creates only sub/conftst1.h with
+      # Solaris 10 /bin/sh.
+      echo '/* dummy */' > sub/conftst$i.h
     done
     echo "${am__include} ${am__quote}sub/conftest.Po${am__quote}" > confmf
 
-    # We check with `-c' and `-o' for the sake of the "dashmstdout"
+    # We check with '-c' and '-o' for the sake of the "dashmstdout"
     # mode.  It turns out that the SunPro C++ compiler does not properly
-    # handle `-M -o', and we need to detect this.  Also, some Intel
-    # versions had trouble with output in subdirs
+    # handle '-M -o', and we need to detect this.  Also, some Intel
+    # versions had trouble with output in subdirs.
     am__obj=sub/conftest.${OBJEXT-o}
     am__minus_obj="-o $am__obj"
     case $depmode in
@@ -3888,8 +3952,8 @@
       test "$am__universal" = false || continue
       ;;
     nosideeffect)
-      # after this tag, mechanisms are not by side-effect, so they'll
-      # only be used when explicitly requested
+      # After this tag, mechanisms are not by side-effect, so they'll
+      # only be used when explicitly requested.
       if test "x$enable_dependency_tracking" = xyes; then
 	continue
       else
@@ -3897,7 +3961,7 @@
       fi
       ;;
     msvc7 | msvc7msys | msvisualcpp | msvcmsys)
-      # This compiler won't grok `-c -o', but also, the minuso test has
+      # This compiler won't grok '-c -o', but also, the minuso test has
       # not run yet.  These depmodes are late enough in the game, and
       # so weak that their functioning should not be impacted.
       am__obj=conftest.${OBJEXT-o}
@@ -4621,101 +4685,79 @@
 ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5'
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
-if test -n "$ac_tool_prefix"; then
-  # Extract the first word of "${ac_tool_prefix}sed", so it can be a program name with args.
-set dummy ${ac_tool_prefix}sed; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_SED+:} false; then :
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a sed that does not truncate output" >&5
+$as_echo_n "checking for a sed that does not truncate output... " >&6; }
+if ${ac_cv_path_SED+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$SED"; then
-  ac_cv_prog_SED="$SED" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+            ac_script=s/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/
+     for ac_i in 1 2 3 4 5 6 7; do
+       ac_script="$ac_script$as_nl$ac_script"
+     done
+     echo "$ac_script" 2>/dev/null | sed 99q >conftest.sed
+     { ac_script=; unset ac_script;}
+     if test -z "$SED"; then
+  ac_path_SED_found=false
+  # Loop through the user's path and test for each of PROGNAME-LIST
+  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
 do
   IFS=$as_save_IFS
   test -z "$as_dir" && as_dir=.
+    for ac_prog in sed gsed; do
     for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_SED="${ac_tool_prefix}sed"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
+      ac_path_SED="$as_dir/$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_SED" || continue
+# Check for GNU ac_path_SED and select it if it is found.
+  # Check for GNU $ac_path_SED
+case `"$ac_path_SED" --version 2>&1` in
+*GNU*)
+  ac_cv_path_SED="$ac_path_SED" ac_path_SED_found=:;;
+*)
+  ac_count=0
+  $as_echo_n 0123456789 >"conftest.in"
+  while :
+  do
+    cat "conftest.in" "conftest.in" >"conftest.tmp"
+    mv "conftest.tmp" "conftest.in"
+    cp "conftest.in" "conftest.nl"
+    $as_echo '' >> "conftest.nl"
+    "$ac_path_SED" -f conftest.sed < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
+    as_fn_arith $ac_count + 1 && ac_count=$as_val
+    if test $ac_count -gt ${ac_path_SED_max-0}; then
+      # Best one so far, save it but keep looking for a better one
+      ac_cv_path_SED="$ac_path_SED"
+      ac_path_SED_max=$ac_count
+    fi
+    # 10*(2^10) chars as input seems more than enough
+    test $ac_count -gt 10 && break
   done
-IFS=$as_save_IFS
-
-fi
-fi
-SED=$ac_cv_prog_SED
-if test -n "$SED"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $SED" >&5
-$as_echo "$SED" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-
-fi
-if test -z "$ac_cv_prog_SED"; then
-  ac_ct_SED=$SED
-  # Extract the first word of "sed", so it can be a program name with args.
-set dummy sed; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_SED+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$ac_ct_SED"; then
-  ac_cv_prog_ac_ct_SED="$ac_ct_SED" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_SED="sed"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
-done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-ac_ct_SED=$ac_cv_prog_ac_ct_SED
-if test -n "$ac_ct_SED"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_SED" >&5
-$as_echo "$ac_ct_SED" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-  if test "x$ac_ct_SED" = x; then
-    SED=":"
-  else
-    case $cross_compiling:$ac_tool_warned in
-yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
-ac_tool_warned=yes ;;
+  rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
 esac
-    SED=$ac_ct_SED
+
+      $ac_path_SED_found && break 3
+    done
+  done
+  done
+IFS=$as_save_IFS
+  if test -z "$ac_cv_path_SED"; then
+    as_fn_error $? "no acceptable sed could be found in \$PATH" "$LINENO" 5
   fi
 else
-  SED="$ac_cv_prog_SED"
+  ac_cv_path_SED=$SED
 fi
 
-if test -n "$ac_tool_prefix"; then
-  # Extract the first word of "${ac_tool_prefix}awk", so it can be a program name with args.
-set dummy ${ac_tool_prefix}awk; ac_word=$2
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_SED" >&5
+$as_echo "$ac_cv_path_SED" >&6; }
+ SED="$ac_cv_path_SED"
+  rm -f conftest.sed
+
+for ac_prog in gawk mawk nawk awk
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
 if ${ac_cv_prog_AWK+:} false; then :
@@ -4731,7 +4773,7 @@
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_AWK="${ac_tool_prefix}awk"
+    ac_cv_prog_AWK="$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -4751,59 +4793,8 @@
 fi
 
 
-fi
-if test -z "$ac_cv_prog_AWK"; then
-  ac_ct_AWK=$AWK
-  # Extract the first word of "awk", so it can be a program name with args.
-set dummy awk; ac_word=$2
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
-$as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_ac_ct_AWK+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  if test -n "$ac_ct_AWK"; then
-  ac_cv_prog_ac_ct_AWK="$ac_ct_AWK" # Let the user override the test.
-else
-as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
-for as_dir in $PATH
-do
-  IFS=$as_save_IFS
-  test -z "$as_dir" && as_dir=.
-    for ac_exec_ext in '' $ac_executable_extensions; do
-  if as_fn_executable_p "$as_dir/$ac_word$ac_exec_ext"; then
-    ac_cv_prog_ac_ct_AWK="awk"
-    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
-    break 2
-  fi
+  test -n "$AWK" && break
 done
-  done
-IFS=$as_save_IFS
-
-fi
-fi
-ac_ct_AWK=$ac_cv_prog_ac_ct_AWK
-if test -n "$ac_ct_AWK"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_ct_AWK" >&5
-$as_echo "$ac_ct_AWK" >&6; }
-else
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-fi
-
-  if test "x$ac_ct_AWK" = x; then
-    AWK=":"
-  else
-    case $cross_compiling:$ac_tool_warned in
-yes:)
-{ $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: using cross tools not prefixed with host triplet" >&5
-$as_echo "$as_me: WARNING: using cross tools not prefixed with host triplet" >&2;}
-ac_tool_warned=yes ;;
-esac
-    AWK=$ac_ct_AWK
-  fi
-else
-  AWK="$ac_cv_prog_AWK"
-fi
 
 
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ln -s works" >&5
@@ -10843,14 +10834,7 @@
     *) objformat=elf ;;
     esac
   fi
-  # Handle Gentoo/FreeBSD as it was Linux
-  case $host_vendor in
-    gentoo)
-      version_type=linux ;;
-    *)
-      version_type=freebsd-$objformat ;;
-  esac
-
+  version_type=freebsd-$objformat
   case $version_type in
     freebsd-elf*)
       library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext} $libname${shared_ext}'
@@ -10861,12 +10845,6 @@
       library_names_spec='${libname}${release}${shared_ext}$versuffix $libname${shared_ext}$versuffix'
       need_version=yes
       ;;
-    linux)
-      library_names_spec='${libname}${release}${shared_ext}$versuffix ${libname}${release}${shared_ext}$major ${libname}${shared_ext}'
-      soname_spec='${libname}${release}${shared_ext}$major'
-      need_lib_prefix=no
-      need_version=no
-      ;;
   esac
   shlibpath_var=LD_LIBRARY_PATH
   case $host_os in
@@ -12051,46 +12029,6 @@
 
 
 
-# On Solaris 10 and 12 CPP gets set to cc -E, however this still
-# does some input parsing.  We need strict ANSI-C style tokenization,
-# check this:
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for a C preprocessor that does not parse its input" >&5
-$as_echo_n "checking for a C preprocessor that does not parse its input... " >&6; }
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-1.5.0 16BIT
-_ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
-  DFNCPP="$CPP"
-else
-  DFNCPP=""
-   sav_CPP="$CPP"
-   for CPP in "${CC-cc} -E" "${CC-cc} -E -traditional-cpp" "/lib/cpp" "cpp"; do
-      cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-1.5.0 16BIT
-_ACEOF
-if ac_fn_c_try_cpp "$LINENO"; then :
-  DFNCPP="$CPP"
-         break
-fi
-rm -f conftest.err conftest.i conftest.$ac_ext
-   done
-   CPP="$sav_CPP"
-fi
-rm -f conftest.err conftest.i conftest.$ac_ext
-if test -n "$DFNCPP"; then
-   { $as_echo "$as_me:${as_lineno-$LINENO}: result: $DFNCPP" >&5
-$as_echo "$DFNCPP" >&6; }
-
-else
-   { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
-as_fn_error 1 "not found
-See \`config.log' for more details" "$LINENO" 5; }
-fi
-
 # Checks for header files.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for ANSI C header files" >&5
 $as_echo_n "checking for ANSI C header files... " >&6; }
@@ -12393,6 +12331,11 @@
  esac
 
 
+# This is a remnant of the old cc -E validation, where it may have been
+# necessary to use a different preprocessor for .dfn files
+DFNCPP="$CPP"
+
+
 # Checks for library functions.
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for working strtod" >&5
 $as_echo_n "checking for working strtod... " >&6; }
@@ -13002,6 +12945,14 @@
 LTLIBOBJS=$ac_ltlibobjs
 
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking that generated files are newer than configure" >&5
+$as_echo_n "checking that generated files are newer than configure... " >&6; }
+   if test -n "$am_sleep_pid"; then
+     # Hide warnings about reused PIDs.
+     wait $am_sleep_pid 2>/dev/null
+   fi
+   { $as_echo "$as_me:${as_lineno-$LINENO}: result: done" >&5
+$as_echo "done" >&6; }
  if test -n "$EXEEXT"; then
   am__EXEEXT_TRUE=
   am__EXEEXT_FALSE='#'
@@ -14511,7 +14462,7 @@
 
   case $ac_file$ac_mode in
     "depfiles":C) test x"$AMDEP_TRUE" != x"" || {
-  # Autoconf 2.62 quotes --file arguments for eval, but not when files
+  # Older Autoconf quotes --file arguments for eval, but not when files
   # are listed without --file.  Let's play safe and only enable the eval
   # if we detect the quoting.
   case $CONFIG_FILES in
@@ -14524,7 +14475,7 @@
     # Strip MF so we end up with the name of the file.
     mf=`echo "$mf" | sed -e 's/:.*$//'`
     # Check whether this is an Automake generated Makefile or not.
-    # We used to match only the files named `Makefile.in', but
+    # We used to match only the files named 'Makefile.in', but
     # some people rename them; so instead we look at the file content.
     # Grep'ing the first line is not enough: some people post-process
     # each Makefile.in and add a new line on top of each file to say so.
@@ -14558,21 +14509,19 @@
       continue
     fi
     # Extract the definition of DEPDIR, am__include, and am__quote
-    # from the Makefile without running `make'.
+    # from the Makefile without running 'make'.
     DEPDIR=`sed -n 's/^DEPDIR = //p' < "$mf"`
     test -z "$DEPDIR" && continue
     am__include=`sed -n 's/^am__include = //p' < "$mf"`
     test -z "am__include" && continue
     am__quote=`sed -n 's/^am__quote = //p' < "$mf"`
-    # When using ansi2knr, U may be empty or an underscore; expand it
-    U=`sed -n 's/^U = //p' < "$mf"`
     # Find all dependency output files, they are included files with
     # $(DEPDIR) in their names.  We invoke sed twice because it is the
     # simplest approach to changing $(DEPDIR) to its actual value in the
     # expansion.
     for file in `sed -n "
       s/^$am__include $am__quote\(.*(DEPDIR).*\)$am__quote"'$/\1/p' <"$mf" | \
-	 sed -e 's/\$(DEPDIR)/'"$DEPDIR"'/g' -e 's/\$U/'"$U"'/g'`; do
+	 sed -e 's/\$(DEPDIR)/'"$DEPDIR"'/g'`; do
       # Make sure the directory exists.
       test -f "$dirpart/$file" && continue
       fdir=`$as_dirname -- "$file" ||
diff --git a/libpng-manual.txt b/libpng-manual.txt
index 339bdbf..5b67dc9 100644
--- a/libpng-manual.txt
+++ b/libpng-manual.txt
@@ -1,6 +1,6 @@
 Libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.15beta03 - February 5, 2013
+ libpng version 1.5.15beta03 - February 7, 2013
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2012 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.15beta03 - February 5, 2013
+ libpng versions 0.97, January 1998, through 1.5.15beta03 - February 7, 2013
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2012 Glenn Randers-Pehrson
 
@@ -4617,7 +4617,7 @@
 
 XIV. Y2K Compliance in libpng
 
-February 5, 2013
+February 7, 2013
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
diff --git a/libpng.3 b/libpng.3
index 017c658..3516d58 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,4 +1,4 @@
-.TH LIBPNG 3 "February 5, 2013"
+.TH LIBPNG 3 "February 7, 2013"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.5.15beta03
 .SH SYNOPSIS
@@ -492,7 +492,7 @@
 .SH LIBPNG.TXT
 Libpng-manual.txt - A description on how to use and modify libpng
 
- libpng version 1.5.15beta03 - February 5, 2013
+ libpng version 1.5.15beta03 - February 7, 2013
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2012 Glenn Randers-Pehrson
@@ -503,7 +503,7 @@
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.5.15beta03 - February 5, 2013
+ libpng versions 0.97, January 1998, through 1.5.15beta03 - February 7, 2013
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2012 Glenn Randers-Pehrson
 
@@ -5110,7 +5110,7 @@
 
 .SH XIV. Y2K Compliance in libpng
 
-February 5, 2013
+February 7, 2013
 
 Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
@@ -5396,7 +5396,7 @@
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.5.15beta03 - February 5, 2013:
+Libpng version 1.5.15beta03 - February 7, 2013:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -5419,7 +5419,7 @@
 
 This code is released under the libpng license.
 
-libpng versions 1.2.6, August 15, 2004, through 1.5.15beta03, February 5, 2013, are
+libpng versions 1.2.6, August 15, 2004, through 1.5.15beta03, February 7, 2013, are
 Copyright (c) 2004,2006-2007 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
@@ -5518,7 +5518,7 @@
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-February 5, 2013
+February 7, 2013
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index 28c0a82..43c7b73 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,4 +1,4 @@
-.TH LIBPNGPF 3 "February 5, 2013"
+.TH LIBPNGPF 3 "February 7, 2013"
 .SH NAME
 libpng \- Portable Network Graphics (PNG) Reference Library 1.5.15beta03
 (private functions)
diff --git a/png.5 b/png.5
index b571ef7..f935579 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "February 5, 2013"
+.TH PNG 5 "February 7, 2013"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
diff --git a/png.c b/png.c
index c4b1daa..03ef63a 100644
--- a/png.c
+++ b/png.c
@@ -658,13 +658,13 @@
 #else
 #  ifdef __STDC__
    return PNG_STRING_NEWLINE \
-     "libpng version 1.5.15beta03 - February 5, 2013" PNG_STRING_NEWLINE \
+     "libpng version 1.5.15beta03 - February 7, 2013" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2013 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 "libpng version 1.5.15beta03 - February 5, 2013\
+      return "libpng version 1.5.15beta03 - February 7, 2013\
       Copyright (c) 1998-2013 Glenn Randers-Pehrson\
       Copyright (c) 1996-1997 Andreas Dilger\
       Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.";
diff --git a/png.h b/png.h
index 64b9ed6..9c8ced3 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.5.15beta03 - February 5, 2013
+ * libpng version 1.5.15beta03 - February 7, 2013
  * Copyright (c) 1998-2013 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.)
@@ -11,7 +11,7 @@
  * Authors and maintainers:
  *   libpng versions 0.71, May 1995, through 0.88, January 1996: Guy Schalnat
  *   libpng versions 0.89c, June 1996, through 0.96, May 1997: Andreas Dilger
- *   libpng versions 0.97, January 1998, through 1.5.15beta03 - February 5, 2013: Glenn
+ *   libpng versions 0.97, January 1998, through 1.5.15beta03 - February 7, 2013: Glenn
  *   See also "Contributing Authors", below.
  *
  * Note about libpng version numbers:
@@ -216,7 +216,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.2.6, August 15, 2004, through 1.5.15beta03, February 5, 2013, are
+ * libpng versions 1.2.6, August 15, 2004, through 1.5.15beta03, February 7, 2013, are
  * Copyright (c) 2004, 2006-2013 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:
@@ -328,7 +328,7 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    February 5, 2013
+ *    February 7, 2013
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
@@ -395,7 +395,7 @@
 /* Version information for png.h - this should match the version in png.c */
 #define PNG_LIBPNG_VER_STRING "1.5.15beta03"
 #define PNG_HEADER_VERSION_STRING \
-     " libpng version 1.5.15beta03 - February 5, 2013\n"
+     " libpng version 1.5.15beta03 - February 7, 2013\n"
 
 #define PNG_LIBPNG_VER_SONUM   15
 #define PNG_LIBPNG_VER_DLLNUM  15
diff --git a/pngconf.h b/pngconf.h
index 9945bdd..3c7d9cd 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.5.15beta03 - February 5, 2013
+ * libpng version 1.5.15beta03 - February 7, 2013
  *
  * Copyright (c) 1998-2013 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/projects/vstudio/readme.txt b/projects/vstudio/readme.txt
index 6ed37dc..81a8e67 100644
--- a/projects/vstudio/readme.txt
+++ b/projects/vstudio/readme.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.5.15beta03 - February 5, 2013
+libpng version 1.5.15beta03 - February 7, 2013
 
 Copyright (c) 1998-2010 Glenn Randers-Pehrson
 
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index 940491a..0a140d4 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source
  *
- * libpng version 1.5.15beta03 - February 5, 2013
+ * libpng version 1.5.15beta03 - February 7, 2013
  *
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  *
diff --git a/scripts/README.txt b/scripts/README.txt
index aeb91a8..a2c8ab5 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,5 +1,5 @@
 
-Makefiles for  libpng version 1.5.15beta03 - February 5, 2013
+Makefiles for  libpng version 1.5.15beta03 - February 7, 2013
 
 pnglibconf.h.prebuilt       =>  Stores configuration settings
  makefile.linux    =>  Linux/ELF makefile
diff --git a/scripts/options.awk b/scripts/options.awk
index 41b6ddd..4b8a419 100755
--- a/scripts/options.awk
+++ b/scripts/options.awk
@@ -30,7 +30,7 @@
 # are copied to the preprocessed file).
 
 BEGIN{
-   out="/dev/null"              # intermediate, preprocessed, file
+   out=""                       # intermediate, preprocessed, file
    pre=-1                       # preprocess (first line)
    version="libpng version unknown" # version information
    version_file=""              # where to find the version
@@ -79,7 +79,7 @@
 }
 
 # The output file must be specified before any input:
-out == "/dev/null" {
+out == "" {
    print "out=output.file must be given on the command line"
    err = 1
    exit 1
diff --git a/scripts/pnglibconf.h.prebuilt b/scripts/pnglibconf.h.prebuilt
index 2784246..a961188 100644
--- a/scripts/pnglibconf.h.prebuilt
+++ b/scripts/pnglibconf.h.prebuilt
@@ -3,7 +3,7 @@
 
 /* pnglibconf.h - library build configuration */
 
-/* Libpng 1.5.15beta03 - February 5, 2013 */
+/* Libpng 1.5.15beta03 - February 7, 2013 */
 
 /* Copyright (c) 1998-2012 Glenn Randers-Pehrson */
 
diff --git a/test-driver b/test-driver
old mode 100644
new mode 100755