[libpng14] Imported from libpng-1.4.20rc01.tarv1.4.20rc01

31 files changed, 85 insertions, 85 deletions

diff --git a/ANNOUNCE b/ANNOUNCE
index 5cb15a02c..f0edeefbb 100644
--- a/ANNOUNCE
+++ b/ANNOUNCE
@@ -1,5 +1,5 @@
 
-Libpng 1.4.20beta01 - December 27, 2016
+Libpng 1.4.20rc01 - December 27, 2016
 
 This is not intended to be a public release.  It will be replaced
 within a few weeks by a public version or by another test version.
@@ -9,24 +9,24 @@ Files available for download:
 Source files with LF line endings (for Unix/Linux) and with a
 "configure" script
 
-   1.4.20beta01.tar.xz (LZMA-compressed, recommended)
-   1.4.20beta01.tar.gz
+   1.4.20rc01.tar.xz (LZMA-compressed, recommended)
+   1.4.20rc01.tar.gz
 
 Source files with CRLF line endings (for Windows), without the
 "configure" script
 
-   lp1420b01.7z (LZMA-compressed, recommended)
-   lp1420b01.zip
+   lp1420r01.7z (LZMA-compressed, recommended)
+   lp1420r01.zip
 
 Other information:
 
-   1.4.20beta01-README.txt
-   1.4.20beta01-LICENSE.txt
-   libpng-1.4.20beta01-*.asc (armored detached GPG signatures)
+   1.4.20rc01-README.txt
+   1.4.20rc01-LICENSE.txt
+   libpng-1.4.20rc01-*.asc (armored detached GPG signatures)
 
 Changes since the last public release (1.4.19):
 
-version 1.4.20beta01 [December 27, 2016]
+version 1.4.20rc01 [December 27, 2016]
   Fix typos in libpng.3 synopses (Eric S. Raymond).
   Fixed undefined behavior in png_push_save_buffer(). Do not call
     memcpy() with a null source, even if count is zero (Leon Scroggins III).
diff --git a/CHANGES b/CHANGES
index 57d8cd2b7..94c105a9b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -3034,7 +3034,7 @@ version 1.4.19rc01 [December 14, 2015]
 version 1.4.19 [December 17, 2015]
   No changes.
 
-version 1.4.20beta01 [December 27, 2016]
+version 1.4.20rc01 [December 27, 2016]
   Fix typos in libpng.3 synopses (Eric S. Raymond).
   Fixed undefined behavior in png_push_save_buffer(). Do not call
     memcpy() with a null source, even if count is zero (Leon Scroggins III).
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1fa0ac82a..c5640db44 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -255,7 +255,7 @@ install(CODE ${PNG_CONFIG_INSTALL_CODE})
 # SET UP LINKS
 if(PNG_SHARED)
   set_target_properties(${PNG_LIB_NAME} PROPERTIES
-#   VERSION 14.${PNGLIB_RELEASE}.1.4.20beta01
+#   VERSION 14.${PNGLIB_RELEASE}.1.4.20rc01
     VERSION 14.${PNGLIB_RELEASE}.0
     SOVERSION 14
     CLEAN_DIRECT_OUTPUT 1)
diff --git a/INSTALL b/INSTALL
index 6e51fad89..d8b3fa8c6 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1,5 +1,5 @@
 
-Installing libpng version 1.4.20beta01 - March 1, 2016
+Installing libpng version 1.4.20rc01 - December 27, 2016
 
 On Unix/Linux and similar systems, you can simply type
 
@@ -46,7 +46,7 @@ to have access to the zlib.h and zconf.h include files that
 correspond to the version of zlib that's installed.
 
 You can rename the directories that you downloaded (they
-might be called "libpng-1.4.20beta01" or "libpng14" and "zlib-1.2.3"
+might be called "libpng-1.4.20rc01" or "libpng14" and "zlib-1.2.3"
 or "zlib123") so that you have directories called "zlib" and "libpng".
 
 Your directory structure should look like this:
diff --git a/LICENSE b/LICENSE
index 6090c7bae..b45950eb9 100644
--- a/LICENSE
+++ b/LICENSE
@@ -10,7 +10,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.0.7, July 1, 2000, through 1.4.20beta01, March 1, 2016, are
+libpng versions 1.0.7, July 1, 2000, through 1.4.20rc01, December 27, 2016, are
 Copyright (c) 2000-2002, 2004, 2006-2016 Glenn Randers-Pehrson, are
 derived from libpng-1.0.6, and are distributed according to the same
 disclaimer and license as libpng-1.0.6 with the following individuals
@@ -107,4 +107,4 @@ the additional disclaimers inserted at version 1.0.7.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-March 1, 2016
+December 27, 2016
diff --git a/Makefile.am b/Makefile.am
index 5d2bb4b7e..b08a647ca 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -79,7 +79,7 @@ EXTRA_DIST= \
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.4.20beta01.txt
+	example.c libpng-1.4.20rc01.txt
 
 CLEANFILES= pngout.png libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config libpng.vers \
 libpng.sym
diff --git a/Makefile.in b/Makefile.in
index 60327d820..627faece1 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -628,7 +628,7 @@ EXTRA_DIST = \
 	${srcdir}/contrib/pngsuite/* \
 	${srcdir}/contrib/visupng/* \
 	$(TESTS) \
-	example.c libpng-1.4.20beta01.txt
+	example.c libpng-1.4.20rc01.txt
 
 CLEANFILES = pngout.png libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@.pc libpng@PNGLIB_MAJOR@@PNGLIB_MINOR@-config libpng.vers \
 libpng.sym
diff --git a/README b/README
index 8122e53d8..f11b46b04 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README for libpng version 1.4.20beta01 - March 1, 2016 (shared library 14.0)
+README for libpng version 1.4.20rc01 - December 27, 2016 (shared library 14.0)
 See the note about version numbers near the top of png.h
 
 See INSTALL for instructions on how to install libpng.
@@ -187,9 +187,9 @@ Files in this distribution:
        makefile.std     =>  Generic UNIX makefile (cc, creates static
                             libpng.a)
        makefile.elf     =>  Linux/ELF makefile symbol versioning,
-                            (gcc, creates libpng14.so.14.1.4.20beta01)
+                            (gcc, creates libpng14.so.14.1.4.20rc01)
        makefile.linux   =>  Linux/ELF makefile
-                            (gcc, creates libpng14.so.14.1.4.20beta01)
+                            (gcc, creates libpng14.so.14.1.4.20rc01)
        makefile.gcc     =>  Generic makefile (gcc, creates static libpng.a)
        makefile.knr     =>  Archaic UNIX Makefile that converts files with
                             ansi2knr (Requires ansi2knr.c from
@@ -211,12 +211,12 @@ Files in this distribution:
        makefile.openbsd =>  OpenBSD makefile
        makefile.sgi     =>  Silicon Graphics IRIX (cc, creates static lib)
        makefile.sggcc   =>  Silicon Graphics
-                            (gcc, creates libpng14.so.14.1.4.20beta01)
+                            (gcc, creates libpng14.so.14.1.4.20rc01)
        makefile.sunos   =>  Sun makefile
        makefile.solaris =>  Solaris 2.X makefile
-                            (gcc, creates libpng14.so.14.1.4.20beta01)
+                            (gcc, creates libpng14.so.14.1.4.20rc01)
        makefile.so9     =>  Solaris 9 makefile
-                            (gcc, creates libpng14.so.14.1.4.20beta01)
+                            (gcc, creates libpng14.so.14.1.4.20rc01)
        makefile.32sunu  =>  Sun Ultra 32-bit makefile
        makefile.64sunu  =>  Sun Ultra 64-bit makefile
        makefile.sco     =>  For SCO OSr5  ELF and Unixware 7 with Native cc
diff --git a/configure b/configure
index 7e2946509..a0b3fdfb6 100755
--- a/configure
+++ b/configure
@@ -1,6 +1,6 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.69 for libpng 1.4.20beta01.
+# Generated by GNU Autoconf 2.69 for libpng 1.4.20rc01.
 #
 # Report bugs to <png-mng-implement@lists.sourceforge.net>.
 #
@@ -590,8 +590,8 @@ MAKEFLAGS=
 # Identity of this package.
 PACKAGE_NAME='libpng'
 PACKAGE_TARNAME='libpng'
-PACKAGE_VERSION='1.4.20beta01'
-PACKAGE_STRING='libpng 1.4.20beta01'
+PACKAGE_VERSION='1.4.20rc01'
+PACKAGE_STRING='libpng 1.4.20rc01'
 PACKAGE_BUGREPORT='png-mng-implement@lists.sourceforge.net'
 PACKAGE_URL=''
 
@@ -1333,7 +1333,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures libpng 1.4.20beta01 to adapt to many kinds of systems.
+\`configure' configures libpng 1.4.20rc01 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1403,7 +1403,7 @@ fi
 
 if test -n "$ac_init_help"; then
   case $ac_init_help in
-     short | recursive ) echo "Configuration of libpng 1.4.20beta01:";;
+     short | recursive ) echo "Configuration of libpng 1.4.20rc01:";;
    esac
   cat <<\_ACEOF
 
@@ -1520,7 +1520,7 @@ fi
 test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
-libpng configure 1.4.20beta01
+libpng configure 1.4.20rc01
 generated by GNU Autoconf 2.69
 
 Copyright (C) 2012 Free Software Foundation, Inc.
@@ -1943,7 +1943,7 @@ cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
-It was created by libpng $as_me 1.4.20beta01, which was
+It was created by libpng $as_me 1.4.20rc01, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   $ $0 $@
@@ -2806,7 +2806,7 @@ fi
 
 # Define the identity of the package.
  PACKAGE='libpng'
- VERSION='1.4.20beta01'
+ VERSION='1.4.20rc01'
 
 
 cat >>confdefs.h <<_ACEOF
@@ -2923,7 +2923,7 @@ fi
 
 
 
-PNGLIB_VERSION=1.4.20beta01
+PNGLIB_VERSION=1.4.20rc01
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=4
 PNGLIB_RELEASE=20
@@ -13615,7 +13615,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # report actual input values of CONFIG_FILES etc. instead of their
 # values after options handling.
 ac_log="
-This file was extended by libpng $as_me 1.4.20beta01, which was
+This file was extended by libpng $as_me 1.4.20rc01, which was
 generated by GNU Autoconf 2.69.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
@@ -13681,7 +13681,7 @@ _ACEOF
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config="`$as_echo "$ac_configure_args" | sed 's/^ //; s/[\\""\`\$]/\\\\&/g'`"
 ac_cs_version="\\
-libpng config.status 1.4.20beta01
+libpng config.status 1.4.20rc01
 configured by $0, generated by GNU Autoconf 2.69,
   with options \\"\$ac_cs_config\\"
 
diff --git a/configure.ac b/configure.ac
index 1dfc5850b..7493a3d08 100644
--- a/configure.ac
+++ b/configure.ac
@@ -16,14 +16,14 @@ dnl should not be necessary to regenerate configure if the time
 dnl stamps are correct
 AC_PREREQ(2.59)
 
-AC_INIT([libpng], [1.4.20beta01], [png-mng-implement@lists.sourceforge.net])
+AC_INIT([libpng], [1.4.20rc01], [png-mng-implement@lists.sourceforge.net])
 AM_INIT_AUTOMAKE
 dnl stop configure from automagically running automake
 AM_MAINTAINER_MODE
 
 dnl Version number stuff here:
 
-PNGLIB_VERSION=1.4.20beta01
+PNGLIB_VERSION=1.4.20rc01
 PNGLIB_MAJOR=1
 PNGLIB_MINOR=4
 PNGLIB_RELEASE=20
diff --git a/libpng-1.4.20beta01.txt b/libpng-1.4.20rc01.txt
index 6805aa7f1..72601a9cf 100644
--- a/libpng-1.4.20beta01.txt
+++ b/libpng-1.4.20rc01.txt
@@ -1,6 +1,6 @@
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.4.20beta01 - March 1, 2016
+ libpng version 1.4.20rc01 - December 27, 2016
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@ libpng.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.4.20beta01 - March 1, 2016
+ libpng versions 0.97, January 1998, through 1.4.20rc01 - December 27, 2016
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
 
@@ -907,7 +907,7 @@ things.
 As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
 added.  It expands the sample depth without changing tRNS to alpha.
 
-As of libpng version 1.4.20beta01, not all possible expansions are supported.
+As of libpng version 1.4.20rc01, not all possible expansions are supported.
 
 In the following table, the 01 means grayscale with depth<8, 31 means
 indexed with depth<8, other numerals represent the color type, "T" means
@@ -3298,7 +3298,7 @@ Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.4.20beta01 are Y2K compliant.  It is my belief that earlier
+upward through 1.4.20rc01 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has three year fields.  One is a 2-byte unsigned integer that
diff --git a/libpng.3 b/libpng.3
index b07893c1f..29cf139aa 100644
--- a/libpng.3
+++ b/libpng.3
@@ -1,6 +1,6 @@
-.TH LIBPNG 3 "March 1, 2016"
+.TH LIBPNG 3 "December 27, 2016"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.4.20beta01
+libpng \- Portable Network Graphics (PNG) Reference Library 1.4.20rc01
 .SH SYNOPSIS
 \fB
 #include <png.h>\fP
@@ -444,7 +444,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
 .SH LIBPNG.TXT
 libpng.txt - A description on how to use and modify libpng
 
- libpng version 1.4.20beta01 - March 1, 2016
+ libpng version 1.4.20rc01 - December 27, 2016
  Updated and distributed by Glenn Randers-Pehrson
  <glennrp at users.sourceforge.net>
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
@@ -455,7 +455,7 @@ libpng.txt - A description on how to use and modify libpng
 
  Based on:
 
- libpng versions 0.97, January 1998, through 1.4.20beta01 - March 1, 2016
+ libpng versions 0.97, January 1998, through 1.4.20rc01 - December 27, 2016
  Updated and distributed by Glenn Randers-Pehrson
  Copyright (c) 1998-2014 Glenn Randers-Pehrson
 
@@ -1351,7 +1351,7 @@ things.
 As of libpng version 1.2.9, png_set_expand_gray_1_2_4_to_8() was
 added.  It expands the sample depth without changing tRNS to alpha.
 
-As of libpng version 1.4.20beta01, not all possible expansions are supported.
+As of libpng version 1.4.20rc01, not all possible expansions are supported.
 
 In the following table, the 01 means grayscale with depth<8, 31 means
 indexed with depth<8, other numerals represent the color type, "T" means
@@ -3742,7 +3742,7 @@ Since the PNG Development group is an ad-hoc body, we can't make
 an official declaration.
 
 This is your unofficial assurance that libpng from version 0.71 and
-upward through 1.4.20beta01 are Y2K compliant.  It is my belief that earlier
+upward through 1.4.20rc01 are Y2K compliant.  It is my belief that earlier
 versions were also Y2K compliant.
 
 Libpng only has three year fields.  One is a 2-byte unsigned integer that
@@ -3895,7 +3895,7 @@ possible without all of you.
 
 Thanks to Frank J. T. Wojcik for helping with the documentation.
 
-Libpng version 1.4.20beta01 - March 1, 2016:
+Libpng version 1.4.20rc01 - December 27, 2016:
 Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
 Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
 
@@ -3920,7 +3920,7 @@ this sentence.
 
 This code is released under the libpng license.
 
-libpng versions 1.0.7, July 1, 2000, through 1.4.20beta01, March 1, 2016, are
+libpng versions 1.0.7, July 1, 2000, through 1.4.20rc01, December 27, 2016, are
 Copyright (c) 2000-2002, 2004, 2006-2016 Glenn Randers-Pehrson, are
 derived from libpng-1.0.6, and are distributed according to the same
 disclaimer and license as libpng-1.0.6 with the following individuals
@@ -4017,7 +4017,7 @@ the additional disclaimers inserted at version 1.0.7.
 
 Glenn Randers-Pehrson
 glennrp at users.sourceforge.net
-March 1, 2016
+December 27, 2016
 
 .\" end of man page
 
diff --git a/libpngpf.3 b/libpngpf.3
index e5da12a4f..03b1fec9b 100644
--- a/libpngpf.3
+++ b/libpngpf.3
@@ -1,6 +1,6 @@
-.TH LIBPNGPF 3 "March 1, 2016"
+.TH LIBPNGPF 3 "December 27, 2016"
 .SH NAME
-libpng \- Portable Network Graphics (PNG) Reference Library 1.4.20beta01
+libpng \- Portable Network Graphics (PNG) Reference Library 1.4.20rc01
 (private functions)
 .SH SYNOPSIS
 \fB#include <png.h>
diff --git a/png.5 b/png.5
index 61d6ba390..b7265dd74 100644
--- a/png.5
+++ b/png.5
@@ -1,4 +1,4 @@
-.TH PNG 5 "March 1, 2016"
+.TH PNG 5 "December 27, 2016"
 .SH NAME
 png \- Portable Network Graphics (PNG) format
 .SH DESCRIPTION
@@ -35,7 +35,7 @@ PNG 1.0 specification, October 1996:
 RFC 2083
 .IP
 .br
-ftp://ds.internic.net/rfc/rfc2083.txt
+http://www.ietf.org/rfc/rfc2083.txt
 .br
 or (as a W3C Recommendation) at
 .br
diff --git a/png.c b/png.c
index a0532dcd2..487c88759 100644
--- a/png.c
+++ b/png.c
@@ -17,7 +17,7 @@
 #include "pngpriv.h"
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_4_20beta01 Your_png_h_is_not_version_1_4_20beta01;
+typedef version_1_4_20rc01 Your_png_h_is_not_version_1_4_20rc01;
 
 /* Tells libpng that we have already handled the first "num_bytes" bytes
  * of the PNG file signature.  If the PNG data is embedded into another
@@ -558,14 +558,14 @@ png_get_copyright(png_const_structp png_ptr)
 #else
 #ifdef __STDC__
    return ((png_charp) PNG_STRING_NEWLINE \
-     "libpng version 1.4.20beta01 - December 27, 2016" PNG_STRING_NEWLINE \
+     "libpng version 1.4.20rc01 - December 27, 2016" PNG_STRING_NEWLINE \
      "Copyright (c) 1998-2002,2004,2006-2016 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 1.4.20beta01 - December 27, 2016\
+   return ((png_charp) "libpng version 1.4.20rc01 - December 27, 2016\
       Copyright (c) 1998-2002,2004,2006-2016 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 dffaa601f..8ea0c4122 100644
--- a/png.h
+++ b/png.h
@@ -1,7 +1,7 @@
 
 /* png.h - header file for PNG reference library
  *
- * libpng version 1.4.20beta01, March 1, 2016
+ * libpng version 1.4.20rc01, December 27, 2016
  *
  * Copyright (c) 1998-2002,2004,2006-2016 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -12,7 +12,7 @@
  * 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 1.4.20beta01, March 1, 2016: Glenn
+ *  libpng versions 0.97, January 1998, through 1.4.20rc01, December 27, 2016: Glenn
  *  See also "Contributing Authors", below.
  */
 
@@ -24,7 +24,7 @@
  *
  * This code is released under the libpng license.
  *
- * libpng versions 1.0.7, July 1, 2000, through 1.4.20beta01, March 1, 2016, are
+ * libpng versions 1.0.7, July 1, 2000, through 1.4.20rc01, December 27, 2016, are
  * Copyright (c) 2000-2002, 2004, 2006-2016 Glenn Randers-Pehrson, are
  * derived from libpng-1.0.6, and are distributed according to the same
  * disclaimer and license as libpng-1.0.6 with the following individuals
@@ -207,13 +207,13 @@
  * Y2K compliance in libpng:
  * =========================
  *
- *    March 1, 2016
+ *    December 27, 2016
  *
  *    Since the PNG Development group is an ad-hoc body, we can't make
  *    an official declaration.
  *
  *    This is your unofficial assurance that libpng from version 0.71 and
- *    upward through 1.4.20beta01 are Y2K compliant.  It is my belief that earlier
+ *    upward through 1.4.20rc01 are Y2K compliant.  It is my belief that earlier
  *    versions were also Y2K compliant.
  *
  *    Libpng only has three year fields.  One is a 2-byte unsigned integer
@@ -269,9 +269,9 @@
  */
 
 /* Version information for png.h - this should match the version in png.c */
-#define PNG_LIBPNG_VER_STRING "1.4.20beta01"
+#define PNG_LIBPNG_VER_STRING "1.4.20rc01"
 #define PNG_HEADER_VERSION_STRING \
-   " libpng version 1.4.20beta01 - March 1, 2016\n"
+   " libpng version 1.4.20rc01 - December 27, 2016\n"
 
 #define PNG_LIBPNG_VER_SONUM   14
 #define PNG_LIBPNG_VER_DLLNUM  14
@@ -301,7 +301,7 @@
 #define PNG_LIBPNG_BUILD_SPECIAL 32 /* Cannot be OR'ed with
                                        PNG_LIBPNG_BUILD_PRIVATE */
 
-#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_BETA
+#define PNG_LIBPNG_BUILD_BASE_TYPE PNG_LIBPNG_BUILD_RC
 
 /* Careful here.  At one time, Guy wanted to use 082, but that would be octal.
  * We must not include leading zeros.
@@ -1378,7 +1378,7 @@ struct png_struct_def
 /* This triggers a compiler error in png.c, if png.c and png.h
  * do not agree upon the version number.
  */
-typedef png_structp version_1_4_20beta01;
+typedef png_structp version_1_4_20rc01;
 
 typedef png_struct FAR * FAR * png_structpp;
 
diff --git a/pngconf.h b/pngconf.h
index beae27508..112b0dc5a 100644
--- a/pngconf.h
+++ b/pngconf.h
@@ -1,7 +1,7 @@
 
 /* pngconf.h - machine configurable file for libpng
  *
- * libpng version 1.4.20beta01, March 1, 2016
+ * libpng version 1.4.20rc01, December 27, 2016
  *
  * Copyright (c) 1998-2002,2004,2006-2015 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngerror.c b/pngerror.c
index 109f53b8b..3cdd5f4ac 100644
--- a/pngerror.c
+++ b/pngerror.c
@@ -1,7 +1,7 @@
 
 /* pngerror.c - stub functions for i/o and memory allocation
  *
- * Last changed in libpng 1.4.20 [August 7, 2016]
+ * Last changed in libpng 1.4.20 [December 27, 2016]
  * Copyright (c) 1998-2002,2004,2006-2011,2016 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.)
diff --git a/pngpriv.h b/pngpriv.h
index 72d4b3019..ec76f6be2 100644
--- a/pngpriv.h
+++ b/pngpriv.h
@@ -1,7 +1,7 @@
 
 /* pngpriv.h - private declarations for use inside libpng
  *
- * libpng version 1.4.20beta01 - March 1, 2016
+ * libpng version 1.4.20rc01 - December 27, 2016
  * For conditions of distribution and use, see copyright notice in png.h
  * Copyright (c) 1998-2002,2004,2006-2014 Glenn Randers-Pehrson
  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
diff --git a/pngtest.c b/pngtest.c
index ed3850829..df44d82dd 100644
--- a/pngtest.c
+++ b/pngtest.c
@@ -1737,4 +1737,4 @@ main(int argc, char *argv[])
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_4_20beta01 your_png_h_is_not_version_1_4_20beta01;
+typedef version_1_4_20rc01 your_png_h_is_not_version_1_4_20rc01;
diff --git a/projects/vstudio/readme.txt b/projects/vstudio/readme.txt
index 556964538..86c25fc73 100644
--- a/projects/vstudio/readme.txt
+++ b/projects/vstudio/readme.txt
@@ -1,7 +1,7 @@
 
 VisualStudio instructions
 
-libpng version 1.4.20beta01 - March 1, 2016
+libpng version 1.4.20rc01 - December 27, 2016
 
 Copyright (c) 2010 Glenn Randers-Pehrson
 
diff --git a/projects/vstudio/zlib.props b/projects/vstudio/zlib.props
index b422f22f0..07e50789f 100644
--- a/projects/vstudio/zlib.props
+++ b/projects/vstudio/zlib.props
@@ -2,7 +2,7 @@
 <!--
  * zlib.props - location of zlib source and build
  *
- * libpng version 1.4.20beta01 - March 1, 2016
+ * libpng version 1.4.20rc01 - December 27, 2016
  *
  * Copyright (c) 1998-2011 Glenn Randers-Pehrson
  *
diff --git a/scripts/README.txt b/scripts/README.txt
index 933be4024..389933a2c 100644
--- a/scripts/README.txt
+++ b/scripts/README.txt
@@ -1,8 +1,8 @@
 
-Makefiles for  libpng version 1.4.20beta01 - March 1, 2016
+Makefiles for  libpng version 1.4.20rc01 - December 27, 2016
 
  makefile.linux    =>  Linux/ELF makefile
-                       (gcc, creates libpng14.so.14.1.4.20beta01)
+                       (gcc, creates libpng14.so.14.1.4.20rc01)
  makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
  makefile.knr      =>  Archaic UNIX Makefile that converts files with
                        ansi2knr (Requires ansi2knr.c from
@@ -20,7 +20,7 @@ Makefiles for  libpng version 1.4.20beta01 - March 1, 2016
  makefile.dec      =>  DEC Alpha UNIX makefile
  makefile.dj2      =>  DJGPP 2 makefile
  makefile.elf      =>  Linux/ELF makefile symbol versioning,
-                       (gcc, creates libpng14.so.14.1.4.20beta01)
+                       (gcc, creates libpng14.so.14.1.4.20rc01)
  makefile.freebsd  =>  FreeBSD makefile
  makefile.gcc      =>  Generic gcc makefile
  makefile.hpgcc    =>  HPUX makefile using gcc
@@ -36,12 +36,12 @@ Makefiles for  libpng version 1.4.20beta01 - March 1, 2016
  makefile.os2      =>  OS/2 Makefile (gcc and emx, requires pngos2.def)
  makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
  makefile.sggcc    =>  Silicon Graphics (gcc,
-                       creates libpng14.so.14.1.4.20beta01)
+                       creates libpng14.so.14.1.4.20rc01)
  makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
  makefile.solaris  =>  Solaris 2.X makefile (gcc,
-                       creates libpng14.so.14.1.4.20beta01)
+                       creates libpng14.so.14.1.4.20rc01)
  makefile.so9      =>  Solaris 9 makefile (gcc,
-                       creates libpng14.so.14.1.4.20beta01)
+                       creates libpng14.so.14.1.4.20rc01)
  makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
  makefile.sunos    =>  Sun makefile
  makefile.32sunu   =>  Sun Ultra 32-bit makefile
diff --git a/scripts/libpng-config-head.in b/scripts/libpng-config-head.in
index 49f76b80f..46b15efa9 100755
--- a/scripts/libpng-config-head.in
+++ b/scripts/libpng-config-head.in
@@ -11,7 +11,7 @@
 
 # Modeled after libxml-config.
 
-version=1.4.20beta01
+version=1.4.20rc01
 prefix=""
 libdir=""
 libs=""
diff --git a/scripts/libpng.pc.in b/scripts/libpng.pc.in
index abf40234f..e05f91420 100644
--- a/scripts/libpng.pc.in
+++ b/scripts/libpng.pc.in
@@ -5,6 +5,6 @@ includedir=@includedir@/libpng14
 
 Name: libpng
 Description: Loads and saves PNG files
-Version: 1.4.20beta01
+Version: 1.4.20rc01
 Libs: -L${libdir} -lpng14
 Cflags: -I${includedir}
diff --git a/scripts/makefile.ne12bsd b/scripts/makefile.ne12bsd
index 8421ebc24..b5e3012ae 100644
--- a/scripts/makefile.ne12bsd
+++ b/scripts/makefile.ne12bsd
@@ -17,7 +17,7 @@ INCSDIR=${LOCALBASE}/include/libpng14
 
 LIB=	png14
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.4.20beta01
+SHLIB_MINOR=	1.4.20rc01
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
diff --git a/scripts/makefile.netbsd b/scripts/makefile.netbsd
index 077b726a6..cafb14ea4 100644
--- a/scripts/makefile.netbsd
+++ b/scripts/makefile.netbsd
@@ -17,7 +17,7 @@ INCSDIR=${LOCALBASE}/include
 
 LIB=	png
 SHLIB_MAJOR=	3
-SHLIB_MINOR=	1.4.20beta01
+SHLIB_MINOR=	1.4.20rc01
 SRCS=	png.c pngset.c pngget.c pngrutil.c pngtrans.c pngwutil.c \
 	pngread.c pngrio.c pngwio.c pngwrite.c pngrtran.c \
 	pngwtran.c pngmem.c pngerror.c pngpread.c
diff --git a/scripts/makefile.openbsd b/scripts/makefile.openbsd
index 88c1e9e9a..24e3e8503 100644
--- a/scripts/makefile.openbsd
+++ b/scripts/makefile.openbsd
@@ -11,7 +11,7 @@ LIBDIR=	${PREFIX}/lib
 MANDIR= ${PREFIX}/man/cat
 
 SHLIB_MAJOR=	0
-SHLIB_MINOR=	1.4.20beta01
+SHLIB_MINOR=	1.4.20rc01
 
 LIB=	png
 SRCS=	png.c pngerror.c pngget.c pngmem.c pngpread.c \
diff --git a/scripts/png32ce.def b/scripts/png32ce.def
index 8164628ff..d0ef5021a 100644
--- a/scripts/png32ce.def
+++ b/scripts/png32ce.def
@@ -15,7 +15,7 @@ LIBRARY lpngce
  png_get_int_32
 
 EXPORTS
-;Version 1.4.20beta01
+;Version 1.4.20rc01
   png_build_grayscale_palette  @1
 ;  png_check_sig        @2
   png_chunk_error      @3
diff --git a/scripts/pngos2.def b/scripts/pngos2.def
index d9eba08ca..ae890dd1e 100644
--- a/scripts/pngos2.def
+++ b/scripts/pngos2.def
@@ -2,7 +2,7 @@
 ; PNG.LIB module definition file for OS/2
 ;----------------------------------------
 
-; Version 1.4.20beta01
+; Version 1.4.20rc01
 
 LIBRARY		PNG
 DESCRIPTION	"PNG image compression library for OS/2"
diff --git a/scripts/pngwin.def b/scripts/pngwin.def
index 81b0140eb..03df9cbae 100644
--- a/scripts/pngwin.def
+++ b/scripts/pngwin.def
@@ -5,7 +5,7 @@
 LIBRARY
 
 EXPORTS
-;Version 1.4.20beta01
+;Version 1.4.20rc01
   png_build_grayscale_palette
   png_chunk_error
   png_chunk_warning