Check libpng directly into third_party/

third_party/libpng/scripts/README.txt

Index: third_party/libpng/scripts/README.txt
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+
+Makefiles for  libpng version 1.6.22rc01 - May 14, 2016
+
+pnglibconf.h.prebuilt       =>  Stores configuration settings
+ makefile.linux    =>  Linux/ELF makefile
+                       (gcc, creates libpng16.so.16.1.6.22rc01)
+ makefile.gcc      =>  Generic makefile (gcc, creates static libpng.a)
+ makefile.knr      =>  Archaic UNIX Makefile that converts files with
+                       ansi2knr (Requires ansi2knr.c from
+                       ftp://ftp.cs.wisc.edu/ghost)
+ makefile.acorn    =>  Acorn makefile
+ makefile.aix      =>  AIX/gcc makefile
+ makefile.amiga    =>  Amiga makefile
+ makefile.atari    =>  Atari makefile
+ makefile.bc32     =>  32-bit Borland C++ (all modules compiled in C mode)
+ makefile.beos     =>  beos makefile
+ makefile.bor      =>  Borland makefile (uses bcc)
+ makefile.cegcc    =>  minge32ce for Windows CE makefile
+ makefile.darwin   =>  Darwin makefile, can use on MacosX
+ makefile.dec      =>  DEC Alpha UNIX makefile
+ makefile.dj2      =>  DJGPP 2 makefile
+ makefile.freebsd  =>  FreeBSD makefile
+ makefile.gcc      =>  Generic gcc makefile
+ makefile.hpgcc    =>  HPUX makefile using gcc
+ makefile.hpux     =>  HPUX (10.20 and 11.00) makefile
+ makefile.hp64     =>  HPUX (10.20 and 11.00) makefile, 64-bit
+ makefile.ibmc     =>  IBM C/C++ version 3.x for Win32 and OS/2 (static)
+ makefile.intel    =>  Intel C/C++ version 4.0 and later
+ makefile.mips     =>  MIPS makefile
+ makefile.msc      =>  Microsoft C makefile
+ makefile.netbsd   =>  NetBSD/cc makefile, makes libpng.so.
+ makefile.openbsd  =>  OpenBSD makefile
+ makefile.os2      =>  OS/2 Makefile (gcc and emx, requires libpng.def)
+ makefile.sco      =>  For SCO OSr5  ELF and Unixware 7 with Native cc
+ makefile.sggcc    =>  Silicon Graphics (gcc,
+                       creates libpng16.so.16.1.6.22rc01)
+ makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
+ makefile.solaris  =>  Solaris 2.X makefile (gcc,
+                       creates libpng16.so.16.1.6.22rc01)
+ makefile.so9      =>  Solaris 9 makefile (gcc,
+                       creates libpng16.so.16.1.6.22rc01)
+ makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
+ makefile.sunos    =>  Sun makefile
+ makefile.32sunu   =>  Sun Ultra 32-bit makefile
+ makefile.64sunu   =>  Sun Ultra 64-bit makefile
+ makefile.tc3      =>  Turbo C 3.0 makefile
+ makefile.vcwin32  =>  makefile for Microsoft Visual C++ 4.0 and later
+ makevms.com       =>  VMS build script
+ smakefile.ppc     =>  AMIGA smakefile for SAS C V6.58/7.00 PPC compiler
+                       (Requires SCOPTIONS, copied from scripts/SCOPTIONS.ppc)
+
+Other supporting scripts:
+ README.txt        =>  This file
+ descrip.mms       =>  VMS makefile for MMS or MMK
+ libpng-config-body.in => used by several makefiles to create libpng-config
+ libpng-config-head.in => used by several makefiles to create libpng-config
+ libpng.pc.in      =>  Used by several makefiles to create libpng.pc
+ pngwin.rc         =>  Used by the visualc71 project.
+ pngwin.def        =>  Used by makefile.os2
+ pngwin.dfn        =>  Used to maintain pngwin.def
+ SCOPTIONS.ppc     =>  Used with smakefile.ppc
+
+ checksym.awk       =>  Used for maintaining pnglibconf.h
+ def.dfn            =>  Used for maintaining pnglibconf.h
+ options.awk        =>  Used for maintaining pnglibconf.h
+ pnglibconf.dfa     =>  Used for maintaining pnglibconf.h
+ pnglibconf.mak     =>  Used for maintaining pnglibconf.h
+ sym.dfn            =>  Used for symbol versioning
+ symbols.def        =>  Used for symbol versioning
+ symbols.dfn        =>  Used for symbol versioning
+ vers.dfn           =>  Used for symbol versioning
+
+ libtool.m4        =>  Used by autoconf tools
+ ltoptions.m4      =>  Used by autoconf tools
+ ltsugar.m4        =>  Used by autoconf tools
+ ltversion.m4      =>  Used by autoconf tools
+ lt~obsolete.m4    =>  Used by autoconf tools
+
+ intprefix.dfn     =>  Used by autoconf tools
+ macro.lst         =>  Used by autoconf tools
+ prefix.dfn        =>  Used by autoconf tools
+
+
+Further information can be found in comments in the individual makefiles.