src/png/INSTALL


Installing libpng version 1.2.20 - September 8, 2007

On Unix/Linux and similar systems, you can simply type

    ./configure [--prefix=/path]
    make check
    make install

and ignore the rest of this document.

If configure does not work on your system and you have a reasonably
up-to-date set of tools, running ./autogen.sh before running ./configure
may fix the problem.  You can also run the individual commands in
autogen.sh with the --force option, if supported by your version of
the tools.  If you run 'libtoolize --force', though, this will replace
the distributed, patched, version of ltmain.sh with an unpatched version
and your shared library builds may fail to produce libraries with the
correct version numbers.

Instead, you can use one of the custom-built makefiles in the
"scripts" directory

    cp scripts/makefile.system makefile
    make test
    make install

Or you can use one of the "projects" in the "projects" directory.

If you want to use "cmake" (see www.cmake.org), copy CMakeLists.txt
from the "scripts" directory to this directory and type

   cmake . [-DPNG_MMX=YES] -DCMAKE_INSTALL_PREFIX=/path
   make
   make install

Before installing libpng, you must first install zlib, if it
is not already on your system.  zlib can usually be found
wherever you got libpng.  zlib can be placed in another directory,
at the same level as libpng.

If your system already has a preinstalled zlib you will still need
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-1.2.20" or "lpng109" and "zlib-1.2.1"
or "zlib121") so that you have directories called "zlib" and "libpng".

Your directory structure should look like this:

   ..       (the parent directory)
      libpng  (this directory)
          INSTALL (this file)
          README
          *.h
          *.c
          contrib
             gregbook
             pngminus
             pngsuite
             visupng
          projects
             beos
             c5builder (Borland)
             visualc6 (msvc)
             netware.txt
             wince.txt
          scripts
             makefile.*
          pngtest.png
          etc.
      zlib
          README
          *.h
          *.c
          contrib
          etc.

If the line endings in the files look funny, you may wish to get the other
distribution of libpng.  It is available in both tar.gz (UNIX style line
endings) and zip (DOS style line endings) formats.

If you are building libpng with MSVC, you can enter the
libpng projects\visualc6 directory and follow the instructions in
projects\visualc6\README.txt.

You can build libpng for WindowsCE by downloading and installing
the projects\wince directory as instructed in the projects\wince.txt file, and
then following the instructions in the README* files.  Similarly, you can
build libpng for Netware or Beos as instructed in projects\netware.txt
or projects\beos.

Else enter the zlib directory and follow the instructions in zlib/README,
then come back here and run "configure" or choose the appropriate
makefile.sys in the scripts directory.

The files that are presently available in the scripts directory
include

 CMakeLists.txt    =>  "cmake" script
 makefile.std      =>  Generic UNIX makefile (cc, creates static libpng.a)
 makefile.elf      =>  Linux/ELF makefile symbol versioning,
                       gcc, creates libpng12.so.0.1.2.20)
 makefile.linux    =>  Linux/ELF makefile
                       (gcc, creates libpng12.so.0.1.2.20)
 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.aix      =>  AIX/gcc makefile
 makefile.cygwin   =>  Cygwin/gcc makefile
 makefile.darwin   =>  Darwin makefile, can use on MacosX
 makefile.dec      =>  DEC Alpha UNIX makefile
 makefile.freebsd  =>  FreeBSD 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
 libpng.icc        =>  Project file for IBM VisualAge/C++ version 4.0 or later
 makefile.netbsd   =>  NetBSD/cc makefile, uses PNGGCCRD, makes libpng.so.
 makefile.ne12bsd  =>  NetBSD/cc makefile, uses PNGGCCRD,
                       makes libpng12.so
 makefile.openbsd  =>  OpenBSD makefile
 makefile.sgi      =>  Silicon Graphics IRIX makefile (cc, creates static lib)
 makefile.sggcc    =>  Silicon Graphics (gcc,
                       creates libpng12.so.0.1.2.20)
 makefile.sunos    =>  Sun makefile
 makefile.solaris  =>  Solaris 2.X makefile (gcc,
                       creates libpng12.so.0.1.2.20)
 makefile.solaris-x86 =>  Solaris/intelMMX 2.X makefile (gcc,
                       creates libpng12.so.0.1.2.20)
 makefile.so9      =>  Solaris 9 makefile (gcc,
                       creates libpng12.so.0.1.2.20)
 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
 makefile.mips     =>  MIPS makefile
 makefile.acorn    =>  Acorn makefile
 makefile.amiga    =>  Amiga makefile
 smakefile.ppc     =>  AMIGA smakefile for SAS C V6.58/7.00 PPC compiler
                       (Requires SCOPTIONS, copied from scripts/SCOPTIONS.ppc)
 makefile.atari    =>  Atari makefile
 makefile.beos     =>  BEOS makefile for X86
 makefile.bor      =>  Borland makefile (uses bcc)
 makefile.bc32     =>  32-bit Borland C++ (all modules compiled in C mode)
 makefile.tc3      =>  Turbo C 3.0 makefile
 makefile.dj2      =>  DJGPP 2 makefile
 makefile.msc      =>  Microsoft C makefile
 makefile.vcwin32  =>  makefile for Microsoft Visual C++ 4.0 and later
 makefile.os2      =>  OS/2 Makefile (gcc and emx, requires pngos2.def)
 pngos2.def        =>  OS/2 module definition file used by makefile.os2
 makefile.watcom   =>  Watcom 10a+ Makefile, 32-bit flat memory model
 makevms.com       =>  VMS build script
 descrip.mms       =>  VMS makefile for MMS or MMK
 SCOPTIONS.ppc     =>  Used with smakefile.ppc

Copy the file (or files) that you need from the
scripts directory into this directory, for example

   MSDOS example: copy scripts\makefile.msc makefile
   UNIX example:    cp scripts/makefile.std makefile

Read the makefile to see if you need to change any source or
target directories to match your preferences.

Then read pngconf.h to see if you want to make any configuration
changes.

Then just run "make" which will create the libpng library in
this directory and "make test" which will run a quick test that reads
the "pngtest.png" file and writes a "pngout.png" file that should be
identical to it.  Look for "9782 zero samples" in the output of the
test.  For more confidence, you can run another test by typing
"pngtest pngnow.png" and looking for "289 zero samples" in the output.
Also, you can run "pngtest -m contrib/pngsuite/*.png" and compare
your output with the result shown in contrib/pngsuite/README.

Most of the makefiles will allow you to run "make install" to
put the library in its final resting place (if you want to
do that, run "make install" in the zlib directory first if necessary).
Some also allow you to run "make test-installed" after you have
run "make install".

If you encounter a compiler error message complaining about the
lines
      __png.h__ already includes setjmp.h;
      __dont__ include it again.;
This means you have compiled another module that includes setjmp.h,
which is hazardous because the two modules might not include exactly
the same setjmp.h.  If you are sure that you know what you are doing
and that they are exactly the same, then you can comment out or
delete the two lines.  Better yet, use the cexcept interface
instead, as demonstrated in contrib/visupng of the libpng distribution.

Further information can be found in the README and libpng.txt
files, in the individual makefiles, in png.h, and the manual pages
libpng.3 and png.5.
Commit	Line	Data
	1
	2	Installing libpng version 1.2.20 - September 8, 2007
	3
	4	On Unix/Linux and similar systems, you can simply type
	5
	6	./configure [--prefix=/path]
	7	make check
	8	make install
	9
	10	and ignore the rest of this document.
	11
	12	If configure does not work on your system and you have a reasonably
	13	up-to-date set of tools, running ./autogen.sh before running ./configure
	14	may fix the problem. You can also run the individual commands in
	15	autogen.sh with the --force option, if supported by your version of
	16	the tools. If you run 'libtoolize --force', though, this will replace
	17	the distributed, patched, version of ltmain.sh with an unpatched version
	18	and your shared library builds may fail to produce libraries with the
	19	correct version numbers.
	20
	21	Instead, you can use one of the custom-built makefiles in the
	22	"scripts" directory
	23
	24	cp scripts/makefile.system makefile
	25	make test
	26	make install
	27
	28	Or you can use one of the "projects" in the "projects" directory.
	29
	30	If you want to use "cmake" (see www.cmake.org), copy CMakeLists.txt
	31	from the "scripts" directory to this directory and type
	32
	33	cmake . [-DPNG_MMX=YES] -DCMAKE_INSTALL_PREFIX=/path
	34	make
	35	make install
	36
	37	Before installing libpng, you must first install zlib, if it
	38	is not already on your system. zlib can usually be found
	39	wherever you got libpng. zlib can be placed in another directory,
	40	at the same level as libpng.
	41
	42	If your system already has a preinstalled zlib you will still need
	43	to have access to the zlib.h and zconf.h include files that
	44	correspond to the version of zlib that's installed.
	45
	46	You can rename the directories that you downloaded (they
	47	might be called "libpng-1.2.20" or "lpng109" and "zlib-1.2.1"
	48	or "zlib121") so that you have directories called "zlib" and "libpng".
	49
	50	Your directory structure should look like this:
	51
	52	.. (the parent directory)
	53	libpng (this directory)
	54	INSTALL (this file)
	55	README
	56	*.h
	57	*.c
	58	contrib
	59	gregbook
	60	pngminus
	61	pngsuite
	62	visupng
	63	projects
	64	beos
	65	c5builder (Borland)
	66	visualc6 (msvc)
	67	netware.txt
	68	wince.txt
	69	scripts
	70	makefile.*
	71	pngtest.png
	72	etc.
	73	zlib
	74	README
	75	*.h
	76	*.c
	77	contrib
	78	etc.
	79
	80	If the line endings in the files look funny, you may wish to get the other
	81	distribution of libpng. It is available in both tar.gz (UNIX style line
	82	endings) and zip (DOS style line endings) formats.
	83
	84	If you are building libpng with MSVC, you can enter the
	85	libpng projects\visualc6 directory and follow the instructions in
	86	projects\visualc6\README.txt.
	87
	88	You can build libpng for WindowsCE by downloading and installing
	89	the projects\wince directory as instructed in the projects\wince.txt file, and
	90	then following the instructions in the README* files. Similarly, you can
	91	build libpng for Netware or Beos as instructed in projects\netware.txt
	92	or projects\beos.
	93
	94	Else enter the zlib directory and follow the instructions in zlib/README,
	95	then come back here and run "configure" or choose the appropriate
	96	makefile.sys in the scripts directory.
	97
	98	The files that are presently available in the scripts directory
	99	include
	100
	101	CMakeLists.txt => "cmake" script
	102	makefile.std => Generic UNIX makefile (cc, creates static libpng.a)
	103	makefile.elf => Linux/ELF makefile symbol versioning,
	104	gcc, creates libpng12.so.0.1.2.20)
	105	makefile.linux => Linux/ELF makefile
	106	(gcc, creates libpng12.so.0.1.2.20)
	107	makefile.gcc => Generic makefile (gcc, creates static libpng.a)
	108	makefile.knr => Archaic UNIX Makefile that converts files with
	109	ansi2knr (Requires ansi2knr.c from
	110	ftp://ftp.cs.wisc.edu/ghost)
	111	makefile.aix => AIX/gcc makefile
	112	makefile.cygwin => Cygwin/gcc makefile
	113	makefile.darwin => Darwin makefile, can use on MacosX
	114	makefile.dec => DEC Alpha UNIX makefile
	115	makefile.freebsd => FreeBSD makefile
	116	makefile.hpgcc => HPUX makefile using gcc
	117	makefile.hpux => HPUX (10.20 and 11.00) makefile
	118	makefile.hp64 => HPUX (10.20 and 11.00) makefile, 64-bit
	119	makefile.ibmc => IBM C/C++ version 3.x for Win32 and OS/2 (static)
	120	makefile.intel => Intel C/C++ version 4.0 and later
	121	libpng.icc => Project file for IBM VisualAge/C++ version 4.0 or later
	122	makefile.netbsd => NetBSD/cc makefile, uses PNGGCCRD, makes libpng.so.
	123	makefile.ne12bsd => NetBSD/cc makefile, uses PNGGCCRD,
	124	makes libpng12.so
	125	makefile.openbsd => OpenBSD makefile
	126	makefile.sgi => Silicon Graphics IRIX makefile (cc, creates static lib)
	127	makefile.sggcc => Silicon Graphics (gcc,
	128	creates libpng12.so.0.1.2.20)
	129	makefile.sunos => Sun makefile
	130	makefile.solaris => Solaris 2.X makefile (gcc,
	131	creates libpng12.so.0.1.2.20)
	132	makefile.solaris-x86 => Solaris/intelMMX 2.X makefile (gcc,
	133	creates libpng12.so.0.1.2.20)
	134	makefile.so9 => Solaris 9 makefile (gcc,
	135	creates libpng12.so.0.1.2.20)
	136	makefile.32sunu => Sun Ultra 32-bit makefile
	137	makefile.64sunu => Sun Ultra 64-bit makefile
	138	makefile.sco => For SCO OSr5 ELF and Unixware 7 with Native cc
	139	makefile.mips => MIPS makefile
	140	makefile.acorn => Acorn makefile
	141	makefile.amiga => Amiga makefile
	142	smakefile.ppc => AMIGA smakefile for SAS C V6.58/7.00 PPC compiler
	143	(Requires SCOPTIONS, copied from scripts/SCOPTIONS.ppc)
	144	makefile.atari => Atari makefile
	145	makefile.beos => BEOS makefile for X86
	146	makefile.bor => Borland makefile (uses bcc)
	147	makefile.bc32 => 32-bit Borland C++ (all modules compiled in C mode)
	148	makefile.tc3 => Turbo C 3.0 makefile
	149	makefile.dj2 => DJGPP 2 makefile
	150	makefile.msc => Microsoft C makefile
	151	makefile.vcwin32 => makefile for Microsoft Visual C++ 4.0 and later
	152	makefile.os2 => OS/2 Makefile (gcc and emx, requires pngos2.def)
	153	pngos2.def => OS/2 module definition file used by makefile.os2
	154	makefile.watcom => Watcom 10a+ Makefile, 32-bit flat memory model
	155	makevms.com => VMS build script
	156	descrip.mms => VMS makefile for MMS or MMK
	157	SCOPTIONS.ppc => Used with smakefile.ppc
	158
	159	Copy the file (or files) that you need from the
	160	scripts directory into this directory, for example
	161
	162	MSDOS example: copy scripts\makefile.msc makefile
	163	UNIX example: cp scripts/makefile.std makefile
	164
	165	Read the makefile to see if you need to change any source or
	166	target directories to match your preferences.
	167
	168	Then read pngconf.h to see if you want to make any configuration
	169	changes.
	170
	171	Then just run "make" which will create the libpng library in
	172	this directory and "make test" which will run a quick test that reads
	173	the "pngtest.png" file and writes a "pngout.png" file that should be
	174	identical to it. Look for "9782 zero samples" in the output of the
	175	test. For more confidence, you can run another test by typing
	176	"pngtest pngnow.png" and looking for "289 zero samples" in the output.
	177	Also, you can run "pngtest -m contrib/pngsuite/*.png" and compare
	178	your output with the result shown in contrib/pngsuite/README.
	179
	180	Most of the makefiles will allow you to run "make install" to
	181	put the library in its final resting place (if you want to
	182	do that, run "make install" in the zlib directory first if necessary).
	183	Some also allow you to run "make test-installed" after you have
	184	run "make install".
	185
	186	If you encounter a compiler error message complaining about the
	187	lines
	188	__png.h__ already includes setjmp.h;
	189	__dont__ include it again.;
	190	This means you have compiled another module that includes setjmp.h,
	191	which is hazardous because the two modules might not include exactly
	192	the same setjmp.h. If you are sure that you know what you are doing
	193	and that they are exactly the same, then you can comment out or
	194	delete the two lines. Better yet, use the cexcept interface
	195	instead, as demonstrated in contrib/visupng of the libpng distribution.
	196
	197	Further information can be found in the README and libpng.txt
	198	files, in the individual makefiles, in png.h, and the manual pages
	199	libpng.3 and png.5.