144 lines
5.1 KiB
Plaintext
144 lines
5.1 KiB
Plaintext
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Installing libpng version 1.5.0beta21 - April 25, 2010
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On Unix/Linux and similar systems, you can simply type
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./configure [--prefix=/path]
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make check
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make install
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and ignore the rest of this document.
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If configure does not work on your system and you have a reasonably
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up-to-date set of tools, running ./autogen.sh before running ./configure
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may fix the problem. You can also run the individual commands in
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autogen.sh with the --force option, if supported by your version of
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the tools. If you run 'libtoolize --force', though, this will replace
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the distributed, patched, version of ltmain.sh with an unpatched version
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and your shared library builds may fail to produce libraries with the
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correct version numbers.
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Instead, you can use one of the custom-built makefiles in the
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"scripts" directory
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cp scripts/makefile.system makefile
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make test
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make install
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The files that are presently available in the scripts directory
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are listed and described in scripts/README.txt.
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Or you can use one of the "projects" in the "projects" directory.
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Before installing libpng, you must first install zlib, if it
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is not already on your system. zlib can usually be found
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wherever you got libpng. zlib can be placed in another directory,
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at the same level as libpng.
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If you want to use "cmake" (see www.cmake.org), type
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cmake . -DCMAKE_INSTALL_PREFIX=/path
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make
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make install
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If your system already has a preinstalled zlib you will still need
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to have access to the zlib.h and zconf.h include files that
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correspond to the version of zlib that's installed.
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You can rename the directories that you downloaded (they
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might be called "libpng-1.5.0beta21" or "libpng15" and "zlib-1.2.3"
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or "zlib123") so that you have directories called "zlib" and "libpng".
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Your directory structure should look like this:
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.. (the parent directory)
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libpng (this directory)
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INSTALL (this file)
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README
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*.h
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*.c
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CMakeLists.txt => "cmake" script
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configuration files:
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configure.ac, configure, Makefile.am, Makefile.in,
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autogen.sh, config.guess, ltmain.sh, missing,
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aclocal.m4, config.h.in, config.sub,
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depcomp, install-sh, mkinstalldirs, test-pngtest.sh
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contrib
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gregbook
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pngminim
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pngminus
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pngsuite
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visupng
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projects
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cbuilder5 (Borland)
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visualc6 (msvc)
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visualc71
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xcode
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scripts
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makefile.*
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*.def (module definition files)
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pngtest.png
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etc.
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zlib
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README
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*.h
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*.c
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contrib
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etc.
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If the line endings in the files look funny, you may wish to get the other
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distribution of libpng. It is available in both tar.gz (UNIX style line
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endings) and zip (DOS style line endings) formats.
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If you are building libpng with MSVC, you can enter the
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libpng projects\visualc6 or visualc71 directory and follow the instructions
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in README.txt.
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Otherwise enter the zlib directory and follow the instructions in zlib/README,
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then come back here and run "configure" or choose the appropriate
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makefile.sys in the scripts directory.
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Copy the file (or files) that you need from the
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scripts directory into this directory, for example
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MSDOS example: copy scripts\makefile.msc makefile
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UNIX example: cp scripts/makefile.std makefile
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Read the makefile to see if you need to change any source or
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target directories to match your preferences.
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Then read pngconf.h to see if you want to make any configuration
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changes.
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Then just run "make" which will create the libpng library in
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this directory and "make test" which will run a quick test that reads
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the "pngtest.png" file and writes a "pngout.png" file that should be
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identical to it. Look for "9782 zero samples" in the output of the
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test. For more confidence, you can run another test by typing
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"pngtest pngnow.png" and looking for "289 zero samples" in the output.
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Also, you can run "pngtest -m contrib/pngsuite/*.png" and compare
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your output with the result shown in contrib/pngsuite/README.
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Most of the makefiles will allow you to run "make install" to
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put the library in its final resting place (if you want to
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do that, run "make install" in the zlib directory first if necessary).
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Some also allow you to run "make test-installed" after you have
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run "make install".
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If you encounter a compiler error message complaining about the
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lines
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__png.h__ already includes setjmp.h;
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__dont__ include it again.;
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this means you have compiled another module that includes setjmp.h,
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which is hazardous because the two modules might not include exactly
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the same setjmp.h. If you are sure that you know what you are doing
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and that they are exactly the same, then you can comment out or
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delete the two lines. Better yet, use the cexcept interface
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instead, as demonstrated in contrib/visupng of the libpng distribution.
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Further information can be found in the README and libpng.txt
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files, in the individual makefiles, in png.h, and the manual pages
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libpng.3 and png.5.
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