mirror of https://git.tukaani.org/xz.git
497 lines
20 KiB
Plaintext
497 lines
20 KiB
Plaintext
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XZ Utils Installation
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=====================
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0. Preface
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1. Supported platforms
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1.1. Compilers
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1.2. Platform-specific notes
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1.2.1. AIX
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1.2.2. IRIX
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1.2.3. MINIX 3
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1.2.4. OpenVMS
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1.2.5. Solaris, OpenSolaris, and derivatives
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1.2.6. Tru64
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1.2.7. Windows
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1.2.8. DOS
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1.3. Adding support for new platforms
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2. configure options
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2.1. Static vs. dynamic linking of liblzma
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2.2. Optimizing xzdec and lzmadec
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3. xzgrep and other scripts
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3.1. Dependencies
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3.2. PATH
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4. Troubleshooting
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4.1. "No C99 compiler was found."
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4.2. "No POSIX conforming shell (sh) was found."
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4.3. configure works but build fails at crc32_x86.S
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4.4. Lots of warnings about symbol visibility
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4.5. "make check" fails
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4.6. liblzma.so (or similar) not found when running xz
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0. Preface
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----------
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If you aren't familiar with building packages that use GNU Autotools,
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see the file INSTALL.generic for generic instructions before reading
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further.
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If you are going to build a package for distribution, see also the
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file PACKAGERS. It contains information that should help making the
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binary packages as good as possible, but the information isn't very
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interesting to those making local builds for private use or for use
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in special situations like embedded systems.
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1. Supported platforms
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----------------------
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XZ Utils are developed on GNU/Linux, but they should work on many
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POSIX-like operating systems like *BSDs and Solaris, and even on
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a few non-POSIX operating systems.
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1.1. Compilers
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A C99 compiler is required to compile XZ Utils. If you use GCC, you
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need at least version 3.x.x. GCC version 2.xx.x doesn't support some
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C99 features used in XZ Utils source code, thus GCC 2 won't compile
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XZ Utils.
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XZ Utils takes advantage of some GNU C extensions when building
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with GCC. Because these extensions are used only when building
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with GCC, it should be possible to use any C99 compiler.
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1.2. Platform-specific notes
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1.2.1. AIX
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If you use IBM XL C compiler, pass CC=xlc_r to configure. If
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you use CC=xlc instead, you must disable threading support
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with --disable-threads (usually not recommended).
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1.2.2. IRIX
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MIPSpro 7.4.4m has been reported to produce broken code if using
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the -O2 optimization flag ("make check" fails). Using -O1 should
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work.
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A problem has been reported when using shared liblzma. Passing
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--disable-shared to configure works around this. Alternatively,
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putting "-64" to CFLAGS to build a 64-bit version might help too.
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1.2.3. MINIX 3
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The default install of MINIX 3 includes Amsterdam Compiler Kit (ACK),
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which doesn't support C99. Install GCC to compile XZ Utils.
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MINIX 3.1.8 and older have bugs in /usr/include/stdint.h, which has
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to be patched before XZ Utils can be compiled correctly. See
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<http://gforge.cs.vu.nl/gf/project/minix/tracker/?action=TrackerItemEdit&tracker_item_id=537>.
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MINIX 3.2.0 and later use a different libc and aren't affected by
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the above bug.
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XZ Utils doesn't have code to detect the amount of physical RAM and
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number of CPU cores on MINIX 3.
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See section 4.4 in this file about symbol visibility warnings (you
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may want to pass gl_cv_cc_visibility=no to configure).
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1.2.4. OpenVMS
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XZ Utils can be built for OpenVMS, but the build system files
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are not included in the XZ Utils source package. The required
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OpenVMS-specific files are maintained by Jouk Jansen and can be
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downloaded here:
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http://nchrem.tnw.tudelft.nl/openvms/software2.html#xzutils
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1.2.5. Solaris, OpenSolaris, and derivatives
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The following linker error has been reported on some x86 systems:
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ld: fatal: relocation error: R_386_GOTOFF: ...
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This can be worked around by passing gl_cv_cc_visibility=no
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as an argument to the configure script.
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1.2.6. Tru64
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If you try to use the native C compiler on Tru64 (passing CC=cc to
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configure), you may need the workaround mention in section 4.1 in
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this file (pass also ac_cv_prog_cc_c99= to configure).
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1.2.7. Windows
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Building XZ Utils on Windows is supported under MinGW + MSYS,
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MinGW-w64 + MSYS, and Cygwin. There is windows/build.bash to
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ease packaging XZ Utils with MinGW(-w64) + MSYS into a
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redistributable .zip or .7z file. See windows/INSTALL-Windows.txt
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for more information.
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It might be possible to build liblzma with a non-GNU toolchain too,
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but that will probably require writing a separate makefile. Building
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the command line tools with non-GNU toolchains will be harder than
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building only liblzma.
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Even if liblzma is built with MinGW, the resulting DLL or static
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library can be used by other compilers and linkers, including MSVC.
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Thus, it shouldn't be a problem to use MinGW to build liblzma even
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if you cannot use MinGW to build the rest of your project. See
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windows/README-Windows.txt for details.
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1.2.8. DOS
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There is an experimental Makefile in the "dos" directory to build
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XZ Utils on DOS using DJGPP. Support for long file names (LFN) is
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needed. See dos/README for more information.
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GNU Autotools based build hasn't been tried on DOS. If you try, I
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would like to hear if it worked.
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1.3. Adding support for new platforms
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If you have written patches to make XZ Utils to work on previously
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unsupported platform, please send the patches to me! I will consider
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including them to the official version. It's nice to minimize the
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need of third-party patching.
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One exception: Don't request or send patches to change the whole
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source package to C89. I find C99 substantially nicer to write and
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maintain. However, the public library headers must be in C89 to
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avoid frustrating those who maintain programs, which are strictly
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in C89 or C++.
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2. configure options
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--------------------
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In most cases, the defaults are what you want. Many of the options
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below are useful only when building a size-optimized version of
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liblzma or command line tools.
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--enable-encoders=LIST
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--disable-encoders
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Specify a comma-separated LIST of filter encoders to
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build. See "./configure --help" for exact list of
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available filter encoders. The default is to build all
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supported encoders.
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If LIST is empty or --disable-encoders is used, no filter
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encoders will be built and also the code shared between
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encoders will be omitted.
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Disabling encoders will remove some symbols from the
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liblzma ABI, so this option should be used only when it
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is known to not cause problems.
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--enable-decoders=LIST
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--disable-decoders
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This is like --enable-encoders but for decoders. The
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default is to build all supported decoders.
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--enable-match-finders=LIST
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liblzma includes two categories of match finders:
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hash chains and binary trees. Hash chains (hc3 and hc4)
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are quite fast but they don't provide the best compression
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ratio. Binary trees (bt2, bt3 and bt4) give excellent
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compression ratio, but they are slower and need more
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memory than hash chains.
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You need to enable at least one match finder to build the
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LZMA1 or LZMA2 filter encoders. Usually hash chains are
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used only in the fast mode, while binary trees are used to
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when the best compression ratio is wanted.
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The default is to build all the match finders if LZMA1
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or LZMA2 filter encoders are being built.
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--enable-checks=LIST
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liblzma support multiple integrity checks. CRC32 is
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mandatory, and cannot be omitted. See "./configure --help"
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for exact list of available integrity check types.
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liblzma and the command line tools can decompress files
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which use unsupported integrity check type, but naturally
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the file integrity cannot be verified in that case.
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Disabling integrity checks may remove some symbols from
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the liblzma ABI, so this option should be used only when
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it is known to not cause problems.
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--disable-xz
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--disable-xzdec
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--disable-lzmadec
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--disable-lzmainfo
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Don't build and install the command line tool mentioned
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in the option name.
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NOTE: Disabling xz will skip some tests in "make check".
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NOTE: If xzdec is disabled and lzmadec is left enabled,
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a dangling man page symlink lzmadec.1 -> xzdec.1 is
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created.
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--disable-lzma-links
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Don't create symlinks for LZMA Utils compatibility.
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This includes lzma, unlzma, and lzcat. If scripts are
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installed, also lzdiff, lzcmp, lzgrep, lzegrep, lzfgrep,
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lzmore, and lzless will be omitted if this option is used.
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--disable-scripts
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Don't install the scripts xzdiff, xzgrep, xzmore, xzless,
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and their symlinks.
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--disable-doc
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Don't install the documentation files to $docdir
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(often /usr/doc/xz or /usr/local/doc/xz). Man pages
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will still be installed. The $docdir can be changed
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with --docdir=DIR.
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--disable-assembler
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liblzma includes some assembler optimizations. Currently
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there is only assembler code for CRC32 and CRC64 for
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32-bit x86.
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All the assembler code in liblzma is position-independent
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code, which is suitable for use in shared libraries and
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position-independent executables. So far only i386
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instructions are used, but the code is optimized for i686
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class CPUs. If you are compiling liblzma exclusively for
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pre-i686 systems, you may want to disable the assembler
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code.
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--enable-unaligned-access
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Allow liblzma to use unaligned memory access for 16-bit
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and 32-bit loads and stores. This should be enabled only
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when the hardware supports this, i.e. when unaligned
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access is fast. Some operating system kernels emulate
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unaligned access, which is extremely slow. This option
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shouldn't be used on systems that rely on such emulation.
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Unaligned access is enabled by default on x86, x86-64,
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and big endian PowerPC.
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--enable-small
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Reduce the size of liblzma by selecting smaller but
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semantically equivalent version of some functions, and
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omit precomputed lookup tables. This option tends to
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make liblzma slightly slower.
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Note that while omitting the precomputed tables makes
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liblzma smaller on disk, the tables are still needed at
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run time, and need to be computed at startup. This also
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means that the RAM holding the tables won't be shared
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between applications linked against shared liblzma.
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This option doesn't modify CFLAGS to tell the compiler
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to optimize for size. You need to add -Os or equivalent
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flag(s) to CFLAGS manually.
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--enable-assume-ram=SIZE
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On the most common operating systems, XZ Utils is able to
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detect the amount of physical memory on the system. This
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information is used by the options --memlimit-compress,
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--memlimit-decompress, and --memlimit when setting the
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limit to a percentage of total RAM.
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On some systems, there is no code to detect the amount of
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RAM though. Using --enable-assume-ram one can set how much
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memory to assume on these systems. SIZE is given as MiB.
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The default is 128 MiB.
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Feel free to send patches to add support for detecting
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the amount of RAM on the operating system you use. See
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src/common/tuklib_physmem.c for details.
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--disable-threads
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Disable threading support. This makes some things
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thread-unsafe, meaning that if multithreaded application
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calls liblzma functions from more than one thread,
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something bad may happen.
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Use this option if threading support causes you trouble,
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or if you know that you will use liblzma only from
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single-threaded applications and want to avoid dependency
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on libpthread.
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--enable-debug
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This enables the assert() macro and possibly some other
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run-time consistency checks. It makes the code slower, so
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you normally don't want to have this enabled.
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--enable-werror
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If building with GCC, make all compiler warnings an error,
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that abort the compilation. This may help catching bugs,
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and should work on most systems. This has no effect on the
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resulting binaries.
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2.1. Static vs. dynamic linking of liblzma
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On 32-bit x86, linking against static liblzma can give a minor
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speed improvement. Static libraries on x86 are usually compiled as
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position-dependent code (non-PIC) and shared libraries are built as
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position-independent code (PIC). PIC wastes one register, which can
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make the code slightly slower compared to a non-PIC version. (Note
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that this doesn't apply to x86-64.)
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If you want to link xz against static liblzma, the simplest way
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is to pass --disable-shared to configure. If you want also shared
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liblzma, run configure again and run "make install" only for
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src/liblzma.
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2.2. Optimizing xzdec and lzmadec
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xzdec and lzmadec are intended to be relatively small instead of
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optimizing for the best speed. Thus, it is a good idea to build
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xzdec and lzmadec separately:
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- To link the tools against static liblzma, pass --disable-shared
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to configure.
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- To select somewhat size-optimized variant of some things in
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liblzma, pass --enable-small to configure.
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- Tell the compiler to optimize for size instead of speed.
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E.g. with GCC, put -Os into CFLAGS.
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- xzdec and lzmadec will never use multithreading capabilities of
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liblzma. You can avoid dependency on libpthread by passing
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--disable-threads to configure.
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- There are and will be no translated messages for xzdec and
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lzmadec, so it is fine to pass also --disable-nls to configure.
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- Only decoder code is needed, so you can speed up the build
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slightly by passing --disable-encoders to configure. This
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shouldn't affect the final size of the executables though,
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because the linker is able to omit the encoder code anyway.
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If you have no use for xzdec or lzmadec, you can disable them with
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--disable-xzdec and --disable-lzmadec.
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3. xzgrep and other scripts
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---------------------------
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3.1. Dependencies
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POSIX shell (sh) and bunch of other standard POSIX tools are required
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to run the scripts. The configure script tries to find a POSIX
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compliant sh, but if it fails, you can force the shell by passing
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gl_cv_posix_shell=/path/to/posix-sh as an argument to the configure
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script.
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Some of the scripts require also mktemp. The original mktemp can be
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found from <http://www.mktemp.org/>. On GNU, most will use the mktemp
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program from GNU coreutils instead of the original implementation.
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Both mktemp versions are fine for XZ Utils (and practically for
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everything else too).
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3.2. PATH
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The scripts assume that the required tools (standard POSIX utilities,
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mktemp, and xz) are in PATH; the scripts don't set the PATH themselves.
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Some people like this while some think this is a bug. Those in the
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latter group can easily patch the scripts before running the configure
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script by taking advantage of a placeholder line in the scripts.
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For example, to make the scripts prefix /usr/bin:/bin to PATH:
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perl -pi -e 's|^#SET_PATH.*$|PATH=/usr/bin:/bin:\$PATH|' \
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src/scripts/xz*.in
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4. Troubleshooting
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------------------
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4.1. "No C99 compiler was found."
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You need a C99 compiler to build XZ Utils. If the configure script
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cannot find a C99 compiler and you think you have such a compiler
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installed, set the compiler command by passing CC=/path/to/c99 as
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an argument to the configure script.
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If you get this error even when you think your compiler supports C99,
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you can override the test by passing ac_cv_prog_cc_c99= as an argument
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to the configure script. The test for C99 compiler is not perfect (and
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it is not as easy to make it perfect as it sounds), so sometimes this
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may be needed. You will get a compile error if your compiler doesn't
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support enough C99.
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4.2. "No POSIX conforming shell (sh) was found."
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xzgrep and other scripts need a shell that (roughly) conforms
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to POSIX. The configure script tries to find such a shell. If
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it fails, you can force the shell to be used by passing
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gl_cv_posix_shell=/path/to/posix-sh as an argument to the configure
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script.
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4.3. configure works but build fails at crc32_x86.S
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The easy fix is to pass --disable-assembler to the configure script.
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The configure script determines if assembler code can be used by
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looking at the configure triplet; there is currently no check if
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the assembler code can actually actually be built. The x86 assembler
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code should work on x86 GNU/Linux, *BSDs, Solaris, Darwin, MinGW,
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Cygwin, and DJGPP. On other x86 systems, there may be problems and
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the assembler code may need to be disabled with the configure option.
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If you get this error when building for x86-64, you have specified or
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the configure script has misguessed your architecture. Pass the
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correct configure triplet using the --build=CPU-COMPANY-SYSTEM option
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(see INSTALL.generic).
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4.4. Lots of warnings about symbol visibility
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On some systems where symbol visibility isn't supported, GCC may
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still accept the visibility options and attributes, which will make
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configure think that visibility is supported. This will result in
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many compiler warnings. You can avoid the warnings by forcing the
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visibility support off by passing gl_cv_cc_visibility=no as an
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argument to the configure script. This has no effect on the
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resulting binaries, but fewer warnings looks nicer and may allow
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using --enable-werror.
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4.5. "make check" fails
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A likely reason is that libtool links the test programs against
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an installed version of liblzma instead of the version that was
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just built. This is obviously a bug which seems to happen on
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some platforms. A workaround is to uninstall the old liblzma
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versions first.
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If the problem isn't the one described above, then it's likely
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a bug in XZ Utils or in the compiler. See the platform-specific
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notes in this file for possible known problems. Please report
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a bug if you cannot solve the problem. See README for contact
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information.
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4.6. liblzma.so (or similar) not found when running xz
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If you installed the package with "make install" and get an error
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about liblzma.so (or a similarly named file) being missing, try
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running "ldconfig" to update the run-time linker cache (if your
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operating system has such a command).
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