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GNU Libtool *********** 1. Introduction =============== This is GNU Libtool, a generic library support script. Libtool hides the complexity of using shared libraries behind a consistent, portable interface. Libtool's home page is: http://www.gnu.org/software/libtool/libtool.html See the file NEWS for a description of recent changes to Libtool. Please note that you can build GNU Libtool from this directory using a vendor Make program as long as this is an official release tarball; otherwise you will need GNU Make for sane VPATH support. See the file INSTALL for complete generic instructions on how to build and install Libtool. Also, see the file doc/notes.txt for some platform- specific information. See the info node (libtool)Tested Platforms. (or the file doc/PLATFORMS) for a list of platforms that Libtool already supports. Please try it on all the platforms you have access to: * If it builds and passes the test suite (`gmake check'), please send a short note to the libtool mailing list <libtool@gnu.org> with a subject line including the string `[PLATFORM]', and containing the details from the end of `./libtool --help' in the body. * Otherwise, see `Reporting Bugs' below for how to help us fix any problems you discover. To use Libtool, add the new generic library building commands to your Makefile, Makefile.in, or Makefile.am. See the documentation for details. 2. Reporting Bugs ================= If this distribution doesn't work for you, before you report the problem, at least try upgrading to the latest released version first, and see whether the issue persists. If you feel able, you can also check whether the issue has been fixed in the development sources for the next release (see `Obtaining the Latest Sources' below). Once you've determined that your bug is still not fixed in the latest version, please send a full report to <bug-libtool@gnu.org>, including: 1. the information from the end of the help message given by `./libtool --help', and the verbose output of any failed tests (see `The Test Suites' immediately below); 2. complete instructions for how to reproduce your bug, along with the results you were expecting, and how they differ from what you actually see; 3. a workaround or full fix for the bug, if you have it; 4. a copy of `tests/testsuite.log' if you are experiencing failures in the Autotest testsuite. 5. new test cases for the testsuite that demonstrate the bug are especially welcome, and will help to ensure that future releases don't reintroduce the problem - if you're not able to write a complete testsuite case, a simple standalone shell script is usually good enough to help us write a test for you. If you have any other suggestions, or if you wish to port Libtool to a new platform, please send email to the mailing list <libtool@gnu.org>. Please note that if you send us an non-trivial code for inclusion in a future release, we may ask you for a copyright assignment (for brief details see the `Copyright Assignment' section on our `Contributing' webpage <http://www.gnu.org/software/libtool/contribute.html>). 3. The Test Suites ================== Libtool comes with two integrated sets of tests to check that your build is sane. You can run both test suites like this, assuming that `gmake' refers to GNU make: gmake -k check If you want to run the old testsuite only, do it like this: gmake check TESTSUITEFLAGS=-V If you want to run the new testsuite only, do it like this: gmake check-local The tests of the old test suite run in groups in the various demo subdirectories, so if one of the tests early in a group FAILs, the rest of the tests in that group will be SKIPped. If you see a FAIL further into a group, even if a test with the same name PASSes in another test group, you need to take note of the name of the first test in the group if you want to rerun the group with FAILures to get verbose output. To run a test group of the old test suite in isolation (say, you think you have fixed a bug, but don't want to rerun the entire suite), you can do it like this: gmake check TESTSUITEFLAGS=-V TESTS="tests/cdemo-static.test \ tests/cdemo-static-make.test tests/cdemo-static-exec.test" Providing that you have a FAIL from the most recent group from a particular demo directory (like the cdemo-static.test group above), you can explore the state of the directory to help with debugging. If you wish to report a test group failure to the libtool list, you need to send the verbose output of the FAILing group, along with the information from the end of `$(top_builddir)/libtool --help' to the bug report mailing list, <bug-libtool@gnu.org> with a subject line that includes the string `[TEST FAILURE]'. The file test-suite.log contains the verbose output from all failed tests. In order to enable debug shell tracing, you can set VERBOSE=debug when running the old test suite. In the long run, Libtool will move to using only the new, Autotest- driven testsuite. Its usage is documented in: info Autoconf 'testsuite Invocation' but simple help may also be obtained through: gmake check-local TESTSUITEFLAGS='--help' For verbose output, add the flag `-v', for running only a subset of the independent tests, merely specify them by number or by keyword, both of which are displayed with the `--list' flag. For example, the `libtool' keyword is used for the tests that exercise only this script. So it is possible to test an installed script, possibly from a different Libtool release, with: gmake check-local \ TESTSUITEFLAGS="-k libtool LIBTOOL=/path/to/libtool" Some tests, like the one exercising max_cmd_len limits, make use of this to invoke the testsuite recursively on a subset of tests. For these tests, the variable INNER_TESTSUITEFLAGS may be used. It will be expanded right after the `-k libtool', without separating whitespace, so that further limiting of the recursive set of tests is possible. For example, to run only the template tests within the max_cmd_len, use: gmake check-local TESTSUITEFLAGS="-v -x -k max_cmd_len \ INNER_TESTSUITEFLAGS=',template -v -x'" If you wish to report test failures to the libtool list, you need to send the file `tests/testsuite.log' to the bug report mailing list, <bug-libtool@gnu.org>. 4. Obtaining the Latest Sources =============================== * With the exception of ancient releases, all official GNU Libtool releases have a detached GPG signature file. With this you can verify that the corresponding file (i.e. without the `.sig' suffix) is the same file that was released by the owner of it's GPG key ID. First, be sure to download both the .sig file and the corresponding release, then run a command like this: gpg --verify libtool-x.y.z.tar.gz.sig If that command fails because you don't have the required public key, then run this command to import it: gpg --keyserver keys.gnupg.net --recv-keys 2983D606 and then rerun the `gpg --verify' command. * Official stable releases of GNU Libtool, along with these detached signature files are available from: ftp://ftp.gnu.org/gnu/libtool To reduce load on the main server, please use one of the mirrors listed at: http://www.gnu.org/order/ftp.html * Alpha quality pre-releases of GNU Libtool, also with detached signature files are available from: ftp://alpha.gnu.org/gnu/libtool and some of the mirrors listed at: http://www.gnu.org/order/ftp.html * Nightly snapshots of the unreleased development trunk of GNU Libtool are available from: http://pogma.com/libtool These files do not have signatures, but will allow you to easily determine whether the most recent development code still exhibits any bugs you have discovered, without requiring you to install a complete build environment and the extra tools needed to bootstrap a version control checkout. * The master libtool repository is stored in git. If you are a member of the savannah group for GNU Libtool, a writable copy of the libtool repository can be obtained by: git clone <savannah-user>@git.sv.gnu.org:/srv/git/libtool.git If you are behind a firewall that blocks the git protocol, you may find it useful to use git config --global url.http://git.sv.gnu.org/r/.insteadof \ git://git.sv.gnu.org/ to force git to transparently rewrite all savannah git references to use http. If you are not a member of the savannah group for GNU Libtool, you can still fetch a read-only copy with either: git clone git://git.sv.gnu.org/libtool.git or using the CVS pserver protocol: cvs -d:pserver:anonymous@pserver.git.sv.gnu.org:/srv/git/libtool.git \ co -d libtool HEAD * Before you can build from git, you need to bootstrap. This requires: - Autoconf 2.62 or later - Automake 1.11.1 or later - Help2man 1.29 or later - Xz 4.999.8beta or later (from <http://tukaani.org/xz>) - Texinfo 4.8 or later - Any prerequisites of the above (such as m4, perl, tex) Note that these bootstrapping dependencies are much stricter than those required to use a destributed release for your own packages. After installation, GNU Libtool is designed to work either standalone, or optionally with: - Autoconf 2.59 or later - Automake 1.9.6 or later * The `bootstrap' script sets up the source directory for you to hack, though it may take quite some time to run. If you don't intend to re-run the test suite, you can speed up the `bootstrap' step by an order of magnitude if you call it like this instead: reconfdirs='. libltdl' ./bootstrap 5. Version Numbering ==================== People have complained that they find the version numbering scheme under which libtool is released confusing... so we've changed it! It works like this: <major-number>.<minor-number> Releases with a <major-number> less than 1 were not yet feature complete. Releases with a <major-number> of 1 used the old numbering scheme that everyone disliked so much. Releases with a <major-number> of 2 us the new scheme described here. If libtool ever undergoes a major rewrite or substantial restructuring, the <major-number> will be incremented again. If we make a patch release to fix bugs in a stable release, we use a third number, so: <major-number>.<minor-number>.<micro-number> Version numbers are chosen to make it easy for users to decide two things: Q: How `developed' is this release? A: The higher the number, the better! Q: How `stable' is this release? A: - If the <minor-number> is even, it is a stable release, `2.0'. - If the <minor-number> is odd, it is a development version with new features compared to the last stable release, `2.1a'. - If it has an `odd'[1] letter after the version number, it is a snapshot direct from CVS, `2.1a'. - If it has an `even'[1] letter after the version number, it is an alpha quality release, `2.1b'. - If it has three numbers in the version, it is a patch release, fixing bugs from the stable release (with no new features), `2.0.1'. [1] We always increment the letter in the repository before *and* after making a release tarball. This means that "odd" letters (a,c,e,g...) only exist in the repository, and "even" letters are used instantaneously for an alpha release. Since the odd lettered version numbers cover many states of the tree, we also qualify them by adding the cvs version of the ChangeLog: $ libtool --version ltmain.sh (GNU libtool 1.1603 2004/09/12 22:02:07) 2.1a Copyright (C) 2004 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For more details about version numbers, see: http://www.gnu.org/software/libtool/contribute.html -- Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. Written by Gary V. Vaughan, 2004 This file is part of GNU Libtool. Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. This file is offered as-is, without warranty of any kind. Local Variables: mode: text fill-column: 72 End: vim:tw=72
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