X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/4d4777c786d627f40809d5ecf8b86cc13c7cd362..efbc95a7e4fcba4363372df34f183d7db89a85a6:/README-hacking diff --git a/README-hacking b/README-hacking index b3364ac3..28870cb2 100644 --- a/README-hacking +++ b/README-hacking @@ -1,5 +1,3 @@ --*- outline -*- - This file attempts to describe the rules to use when hacking Bison. Don't put this file into the distribution. @@ -37,6 +35,13 @@ of the .output file etc. This excludes impossible error messages (comparable to assert/abort), and all the --trace output which is meant for the maintainers only. +** Horizontal tabs +Do not add horizontal tab characters to any file in Bison's repository +except where required. For example, do not use tabs to format C code. +However, make files, ChangeLog, and some regular expressions require +tabs. Also, test cases might need to contain tabs to check that Bison +properly processes tabs in its input. + * Working from the repository @@ -45,34 +50,35 @@ These requirements do not apply when building from a distribution tarball. ** Requirements -We've opted to keep only the highest-level sources in the repository. -This eases our maintenance burden, (fewer merges etc.), but imposes more +We've opted to keep only the highest-level sources in the repository. This +eases our maintenance burden, (fewer merges etc.), but imposes more requirements on anyone wishing to build from the just-checked-out sources. For example, you have to use the latest stable versions of the maintainer tools we depend upon, including: -- Automake - Autoconf +- Automake - Flex - Gettext +- Graphviz - Gzip - Perl - Rsync - Tar -Valgrind is also highly recommended, if -Valgrind supports your architecture. +Valgrind is also highly recommended, if it supports +your architecture. -Bison is written using Bison grammars, so there are bootstrapping -issues. The bootstrap script attempts to discover when the C code -generated from the grammars is out of date, and to bootstrap with an -out-of-date version of the C code, but the process is not foolproof. -Also, you may run into similar problems yourself if you modify Bison. +Bison is written using Bison grammars, so there are bootstrapping issues. +The bootstrap script attempts to discover when the C code generated from the +grammars is out of date, and to bootstrap with an out-of-date version of the +C code, but the process is not foolproof. Also, you may run into similar +problems yourself if you modify Bison. -Only building the initial full source tree will be a bit painful. -Later, after synchronizing from the repository a plain 'make' should -be sufficient. Note, however, that when gnulib is updated, running -'./bootstrap' again might be needed. +Only building the initial full source tree will be a bit painful. Later, +after synchronizing from the repository a plain 'make' should be sufficient. +Note, however, that when gnulib is updated, running './bootstrap' again +might be needed. ** First checkout @@ -124,7 +130,7 @@ import requests for updated submodules. A simple "git diff" will reveal if the current version of the submodule (i.e., the actual contents of the gnulib directory) and the current request from the subscriber (i.e., the reference of the version of gnulib that the -Bison reporitory requests) differ. To upgrade the submodules (i.e., +Bison repository requests) differ. To upgrade the submodules (i.e., to check out the version that is actually requested by the subscriber, run "git submodule update". @@ -155,7 +161,7 @@ formal release, see the ChangeLog in the latest gnulib snapshot at: http://erislabs.net/ianb/projects/gnulib/ -The autoconf files we use are currently: +The Autoconf files we use are currently: m4/m4.m4 lib/m4sugar/m4sugar.m4 @@ -170,6 +176,58 @@ decide whether to update. ** make check Use liberally. +** TESTSUITEFLAGS + +The default is for make check to run all tests sequentially. This can be +very time consumming when checking repeatedly or on slower setups. This can +be sped up in two ways: + +Using -j, in a make-like fashion, for example: + $ make check TESTSUITEFLAGS='-j8' + +Running only the tests of a certain category, as specified in the AT files +with AT_KEYWORDS([[category]]). Categories include: + - c++, for c++ parsers + - deprec, for tests concerning deprecated constructs. + - glr, for glr parsers + - java, for java parsers + - report, for automaton dumps + +To run a specific set of tests, use -k (for "keyword"). For example: + $ make check TESTSUITEFLAGS='-k c++' + +Both can be combined. + +** Typical errors +If the test suite shows failures such as the following one + + .../bison/lib/getopt.h:196:8: error: redefinition of 'struct option' + /usr/include/getopt.h:54:8: error: previous definition of 'struct option' + +it probably means that some file was compiled without +AT_DATA_SOURCE_PROLOGUE. This error is due to the fact that our -I options +pick up gnulib's replacement headers, such as getopt.h, and this will go +wrong if config.h was not included first. + +See tests/local.at for details. + +** make maintainer-check-valgrind +This target uses valgrind both to check bison, and the generated parsers. + +This is not mature on Mac OS X. First, Valgrind does support the way bison +calls m4, so Valgrind cannot be used to check bison on Mac OS X. + +Second, there are many errors that come from the platform itself, not from +bison. build-aux/darwin11.4.0.valgrind addresses some of them. + +Third, valgrind issues warnings such as: + + --99312:0:syswrap- WARNING: Ignoring sigreturn( ..., UC_RESET_ALT_STACK ); + +which cause the test to fail uselessly. It is hard to ignore these errors +with a major overhaul of the way instrumentation is performed in the test +suite. So currently, do not try to run valgrind on Mac OS X. + ** Release checks Try to run the test suite with more severe conditions before a release: @@ -211,6 +269,9 @@ release: that it does not make sense for glr.c, which should be ANSI, but currently is actually GNU C, nor for lalr1.cc. +- Test with a very recent version of GCC for both C and C++. Testing + with older versions that are still in use is nice too. + * Release Procedure This section needs to be updated to take into account features from @@ -248,25 +309,13 @@ copyright statement for each Bison file, check the copyright statements that the skeletons insert into generated parsers, and check all occurrences of PACKAGE_COPYRIGHT_YEAR in configure.ac. -** Update NEWS -The version number, *and* the date of the release (including for -betas). +** Update NEWS, commit and tag. +See do-release-commit-and-tag in README-release. For a while, we used +beta names such as "2.6_rc1". Now that we use gnulib in the release +procedure, we must use "2.5.90", which has the additional benefit of +being properly sorted in "git tag -l". -** Mention the release name in a commit message -Should have an entry similar to "Version 2.3b.". - -** Tag the release -Before Bison will build with the right version number, you must tag -the release in git. Do this after all other changes. The command is -similar to: - - git tag -a v2.3b -m "Bison 2.3b." - -** Push -Once "make distcheck" passes, push your changes and the tag. -"git push" without arguments will not push the tag. - -** make alpha, beta, or release +** make alpha, beta, or stable See README-release. ** Upload @@ -287,8 +336,8 @@ where F125BDF3 should be replaced with your key ID. *** Using gnupload You need "ncftp". -At the end "make release" (or alpha/beta) will display the prodecure -to run. Just copy and paste it in your shell. +At the end "make stable" (or alpha/beta) will display the procedure to +run. Just copy and paste it in your shell. *** By hand @@ -359,7 +408,8 @@ function 'index', once for the table of contents); you can ignore this issue. ** Announce -To generate a template announcement file: +The "make stable" (or alpha/beta) command just created a template, +$HOME/announce-bison-X.Y. Otherwise, to generate it, run: make RELEASE_TYPE=alpha gpg_key_ID=F125BDF3 announcement @@ -379,18 +429,18 @@ newsgroup by sending email to compilers@iecc.com. Do not make any Cc as the moderator will throw away anything cross-posted or Cc'ed. It really needs to be a separate message. -** Bump the version number -In configure.ac. Run "make". So that developers don't accidentally add new -items to the old NEWS entry, create a new empty NEWS entry something like: +** Prepare NEWS +So that developers don't accidentally add new items to the old NEWS +entry, create a new empty entry in line 3 (without the two leading +spaces): - Changes in version ?.? (????-??-??): + * Noteworthy changes in release ?.? (????-??-??) [?] Push these changes. - ----- -Copyright (C) 2002-2005, 2007-2012 Free Software Foundation, Inc. +Copyright (C) 2002-2005, 2007-2013 Free Software Foundation, Inc. This file is part of GNU Bison. @@ -406,3 +456,14 @@ GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . + + LocalWords: Automake Autoconf Gettext Gzip Rsync Valgrind gnulib submodules + LocalWords: submodule init cd distcheck checkin ChangeLog valgrind sigreturn + LocalWords: UC gcc DGNULIB POSIXCHECK xml XSLT glr lalr README po runtime rc + LocalWords: gnupload gnupg gpg keyserver BDF ncftp filename clearsign cvs dir + LocalWords: symlinks vti html lt POSIX Cc'ed + +Local Variables: +mode: outline +fill-column: 76 +End: