--*- outline -*-
-
This file attempts to describe the rules to use when hacking Bison.
Don't put this file into the distribution.
(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
** 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 <http://www.gnu.org/software/automake/>
- Autoconf <http://www.gnu.org/software/autoconf/>
+- Automake <http://www.gnu.org/software/automake/>
- Flex <http://www.gnu.org/software/flex/>
- Gettext <http://www.gnu.org/software/gettext/>
+- Graphviz <http://www.graphviz.org>
- Gzip <http://www.gnu.org/software/gzip/>
+- Help2man <http://www.gnu.org/software/help2man/>
- Perl <http://www.cpan.org/>
- Rsync <http://samba.anu.edu.au/rsync/>
- Tar <http://www.gnu.org/software/tar/>
+- Texinfo <http://www.gnu.org/software/texinfo/>
-Valgrind <http://valgrind.org/> is also highly recommended, if
-Valgrind supports your architecture.
+Valgrind <http://valgrind.org/> 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-generated from the grammars is out of date, and to bootstrap with an
-out-of-date version of the C code, but the process is not foolproof.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.
+If you're using a GNU/Linux distribution, the easiest way to install the
+above packages depends on your system. The following shell command should
+work for Debian-based systems such as Ubuntu:
-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.
+ sudo apt-get install \
+ autoconf automake autopoint flex graphviz help2man texinfo valgrind
+
+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.
** First checkout
$ git submodule update --init
-Git submodule support is weak before versions 1.6 and later, you
-should probably upgrade Git if your version is older.
+Git submodule support is weak before versions 1.6 and later, upgrade Git if
+your version is older.
The next step is to get other files needed to build, which are
extracted from other source packages:
$ ./bootstrap
-And there you are! Just
+If it fails with missing symbols (e.g., "error: possibly undefined macro:
+AC_PROG_GNU_M4"), you are likely to have forgotten the submodule
+initialization part. Otherwise, there you are! Just
$ ./configure
$ make
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".
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
** 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:
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
occurrences of PACKAGE_COPYRIGHT_YEAR in configure.ac.
** Update NEWS, commit and tag.
-See do-release-commit-and-tag in README-release.
+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".
** make alpha, beta, or stable
See README-release.
*** Using gnupload
You need "ncftp".
-At the end "make stable" (or alpha/beta) will display the prodecure to
+At the end "make stable" (or alpha/beta) will display the procedure to
run. Just copy and paste it in your shell.
*** By hand
Push these changes.
-
-----
-Copyright (C) 2002-2005, 2007-2012 Free Software Foundation, Inc.
+Copyright (C) 2002-2005, 2007-2015 Free Software Foundation, Inc.
This file is part of GNU Bison.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ 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:
projects / bison.git / blobdiff