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22cc8d813e
M4's output pipe was not being drained upon fatal errors during scan_skel. As a result, broken-pipe messages from M4 were seen on at least AIX, HP-UX, Solaris, and RHEL4, and this caused a failure in the test suite. The problem was that, on platforms where the default disposition for SIGPIPE is ignore instead of terminate, M4 sometimes saw fwrite fail with errno=EPIPE and then reported it. However, there's some sort of race condition, because the new test group occasionally succeeded. Reported by Albert Chin at <http://lists.gnu.org/archive/html/bug-bison/2010-02/msg00004.html>. There were also problems with the test suite livelocking on Tru64 5.1b. Reported by Didier Godefroy at <http://lists.gnu.org/archive/html/bug-bison/2009-05/msg00005.html>. Switching to create_pipe_bidi suggested by Akim Demaille. To attempt to solve both of these problems, switch to gnulib's create_pipe_bidi and register M4 process as a slave. Along the way, clean up file name conflict handling, which was affected by the broken-pipe problem before the switch. * NEWS (2.4.2): Document. * THANKS (Didier Godefroy): Add. * bootstrap.conf (gnulib_modules): Add pipe. * gnulib: Update to latest to make sure we have all the latest fixes. * lib/Makefile.am (libbison_a_SOURCES): Remove subpipe.h and subpipe.c. * po/POTFILES.in (lib/subpipe.c): Remove. * src/files.c (compute_output_file_names): Update invocations of output_file_name_check. (output_file_name_check): In the case that the grammar file would be overwritten, use complain instead of fatal, but replace the output file name with /dev/null. Use the /dev/null solution for the case of two conflicting output files as well because it seems safer in case Bison one day tries to open both files at the same time. * src/files.h (output_file_name_check): Update prototype. * src/output.c (output_skeleton): Use create_pipe_bidi and wait_subprocess. Assert that scan_skel completely drains the pipe. * src/scan-skel.l (at_directive_perform): Update output_file_name_check invocation. * tests/output.at (AT_CHECK_CONFLICTING_OUTPUT): Check that the grammar file actually isn't overwritten. (Conflicting output files: -o foo.y): Update expected output. * tests/skeletons.at (Fatal errors but M4 continues producing output): New test group.
68 lines
2.2 KiB
Plaintext
68 lines
2.2 KiB
Plaintext
# Bootstrap configuration.
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# Copyright (C) 2006-2010 Free Software Foundation, Inc.
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# gnulib modules used by this package.
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gnulib_modules='
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announce-gen argmatch assert config-h c-strcase configmake dirname
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error extensions fopen-safer gendocs getopt-gnu gettext
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git-version-gen hash inttypes javacomp-script javaexec-script
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maintainer-makefile malloc mbswidth obstack pipe quote quotearg
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stdbool stpcpy strerror strtoul strverscmp unistd unistd-safer
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unlocked-io update-copyright unsetenv verify warnings xalloc
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xalloc-die xstrndup
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'
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# Additional xgettext options to use. Use "\\\newline" to break lines.
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XGETTEXT_OPTIONS=$XGETTEXT_OPTIONS'\\\
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--from-code=UTF-8\\\
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--flag=asprintf:2:c-format\\\
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--flag=complain:1:c-format --flag=complain_at:2:c-format\\\
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--flag=fatal:1:c-format --flag=fatal_at:2:c-format\\\
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--flag=warn:1:c-format --flag=warn_at:2:c-format\\\
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--flag=unexpected_end:2:c-format\\\
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'
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XGETTEXT_OPTIONS_RUNTIME=$XGETTEXT_OPTIONS'\\\
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--keyword=YY_ \\\
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'
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# Gettext supplies these files, but we don't need them since
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# we don't have an intl subdirectory.
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excluded_files='
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m4/codeset.m4
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m4/glibc2.m4
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m4/glibc21.m4
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m4/intdiv0.m4
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m4/intl.m4
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m4/intldir.m4
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m4/intmax.m4
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m4/inttypes_h.m4
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m4/lcmessage.m4
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m4/lock.m4
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m4/longdouble.m4
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m4/printf-posix.m4
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m4/signed.m4
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m4/size_max.m4
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m4/uintmax_t.m4
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m4/ulonglong.m4
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m4/visibility.m4
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m4/xsize.m4
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'
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# In directories like lib/, m4/, and po/, generate both these files because we
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# still try to support CVS emulation.
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vc_ignore='.cvsignore .gitignore'
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