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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.
109 lines
1.3 KiB
Plaintext
109 lines
1.3 KiB
Plaintext
00gnulib.m4
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absolute-header.m4
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alloca.m4
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argmatch.m4
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assert.m4
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cloexec.m4
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config-h.m4
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dirname.m4
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dos.m4
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double-slash-root.m4
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dup2.m4
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environ.m4
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errno_h.m4
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error.m4
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exitfail.m4
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extensions.m4
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fatal-signal.m4
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fcntl-o.m4
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fcntl.m4
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fcntl_h.m4
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fopen.m4
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getdtablesize.m4
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getopt.m4
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getpagesize.m4
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gettext.m4
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gnulib-cache.m4
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gnulib-common.m4
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gnulib-comp.m4
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gnulib-tool.m4
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hash.m4
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iconv.m4
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include_next.m4
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inline.m4
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intlmacosx.m4
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inttypes-h.m4
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inttypes-pri.m4
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inttypes.m4
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javacomp.m4
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javaexec.m4
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lib-ld.m4
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lib-link.m4
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lib-prefix.m4
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localcharset.m4
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locale-fr.m4
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locale-ja.m4
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locale-zh.m4
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longlong.m4
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malloc.m4
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mbrtowc.m4
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mbsinit.m4
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mbstate_t.m4
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mbswidth.m4
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memchr.m4
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mmap-anon.m4
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mode_t.m4
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multiarch.m4
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nls.m4
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open.m4
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pipe.m4
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pipe2.m4
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po.m4
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posix_spawn.m4
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progtest.m4
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quote.m4
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quotearg.m4
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rawmemchr.m4
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sched_h.m4
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setenv.m4
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sig_atomic_t.m4
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sigaction.m4
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signal_h.m4
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signalblocking.m4
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spawn_h.m4
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stat.m4
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stdbool.m4
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stddef_h.m4
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stdint.m4
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stdint_h.m4
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stdio-safer.m4
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stdio_h.m4
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stdlib_h.m4
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stpcpy.m4
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strchrnul.m4
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strerror.m4
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string_h.m4
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strndup.m4
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strnlen.m4
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strtol.m4
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strtoul.m4
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strverscmp.m4
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sys_stat_h.m4
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sys_wait_h.m4
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threadlib.m4
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time_h.m4
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unistd-safer.m4
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unistd_h.m4
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unlocked-io.m4
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wait-process.m4
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warn-on-use.m4
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warning.m4
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warnings.m4
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wchar.m4
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wchar_t.m4
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wctype.m4
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wcwidth.m4
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wint_t.m4
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xalloc.m4
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xstrndup.m4
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