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At least 'sort' on openSUSE/Fedora have a bug in the case-folding code
of their I18N downstream patch which leads to wrong sort results,
e.g. "Dániel" coming after "Dylan".
* Makefile.am (THANKS): Sort the final contributor list using our
own sort implementation - as others may result in a different order;
add a FIXME comment to remove this again once common platforms have
a functional 'sort -f'. Add '-k1,1' for a better sort order.
While at it, save a grep and perl call to prepare the list from
'THANKS.in' by doing all in the first perl call.
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Run "make update-copyright" and then...
* tests/sample-test: Adjust to use the single most recent year.
* tests/du/bind-mount-dir-cycle-v2.sh: Fix case in copyright message,
so that year is updated automatically in future.
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Add the --enable-single-binary option to the configure file.
When enabled, this option builds a single binary file containing
the selected tools. Which tool gets executed depends on the value
of argv[0] which can be set implicitly through symlinks to the
single program.
This setup reduces significantly the size of a complete coreutils
install, since code from lib/libcoreutils.a is not duplicated in
every one of the more than 100 binaries. Runtime overhead is
increased due to more dynamic libraries being loaded, and extra
initialization being performed for all utils. Also initially
a larger binary is loaded from storage, though this is usually
alleviated due to caching and lazy mmaping of unused blocks,
and in fact the single binary should have better caching
characteristics.
Comparing the size of the individual versus single binary on x86_64:
$ cd src
$ size coreutils
$ size -t $(../build-aux/gen-lists-of-programs.sh --list-progs |
grep -Ev '(coreutils|libstdbuf)') | tail -n1
text data bss dec hex filename
1097416 5388 88432 1191236 122d44 src/coreutils
4901010 124964 163768 5189742 4f306e (TOTALS)
Storage requirements are reduced similarly:
$ cd src
$ du -h coreutils
$ du -ch $(../build-aux/gen-lists-of-programs.sh --list-progs |
grep -Ev '(coreutils|libstdbuf)') | tail -n1
1.2M coreutils
5.3M total
When installing, the makefile will create either symlinks or
shebangs based on the --enable-single-binary setting, for
each configured tool. In this way, all the tools are still
callable individually, but they are all implemented by the same
"coreutils" binary installed on the same directory.
* .gitignore: Add new generated files.
* Makefile.am: New rules to generate build-aux/gen-single-binary.sh
and install symlinks.
* NEWS: Mention the new feature.
* README: Add "coreutils" to the list of utils.
* bootstrap.conf: Regenerate src/single-binary.mk
* build-aux/gen-lists-of-programs.sh: New --list-progs option.
* build-aux/gen-single-binary.sh: Regenerate
* configure.ac: New --enable-single-binary option and other variables.
Disallow --enable-single-binary=symlinks with --program-prefix et. al.
* man/coreutils.x: Manpage hook.
* man/local.mk: Add manpage hook and fix dependencies.
* src/coreutils.c: Multicall implementation.
* src/local.mk: New rules for the single binary option.
* tests/local.mk: Add $single_binary_progs to support
require_built_() from init.cfg
* tests/misc/env.sh: Avoid the use of symlink to echo.
* tests/misc/help-version.sh: Add exception for coreutils.
* tests/install/basic-1.sh: Really avoid using ginstall strip
functionality if there is an issue with the independent strip command.
* src/kill.c: Changes to call exit() in main.
* src/readlink.c: Likewise.
* src/shuf.c: Likewise.
* src/timeout.c: Likewise.
* src/truncate.c: Likewise.
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* Makefile.am (gen-ChangeLog): Clear amend_git_log when we
don't set it, so that an envvar setting cannot cause trouble.
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* Makefile.am (gen-ChangeLog): Sync changes from GNU hello,
to ensure exit status is propagated, and to support an optional
git-log-fix file.
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Run "make update-copyright", but then also run this,
perl -pi -e 's/2\d\d\d-//' tests/sample-test
to make that one script use the single most recent year number.
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Run "make update-copyright", but then also run this,
perl -pi -e 's/2\d\d\d-//' tests/sample-test
to make that one script use the single most recent year number.
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Since commit v8.19-118-g57da212, our 'dist-hook' rule tweaked the
distributed Makefile.in to make each man page 'man/foo.1' depend
on the corresponding source 'src/foo.c' rather than the corresponding
program 'src/foo'. That was done to accommodate systems without
perl, which cannot run help2man to regenerate the manpage after
its corresponding program has been built.
This seems a right and proper graceful degradation, in that the
man pages dependencies are still 100% correct in a git checkout,
while being more lax but "more portable" in a distribution tarball.
Alas, that is not the case in practice, as it turns out the tweaked
Makefile makes the building of man pages unreliable and potentially
incorrect!
In fact, assume that instead of the correct a dependency:
man/ls.1: src/ls
we have the laxer one:
man/ls.1: src/ls.c
and think of what happens if a user modifies, say, 'src/ls.c', and then
runs "make -j4" to rebuild everything. The make process will see that
it has to rebuild the man page 'man/ls.1' (because its prerequisite
'src/ls.c' has changed), but won't see that it has to rebuild 'src/ls'
*before* re-running 'help2man' to generate that man page; so, if
'man/ls.1' is rebuilt before 'src/ls' (which can happen with concurrent
make), our user will get either a build error (if 'src/ls' did non
exist) or, worse, a man page with an up-to-date timestamp but an
out-of-date content. And what's even worse in all of this is that
this problem will be present also for users who have perl installed:
this is not a "graceful degradation" at all!
In our situation, the best and simplest way to implement a graceful
degradation it to keep the correct dependencies for man pages (that
is, "man/ls.1: src/ls"), and if perl is not present, just generate
dummy man pages reporting that built-time issue and redirecting the
user back to either the info documentation or the '--help' output.
As a consequence of this change, we also stop distributing man pages,
since they will now be generated unconditionally.
* Makefile.am (do-not-require-help2man): Remove.
(dist-hook): Don't depend on it.
* man/local.mk: Remove an obsolete comment.
(EXTRA_DIST): Stop distributing generated man pages.
($(EXTRA_MANS)): This no longer needs to depend on $(all_programs).
(MAINTAINERCLEANFILES): $(ALL_MANS) Do not list it here, and ...
(CLEANFILES): ... list it here, instead.
(.x.1): Instead of warning if perl is missing, but then trying to run
'help2man' unconditionally, simply run ...
(run_help2man): ... the command referenced by this new variable, that
expands to a proper invocation of 'help2man' if perl is present, and
to an invocation of a shell script generating a dummy manpage if it
is not.
(EXTRA_DIST): Distribute that shell script.
* man/dummy-man: New shell script.
* NEWS (Build-related): Mention this.
Fixes coreutils http://bugs.gnu.org/12715.
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The README-documented way to run individual tests was invalidated
by the conversion of tests/ to non-recursive make. Add a GNUmakefile
shim to reenable that usage.
* tests/GNUmakefile: New file, so that "make -C tests ..." works
like it did before the conversion of tests/ to non-recursive build.
Reported by Bernhard Voelker.
* Makefile.am (EXTRA_DIST): Add it.
* cfg.mk (sc_prohibit_tab_based_indentation): Also exempt any
GNUmakefile from this syntax-check.
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* bootstrap.conf (gnulib_modules): Use the new module.
(bootstrap_post_import_hook): Invoke prefix-gnulib-mk.
* configure.ac (AC_CONFIG_FILES): Remove lib/Makefile.
* lib/Makefile.am: Renamed...
* lib/local.mk: ...to this.
* src/local.mk (CLEANFILES): Append, don't set.
(noinst_LIBRARIES): Likewise.
(AM_CPPFLAGS): Don't set this here.
* Makefile.am (AM_CPPFLAGS): Define here instead.
(noinst_LIBRARIES, CLEANFILES, MOSTLYCLEANDIRS, MOSTLYCLEANFILES):
Initialize here, so we can append to them from each included local.mk
(SUBDIRS): Remove "lib".
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But do retain full dependencies when building from a git clone.
We do this by converting the full dependency (of the .1 file on
the binary we run with --help) into a dependency on the .c file.
* Makefile.am (do-not-require-help2man): New rule.
(dist-hook): depend on it.
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* Makefile.am (SUBDIRS): Remove 'tests'.
(include): The '$(top_srcdir)/tests/local.mk' file.
(check-root): Remove this convenience target, it's no longer needed
now that the "real" check-root target once in 'tests/Makefile' will
land in the top-level makefile.
* configure.ac (AC_CONFIG_FILES): Remove 'tests/Makefile'.
* tests/Makefile.am: Rename ...
* tests/local.mk: ... like this, with a lot of adjustments.
* tests/init.cfg: Move ...
* init.cfg: ... here. This is necessary, for a limitation of the
gnulib-provided 'tests/init.sh', which unconditionally look for
'init.cfg' in the $(srcdir) directory.
* tests/*/*.sh: Adjust: expect init.sh to be in '$srcdir/tests',
not in '$srcdir', and extend $PATH with './src', not with '../src'.
* tests/Coreutils.pm: Adjust similarly.
* tests/pr/pr-tests.pl ($pfx): Likewise.
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It was unneeded and broken since the removal of 'su' from GNU
coreutils, in commit v8.17-16-g928dd73 of 2012-06-06, "su: remove
program (util-linux is now the best source for it)".
* Makefile.am (install-root): Remove.
(ALL_RECURSIVE_TARGETS): Update.
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This is a follow up on today's commit v8.19-60-g4f2e62b".
* Makefile.am ($(top_srcdir)/m4/cu-progs.m4,
$(srcdir)/src/cu-progs.mk): New, generate these files from the
'build-aux/gen-lists-of-programs.sh', the same way it's done
from the bootstrap script.
* bootstrap.conf (bootstrap_post_import_hook): Add comment about
the necessity to keep those new rules synced with the commands
here. Enhance those commands so to that the generated files are
set read-only.
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* Makefile.am (SUBDIRS): Remove 'src'. Ensure '.' is listed before
'tests' and 'gnulib-tests'.
(dist-hook): Adjust: we must now tweak the top-level Makefile.in
in $(distdir), not the one in the 'src/' subdir (which is gone).
(include): The '$(top_srcdir)/src/local.mk' file.
* build-aux/gen-lists-of-programs.sh: Adjust the generation of the
automake input fragment.
* tests/Makefile.am (.built-programs): Adjust.
* cfg.mk (all_programs): Remove this convenience rule; it's no
longer needed, now that we can rely directly on the contents of
$(all_programs).
(sc_option_desc_uppercase, check-programs-vs-x:): Adjust lists
of prerequisites accordingly.
(all-progs-but-lbracket): Simplify definition accordingly.
* configure.ac ($OPTIONAL_BIN_PROGS): Adjust definition.
($OPTIONAL_PKGLIB_PROGS): Likewise.
($NO_INSTALL_PROGS_DEFAULT): Tweak definition, for consistency.
(AC_CONFIG_FILES): Remove 'src/Makefile'.
* src/Makefile.am: Rename ...
* src/local.mk: ... like this, with a lot of adjustments. In
addition ...
(all_programs): ... remove this now-unneeded convenience target.
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This is in preparation of future changes. Still, this patch
leaves the build system in a better shape; true, with more
indirections, but also with less convoluted and brittle hacks.
Unfortunately, this commit also makes some rebuild rules
incomplete; that will son be fixed by follow-up patches.
* build-aux/gen-lists-of-programs.sh: New, generates autoconf
and automake input fragments that define "lists" of all coreutils
programs, with further distinctions about how and when these
programs should be built (by default; if the system is capable
enough; only if the user asks for them explicitly). This is
useful to avoid duplicating the definitions of these lists among
several files (at least 'configure.ac' 'src/Makefile.am'); such
duplication had proved a source of inconsistencies and bugs in
the past. And the pre-existing way to avoid such duplication,
as implemented in 'configure.ac' before this patch, was overly
complex and brittle.
* Makefile.am (EXTRA_DIST): Distribute the new script.
* bootstrap.conf (bootstrap_post_import_hook): Run the new script
to generate 'm4/cu-progs.m4' and 'src/cu-progs.mk'.
* .gitignore: Ignore those files.
* configure.ac: Include 'm4/cu-progs.m4', and decidedly simplify
most of the program lists definition and processing accordingly.
* src/Makefile.am: Similarly include 'src/cu-progs.mk', containing
definition of variables $(default__progs), $(no_install__progs)
and $(build_if_possible__progs). Accordingly ...
(no_install__progs, build_if_possible__progs): ... remove.
(EXTRA_DIST): Adjust definition.
Adjust a comment.
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It was useful only back when coreutils used CVS as its version
control system.
* build-aux/cvsu: Delete.
* Makefile.am (EXTRA_DIST): Remove it.
* cfg.mk: Remove the two exemptions for this removed file.
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* Makefile.am: Move definition of target 'all_programs' from here ...
* cfg.mk: ... to here, which is the only file where it is used.
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* Makefile.am: Include 'man/local.mk'.
(SUBDIRS): Remove 'man'.
* configure.ac ($MAN): Adjust so that each of its entries has a leading
'man/' component.
(AC_CONFIG_FILES): Remove 'man/Makefile'.
* man/Makefile.am: Rename ...
* man/local.mk: ... like this. With further adjustments: each 'foo.1'
target renamed like 'man/foo.1', each '../src/foo.c' dependency as
'src/foo.c', and each '$(srcdir)' usage as '$(srcdir)/man'. Also ...
(mandep): Adjust, removing the leading '../' component.
Several whitespace adjustments while at it.
(ASSORT): Remove, it's already defined in the top-level Makefile.am.
* cfg.mk (sc_option_desc_uppercase, sc_man_file_correlation): Remove
the associated recipes, they are now directly available from the
included 'man/local.mk'. Actually, the other changes in this commit
have made these recipes instable and not completely correct, but that
will be fixed in later changes.
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This will be mostly useful in future changes.
* Makefile.am (all_programs): New, simply work by delegating to
the same-named target in the 'src/' subdirectory.
* cfg.mk (sc_option_desc_uppercase): Take advantage of it.
(sc_man_file_correlation): Likewise.
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* doc/Makefile.am: Rename ...
* doc/local.mk: ... like this. With further adjustments ...
(info_TEXINFOS): Prepend 'doc/' to all '*.texi' files listed in
here.
(coreutils_TEXINFOS): Likewise, and rename ...
(doc_coreutils_TEXINFOS): ... like this.
(constants.texi): Rename ...
(doc/constants.texi): ... like this. Adjust the recipe to avoid
spurious errors.
(MAINTAINERCLEANFILES): Adjust, and extend with '+=' rather than
setting it with '='.
(ME): Delete.
(find_upper_case_var): Use '$@', not '$(ME)', in error messages.
* Makefile.am: Include 'doc/local.mk'.
(SUBDIRS): Remove 'doc'.
* configure.ac (AC_CONFIG_FILES): Remove 'doc/Makefile'.
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Run "make update-copyright".
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* doc/coreutils.texi (Formatting the file names):
coreutils now quotes 'like this'.
* man/help2man:
* src/timeout.c (usage): Quote 'like this' in diagnostics.
* HACKING, Makefile.am, NEWS, README, README-hacking, TODO, cfg.mk:
* doc/Makefile.am, doc/coreutils.texi, m4/jm-macros.m4:
* man/Makefile.am, man/help2man, src/Makefile.am, src/copy.h:
* src/extract-magic, src/ls.c, src/pinky.c, src/pr.c, src/sort.c:
* src/split.c, src/timeout.c, src/who.c, tests/dd/skip-seek-past-file:
* tests/pr/pr-tests: Quote 'like this' in commentary.
* cfg.mk (old_NEWS_hash): Update due to changed old NEWS.
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Run "make update-copyright".
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* Makefile.am (THANKS): Make generated file read-only.
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* Makefile.am (check-git-hook-script-sync): New rule -- not used
anywhere, because it depends on having very recent git.
* scripts/git-hooks/pre-applypatch: New file.
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* gnulib: Update to latest, for new gitlog-to-changelog.
* Makefile.am (gen-ChangeLog): Use its new --amend=F option.
* build-aux/git-log-fix: New file, with ChangeLog fixes.
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* Makefile.am: add shortcuts to run (very) expensive tests.
Use "make check-expensive" to run tests with RUN_EXPENSIVE_TESTS=yes,
use "make check-very-expensive" to run tests with both
RUN_EXPENSIVE_TESTS=yes and RUN_VERY_EXPENSIVE_TESTS=yes.
Non-expensive tests are included in all cases.
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* gl/modules/getloadavg.diff: Remove file. It stopped being
useful back in February.
* Makefile.am (EXTRA_DIST): Remove it.
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* Makefile.am (changelog_etc): Don't list update-copyright here.
It is automatically included via gnulib-tool-generated lib/gnulib.mk.
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Instead, use the brand new mechanism with which you merely use a
variable (derived from the rule name) defined in cfg.mk to an ERE
matching the exempted file names.
* gnulib: Update to latest, to get maint.mk that implements this.
* Makefile.am (syntax_check_exceptions): Remove variable.
(EXTRA_DIST): Remove use of the variable.
* cfg.mk (sc_x_sc_dist_check): Remove rule, no longer useful.
(exclude_file_name_regexp--sc_space_tab): Define variable.
(exclude_file_name_regexp--sc_bindtextdomain): Likewise.
(exclude_file_name_regexp--sc_unmarked_diagnostics): Likewise.
(exclude_file_name_regexp--sc_error_message_uppercase): Likewise.
(exclude_file_name_regexp--sc_trailing_blank): Likewise.
(exclude_file_name_regexp--sc_system_h_headers): Likewise.
(exclude_file_name_regexp--sc_require_config_h_first): Likewise.
(exclude_file_name_regexp--sc_require_config_h): Likewise.
(exclude_file_name_regexp--sc_po_check): Likewise.
(exclude_file_name_regexp--sc_prohibit_always-defined_macros): Likewise.
(exclude_file_name_regexp--sc_prohibit_empty_lines_at_EOF): Likewise.
(exclude_file_name_regexp--sc_program_name): Likewise.
(exclude_file_name_regexp--sc_file_system): Likewise.
(exclude_file_name_regexp--sc_prohibit_always_true_header_tests):
Likewise.
(exclude_file_name_regexp--sc_prohibit_fail_0): Likewise.
(exclude_file_name_regexp--sc_prohibit_atoi_atof): Likewise.
(exclude_file_name_regexp--sc_prohibit_tab_based_indentation): Likewise.
(exclude_file_name_regexp--sc_prohibit_stat_st_blocks): Likewise.
* configure.ac [whether localtime caches TZ]: Use return 0/1, not
exit (0/1) to avoid triggering a sc_prohibit_magic_number_exit failure.
* .x-sc_GPL_version: Remove file.
* .x-sc_bindtextdomain: Likewise.
* .x-sc_error_message_uppercase: Likewise.
* .x-sc_file_system: Likewise.
* .x-sc_obsolete_symbols: Likewise.
* .x-sc_po_check: Likewise.
* .x-sc_program_name: Likewise.
* .x-sc_prohibit_always-defined_macros: Likewise.
* .x-sc_prohibit_always_true_header_tests: Likewise.
* .x-sc_prohibit_atoi_atof: Likewise.
* .x-sc_prohibit_empty_lines_at_EOF: Likewise.
* .x-sc_prohibit_fail_0: Likewise.
* .x-sc_prohibit_magic_number_exit: Likewise.
* .x-sc_prohibit_stat_st_blocks: Likewise.
* .x-sc_prohibit_strcmp: Likewise.
* .x-sc_prohibit_tab_based_indentation: Likewise.
* .x-sc_require_config_h: Likewise.
* .x-sc_require_config_h_first: Likewise.
* .x-sc_space_tab (config): Likewise.
* .x-sc_sun_os_names: Likewise.
* .x-sc_system_h_headers: Likewise.
* .x-sc_trailing_blank: Likewise.
* .x-sc_unmarked_diagnostics: Likewise.
* .x-sc_useless_cpp_parens: Likewise.
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Run "make update-copyright".
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Before this change, we had a tendency to manually list each
contributor's name in THANKS. Now, each commit "Author" is
included in the generated THANKS file automatically, and most
of the old THANKS file is now a template, THANKS.in.
We'll still have to manually list the names of people who report
problems without a usable patch.
* THANKS.in: New file, derived from THANKS, but removing names of
those who are listed as git log 'Author:'s.
* THANKS: Remove file.
* thanks-gen: New file.
* Makefile.am (THANKS): New rule.
(EXTRA_DIST): Add .mailmap, THANKS.in and thanks-gen.
* .gitignore: Add THANKS and THANKS-to-translators.
* .mailmap: Unify on single address and name-spelling per contributor.
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Also, do the following to avoid "make syntax-check" failure
induced by new rules.
* .x-sc_bindtextdomain: Exempt files with an #ifdef'd "main".
* Makefile.am: Add this file.
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* cfg.mk (sc_prohibit_always-defined_macros): Rename from
sc_always_defined_macros.
* .x-sc_prohibit_always-defined_macros: New file, renamed from...
* .x-sc_always_defined_macros: ...removed.
* Makefile.am (syntax_check_exceptions): Rename here, too.
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* cfg.mk (gl_generated_headers_): Define.
(headers_with_interesting_macro_defs): Remove headers covered
by the above.
(.re-defmac): Extract symbol names from many more files.
(sc_always_defined_macros): Use VC_LIST_EXCEPT, not VC_LIST, so
that we can use the usual exception mechanism.
Test for $(gnulib_dir), not system.h.
* .x-sc_always_defined_macros: New file. Exempt src/seq.c.
* Makefile.am (syntax_check_exceptions): Add it here.
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* .x-sc_prohibit_always_true_header_tests: New file.
* Makefile.am (syntax_check_exceptions): Add it.
* src/cat.c: Remove #if HAVE_SYS_IOCTL_H test.
* src/copy.c: Likewise.
* src/ls.c: Likewise.
* src/stty.c: Likewise.
* src/install.c: Remove #if HAVE_SYS_WAIT_H test.
* src/kill.c: Likewise.
* src/operand2sig.c: Likewise.
* src/timeout.c: Likewise.
* src/pathchk.c: Remove #if HAVE_WCHAR_H test.
* src/stat.c: Remove #if HAVE_NETINET_IN_H test.
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* cfg.mk (detect_empty_lines_at_EOF_): Define.
(sc_prohibit_empty_lines_at_EOF): New rule.
* .x-sc_prohibit_empty_lines_at_EOF: New file. Exempt pr test inputs.
* Makefile.am (syntax_check_exceptions): Add it.
Pádraig Brady suggested to parse the output of tail -n1.
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Use this command:
git ls-files | grep -v COPYING \
| xargs env UPDATE_COPYRIGHT_USE_INTERVALS=1 \
build-aux/update-copyright
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* cfg.mk (sc_prohibit_fail_0): New rule.
* .x-sc_prohibit_fail_0: New file.
* Makefile.am (syntax_check_exceptions): Distribute the new file.
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Cope with gnulib's new sc_prohibit_magic_number_exit rule.
* .x-sc_prohibit_magic_number_exit: New file, to add exemptions.
* Makefile.am (syntax_check_exceptions): Distribute it.
* lib/euidaccess-stat.c (main): Fix culprits.
* src/chcon.c (main): Likewise.
* src/runcon.c (main): Likewise.
* src/setuidgid.c (main): Likewise.
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* Makefile.am (distcheck-hook): Make taint-distcheck here, since it's
no longer done via maint.mk.
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* Makefile.am (.version, dist-hook, gen-ChangeLog): Use $(AM_V_GEN)
and $(AM_V_at), so that automake's silent-rules option (make V=1/V=0)
now controls whether the commands are printed at build time.
(THANKS-to-translators, check-ls-dircolors): Likewise.
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* cfg.mk (sc_prohibit_tab_based_indentation): New rule.
* .x-sc_prohibit_tab_based_indentation: New file.
* Makefile.am (syntax_check_exceptions): Add file,
.x-sc_prohibit_tab_based_indentation.
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* gnulib: Update submodule to get latest maint.mk.
* Makefile.am (update-copyright): Remove rule; now it's in maint.mk.
* m4/check-decl.m4: Update sole remaining copyright year list.
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* Makefile.am (update-copyright): Relax the selection rule
to match any file containing the word "Copyright".
Correct the exclusion rule so that it also excludes ChangeLog
and COPYING files that are not in the top level directory.
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* build-aux/update-copyright: New file.
* Makefile.am (changelog_etc): Add update-copyright.
(update-copyright): New rule.
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* AUTHORS: Register as the author.
* NEWS: Mention this change.
* README: Add stdbuf command to list.
* configure.ac: Only enable on ELF systems with GCC.
* cfg.mk (sc_system_h_headers): Use VC_LIST_EXCEPT rather than
VC_LIST, so we can add an exception, if needed.
* .x-sc_system_h_headers: New file. Exempt libstdbuf.c.
* Makefile.am (syntax_check_exceptions): Add .x-sc_system_h_headers.
* doc/coreutils.texi (stdbuf invocation): Add stdbuf info.
* man/.gitignore: Ignore generated manpage.
* src/.gitignore: Ignore stdbuf and libstdbuf.so binaries.
* man/Makefile.am (stdbuf.1): Add dependency.
* man/stdbuf.x: New file with example usage.
* po/POTFILES.in: Reference new command and shared library sources.
* src/Makefile.am (build_if_possible__progs): Add stdbuf and libstdbuf,
(pkglib_PROGRAMS): Reference optional shared lib,
(libstdbuf_so_LDADD): Ensure we don't link with non PIC libcoreutils.a.
(libstdbuf_so_LDFLAGS): Add -shared GCC option,
(libstdbuf_so_CFLAGS): Add -fPIC GCC option.
(check-README): Exclude libstbuf.
(check-AUTHORS): ditto.
(sc_tight_scope): Exclude functions starting with __.
* src/libstdbuf.c: The LD_PRELOAD shared library to control buffering.
* src/stdbuf.c: New file to setup env variables before execing command.
* tests/Makefile.am: Reference new test file.
* tests/misc/help-version: Set expected exit codes.
* tests/misc/invalid-opt: ditto.
* tests/misc/stdbuf: Add 9 tests.
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* Makefile.am: Add a couple of missing entries to
syntax_check_exceptions for distribution.
* cfg.mk: Add a rule to ensure the syntax_check_exceptions list
stays in sync with the .x-sc_* files in the repository.
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* dist-check.mk: New file: coreutils-specific rules extracted
from maint.mk, now that maint.mk has migrated to gnulib.
* Makefile.am (EXTRA_DIST): Add dist-check.mk.
* coreutils/cfg.mk: Include $(srcdir)/dist-check.mk.
* gnulib: Update submodule to latest.
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