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aba75f6d4a
It is almost always incorrect for a configure script to omit either AC_INIT or AC_OUTPUT. Issue warnings in the ‘syntax’ category for this. The implementation is, unfortunately, a bit of a kludge. To check for the _absence_ of a macro invocation, we can use m4_provide_if inside a m4_wrap hook. However, if we activate the m4_wrap hook directly from general.m4, we get spurious warnings at freeze time. We also get warnings whenever a script that’s missing AC_INIT and/or AC_OUTPUT is *traced*, which means we get double warnings from autoconf, and autoheader and aclocal complain about it too, which seems unnecessary. A clean way to deal with this would be to make the hook look for a special macro that’s defined only when autoconf (the program) is invoked without any --trace arguments. Unfortunately, autom4te doesn’t pass --define down to M4, and changing that would involve coordinating with Automake (the project), so instead I’ve gone for the kludge: a new file lib/autoconf/trailer.m4 that calls m4_wrap. This file is *not* included in autoconf.m4f, but it’s installed, and it’s added to the m4 invocation by autoconf (the program) only when not tracing. (It still uses m4_wrap, because we pass it to m4 *before* configure.ac, because otherwise we get nonsense locations for any *other* diagnostics coming out of this autoconf invocation. I don’t know why.) The additional checks in autoreconf are intended to make sure that if autoreconf skips a directory entirely, you get told why. Lots of tests in the testsuite didn’t bother with AC_OUTPUT, and somewhat fewer didn’t bother with AC_INIT; where possible I just added them. Suggested by David A. Wheeler, who submitted a patch, but I didn’t wind up using any of his code. (His implementation used an extra tracing pass, only checked for a missing AC_INIT, and invented a new command-line option to turn off this specific warning. I thought this was tidier overall, despite the kludge.) * lib/autoconf/general.m4 (_AC_FINALIZE): New macro: code to be run when generating configure, after the entire configure.ac is processed. Currently only checks that AC_INIT and AC_OUTPUT were called at some point, issuing syntax-category warnings if not. (AC_INIT, AC_OUTPUT): m4_provide self. * lib/autoconf/trailer.m4: New file that just calls m4_wrap([_AC_FINALIZE]). * lib/local.mk: Install new file. * bin/autoconf.as: Add trailer.m4 to the final invocation of autom4te, but only when not tracing. * bin/autoreconf.in (autoreconf_current_directory): Distinguish in diagnostics between “directory skipped because it doesn’t have a configure.ac or configure.in” (e.g. Cygnus configure) and “directory has a configure.ac but it doesn’t appear to be autoconf input.” * tests/*.at: Fix all tests affected by the new warnings.
198 lines
6.1 KiB
Makefile
198 lines
6.1 KiB
Makefile
# Make Autoconf-related libraries.
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# Copyright (C) 2001-2005, 2009-2017, 2020 Free Software Foundation,
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# 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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# 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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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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ETAGS_ARGS += $(ETAGS_FOR_AUTOCONF)
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TAGS_FILES = # Incrementally updated later.
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# Additional checks.
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check-local: check-forbidden-patterns
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forbidden_patterns = -e '^_*EOF' -e ' cmp '
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forbidden_patterns_files = # Incrementally updated later.
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## ---------------------------------------------------------------- ##
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## Auxiliary perl modules used by autom4te and other perl scripts. ##
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## ---------------------------------------------------------------- ##
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perllibdir = $(pkgdatadir)/Autom4te
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dist_perllib_DATA = \
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lib/Autom4te/C4che.pm \
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lib/Autom4te/ChannelDefs.pm \
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lib/Autom4te/Channels.pm \
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lib/Autom4te/Configure_ac.pm \
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lib/Autom4te/FileUtils.pm \
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lib/Autom4te/General.pm \
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lib/Autom4te/Getopt.pm \
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lib/Autom4te/Request.pm \
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lib/Autom4te/XFile.pm
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TAGS_FILES += $(dist_perllib_DATA)
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# Note: ETAGS_ARGS should have already been extended to handle perl files.
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## ------------------------------------------ ##
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## Make Autom4te default configuration file. ##
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## ------------------------------------------ ##
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nodist_pkgdata_DATA = lib/autom4te.cfg
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EXTRA_DIST += lib/autom4te.in
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# All the files below depend on Makefile so that they are rebuilt
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# when the prefix, etc. changes. Unfortunately, suffix rules
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# cannot have additional dependencies, so we have to use explicit rules.
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CLEANFILES += lib/autom4te.cfg
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lib/autom4te.cfg: $(srcdir)/lib/autom4te.in Makefile
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rm -f $@ $@-t
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$(MKDIR_P) $(@D)
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$(edit) $(srcdir)/lib/autom4te.in >$@-t
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chmod a-w $@-t
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mv -f $@-t $@
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## ----------------------------- ##
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## Make Autoconf Emacs library. ##
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## ----------------------------- ##
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dist_lisp_LISP = lib/emacs/autoconf-mode.el lib/emacs/autotest-mode.el
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# TODO: This is required to work around a limitation in older
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# Automake. Remove once we can assume Automake 1.13 or later.
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CLEANFILES += autoconf-mode.elc autotest-mode.elc
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## ----------------------- ##
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## Make Autoconf library. ##
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## ----------------------- ##
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autoconflibdir = $(pkgdatadir)/autoconf
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dist_autoconflib_DATA = \
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lib/autoconf/autoconf.m4 \
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lib/autoconf/general.m4 \
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lib/autoconf/status.m4 \
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lib/autoconf/oldnames.m4 \
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lib/autoconf/specific.m4 \
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lib/autoconf/autoheader.m4 \
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lib/autoconf/autoupdate.m4 \
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lib/autoconf/autotest.m4 \
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lib/autoconf/autoscan.m4 \
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lib/autoconf/lang.m4 \
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lib/autoconf/c.m4 \
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lib/autoconf/erlang.m4 \
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lib/autoconf/fortran.m4 \
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lib/autoconf/functions.m4 \
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lib/autoconf/go.m4 \
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lib/autoconf/headers.m4 \
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lib/autoconf/types.m4 \
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lib/autoconf/libs.m4 \
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lib/autoconf/programs.m4 \
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lib/autoconf/trailer.m4
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nodist_autoconflib_DATA = lib/autoconf/autoconf.m4f
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CLEANFILES += $(nodist_autoconflib_DATA)
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TAGS_FILES += $(dist_autoconflib_DATA)
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forbidden_patterns_files += $(dist_autoconflib_DATA)
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lib/autoconf/autoconf.m4f: $(autoconf_m4f_dependencies)
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## ------------------------ ##
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## Make Autoscan library. ##
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## ------------------------ ##
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autoscanlibdir = $(pkgdatadir)/autoscan
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EXTRA_DIST += lib/autoscan/autoscan.pre
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nodist_autoscanlib_DATA = lib/autoscan/autoscan.list
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CLEANFILES += lib/autoscan/autoscan.list
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lib/autoscan/autoscan.list: $(srcdir)/lib/autoscan/autoscan.pre
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$(MKDIR_P) $(@D)
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echo '# Automatically Generated: do not edit this file' >$@
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sed '/^[#]/!q' $(srcdir)/lib/autoscan/autoscan.pre >>$@
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( \
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sed -n '/^[^#]/p' $(srcdir)/lib/autoscan/autoscan.pre; \
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$(MY_AUTOM4TE) --cache '' -M -l autoconf-without-aclocal-m4 \
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-t'AN_OUTPUT:$$1: $$2 $$3' \
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) | LC_ALL=C sort >>$@
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lib/autoscan/autoscan.list: $(autoconf_m4f_dependencies) Makefile
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## ----------------------------------- ##
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## Make Autoconf library for M4sugar. ##
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## ----------------------------------- ##
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m4sugarlibdir = $(pkgdatadir)/m4sugar
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dist_m4sugarlib_DATA = \
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lib/m4sugar/m4sugar.m4 \
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lib/m4sugar/foreach.m4 \
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lib/m4sugar/m4sh.m4
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nodist_m4sugarlib_DATA = \
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lib/m4sugar/version.m4 \
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lib/m4sugar/m4sugar.m4f \
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lib/m4sugar/m4sh.m4f
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CLEANFILES += $(nodist_m4sugarlib_DATA)
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# The ':;' in the second line of the recipe works around a redirected
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# compound command bash exit status bug.
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lib/m4sugar/version.m4: Makefile
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$(MKDIR_P) $(@D)
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:;{ \
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echo '# This file is part of -*- Autoconf -*-.' && \
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echo '# Version of Autoconf.' && \
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echo '# Copyright (C) 1999, 2000, 2001, 2002, 2006, 2007, 2009' && \
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echo '# Free Software Foundation, Inc.' && \
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echo &&\
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echo 'm4_define([m4_PACKAGE_NAME], [$(PACKAGE_NAME)])' && \
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echo 'm4_define([m4_PACKAGE_TARNAME], [$(PACKAGE_TARNAME)])' && \
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echo 'm4_define([m4_PACKAGE_VERSION], [$(PACKAGE_VERSION)])' && \
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echo 'm4_define([m4_PACKAGE_STRING], [$(PACKAGE_STRING)])' && \
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echo 'm4_define([m4_PACKAGE_BUGREPORT], [$(PACKAGE_BUGREPORT)])' && \
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echo 'm4_define([m4_PACKAGE_URL], [$(PACKAGE_URL)])' && \
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echo 'm4_define([m4_PACKAGE_YEAR], [$(RELEASE_YEAR)])'; \
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} > $@-t
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mv $@-t $@
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TAGS_FILES += $(dist_m4sugarlib_DATA)
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forbidden_patterns_files += $(dist_m4sugarlib_DATA)
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lib/m4sugar/m4sugar.m4f: $(m4sugar_m4f_dependencies)
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lib/m4sugar/m4sh.m4f: $(m4sh_m4f_dependencies)
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## ----------------------- ##
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## Make Autotest library. ##
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## ----------------------- ##
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autotestlibdir = $(pkgdatadir)/autotest
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dist_autotestlib_DATA = \
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lib/autotest/autotest.m4 \
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lib/autotest/general.m4 \
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lib/autotest/specific.m4
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nodist_autotestlib_DATA = lib/autotest/autotest.m4f
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CLEANFILES += $(nodist_autotestlib_DATA)
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TAGS_FILES += $(dist_autotestlib_DATA)
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forbidden_patterns_files += $(dist_autotestlib_DATA)
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lib/autotest/autotest.m4f: $(autotest_m4f_dependencies)
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