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authorPatrick McDermott <patrick.mcdermott@libiquity.com>2023-04-12 02:01:12 (EDT)
committer Patrick McDermott <patrick.mcdermott@libiquity.com>2023-04-12 02:01:12 (EDT)
commit2710882a528c5e68cf8a647d5b6d3f100d52a9ff (patch)
tree8cf60c06607c8e6b88527976f8494cbd698dee7b
Initial commit
-rw-r--r--.gitignore33
-rw-r--r--AUTHORS1
-rw-r--r--COPYING674
-rw-r--r--Makefile.am103
-rw-r--r--NEWS17
-rw-r--r--README16
-rwxr-xr-xautogen.sh19
-rw-r--r--configure.ac89
-rw-r--r--m4/ax_append_flag.m450
-rw-r--r--m4/ax_cflags_warn_all.m4158
-rw-r--r--m4/ax_check_compile_flag.m453
-rw-r--r--m4/ax_compiler_vendor.m4117
-rw-r--r--m4/ax_prepend_flag.m451
-rw-r--r--m4/ax_require_defined.m437
-rw-r--r--m4/gcc_version.m438
-rw-r--r--m4/gl_manywarnings.m4209
-rw-r--r--m4/gl_warnings.m4110
-rw-r--r--src/local.mk2
-rw-r--r--src/main.c5
19 files changed, 1782 insertions, 0 deletions
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..12aa9dd
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,33 @@
+# Swap and backup files
+*.s[a-w]?
+*.vim
+*~
+*.orig
+
+# Files generated by aclocal, autoconf, and automake
+/aclocal.m4
+/autom4te.cache/
+/configure
+/config.h.in
+/build-aux/*
+/ChangeLog
+/INSTALL
+Makefile.in
+
+# Files generated by configure
+/config.log
+/config.status
+Makefile
+/config.h
+/stamp-h1
+
+# Files generated by Makefile
+.deps
+.dirstamp
+*.o
+/version.c
+/opkg-opk
+/opkg-opk-*.tar*
+/opkg-opk-*/
+/MD5SUMS
+/SHA256SUMS
diff --git a/AUTHORS b/AUTHORS
new file mode 100644
index 0000000..95b566f
--- /dev/null
+++ b/AUTHORS
@@ -0,0 +1 @@
+Patrick McDermott <patrick.mcdermott@libiquity.com>
diff --git a/COPYING b/COPYING
new file mode 100644
index 0000000..f288702
--- /dev/null
+++ b/COPYING
@@ -0,0 +1,674 @@
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
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+ Everyone is permitted to copy and distribute verbatim copies
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+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU Affero General Public License into a single
+combined work, and to convey the resulting work. The terms of this
+License will continue to apply to the part which is the covered work,
+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+ 14. Revised Versions of this License.
+
+ The Free Software Foundation may publish revised and/or new versions of
+the GNU General Public License from time to time. Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+ Each version is given a distinguishing version number. If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation. If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+ If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+ Later license versions may give you additional or different
+permissions. However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+ 15. Disclaimer of Warranty.
+
+ THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+ 16. Limitation of Liability.
+
+ IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+ 17. Interpretation of Sections 15 and 16.
+
+ If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+ END OF TERMS AND CONDITIONS
+
+ How to Apply These Terms to Your New Programs
+
+ If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+ To do so, attach the following notices to the program. It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+ <one line to give the program's name and a brief idea of what it does.>
+ Copyright (C) <year> <name of author>
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+ If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+ <program> Copyright (C) <year> <name of author>
+ This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+ This is free software, and you are welcome to redistribute it
+ under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License. Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+ You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+ The GNU General Public License does not permit incorporating your program
+into proprietary programs. If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library. If this is what you want to do, use the GNU Lesser General
+Public License instead of this License. But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.
diff --git a/Makefile.am b/Makefile.am
new file mode 100644
index 0000000..9d60b35
--- /dev/null
+++ b/Makefile.am
@@ -0,0 +1,103 @@
+# Process this file with automake to produce an input makefile.
+#
+# Copyright (C) 2014, 2017, 2018 Patrick McDermott
+#
+# This file is part of opkg-opk
+#
+# opkg-opk is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# opkg-opk is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with opkg-opk If not, see <http://www.gnu.org/licenses/>.
+
+KEY = '2250 31F0 47FF E516 63ED 516F 1A45 9ECD E4D6 04BE'
+
+if IN_GIT
+PACKAGE_VERSION_GIT = $$(printf ' (%s)' \
+ "$$({ git describe --tags --dirty 2>/dev/null || \
+ printf '%s-g%s' \
+ "$$(git rev-list --count HEAD)" \
+ "$$(git describe --tags --dirty --always)"; \
+ } | sed 's|^.*/||')")
+else
+PACKAGE_VERSION_GIT =
+endif
+
+# PACKAGE_STRING is used in the test suite output and log.
+# PACKAGE_VERSION can't be overridden. Automake ignores it in the IN_GIT
+# conditional (and throws a warning), and setting it to $(PACKAGE_VERSION_GIT)
+# outside the conditional causes PACKAGE_VERSION_GIT to reference itself.
+# VERSION is not set here because it is used by:
+# * Automake's distdir macro
+# * Automake's distdir target (which checks for $(VERSION) in NEWS)
+# * Our release target
+PACKAGE_STRING = $(PACKAGE_NAME) $(PACKAGE_VERSION)$(PACKAGE_VERSION_GIT)
+
+bin_PROGRAMS = opkg-opk
+
+opkg_opk_SOURCES =
+opkg_opk_CFLAGS = \
+ $(WARN_CFLAGS) \
+ $(ASAN_CFLAGS)
+opkg_opk_CPPFLAGS =
+opkg_opk_LDADD = \
+ $(ASAN_CFLAGS)
+opkg_opk_LINK = $(LINK) version.c
+EXTRA_opkg_opk_DEPENDENCIES = version.c
+CLEANFILES = version.c
+CONFIG_CLEAN_FILES =
+EXTRA_DIST = build-aux/config.rpath autogen.sh
+
+version.c: $(opkg_opk_OBJECTS) $(opkg_opk_DEPENDENCIES)
+ $(AM_V_GEN)printf 'const char *PACKAGE_VERSION_GIT = "%s";\n' \
+ "$(PACKAGE_VERSION_GIT)" >version.c
+
+really-clean: distclean
+ rm -Rf $(srcdir)/aclocal.m4 $(srcdir)/autom4te.cache/ \
+ $(srcdir)/configure \
+ $(srcdir)/config.h.in \
+ $(srcdir)/build-aux/ $(srcdir)/INSTALL $(srcdir)/Makefile.in \
+ $(srcdir)/ChangeLog
+
+dist-hook:
+if IN_GIT
+ printf 'Generated file. Do not edit.\n\n' 1>'$(distdir)/ChangeLog~'
+ GIT_DIR='$(srcdir)/.git' git log --stat --color=never \
+ 1>>'$(distdir)/ChangeLog~'
+ mv '$(distdir)/ChangeLog~' '$(distdir)/ChangeLog'
+endif
+
+release:
+ sed "s/^Released: ????-??-??\$$/Released: $$(date '+%Y-%m-%d')/" \
+ '$(srcdir)/NEWS' >'$(srcdir)/NEWS~'
+ mv '$(srcdir)/NEWS~' '$(srcdir)/NEWS'
+ $(MAKE) distcheck
+ set -e; \
+ export GIT_DIR='$(srcdir)/.git'; \
+ export GIT_WORK_TREE='$(srcdir)'; \
+ git commit -m 'NEWS: Release $(PACKAGE) $(VERSION)' -- NEWS; \
+ git tag '$(PACKAGE)/$(VERSION)' HEAD; \
+ git push --tags origin master:master
+ md5sum $(DIST_ARCHIVES) >MD5SUMS
+ sha256sum $(DIST_ARCHIVES) >SHA256SUMS
+ set -e; \
+ sigs=''; \
+ for f in $(DIST_ARCHIVES); do \
+ gpg --local-user $(KEY) --armor --detach-sign $${f}; \
+ sigs="$${sigs} $${f}.asc"; \
+ done; \
+ ssh files@files.proteanos.com mkdir -p files/pub/$(PACKAGE); \
+ rsync -az --progress --stats $(DIST_ARCHIVES) $${sigs} \
+ MD5SUMS SHA256SUMS \
+ files@files.proteanos.com:files/pub/$(PACKAGE)/$(VERSION)/
+ '$(srcdir)/scripts/announce-release.sh' \
+ $(PACKAGE) $(VERSION) '$(PACKAGE_NAME)'
+
+include $(top_srcdir)/src/local.mk
diff --git a/NEWS b/NEWS
new file mode 100644
index 0000000..9d04f3d
--- /dev/null
+++ b/NEWS
@@ -0,0 +1,17 @@
+opkg-opk version 0.1.0
+----------------------
+
+Released: ????-??-??
+
+This is the initial release of opkg-opk, in development since
+2023-04-12.
+
+Copyright Information
+---------------------
+
+Copyright (C) 2023 Patrick McDermott
+
+Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved. This file is offered as-is,
+without any warranty.
diff --git a/README b/README
new file mode 100644
index 0000000..cbcddf2
--- /dev/null
+++ b/README
@@ -0,0 +1,16 @@
+opkg-opk
+--------
+
+opkg-opk provides information about packages built by opkbuild for opkg.
+It is similar to Debian's dpkg-deb, however it provides only control
+file printing and data file listing.
+
+Copyright
+---------
+
+Copyright (C) 2023 Patrick McDermott
+
+Copying and distribution of this file, with or without modification,
+are permitted in any medium without royalty provided the copyright
+notice and this notice are preserved. This file is offered as-is,
+without any warranty.
diff --git a/autogen.sh b/autogen.sh
new file mode 100755
index 0000000..030bc06
--- /dev/null
+++ b/autogen.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+
+set -e
+
+srcdir="${0%/*}"
+
+{(
+ cd "${srcdir}"
+ [ -d build-aux ] || mkdir build-aux
+ cat >ChangeLog <<-EOF
+This file is generated upon release. Run \`git log\` for a list of changes.
+EOF
+ aclocal
+ autoconf
+ autoheader
+ automake --add-missing --copy
+)}
+
+"${srcdir}/configure" "${@}"
diff --git a/configure.ac b/configure.ac
new file mode 100644
index 0000000..800849c
--- /dev/null
+++ b/configure.ac
@@ -0,0 +1,89 @@
+# Process this file with autoconf to produce a configure script.
+#
+# Copyright (C) 2017 Patrick McDermott
+#
+# This file is part of opkg-opk.
+#
+# opkg-opk is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# opkg-opk is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with opkg-opk. If not, see <http://www.gnu.org/licenses/>.
+
+AC_INIT([opkg-opk], [1.0.0], [mailto:pj@pehjota.net], [opkg-opk])
+AC_CONFIG_AUX_DIR([build-aux])
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_SRCDIR([src/main.c])
+
+AM_INIT_AUTOMAKE([gnu check-news dist-bzip2 dist-xz subdir-objects])
+AM_SILENT_RULES([yes])
+
+AM_CONDITIONAL([IN_GIT],
+ [test -d "${srcdir}/.git" && command -v git >/dev/null 2>&1])
+
+save_CFLAGS="${CFLAGS-}"
+AC_PROG_CC()
+AM_PROG_CC_C_O()
+test -d "${srcdir}/.git" || CFLAGS="${save_CFLAGS}"
+
+AX_CFLAGS_WARN_ALL() dnl Adds -Wall or equivalent
+AX_CHECK_COMPILE_FLAG([-Wpedantic], [AX_APPEND_FLAG([-Wpedantic])])
+AX_CHECK_COMPILE_FLAG([-Wextra], [AX_APPEND_FLAG([-Wextra])])
+
+AC_ARG_ENABLE([gcc-warnings],
+ [AS_HELP_STRING([--enable-gcc-warnings], [turn on many GCC warnings])],
+ [case "${enableval}" in yes|no) gcc_warnings=${enableval};;
+ *) AC_MSG_ERROR(
+ [bad value ${enableval} for gcc-warnings option]);;
+ esac],
+ [
+ gcc_warnings=no
+ test -d "${srcdir}/.git" && gcc_warnings=yes
+ ]
+)
+if test "x${gcc_warnings}" = 'xyes'; then
+ nowarns=''
+ nowarns="${nowarns} -Wsystem-headers"
+ gl_MANYWARN_ALL_GCC([warns])
+ gl_MANYWARN_COMPLEMENT([warns], [${warns}], [${nowarns}])
+ for warn in ${warns}; do
+ gl_WARN_ADD([${warn}])
+ done
+ AC_SUBST([WARN_CFLAGS])
+fi
+
+AX_CHECK_COMPILE_FLAG([-fdiagnostics-color=auto],
+ [AX_APPEND_FLAG([-fdiagnostics-color=auto])])
+
+AC_ARG_ENABLE([address-sanitization],
+ [AS_HELP_STRING([--enable-address-sanitization],
+ [turn on AddressSanitizer (if available)])],
+ [case "${enableval}" in yes|no) address_sanitization=${enableval};;
+ *) AC_MSG_ERROR(
+ [bad value ${enableval} for address-sanitization option]
+ );;
+ esac],
+ [
+ address_sanitization=no
+ gl_GCC_VERSION_IFELSE([4], [8],
+ [test -d "${srcdir}/.git" && address_sanitization=yes])
+ ]
+)
+if test "x${address_sanitization}" = 'xyes'; then
+ AX_CHECK_COMPILE_FLAG([-fsanitize=address],
+ [AX_APPEND_FLAG([-fsanitize=address], [ASAN_CFLAGS])])
+ AX_CHECK_COMPILE_FLAG([-fno-omit-frame-pointer],
+ [AX_APPEND_FLAG([-fno-omit-frame-pointer], [ASAN_CFLAGS])])
+ AC_SUBST([ASAN_CFLAGS])
+fi
+
+AC_CONFIG_FILES([Makefile])
+AC_CONFIG_HEADERS([config.h])
+AC_OUTPUT()
diff --git a/m4/ax_append_flag.m4 b/m4/ax_append_flag.m4
new file mode 100644
index 0000000..dd6d8b6
--- /dev/null
+++ b/m4/ax_append_flag.m4
@@ -0,0 +1,50 @@
+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_append_flag.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_APPEND_FLAG(FLAG, [FLAGS-VARIABLE])
+#
+# DESCRIPTION
+#
+# FLAG is appended to the FLAGS-VARIABLE shell variable, with a space
+# added in between.
+#
+# If FLAGS-VARIABLE is not specified, the current language's flags (e.g.
+# CFLAGS) is used. FLAGS-VARIABLE is not changed if it already contains
+# FLAG. If FLAGS-VARIABLE is unset in the shell, it is set to exactly
+# FLAG.
+#
+# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION.
+#
+# LICENSE
+#
+# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
+#
+# Copying and distribution of this file, with or without modification, are
+# permitted in any medium without royalty provided the copyright notice
+# and this notice are preserved. This file is offered as-is, without any
+# warranty.
+
+#serial 8
+
+AC_DEFUN([AX_APPEND_FLAG],
+[dnl
+AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_SET_IF
+AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])])
+AS_VAR_SET_IF(FLAGS,[
+ AS_CASE([" AS_VAR_GET(FLAGS) "],
+ [*" $1 "*], [AC_RUN_LOG([: FLAGS already contains $1])],
+ [
+ AS_VAR_APPEND(FLAGS,[" $1"])
+ AC_RUN_LOG([: FLAGS="$FLAGS"])
+ ])
+ ],
+ [
+ AS_VAR_SET(FLAGS,[$1])
+ AC_RUN_LOG([: FLAGS="$FLAGS"])
+ ])
+AS_VAR_POPDEF([FLAGS])dnl
+])dnl AX_APPEND_FLAG
diff --git a/m4/ax_cflags_warn_all.m4 b/m4/ax_cflags_warn_all.m4
new file mode 100644
index 0000000..9235a18
--- /dev/null
+++ b/m4/ax_cflags_warn_all.m4
@@ -0,0 +1,158 @@
+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_cflags_warn_all.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_CFLAGS_WARN_ALL [(shellvar[, default[, action-if-found[, action-if-not-found]]])]
+# AX_CXXFLAGS_WARN_ALL [(shellvar[, default[, action-if-found[, action-if-not-found]]])]
+# AX_FCFLAGS_WARN_ALL [(shellvar[, default[, action-if-found[, action-if-not-found]]])]
+#
+# DESCRIPTION
+#
+# Specify compiler options that enable most reasonable warnings. For the
+# GNU Compiler Collection (GCC), for example, it will be "-Wall". The
+# result is added to shellvar, one of CFLAGS, CXXFLAGS or FCFLAGS if the
+# first parameter is not specified.
+#
+# Each of these macros accepts the following optional arguments:
+#
+# - $1 - shellvar
+# shell variable to use (CFLAGS, CXXFLAGS or FCFLAGS if not
+# specified, depending on macro)
+#
+# - $2 - default
+# value to use for flags if compiler vendor cannot be determined (by
+# default, "")
+#
+# - $3 - action-if-found
+# action to take if the compiler vendor has been successfully
+# determined (by default, add the appropriate compiler flags to
+# shellvar)
+#
+# - $4 - action-if-not-found
+# action to take if the compiler vendor has not been determined or
+# is unknown (by default, add the default flags, or "" if not
+# specified, to shellvar)
+#
+# These macros use AX_COMPILER_VENDOR to determine which flags should be
+# returned for a given compiler. Not all compilers currently have flags
+# defined for them; patches are welcome. If need be, compiler flags may
+# be made language-dependent: use a construct like the following:
+#
+# [vendor_name], [m4_if(_AC_LANG_PREFIX,[C], VAR="--relevant-c-flags",dnl
+# m4_if(_AC_LANG_PREFIX,[CXX], VAR="--relevant-c++-flags",dnl
+# m4_if(_AC_LANG_PREFIX,[FC], VAR="--relevant-fortran-flags",dnl
+# VAR="$2"; FOUND="no")))],
+#
+# Note: These macros also depend on AX_PREPEND_FLAG.
+#
+# LICENSE
+#
+# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+# Copyright (c) 2010 Rhys Ulerich <rhys.ulerich@gmail.com>
+# Copyright (c) 2018 John Zaitseff <J.Zaitseff@zap.org.au>
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation; either version 3 of the License, or (at your
+# option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+# Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception, the respective Autoconf Macro's copyright owner
+# gives unlimited permission to copy, distribute and modify the configure
+# scripts that are the output of Autoconf when processing the Macro. You
+# need not follow the terms of the GNU General Public License when using
+# or distributing such scripts, even though portions of the text of the
+# Macro appear in them. The GNU General Public License (GPL) does govern
+# all other use of the material that constitutes the Autoconf Macro.
+#
+# This special exception to the GPL applies to versions of the Autoconf
+# Macro released by the Autoconf Archive. When you make and distribute a
+# modified version of the Autoconf Macro, you may extend this special
+# exception to the GPL to apply to your modified version as well.
+
+#serial 25
+
+AC_DEFUN([AX_FLAGS_WARN_ALL], [
+ AX_REQUIRE_DEFINED([AX_PREPEND_FLAG])dnl
+ AC_REQUIRE([AX_COMPILER_VENDOR])dnl
+
+ AS_VAR_PUSHDEF([FLAGS], [m4_default($1,_AC_LANG_PREFIX[]FLAGS)])dnl
+ AS_VAR_PUSHDEF([VAR], [ac_cv_[]_AC_LANG_ABBREV[]flags_warn_all])dnl
+ AS_VAR_PUSHDEF([FOUND], [ac_save_[]_AC_LANG_ABBREV[]flags_warn_all_found])dnl
+
+ AC_CACHE_CHECK([FLAGS for most reasonable warnings], VAR, [
+ VAR=""
+ FOUND="yes"
+ dnl Cases are listed in the order found in ax_compiler_vendor.m4
+ AS_CASE("$ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor",
+ [intel], [VAR="-w2"],
+ [ibm], [VAR="-qsrcmsg -qinfo=all:noppt:noppc:noobs:nocnd"],
+ [pathscale], [],
+ [clang], [VAR="-Wall"],
+ [cray], [VAR="-h msglevel 2"],
+ [fujitsu], [],
+ [sdcc], [],
+ [sx], [VAR="-pvctl[,]fullmsg"],
+ [portland], [],
+ [gnu], [VAR="-Wall"],
+ [sun], [VAR="-v"],
+ [hp], [VAR="+w1"],
+ [dec], [VAR="-verbose -w0 -warnprotos"],
+ [borland], [],
+ [comeau], [],
+ [kai], [],
+ [lcc], [],
+ [sgi], [VAR="-fullwarn"],
+ [microsoft], [],
+ [metrowerks], [],
+ [watcom], [],
+ [tcc], [],
+ [unknown], [
+ VAR="$2"
+ FOUND="no"
+ ],
+ [
+ AC_MSG_WARN([Unknown compiler vendor returned by [AX_COMPILER_VENDOR]])
+ VAR="$2"
+ FOUND="no"
+ ]
+ )
+
+ AS_IF([test "x$FOUND" = "xyes"], [dnl
+ m4_default($3, [AS_IF([test "x$VAR" != "x"], [AX_PREPEND_FLAG([$VAR], [FLAGS])])])
+ ], [dnl
+ m4_default($4, [m4_ifval($2, [AX_PREPEND_FLAG([$VAR], [FLAGS])], [true])])
+ ])dnl
+ ])dnl
+
+ AS_VAR_POPDEF([FOUND])dnl
+ AS_VAR_POPDEF([VAR])dnl
+ AS_VAR_POPDEF([FLAGS])dnl
+])dnl AX_FLAGS_WARN_ALL
+
+AC_DEFUN([AX_CFLAGS_WARN_ALL], [dnl
+ AC_LANG_PUSH([C])
+ AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4])
+ AC_LANG_POP([C])
+])dnl
+
+AC_DEFUN([AX_CXXFLAGS_WARN_ALL], [dnl
+ AC_LANG_PUSH([C++])
+ AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4])
+ AC_LANG_POP([C++])
+])dnl
+
+AC_DEFUN([AX_FCFLAGS_WARN_ALL], [dnl
+ AC_LANG_PUSH([Fortran])
+ AX_FLAGS_WARN_ALL([$1], [$2], [$3], [$4])
+ AC_LANG_POP([Fortran])
+])dnl
diff --git a/m4/ax_check_compile_flag.m4 b/m4/ax_check_compile_flag.m4
new file mode 100644
index 0000000..bd753b3
--- /dev/null
+++ b/m4/ax_check_compile_flag.m4
@@ -0,0 +1,53 @@
+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
+#
+# DESCRIPTION
+#
+# Check whether the given FLAG works with the current language's compiler
+# or gives an error. (Warnings, however, are ignored)
+#
+# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
+# success/failure.
+#
+# If EXTRA-FLAGS is defined, it is added to the current language's default
+# flags (e.g. CFLAGS) when the check is done. The check is thus made with
+# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to
+# force the compiler to issue an error when a bad flag is given.
+#
+# INPUT gives an alternative input source to AC_COMPILE_IFELSE.
+#
+# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
+# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
+#
+# LICENSE
+#
+# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
+#
+# Copying and distribution of this file, with or without modification, are
+# permitted in any medium without royalty provided the copyright notice
+# and this notice are preserved. This file is offered as-is, without any
+# warranty.
+
+#serial 6
+
+AC_DEFUN([AX_CHECK_COMPILE_FLAG],
+[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
+AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
+AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
+ ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
+ _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
+ AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
+ [AS_VAR_SET(CACHEVAR,[yes])],
+ [AS_VAR_SET(CACHEVAR,[no])])
+ _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
+AS_VAR_IF(CACHEVAR,yes,
+ [m4_default([$2], :)],
+ [m4_default([$3], :)])
+AS_VAR_POPDEF([CACHEVAR])dnl
+])dnl AX_CHECK_COMPILE_FLAGS
diff --git a/m4/ax_compiler_vendor.m4 b/m4/ax_compiler_vendor.m4
new file mode 100644
index 0000000..f06e865
--- /dev/null
+++ b/m4/ax_compiler_vendor.m4
@@ -0,0 +1,117 @@
+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_compiler_vendor.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_COMPILER_VENDOR
+#
+# DESCRIPTION
+#
+# Determine the vendor of the C, C++ or Fortran compiler. The vendor is
+# returned in the cache variable $ax_cv_c_compiler_vendor for C,
+# $ax_cv_cxx_compiler_vendor for C++ or $ax_cv_fc_compiler_vendor for
+# (modern) Fortran. The value is one of "intel", "ibm", "pathscale",
+# "clang" (LLVM), "cray", "fujitsu", "sdcc", "sx", "portland" (PGI), "gnu"
+# (GCC), "sun" (Oracle Developer Studio), "hp", "dec", "borland",
+# "comeau", "kai", "lcc", "sgi", "microsoft", "metrowerks", "watcom",
+# "tcc" (Tiny CC) or "unknown" (if the compiler cannot be determined).
+#
+# To check for a Fortran compiler, you must first call AC_FC_PP_SRCEXT
+# with an appropriate preprocessor-enabled extension. For example:
+#
+# AC_LANG_PUSH([Fortran])
+# AC_PROG_FC
+# AC_FC_PP_SRCEXT([F])
+# AX_COMPILER_VENDOR
+# AC_LANG_POP([Fortran])
+#
+# LICENSE
+#
+# Copyright (c) 2008 Steven G. Johnson <stevenj@alum.mit.edu>
+# Copyright (c) 2008 Matteo Frigo
+# Copyright (c) 2018-19 John Zaitseff <J.Zaitseff@zap.org.au>
+#
+# This program is free software: you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the
+# Free Software Foundation, either version 3 of the License, or (at your
+# option) any later version.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+# Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program. If not, see <https://www.gnu.org/licenses/>.
+#
+# As a special exception, the respective Autoconf Macro's copyright owner
+# gives unlimited permission to copy, distribute and modify the configure
+# scripts that are the output of Autoconf when processing the Macro. You
+# need not follow the terms of the GNU General Public License when using
+# or distributing such scripts, even though portions of the text of the
+# Macro appear in them. The GNU General Public License (GPL) does govern
+# all other use of the material that constitutes the Autoconf Macro.
+#
+# This special exception to the GPL applies to versions of the Autoconf
+# Macro released by the Autoconf Archive. When you make and distribute a
+# modified version of the Autoconf Macro, you may extend this special
+# exception to the GPL to apply to your modified version as well.
+
+#serial 30
+
+AC_DEFUN([AX_COMPILER_VENDOR], [dnl
+ AC_CACHE_CHECK([for _AC_LANG compiler vendor], ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor, [dnl
+ dnl If you modify this list of vendors, please add similar support
+ dnl to ax_compiler_version.m4 if at all possible.
+ dnl
+ dnl Note: Do NOT check for GCC first since some other compilers
+ dnl define __GNUC__ to remain compatible with it. Compilers that
+ dnl are very slow to start (such as Intel) are listed first.
+
+ vendors="
+ intel: __ICC,__ECC,__INTEL_COMPILER
+ ibm: __xlc__,__xlC__,__IBMC__,__IBMCPP__,__ibmxl__
+ pathscale: __PATHCC__,__PATHSCALE__
+ clang: __clang__
+ cray: _CRAYC
+ fujitsu: __FUJITSU
+ sdcc: SDCC,__SDCC
+ sx: _SX
+ portland: __PGI
+ gnu: __GNUC__
+ sun: __SUNPRO_C,__SUNPRO_CC,__SUNPRO_F90,__SUNPRO_F95
+ hp: __HP_cc,__HP_aCC
+ dec: __DECC,__DECCXX,__DECC_VER,__DECCXX_VER
+ borland: __BORLANDC__,__CODEGEARC__,__TURBOC__
+ comeau: __COMO__
+ kai: __KCC
+ lcc: __LCC__
+ sgi: __sgi,sgi
+ microsoft: _MSC_VER
+ metrowerks: __MWERKS__
+ watcom: __WATCOMC__
+ tcc: __TINYC__
+ unknown: UNKNOWN
+ "
+ for ventest in $vendors; do
+ case $ventest in
+ *:)
+ vendor=$ventest
+ continue
+ ;;
+ *)
+ vencpp="defined("`echo $ventest | sed 's/,/) || defined(/g'`")"
+ ;;
+ esac
+
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [[
+#if !($vencpp)
+ thisisanerror;
+#endif
+ ]])], [break])
+ done
+
+ ax_cv_[]_AC_LANG_ABBREV[]_compiler_vendor=`echo $vendor | cut -d: -f1`
+ ])
+])dnl
diff --git a/m4/ax_prepend_flag.m4 b/m4/ax_prepend_flag.m4
new file mode 100644
index 0000000..adac8c5
--- /dev/null
+++ b/m4/ax_prepend_flag.m4
@@ -0,0 +1,51 @@
+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_prepend_flag.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_PREPEND_FLAG(FLAG, [FLAGS-VARIABLE])
+#
+# DESCRIPTION
+#
+# FLAG is added to the front of the FLAGS-VARIABLE shell variable, with a
+# space added in between.
+#
+# If FLAGS-VARIABLE is not specified, the current language's flags (e.g.
+# CFLAGS) is used. FLAGS-VARIABLE is not changed if it already contains
+# FLAG. If FLAGS-VARIABLE is unset in the shell, it is set to exactly
+# FLAG.
+#
+# NOTE: Implementation based on AX_APPEND_FLAG.
+#
+# LICENSE
+#
+# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
+# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
+# Copyright (c) 2018 John Zaitseff <J.Zaitseff@zap.org.au>
+#
+# Copying and distribution of this file, with or without modification, are
+# permitted in any medium without royalty provided the copyright notice
+# and this notice are preserved. This file is offered as-is, without any
+# warranty.
+
+#serial 2
+
+AC_DEFUN([AX_PREPEND_FLAG],
+[dnl
+AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_SET_IF
+AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])])
+AS_VAR_SET_IF(FLAGS,[
+ AS_CASE([" AS_VAR_GET(FLAGS) "],
+ [*" $1 "*], [AC_RUN_LOG([: FLAGS already contains $1])],
+ [
+ FLAGS="$1 $FLAGS"
+ AC_RUN_LOG([: FLAGS="$FLAGS"])
+ ])
+ ],
+ [
+ AS_VAR_SET(FLAGS,[$1])
+ AC_RUN_LOG([: FLAGS="$FLAGS"])
+ ])
+AS_VAR_POPDEF([FLAGS])dnl
+])dnl AX_PREPEND_FLAG
diff --git a/m4/ax_require_defined.m4 b/m4/ax_require_defined.m4
new file mode 100644
index 0000000..17c3eab
--- /dev/null
+++ b/m4/ax_require_defined.m4
@@ -0,0 +1,37 @@
+# ===========================================================================
+# https://www.gnu.org/software/autoconf-archive/ax_require_defined.html
+# ===========================================================================
+#
+# SYNOPSIS
+#
+# AX_REQUIRE_DEFINED(MACRO)
+#
+# DESCRIPTION
+#
+# AX_REQUIRE_DEFINED is a simple helper for making sure other macros have
+# been defined and thus are available for use. This avoids random issues
+# where a macro isn't expanded. Instead the configure script emits a
+# non-fatal:
+#
+# ./configure: line 1673: AX_CFLAGS_WARN_ALL: command not found
+#
+# It's like AC_REQUIRE except it doesn't expand the required macro.
+#
+# Here's an example:
+#
+# AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG])
+#
+# LICENSE
+#
+# Copyright (c) 2014 Mike Frysinger <vapier@gentoo.org>
+#
+# Copying and distribution of this file, with or without modification, are
+# permitted in any medium without royalty provided the copyright notice
+# and this notice are preserved. This file is offered as-is, without any
+# warranty.
+
+#serial 2
+
+AC_DEFUN([AX_REQUIRE_DEFINED], [dnl
+ m4_ifndef([$1], [m4_fatal([macro ]$1[ is not defined; is a m4 file missing?])])
+])dnl AX_REQUIRE_DEFINED
diff --git a/m4/gcc_version.m4 b/m4/gcc_version.m4
new file mode 100644
index 0000000..9e16450
--- /dev/null
+++ b/m4/gcc_version.m4
@@ -0,0 +1,38 @@
+dnl Copied from GNU Coreutils configure.ac
+dnl
+dnl The 17 lines are probably too trivial to be copyrightable, but just in case:
+dnl
+dnl Copyright (C) 1991-2017 Free Software Foundation, Inc.
+dnl
+dnl This program is free software: you can redistribute it and/or modify
+dnl it under the terms of the GNU General Public License as published by
+dnl the Free Software Foundation, either version 3 of the License, or
+dnl (at your option) any later version.
+dnl
+dnl This program is distributed in the hope that it will be useful,
+dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
+dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+dnl GNU General Public License for more details.
+dnl
+dnl You should have received a copy of the GNU General Public License
+dnl along with this program. If not, see <https://www.gnu.org/licenses/>.
+dnl
+dnl Written by Jim Meyering.
+
+# gl_GCC_VERSION_IFELSE([major], [minor], [run-if-found], [run-if-not-found])
+# ------------------------------------------------
+# If $CPP is gcc-MAJOR.MINOR or newer, then run RUN-IF-FOUND.
+# Otherwise, run RUN-IF-NOT-FOUND.
+AC_DEFUN([gl_GCC_VERSION_IFELSE],
+ [AC_PREPROC_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[
+#if ($1) < __GNUC__ || (($1) == __GNUC__ && ($2) <= __GNUC_MINOR__)
+/* ok */
+#else
+# error "your version of gcc is older than $1.$2"
+#endif
+ ]]),
+ ], [$3], [$4])
+ ]
+)
diff --git a/m4/gl_manywarnings.m4 b/m4/gl_manywarnings.m4
new file mode 100644
index 0000000..872ea58
--- /dev/null
+++ b/m4/gl_manywarnings.m4
@@ -0,0 +1,209 @@
+# manywarnings.m4 serial 23
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Simon Josefsson
+
+# gl_MANYWARN_COMPLEMENT(OUTVAR, LISTVAR, REMOVEVAR)
+# --------------------------------------------------
+# Copy LISTVAR to OUTVAR except for the entries in REMOVEVAR.
+# Elements separated by whitespace. In set logic terms, the function
+# does OUTVAR = LISTVAR \ REMOVEVAR.
+AC_DEFUN([gl_MANYWARN_COMPLEMENT],
+[
+ gl_warn_set=
+ set x $2; shift
+ for gl_warn_item
+ do
+ case " $3 " in
+ *" $gl_warn_item "*)
+ ;;
+ *)
+ gl_AS_VAR_APPEND([gl_warn_set], [" $gl_warn_item"])
+ ;;
+ esac
+ done
+ $1=$gl_warn_set
+])
+
+# gl_MANYWARN_ALL_GCC(VARIABLE)
+# -----------------------------
+# Add all documented GCC warning parameters to variable VARIABLE.
+# Note that you need to test them using gl_WARN_ADD if you want to
+# make sure your gcc understands it.
+#
+# The effects of this macro depend on the current language (_AC_LANG).
+AC_DEFUN([gl_MANYWARN_ALL_GCC],
+[_AC_LANG_DISPATCH([$0], _AC_LANG, $@)])
+
+# Specialization for _AC_LANG = C.
+AC_DEFUN([gl_MANYWARN_ALL_GCC(C)],
+[
+ AC_LANG_PUSH([C])
+
+ dnl First, check for some issues that only occur when combining multiple
+ dnl gcc warning categories.
+ AC_REQUIRE([AC_PROG_CC])
+ if test -n "$GCC"; then
+
+ dnl Check if -Wextra -Werror -Wno-missing-field-initializers is supported
+ dnl with the current $CC $CFLAGS $CPPFLAGS.
+ AC_CACHE_CHECK([whether -Wno-missing-field-initializers is supported],
+ [gl_cv_cc_nomfi_supported],
+ [gl_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Wextra -Werror -Wno-missing-field-initializers"
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[]], [[]])],
+ [gl_cv_cc_nomfi_supported=yes],
+ [gl_cv_cc_nomfi_supported=no])
+ CFLAGS="$gl_save_CFLAGS"
+ ])
+
+ if test "$gl_cv_cc_nomfi_supported" = yes; then
+ dnl Now check whether -Wno-missing-field-initializers is needed
+ dnl for the { 0, } construct.
+ AC_CACHE_CHECK([whether -Wno-missing-field-initializers is needed],
+ [gl_cv_cc_nomfi_needed],
+ [gl_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Wextra -Werror"
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[int f (void)
+ {
+ typedef struct { int a; int b; } s_t;
+ s_t s1 = { 0, };
+ return s1.b;
+ }
+ ]],
+ [[]])],
+ [gl_cv_cc_nomfi_needed=no],
+ [gl_cv_cc_nomfi_needed=yes])
+ CFLAGS="$gl_save_CFLAGS"
+ ])
+ fi
+
+ dnl Next, check if -Werror -Wuninitialized is useful with the
+ dnl user's choice of $CFLAGS; some versions of gcc warn that it
+ dnl has no effect if -O is not also used
+ AC_CACHE_CHECK([whether -Wuninitialized is supported],
+ [gl_cv_cc_uninitialized_supported],
+ [gl_save_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -Werror -Wuninitialized"
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[]], [[]])],
+ [gl_cv_cc_uninitialized_supported=yes],
+ [gl_cv_cc_uninitialized_supported=no])
+ CFLAGS="$gl_save_CFLAGS"
+ ])
+
+ fi
+
+ # List all gcc warning categories.
+ # To compare this list to your installed GCC's, run this Bash command:
+ #
+ # comm -3 \
+ # <((sed -n 's/^ *\(-[^ 0-9][^ ]*\).*/\1/p' manywarnings.m4; \
+ # awk '/^[^#]/ {print $1}' ../build-aux/gcc-warning.spec) | sort) \
+ # <(LC_ALL=C gcc --help=warnings | sed -n 's/^ \(-[^ ]*\) .*/\1/p' | sort)
+
+ $1=
+ for gl_manywarn_item in -fanalyzer -fno-common \
+ -Wall \
+ -Warith-conversion \
+ -Wbad-function-cast \
+ -Wcast-align=strict \
+ -Wdate-time \
+ -Wdisabled-optimization \
+ -Wdouble-promotion \
+ -Wduplicated-branches \
+ -Wduplicated-cond \
+ -Wextra \
+ -Wformat-signedness \
+ -Winit-self \
+ -Winline \
+ -Winvalid-pch \
+ -Wlogical-op \
+ -Wmissing-declarations \
+ -Wmissing-include-dirs \
+ -Wmissing-prototypes \
+ -Wnested-externs \
+ -Wnull-dereference \
+ -Wold-style-definition \
+ -Wopenmp-simd \
+ -Woverlength-strings \
+ -Wpacked \
+ -Wpointer-arith \
+ -Wshadow \
+ -Wstack-protector \
+ -Wstrict-overflow \
+ -Wstrict-prototypes \
+ -Wsuggest-attribute=cold \
+ -Wsuggest-attribute=const \
+ -Wsuggest-attribute=format \
+ -Wsuggest-attribute=malloc \
+ -Wsuggest-attribute=noreturn \
+ -Wsuggest-attribute=pure \
+ -Wsuggest-final-methods \
+ -Wsuggest-final-types \
+ -Wsync-nand \
+ -Wsystem-headers \
+ -Wtrampolines \
+ -Wuninitialized \
+ -Wunknown-pragmas \
+ -Wunsafe-loop-optimizations \
+ -Wunused-macros \
+ -Wvariadic-macros \
+ -Wvector-operation-performance \
+ -Wvla \
+ -Wwrite-strings \
+ \
+ ; do
+ gl_AS_VAR_APPEND([$1], [" $gl_manywarn_item"])
+ done
+
+ # gcc --help=warnings outputs an unusual form for these options; list
+ # them here so that the above 'comm' command doesn't report a false match.
+ gl_AS_VAR_APPEND([$1], [' -Warray-bounds=2'])
+ gl_AS_VAR_APPEND([$1], [' -Wattribute-alias=2'])
+ gl_AS_VAR_APPEND([$1], [' -Wformat-overflow=2'])
+ gl_AS_VAR_APPEND([$1], [' -Wformat=2'])
+ gl_AS_VAR_APPEND([$1], [' -Wformat-truncation=2'])
+ gl_AS_VAR_APPEND([$1], [' -Wimplicit-fallthrough=5'])
+ gl_AS_VAR_APPEND([$1], [' -Wshift-overflow=2'])
+ gl_AS_VAR_APPEND([$1], [' -Wunused-const-variable=2'])
+ gl_AS_VAR_APPEND([$1], [' -Wvla-larger-than=4031'])
+
+ # These are needed for older GCC versions.
+ if test -n "$GCC"; then
+ case `($CC --version) 2>/dev/null` in
+ 'gcc (GCC) '[[0-3]].* | \
+ 'gcc (GCC) '4.[[0-7]].*)
+ gl_AS_VAR_APPEND([$1], [' -fdiagnostics-show-option'])
+ gl_AS_VAR_APPEND([$1], [' -funit-at-a-time'])
+ ;;
+ esac
+ fi
+
+ # Disable specific options as needed.
+ if test "$gl_cv_cc_nomfi_needed" = yes; then
+ gl_AS_VAR_APPEND([$1], [' -Wno-missing-field-initializers'])
+ fi
+
+ if test "$gl_cv_cc_uninitialized_supported" = no; then
+ gl_AS_VAR_APPEND([$1], [' -Wno-uninitialized'])
+ fi
+
+ # This warning have too many false alarms in GCC 11.2.1.
+ # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101713
+ gl_AS_VAR_APPEND([$1], [' -Wno-analyzer-malloc-leak'])
+
+ AC_LANG_POP([C])
+])
+
+# Specialization for _AC_LANG = C++.
+AC_DEFUN([gl_MANYWARN_ALL_GCC(C++)],
+[
+ gl_MANYWARN_ALL_GCC_CXX_IMPL([$1])
+])
diff --git a/m4/gl_warnings.m4 b/m4/gl_warnings.m4
new file mode 100644
index 0000000..9e24d89
--- /dev/null
+++ b/m4/gl_warnings.m4
@@ -0,0 +1,110 @@
+# warnings.m4 serial 16
+dnl Copyright (C) 2008-2021 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Simon Josefsson
+
+# gl_AS_VAR_APPEND(VAR, VALUE)
+# ----------------------------
+# Provide the functionality of AS_VAR_APPEND if Autoconf does not have it.
+m4_ifdef([AS_VAR_APPEND],
+[m4_copy([AS_VAR_APPEND], [gl_AS_VAR_APPEND])],
+[m4_define([gl_AS_VAR_APPEND],
+[AS_VAR_SET([$1], [AS_VAR_GET([$1])$2])])])
+
+
+# gl_COMPILER_OPTION_IF(OPTION, [IF-SUPPORTED], [IF-NOT-SUPPORTED],
+# [PROGRAM = AC_LANG_PROGRAM()])
+# -----------------------------------------------------------------
+# Check if the compiler supports OPTION when compiling PROGRAM.
+#
+# The effects of this macro depend on the current language (_AC_LANG).
+AC_DEFUN([gl_COMPILER_OPTION_IF],
+[
+AS_VAR_PUSHDEF([gl_Warn], [gl_cv_warn_[]_AC_LANG_ABBREV[]_$1])dnl
+AS_VAR_PUSHDEF([gl_Flags], [_AC_LANG_PREFIX[]FLAGS])dnl
+AS_LITERAL_IF([$1],
+ [m4_pushdef([gl_Positive], m4_bpatsubst([$1], [^-Wno-], [-W]))],
+ [gl_positive="$1"
+case $gl_positive in
+ -Wno-*) gl_positive=-W`expr "X$gl_positive" : 'X-Wno-\(.*\)'` ;;
+esac
+m4_pushdef([gl_Positive], [$gl_positive])])dnl
+AC_CACHE_CHECK([whether _AC_LANG compiler handles $1], [gl_Warn], [
+ gl_save_compiler_FLAGS="$gl_Flags"
+ gl_AS_VAR_APPEND(m4_defn([gl_Flags]),
+ [" $gl_unknown_warnings_are_errors ]m4_defn([gl_Positive])["])
+ AC_LINK_IFELSE([m4_default([$4], [AC_LANG_PROGRAM([[]])])],
+ [AS_VAR_SET([gl_Warn], [yes])],
+ [AS_VAR_SET([gl_Warn], [no])])
+ gl_Flags="$gl_save_compiler_FLAGS"
+])
+AS_VAR_IF(gl_Warn, [yes], [$2], [$3])
+m4_popdef([gl_Positive])dnl
+AS_VAR_POPDEF([gl_Flags])dnl
+AS_VAR_POPDEF([gl_Warn])dnl
+])
+
+# gl_UNKNOWN_WARNINGS_ARE_ERRORS
+# ------------------------------
+# Clang doesn't complain about unknown warning options unless one also
+# specifies -Wunknown-warning-option -Werror. Detect this.
+#
+# The effects of this macro depend on the current language (_AC_LANG).
+AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS],
+[_AC_LANG_DISPATCH([$0], _AC_LANG, $@)])
+
+# Specialization for _AC_LANG = C. This macro can be AC_REQUIREd.
+AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS(C)],
+[
+ AC_LANG_PUSH([C])
+ gl_UNKNOWN_WARNINGS_ARE_ERRORS_IMPL
+ AC_LANG_POP([C])
+])
+
+# Specialization for _AC_LANG = C++. This macro can be AC_REQUIREd.
+AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS(C++)],
+[
+ AC_LANG_PUSH([C++])
+ gl_UNKNOWN_WARNINGS_ARE_ERRORS_IMPL
+ AC_LANG_POP([C++])
+])
+
+# Specialization for _AC_LANG = Objective C. This macro can be AC_REQUIREd.
+AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS(Objective C)],
+[
+ AC_LANG_PUSH([Objective C])
+ gl_UNKNOWN_WARNINGS_ARE_ERRORS_IMPL
+ AC_LANG_POP([Objective C])
+])
+
+AC_DEFUN([gl_UNKNOWN_WARNINGS_ARE_ERRORS_IMPL],
+[gl_COMPILER_OPTION_IF([-Werror -Wunknown-warning-option],
+ [gl_unknown_warnings_are_errors='-Wunknown-warning-option -Werror'],
+ [gl_unknown_warnings_are_errors=])])
+
+# gl_WARN_ADD(OPTION, [VARIABLE = WARN_CFLAGS/WARN_CXXFLAGS],
+# [PROGRAM = AC_LANG_PROGRAM()])
+# -----------------------------------------------------------
+# Adds parameter to WARN_CFLAGS/WARN_CXXFLAGS if the compiler supports it
+# when compiling PROGRAM. For example, gl_WARN_ADD([-Wparentheses]).
+#
+# If VARIABLE is a variable name, AC_SUBST it.
+#
+# The effects of this macro depend on the current language (_AC_LANG).
+AC_DEFUN([gl_WARN_ADD],
+[AC_REQUIRE([gl_UNKNOWN_WARNINGS_ARE_ERRORS(]_AC_LANG[)])
+gl_COMPILER_OPTION_IF([$1],
+ [gl_AS_VAR_APPEND(m4_if([$2], [], [[WARN_]_AC_LANG_PREFIX[FLAGS]], [[$2]]), [" $1"])],
+ [],
+ [$3])
+m4_ifval([$2],
+ [AS_LITERAL_IF([$2], [AC_SUBST([$2])])],
+ [AC_SUBST([WARN_]_AC_LANG_PREFIX[FLAGS])])dnl
+])
+
+# Local Variables:
+# mode: autoconf
+# End:
diff --git a/src/local.mk b/src/local.mk
new file mode 100644
index 0000000..cda7604
--- /dev/null
+++ b/src/local.mk
@@ -0,0 +1,2 @@
+opkg_opk_SOURCES += \
+ %reldir%/main.c
diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..71f0d9b
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,5 @@
+int
+main(int argc, char *argv[])
+{
+ return 0;
+}