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| author | Patrick 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) |
| commit | 2710882a528c5e68cf8a647d5b6d3f100d52a9ff (patch) | |
| tree | 8cf60c06607c8e6b88527976f8494cbd698dee7b | |
Initial commit
| -rw-r--r-- | .gitignore | 33 | ||||
| -rw-r--r-- | AUTHORS | 1 | ||||
| -rw-r--r-- | COPYING | 674 | ||||
| -rw-r--r-- | Makefile.am | 103 | ||||
| -rw-r--r-- | NEWS | 17 | ||||
| -rw-r--r-- | README | 16 | ||||
| -rwxr-xr-x | autogen.sh | 19 | ||||
| -rw-r--r-- | configure.ac | 89 | ||||
| -rw-r--r-- | m4/ax_append_flag.m4 | 50 | ||||
| -rw-r--r-- | m4/ax_cflags_warn_all.m4 | 158 | ||||
| -rw-r--r-- | m4/ax_check_compile_flag.m4 | 53 | ||||
| -rw-r--r-- | m4/ax_compiler_vendor.m4 | 117 | ||||
| -rw-r--r-- | m4/ax_prepend_flag.m4 | 51 | ||||
| -rw-r--r-- | m4/ax_require_defined.m4 | 37 | ||||
| -rw-r--r-- | m4/gcc_version.m4 | 38 | ||||
| -rw-r--r-- | m4/gl_manywarnings.m4 | 209 | ||||
| -rw-r--r-- | m4/gl_warnings.m4 | 110 | ||||
| -rw-r--r-- | src/local.mk | 2 | ||||
| -rw-r--r-- | src/main.c | 5 |
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 @@ -0,0 +1 @@ +Patrick McDermott <patrick.mcdermott@libiquity.com> @@ -0,0 +1,674 @@ + GNU GENERAL PUBLIC LICENSE + Version 3, 29 June 2007 + + Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/> + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The GNU General Public License is a free, copyleft license for +software and other kinds of works. + + The licenses for most software and other practical works are designed +to take away your freedom to share and change the works. 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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 $(top_srcdir)/src/local.mk @@ -0,0 +1,17 @@ +opkg-opk version 0.1.0 +---------------------- + +Released: ????-??-?? + +This is the initial release of opkg-opk, in development since +2023-04-12. + +Copyright Information +--------------------- + +Copyright (C) 2023 Patrick McDermott + +Copying and distribution of this file, with or without modification, +are permitted in any medium without royalty provided the copyright +notice and this notice are preserved. This file is offered as-is, +without any warranty. @@ -0,0 +1,16 @@ +opkg-opk +-------- + +opkg-opk provides information about packages built by opkbuild for opkg. +It is similar to Debian's dpkg-deb, however it provides only control +file printing and data file listing. + +Copyright +--------- + +Copyright (C) 2023 Patrick McDermott + +Copying and distribution of this file, with or without modification, +are permitted in any medium without royalty provided the copyright +notice and this notice are preserved. This file is offered as-is, +without any warranty. diff --git a/autogen.sh b/autogen.sh new file mode 100755 index 0000000..030bc06 --- /dev/null +++ b/autogen.sh @@ -0,0 +1,19 @@ +#!/bin/sh + +set -e + +srcdir="${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; +} |