From: Daniel Elstner Date: Mon, 24 Aug 2015 19:07:42 +0000 (+0200) Subject: Build: Add copy of libsigrok Autoconf macro file X-Git-Tag: libsigrokdecode-0.4.0~90 X-Git-Url: https://sigrok.org/gitweb/?p=libsigrokdecode.git;a=commitdiff_plain;h=28aeef67d01b0263934feb3147813d3c750f942c Build: Add copy of libsigrok Autoconf macro file --- diff --git a/m4/sigrok.m4 b/m4/sigrok.m4 new file mode 100644 index 0000000..2d0d70f --- /dev/null +++ b/m4/sigrok.m4 @@ -0,0 +1,363 @@ +## +## This file is part of the sigrok project. +## +## Copyright (C) 2009 Openismus GmbH +## Copyright (C) 2015 Daniel Elstner +## +## 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 . +## + +#serial 20150825 + +## SR_APPEND(var-name, [list-sep,] element) +## +## Append the shell word to the shell variable named , +## prefixed by unless the list was empty before appending. If +## only two arguments are supplied, defaults to a single space +## character. +## +AC_DEFUN([SR_APPEND], +[dnl +m4_assert([$# >= 2])[]dnl +$1=[$]{$1[}]m4_if([$#], [2], [[$]{$1:+' '}$2], [[$]{$1:+$2}$3])[]dnl +]) + +## SR_PREPEND(var-name, [list-sep,] element) +## +## Prepend the shell word to the shell variable named , +## suffixed by unless the list was empty before prepending. If +## only two arguments are supplied, defaults to a single space +## character. +## +AC_DEFUN([SR_PREPEND], +[dnl +m4_assert([$# >= 2])[]dnl +$1=m4_if([$#], [2], [$2[$]{$1:+' '}], [$3[$]{$1:+$2}])[$]$1[]dnl +]) + +## _SR_PKG_VERSION_SET(var-prefix, pkg-name, tag-prefix, base-version, major, minor, [micro]) +## +m4_define([_SR_PKG_VERSION_SET], +[dnl +m4_assert([$# >= 6])[]dnl +$1=$4 +sr_git_deps= +# Check if we can get revision information from git. +sr_head=`git -C "$srcdir" rev-parse --verify --short HEAD 2>&AS_MESSAGE_LOG_FD` + +AS_IF([test "$?" = 0 && test "x$sr_head" != x], [dnl + test ! -f "$srcdir/.git/HEAD" \ + || sr_git_deps="$sr_git_deps \$(top_srcdir)/.git/HEAD" + + sr_head_name=`git -C "$srcdir" rev-parse --symbolic-full-name HEAD 2>&AS_MESSAGE_LOG_FD` + AS_IF([test "$?" = 0 && test -f "$srcdir/.git/$sr_head_name"], + [sr_git_deps="$sr_git_deps \$(top_srcdir)/.git/$sr_head_name"]) + + # Append the revision hash unless we are exactly on a tagged release. + git -C "$srcdir" describe --match "$3$4" \ + --exact-match >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD \ + || $1="[$]$1-git-$sr_head" +]) +# Use $(wildcard) so that things do not break if for whatever +# reason these files do not exist anymore at make time. +AS_IF([test -n "$sr_git_deps"], + [SR_APPEND([CONFIG_STATUS_DEPENDENCIES], ["\$(wildcard$sr_git_deps)"])]) +AC_SUBST([CONFIG_STATUS_DEPENDENCIES])[]dnl +AC_SUBST([$1])[]dnl +dnl +AC_DEFINE([$1_MAJOR], [$5], [Major version number of $2.])[]dnl +AC_DEFINE([$1_MINOR], [$6], [Minor version number of $2.])[]dnl +m4_ifval([$7], [AC_DEFINE([$1_MICRO], [$7], [Micro version number of $2.])])[]dnl +AC_DEFINE_UNQUOTED([$1_STRING], ["[$]$1"], [Version of $2.])[]dnl +]) + +## SR_PKG_VERSION_SET(var-prefix, version-triple) +## +## Set up substitution variables and macro definitions for the package +## version components. Derive the version suffix from the repository +## revision if possible. +## +## Substitutions: +## Macro defines: _{MAJOR,MINOR,MICRO,STRING} +## +AC_DEFUN([SR_PKG_VERSION_SET], +[dnl +m4_assert([$# >= 2])[]dnl +_SR_PKG_VERSION_SET([$1], + m4_defn([AC_PACKAGE_NAME]), + m4_defn([AC_PACKAGE_TARNAME])[-], + m4_expand([$2]), + m4_unquote(m4_split(m4_expand([$2]), [\.]))) +]) + +## _SR_LIB_VERSION_SET(var-prefix, pkg-name, abi-triple, current, revision, age) +## +m4_define([_SR_LIB_VERSION_SET], +[dnl +m4_assert([$# >= 6])[]dnl +$1=$3 +AC_SUBST([$1])[]dnl +AC_DEFINE([$1_CURRENT], [$4], [Binary version of $2.])[]dnl +AC_DEFINE([$1_REVISION], [$5], [Binary revision of $2.])[]dnl +AC_DEFINE([$1_AGE], [$6], [Binary age of $2.])[]dnl +AC_DEFINE([$1_STRING], ["$3"], [Binary version triple of $2.])[]dnl +]) + +## SR_LIB_VERSION_SET(var-prefix, abi-triple) +## +## Set up substitution variables and macro definitions for a library +## binary version. +## +## Substitutions: +## Macro defines: _{CURRENT,REVISION,AGE,STRING} +## +AC_DEFUN([SR_LIB_VERSION_SET], +[dnl +m4_assert([$# >= 1])[]dnl +_SR_LIB_VERSION_SET([$1], + m4_defn([AC_PACKAGE_NAME]), + [$2], m4_unquote(m4_split([$2], [:]))) +]) + +## SR_SEARCH_LIBS(libs-var, function, search-libs, +## [action-if-found], [action-if-not-found], [other-libs]) +## +## Same as AC_SEARCH_LIBS, except that the result is prepended +## to instead of LIBS. Calls AC_SUBST on . +## +AC_DEFUN([SR_SEARCH_LIBS], +[dnl +m4_assert([$# >= 3])[]dnl +sr_sl_save_LIBS=$LIBS +AC_SEARCH_LIBS([$2], [$3],,, m4_join([$6], [[$]$1])) +LIBS=$sr_sl_save_LIBS +AS_CASE([$ac_cv_search_$2], [no*],, + [SR_PREPEND([$1], [$ac_cv_search_$2])]) +m4_ifvaln([$4$5], [AS_IF([test "x$ac_cv_search_$2" = xno], [$5], [$4])])[]dnl +AC_SUBST([$1])[]dnl +]) + +## _SR_VAR_SUMMARY(tag, var-name, line-leader, align-columns, align-char) +## +m4_define([_SR_VAR_SUMMARY], [dnl +$2= +$1_append() { + sr_aligned=`printf '%.$4s' "[$][1]m4_for([i], [1], [$4],, [$5])"` + $2="[$]{$2}$3$sr_aligned [$]2"' +' +} +]) + +## SR_VAR_SUMMARY(tag, [var-name = ], +## [line-leader = [ - ]], [align-columns = 32], [align-char = .]) +## +## Define a shell function _append() to be used for aggregating +## a summary of test results in the shell variable . +## +AC_DEFUN([SR_VAR_SUMMARY], +[dnl +m4_assert([$# >= 1])[]dnl +_SR_VAR_SUMMARY([$1], + m4_default_quoted([$2], [$1]), + m4_default_quoted([$3], [ - ]), + m4_default_quoted([$4], [32]), + m4_default_quoted([$5], [.]))[]dnl +]) + +## SR_PKG_CHECK_SUMMARY([var-name = sr_pkg_check_summary], +## [line-leader = [ - ]], [align-columns = 32], [align-char = .]) +## +## Prepare for the aggregation of package check results +## in the shell variable . +## +AC_DEFUN([SR_PKG_CHECK_SUMMARY], + [SR_VAR_SUMMARY([sr_pkg_check_summary], $@)]) + +## SR_PKG_CHECK(tag, [collect-var], module...) +## +## Check for each pkg-config in the argument list. may +## include a version constraint. +## +## Output variables: sr_have_, sr__version +## +AC_DEFUN([SR_PKG_CHECK], +[dnl +m4_assert([$# >= 3])[]dnl +AC_REQUIRE([PKG_PROG_PKG_CONFIG])[]dnl +AC_REQUIRE([SR_PKG_CHECK_SUMMARY])[]dnl +dnl +PKG_CHECK_EXISTS([$3], [dnl + sr_have_$1=yes + m4_ifval([$2], [SR_APPEND([$2], ["$3"]) + ])sr_$1_version=`$PKG_CONFIG --modversion "$3" 2>&AS_MESSAGE_LOG_FD` + sr_pkg_check_summary_append "$3" "$sr_$1_version"[]dnl +], [dnl + sr_pkg_check_summary_append "$3" no + m4_ifval([$4], + [SR_PKG_CHECK([$1], [$2], m4_shift3($@))], + [sr_have_$1=no sr_$1_version=])[]dnl +]) +]) + +## SR_VAR_OPT_PKG([modules-var], [features-var]) +## +## Enable the collection of SR_ARG_OPT_PKG results into the shell variables +## and . +## +AC_DEFUN([SR_VAR_OPT_PKG], +[dnl +m4_define([_SR_VAR_OPT_PKG_MODULES], [$1])[]dnl +m4_define([_SR_VAR_OPT_PKG_FEATURES], [$2])[]dnl +m4_ifvaln([$1], [$1=])[]dnl +m4_ifvaln([$2], [$2=])[]dnl +]) + +## _SR_ARG_OPT_PKG(sh-name, [modules-var], [features-var], +## opt-name, [cpp-name], [cond-name], module...) +## +m4_define([_SR_ARG_OPT_PKG], +[dnl +AC_ARG_WITH([$4], [AS_HELP_STRING([--without-$4], + [disable $4 support [default=detect]])]) +AS_IF([test "x$with_$1" = xno], [sr_have_$1=no], + [test "x$sr_have_$1" != xyes], + [SR_PKG_CHECK([$1], [$2], m4_shiftn([6], $@))]) +AS_IF([test "x$with_$1$sr_have_$1" = xyesno], + [AC_MSG_ERROR([$4 support requested, but it was not found.])]) +AS_IF([test "x$sr_have_$1" = xyes], [m4_ifval([$3], [ + SR_APPEND([$3], ["$4"])])[]m4_ifval([$5], [ + AC_DEFINE([HAVE_$5], [1], [Whether $4 is available.]) + AC_DEFINE_UNQUOTED([CONF_$5_VERSION], ["$sr_$1_version"], + [Build-time version of $4.])])[]dnl +]) +m4_ifvaln([$6], [AM_CONDITIONAL([$6], [test "x$sr_have_$1" = xyes])])[]dnl +]) + +## SR_ARG_OPT_PKG(opt-name, [cpp-name], [cond-name], module...) +## +## Provide a --without- configure option for explicit disabling +## of an optional dependency. If not disabled, the availability of the +## optional dependency is auto-detected. +## +## Each pkg-config argument is checked in turn, and the first one +## found is selected. On success, the shell variable sr_have_ +## is set to "yes", otherwise to "no". Optionally, a preprocessor macro +## HAVE_ and an Automake conditional are generated. +## +## Use SR_VAR_OPT_PKG to generate lists of available modules and features. +## +AC_DEFUN([SR_ARG_OPT_PKG], +[dnl +m4_assert([$# >= 4])[]dnl +AC_REQUIRE([PKG_PROG_PKG_CONFIG])[]dnl +AC_REQUIRE([SR_PKG_CHECK_SUMMARY])[]dnl +AC_REQUIRE([SR_VAR_OPT_PKG])[]dnl +dnl +_SR_ARG_OPT_PKG(m4_expand([AS_TR_SH([$1])]), + m4_defn([_SR_VAR_OPT_PKG_MODULES]), + m4_defn([_SR_VAR_OPT_PKG_FEATURES]), + $@)[]dnl +]) + +## SR_CHECK_COMPILE_FLAGS(flags-var, description, flags) +## +## Find a compiler flag for . For each flag in , check +## if the compiler for the current language accepts it. On success, stop the +## search and append the last tested flag to . Calls AC_SUBST +## on . +## +AC_DEFUN([SR_CHECK_COMPILE_FLAGS], +[dnl +m4_assert([$# >= 3])[]dnl +AC_MSG_CHECKING([compiler flag for $2]) +sr_ccf_result=no +sr_ccf_save_CPPFLAGS=$CPPFLAGS +for sr_flag in $3 +do + CPPFLAGS="$sr_ccf_save_CPPFLAGS $sr_flag" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [sr_ccf_result=$sr_flag]) + test "x$sr_ccf_result" = xno || break +done +CPPFLAGS=$sr_ccf_save_CPPFLAGS +AS_IF([test "x$sr_ccf_result" != xno], + [SR_APPEND([$1], [$sr_ccf_result])]) +AC_MSG_RESULT([$sr_ccf_result]) +AC_SUBST([$1]) +]) + +## _SR_ARG_ENABLE_WARNINGS_ONCE +## +## Implementation helper macro of SR_ARG_ENABLE_WARNINGS. Pulled in +## through AC_REQUIRE so that it is only expanded once. +## +m4_define([_SR_ARG_ENABLE_WARNINGS_ONCE], +[dnl +AC_PROVIDE([$0])[]dnl +AC_ARG_ENABLE([warnings], + [AS_HELP_STRING([[--enable-warnings[=min|max|fatal|no]]], + [set compile pedantry level [default=max]])], + [sr_enable_warnings=$enableval], + [sr_enable_warnings=max])[]dnl +dnl +# Test whether the compiler accepts each flag. Look at standard output, +# since GCC only shows a warning message if an option is not supported. +sr_check_compile_warning_flags() { + for sr_flag + do + sr_cc_out=`$sr_cc $sr_warning_flags $sr_flag -c "$sr_conftest" 2>&1 || echo failed` + AS_IF([test "$?$sr_cc_out" = 0], + [SR_APPEND([sr_warning_flags], [$sr_flag])], + [AS_ECHO(["$sr_cc: $sr_cc_out"]) >&AS_MESSAGE_LOG_FD]) + rm -f "conftest.[$]{OBJEXT:-o}" + done +} +]) + +## SR_ARG_ENABLE_WARNINGS(variable, min-flags, max-flags) +## +## Provide the --enable-warnings configure argument, set to "min" by default. +## and should be space-separated lists of compiler +## warning flags to use with --enable-warnings=min or --enable-warnings=max, +## respectively. Warning level "fatal" is the same as "max" but in addition +## enables -Werror mode. +## +## In order to determine the warning options to use with the C++ compiler, +## call AC_LANG([C++]) first to change the current language. If different +## output variables are used, it is also fine to call SR_ARG_ENABLE_WARNINGS +## repeatedly, once for each language setting. +## +AC_DEFUN([SR_ARG_ENABLE_WARNINGS], +[dnl +m4_assert([$# >= 3])[]dnl +AC_REQUIRE([_SR_ARG_ENABLE_WARNINGS_ONCE])[]dnl +dnl +AS_CASE([$ac_compile], + [[*'$CXXFLAGS '*]], [sr_lang='C++' sr_cc=$CXX sr_conftest="conftest.[$]{ac_ext:-cc}"], + [[*'$CFLAGS '*]], [sr_lang=C sr_cc=$CC sr_conftest="conftest.[$]{ac_ext:-c}"], + [AC_MSG_ERROR([[current language is neither C nor C++]])]) +dnl +AC_MSG_CHECKING([which $sr_lang compiler warning flags to use]) +sr_warning_flags= +AC_LANG_CONFTEST([AC_LANG_SOURCE([[ +int main(int argc, char** argv) { return (argv != 0) ? argc : 0; } +]])]) +AS_CASE([$sr_enable_warnings], + [no], [], + [min], [sr_check_compile_warning_flags $2], + [fatal], [sr_check_compile_warning_flags $3 -Werror], + [sr_check_compile_warning_flags $3]) +rm -f "$sr_conftest" +AC_SUBST([$1], [$sr_warning_flags]) +AC_MSG_RESULT([[$]{sr_warning_flags:-none}])[]dnl +])