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