1 ## Copyright (c) 2009 Openismus GmbH
2 ## Copyright (c) 2015 Daniel Elstner <daniel.kitta@gmail.com>
4 ## This file is part of the sigrok project.
6 ## sigrok is free software: you can redistribute it and/or modify it
7 ## under the terms of the GNU General Public License as published by
8 ## the Free Software Foundation, either version 3 of the License, or
9 ## (at your option) any later version.
11 ## sigrok is distributed in the hope that it will be useful,
12 ## but WITHOUT ANY WARRANTY; without even the implied warranty of
13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 ## GNU General Public License for more details.
16 ## You should have received a copy of the GNU General Public License
17 ## along with sigrok. If not, see <http://www.gnu.org/licenses/>.
21 ## SR_APPEND(var-name, [list-sep,] element)
23 ## Append the shell word <element> to the shell variable named <var-name>,
24 ## prefixed by <list-sep> unless the list was empty before appending. If
25 ## only two arguments are supplied, <list-sep> defaults to a single space
30 m4_assert([$# >= 2])[]dnl
31 $1=[$]{$1[}]m4_if([$#], [2], [[$]{$1:+' '}$2], [[$]{$1:+$2}$3])[]dnl
34 ## _SR_PKG_VERSION_SET(var-prefix, pkg-name, tag-prefix, base-version, major, minor, [micro])
36 m4_define([_SR_PKG_VERSION_SET],
38 m4_assert([$# >= 6])[]dnl
41 # Check if we can get revision information from git.
42 sr_head=`git -C "$srcdir" rev-parse --verify --short HEAD 2>&AS_MESSAGE_LOG_FD`
44 AS_IF([test "$?" = 0 && test "x$sr_head" != x], [dnl
45 test ! -f "$srcdir/.git/HEAD" \
46 || sr_git_deps="$sr_git_deps \$(top_srcdir)/.git/HEAD"
48 sr_head_name=`git -C "$srcdir" rev-parse --symbolic-full-name HEAD 2>&AS_MESSAGE_LOG_FD`
49 AS_IF([test "$?" = 0 && test -f "$srcdir/.git/$sr_head_name"],
50 [sr_git_deps="$sr_git_deps \$(top_srcdir)/.git/$sr_head_name"])
52 # Append the revision hash unless we are exactly on a tagged release.
53 git -C "$srcdir" describe --match "$3$4" \
54 --exact-match >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD \
55 || $1="[$]$1-git-$sr_head"
57 # Use $(wildcard) so that things do not break if for whatever
58 # reason these files do not exist anymore at make time.
59 AS_IF([test -n "$sr_git_deps"],
60 [SR_APPEND([CONFIG_STATUS_DEPENDENCIES], ["\$(wildcard$sr_git_deps)"])])
61 AC_SUBST([CONFIG_STATUS_DEPENDENCIES])[]dnl
64 AC_DEFINE([$1_MAJOR], [$5], [Major version number of $2.])[]dnl
65 AC_DEFINE([$1_MINOR], [$6], [Minor version number of $2.])[]dnl
66 m4_ifval([$7], [AC_DEFINE([$1_MICRO], [$7], [Micro version number of $2.])])[]dnl
67 AC_DEFINE_UNQUOTED([$1_STRING], ["[$]$1"], [Version of $2.])[]dnl
70 ## SR_PKG_VERSION_SET(var-prefix, version-triple)
72 ## Set up substitution variables and macro definitions for the package
73 ## version components. Derive the version suffix from the repository
74 ## revision if possible.
76 ## Substitutions: <var-prefix>
77 ## Macro defines: <var-prefix>_{MAJOR,MINOR,MICRO,STRING}
79 AC_DEFUN([SR_PKG_VERSION_SET],
81 m4_assert([$# >= 2])[]dnl
82 _SR_PKG_VERSION_SET([$1],
83 m4_defn([AC_PACKAGE_NAME]),
84 m4_defn([AC_PACKAGE_TARNAME])[-],
86 m4_unquote(m4_split(m4_expand([$2]), [\.])))
89 ## _SR_LIB_VERSION_SET(var-prefix, pkg-name, abi-triple, current, revision, age)
91 m4_define([_SR_LIB_VERSION_SET],
93 m4_assert([$# >= 6])[]dnl
96 AC_DEFINE([$1_CURRENT], [$4], [Binary version of $2.])[]dnl
97 AC_DEFINE([$1_REVISION], [$5], [Binary revision of $2.])[]dnl
98 AC_DEFINE([$1_AGE], [$6], [Binary age of $2.])[]dnl
99 AC_DEFINE([$1_STRING], ["$3"], [Binary version triple of $2.])[]dnl
102 ## SR_LIB_VERSION_SET(var-prefix, abi-triple)
104 ## Set up substitution variables and macro definitions for a library
107 ## Substitutions: <var-prefix>
108 ## Macro defines: <var-prefix>_{CURRENT,REVISION,AGE,STRING}
110 AC_DEFUN([SR_LIB_VERSION_SET],
112 m4_assert([$# >= 1])[]dnl
113 _SR_LIB_VERSION_SET([$1],
114 m4_defn([AC_PACKAGE_NAME]),
115 [$2], m4_unquote(m4_split([$2], [:])))
118 ## _SR_VAR_SUMMARY(tag, var-name, line-leader, align-columns, align-char)
120 m4_define([_SR_VAR_SUMMARY], [dnl
123 sr_aligned=`printf '%.$4s' "[$][1]m4_for([i], [1], [$4],, [$5])"`
124 $2="[$]{$2}$3$sr_aligned [$]2"'
129 ## SR_VAR_SUMMARY(tag, [var-name = <tag>],
130 ## [line-leader = [ - ]], [align-columns = 32], [align-char = .])
132 ## Define a shell function <tag>_append() to be used for aggregating
133 ## a summary of test results in the shell variable <var-name>.
135 AC_DEFUN([SR_VAR_SUMMARY],
137 m4_assert([$# >= 1])[]dnl
138 _SR_VAR_SUMMARY([$1],
139 m4_default_quoted([$2], [$1]),
140 m4_default_quoted([$3], [ - ]),
141 m4_default_quoted([$4], [32]),
142 m4_default_quoted([$5], [.]))[]dnl
145 ## SR_PKG_CHECK_SUMMARY([var-name = sr_pkg_check_summary],
146 ## [line-leader = [ - ]], [align-columns = 32], [align-char = .])
148 ## Prepare for the aggregation of package check results
149 ## in the shell variable <var-name>.
151 AC_DEFUN([SR_PKG_CHECK_SUMMARY],
152 [SR_VAR_SUMMARY([sr_pkg_check_summary], $@)])
154 ## SR_PKG_CHECK(tag, [collect-var], module...)
156 ## Check for each pkg-config <module> in the argument list. <module> may
157 ## include a version constraint.
159 ## Output variables: sr_have_<tag>, sr_<tag>_version
161 AC_DEFUN([SR_PKG_CHECK],
163 m4_assert([$# >= 3])[]dnl
164 AC_REQUIRE([PKG_PROG_PKG_CONFIG])[]dnl
165 AC_REQUIRE([SR_PKG_CHECK_SUMMARY])[]dnl
167 PKG_CHECK_EXISTS([$3], [dnl
169 m4_ifval([$2], [SR_APPEND([$2], ["$3"])
170 ])sr_$1_version=`$PKG_CONFIG --modversion "$3" 2>&AS_MESSAGE_LOG_FD`
171 sr_pkg_check_summary_append "$3" "$sr_$1_version"[]dnl
173 sr_pkg_check_summary_append "$3" no
175 [SR_PKG_CHECK([$1], [$2], m4_shift3($@))],
176 [sr_have_$1=no sr_$1_version=])[]dnl
180 ## SR_VAR_OPT_PKG([modules-var], [features-var])
182 ## Enable the collection of SR_ARG_OPT_PKG results into the shell variables
183 ## <modules-var> and <features-var>.
185 AC_DEFUN([SR_VAR_OPT_PKG],
187 m4_define([_SR_VAR_OPT_PKG_MODULES], [$1])[]dnl
188 m4_define([_SR_VAR_OPT_PKG_FEATURES], [$2])[]dnl
189 m4_ifvaln([$1], [$1=])[]dnl
190 m4_ifvaln([$2], [$2=])[]dnl
193 ## _SR_ARG_OPT_PKG(sh-name, [modules-var], [features-var],
194 ## opt-name, [cpp-name], [cond-name], module...)
196 m4_define([_SR_ARG_OPT_PKG],
198 AC_ARG_WITH([$4], [AS_HELP_STRING([--without-$4],
199 [disable $4 support [default=detect]])])
200 AS_IF([test "x$with_$1" = xno], [sr_have_$1=no],
201 [test "x$sr_have_$1" != xyes],
202 [SR_PKG_CHECK([$1], [$2], m4_shiftn([6], $@))])
203 AS_IF([test "x$with_$1$sr_have_$1" = xyesno],
204 [AC_MSG_ERROR([$4 support requested, but it was not found.])])
205 AS_IF([test "x$sr_have_$1" = xyes], [m4_ifval([$3], [
206 SR_APPEND([$3], ["$4"])])[]m4_ifval([$5], [
207 AC_DEFINE([HAVE_$5], [1], [Whether $4 is available.])
208 AC_DEFINE_UNQUOTED([CONF_$5_VERSION], ["$sr_$1_version"],
209 [Build-time version of $4.])])[]dnl
211 m4_ifvaln([$6], [AM_CONDITIONAL([$6], [test "x$sr_have_$1" = xyes])])[]dnl
214 ## SR_ARG_OPT_PKG(opt-name, [cpp-name], [cond-name], module...)
216 ## Provide a --without-<opt-name> configure option for explicit disabling
217 ## of an optional dependency. If not disabled, the availability of the
218 ## optional dependency is auto-detected.
220 ## Each pkg-config <module> argument is checked in turn, and the first one
221 ## found is selected. On success, the shell variable sr_have_<opt-name>
222 ## is set to "yes", otherwise to "no". Optionally, a preprocessor macro
223 ## HAVE_<cpp-name> and an Automake conditional <cond-name> are generated.
225 ## Use SR_VAR_OPT_PKG to generate lists of available modules and features.
227 AC_DEFUN([SR_ARG_OPT_PKG],
229 m4_assert([$# >= 4])[]dnl
230 AC_REQUIRE([PKG_PROG_PKG_CONFIG])[]dnl
231 AC_REQUIRE([SR_PKG_CHECK_SUMMARY])[]dnl
232 AC_REQUIRE([SR_VAR_OPT_PKG])[]dnl
234 _SR_ARG_OPT_PKG(m4_expand([AS_TR_SH([$1])]),
235 m4_defn([_SR_VAR_OPT_PKG_MODULES]),
236 m4_defn([_SR_VAR_OPT_PKG_FEATURES]),
240 ## SR_CHECK_COMPILE_FLAGS(flags-var, description, flags)
242 ## Find a compiler flag for <description>. For each flag in <flags>, check
243 ## if the compiler for the current language accepts it. On success, stop the
244 ## search and append the last tested flag to <flags-var>. Calls AC_SUBST
247 AC_DEFUN([SR_CHECK_COMPILE_FLAGS],
249 m4_assert([$# >= 3])[]dnl
250 AC_MSG_CHECKING([compiler flag for $2])
252 sr_ccf_save_CPPFLAGS=$CPPFLAGS
255 CPPFLAGS="$sr_ccf_save_CPPFLAGS $sr_flag"
256 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [sr_ccf_result=$sr_flag])
257 test "x$sr_ccf_result" = xno || break
259 CPPFLAGS=$sr_ccf_save_CPPFLAGS
260 SR_APPEND([$1], [$sr_ccf_result])
261 AC_MSG_RESULT([$sr_ccf_result])
265 ## _SR_ARG_ENABLE_WARNINGS_ONCE
267 ## Implementation helper macro of SR_ARG_ENABLE_WARNINGS. Pulled in
268 ## through AC_REQUIRE so that it is only expanded once.
270 m4_define([_SR_ARG_ENABLE_WARNINGS_ONCE],
272 AC_PROVIDE([$0])[]dnl
273 AC_ARG_ENABLE([warnings],
274 [AS_HELP_STRING([[--enable-warnings[=min|max|fatal|no]]],
275 [set compile pedantry level [default=max]])],
276 [sr_enable_warnings=$enableval],
277 [sr_enable_warnings=max])[]dnl
279 # Test whether the compiler accepts each flag. Look at standard output,
280 # since GCC only shows a warning message if an option is not supported.
281 sr_check_compile_warning_flags() {
284 sr_cc_out=`$sr_cc $sr_warning_flags $sr_flag -c "$sr_conftest" 2>&1 || echo failed`
285 AS_IF([test "$?$sr_cc_out" = 0],
286 [SR_APPEND([sr_warning_flags], [$sr_flag])],
287 [AS_ECHO(["$sr_cc: $sr_cc_out"]) >&AS_MESSAGE_LOG_FD])
288 rm -f "conftest.[$]{OBJEXT:-o}"
293 ## SR_ARG_ENABLE_WARNINGS(variable, min-flags, max-flags)
295 ## Provide the --enable-warnings configure argument, set to "min" by default.
296 ## <min-flags> and <max-flags> should be space-separated lists of compiler
297 ## warning flags to use with --enable-warnings=min or --enable-warnings=max,
298 ## respectively. Warning level "fatal" is the same as "max" but in addition
299 ## enables -Werror mode.
301 ## In order to determine the warning options to use with the C++ compiler,
302 ## call AC_LANG([C++]) first to change the current language. If different
303 ## output variables are used, it is also fine to call SR_ARG_ENABLE_WARNINGS
304 ## repeatedly, once for each language setting.
306 AC_DEFUN([SR_ARG_ENABLE_WARNINGS],
308 m4_assert([$# >= 3])[]dnl
309 AC_REQUIRE([_SR_ARG_ENABLE_WARNINGS_ONCE])[]dnl
311 AS_CASE([$ac_compile],
312 [[*'$CXXFLAGS '*]], [sr_lang='C++' sr_cc=$CXX sr_conftest="conftest.[$]{ac_ext:-cc}"],
313 [[*'$CFLAGS '*]], [sr_lang=C sr_cc=$CC sr_conftest="conftest.[$]{ac_ext:-c}"],
314 [AC_MSG_ERROR([[current language is neither C nor C++]])])
316 AC_MSG_CHECKING([which $sr_lang compiler warning flags to use])
318 AC_LANG_CONFTEST([AC_LANG_SOURCE([[
319 int main(int argc, char** argv) { return (argv != 0) ? argc : 0; }
321 AS_CASE([$sr_enable_warnings],
323 [min], [sr_check_compile_warning_flags $2],
324 [fatal], [sr_check_compile_warning_flags $3 -Werror],
325 [sr_check_compile_warning_flags $3])
327 AC_SUBST([$1], [$sr_warning_flags])
328 AC_MSG_RESULT([[$]{sr_warning_flags:-none}])[]dnl