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}$3])[]dnl
34 ## SR_PREPEND(var-name, [list-sep,] element)
36 ## Prepend the shell word <element> to the shell variable named <var-name>,
37 ## suffixed by <list-sep> unless the list was empty before prepending. If
38 ## only two arguments are supplied, <list-sep> defaults to a single space
41 AC_DEFUN([SR_PREPEND],
43 m4_assert([$# >= 2])[]dnl
44 $1=m4_if([$#], [2], [$2[$]{$1:+' '}], [$3[$]{$1:+$2}])[$]$1[]dnl
47 ## _SR_PKG_VERSION_SET(var-prefix, pkg-name, tag-prefix, base-version, major, minor, [micro])
49 m4_define([_SR_PKG_VERSION_SET],
51 m4_assert([$# >= 6])[]dnl
54 # Check if we can get revision information from git.
55 sr_head=`git -C "$srcdir" rev-parse --verify --short HEAD 2>&AS_MESSAGE_LOG_FD`
57 AS_IF([test "$?" = 0 && test "x$sr_head" != x], [dnl
58 test ! -f "$srcdir/.git/HEAD" \
59 || sr_git_deps="$sr_git_deps \$(top_srcdir)/.git/HEAD"
61 sr_head_name=`git -C "$srcdir" rev-parse --symbolic-full-name HEAD 2>&AS_MESSAGE_LOG_FD`
62 AS_IF([test "$?" = 0 && test -f "$srcdir/.git/$sr_head_name"],
63 [sr_git_deps="$sr_git_deps \$(top_srcdir)/.git/$sr_head_name"])
65 # Append the revision hash unless we are exactly on a tagged release.
66 git -C "$srcdir" describe --match "$3$4" \
67 --exact-match >&AS_MESSAGE_LOG_FD 2>&AS_MESSAGE_LOG_FD \
68 || $1="[$]$1-git-$sr_head"
70 # Use $(wildcard) so that things do not break if for whatever
71 # reason these files do not exist anymore at make time.
72 AS_IF([test -n "$sr_git_deps"],
73 [SR_APPEND([CONFIG_STATUS_DEPENDENCIES], ["\$(wildcard$sr_git_deps)"])])
74 AC_SUBST([CONFIG_STATUS_DEPENDENCIES])[]dnl
77 AC_DEFINE([$1_MAJOR], [$5], [Major version number of $2.])[]dnl
78 AC_DEFINE([$1_MINOR], [$6], [Minor version number of $2.])[]dnl
79 m4_ifval([$7], [AC_DEFINE([$1_MICRO], [$7], [Micro version number of $2.])])[]dnl
80 AC_DEFINE_UNQUOTED([$1_STRING], ["[$]$1"], [Version of $2.])[]dnl
83 ## SR_PKG_VERSION_SET(var-prefix, version-triple)
85 ## Set up substitution variables and macro definitions for the package
86 ## version components. Derive the version suffix from the repository
87 ## revision if possible.
89 ## Substitutions: <var-prefix>
90 ## Macro defines: <var-prefix>_{MAJOR,MINOR,MICRO,STRING}
92 AC_DEFUN([SR_PKG_VERSION_SET],
94 m4_assert([$# >= 2])[]dnl
95 _SR_PKG_VERSION_SET([$1],
96 m4_defn([AC_PACKAGE_NAME]),
97 m4_defn([AC_PACKAGE_TARNAME])[-],
99 m4_unquote(m4_split(m4_expand([$2]), [\.])))
102 ## _SR_LIB_VERSION_SET(var-prefix, pkg-name, abi-triple, current, revision, age)
104 m4_define([_SR_LIB_VERSION_SET],
106 m4_assert([$# >= 6])[]dnl
109 AC_DEFINE([$1_CURRENT], [$4], [Binary version of $2.])[]dnl
110 AC_DEFINE([$1_REVISION], [$5], [Binary revision of $2.])[]dnl
111 AC_DEFINE([$1_AGE], [$6], [Binary age of $2.])[]dnl
112 AC_DEFINE([$1_STRING], ["$3"], [Binary version triple of $2.])[]dnl
115 ## SR_LIB_VERSION_SET(var-prefix, abi-triple)
117 ## Set up substitution variables and macro definitions for a library
120 ## Substitutions: <var-prefix>
121 ## Macro defines: <var-prefix>_{CURRENT,REVISION,AGE,STRING}
123 AC_DEFUN([SR_LIB_VERSION_SET],
125 m4_assert([$# >= 1])[]dnl
126 _SR_LIB_VERSION_SET([$1],
127 m4_defn([AC_PACKAGE_NAME]),
128 [$2], m4_unquote(m4_split([$2], [:])))
131 ## SR_SEARCH_LIBS(libs-var, function, search-libs,
132 ## [action-if-found], [action-if-not-found], [other-libs])
134 ## Same as AC_SEARCH_LIBS, except that the result is prepended
135 ## to <libs-var> instead of LIBS. Calls AC_SUBST on <libs-var>.
137 AC_DEFUN([SR_SEARCH_LIBS],
139 m4_assert([$# >= 3])[]dnl
140 sr_sl_save_LIBS=$LIBS
141 AC_SEARCH_LIBS([$2], [$3],,, m4_join([$6], [[$]$1]))
142 LIBS=$sr_sl_save_LIBS
143 AS_CASE([$ac_cv_search_$2], [no*],,
144 [SR_PREPEND([$1], [$ac_cv_search_$2])])
145 m4_ifvaln([$4$5], [AS_IF([test "x$ac_cv_search_$2" = xno], [$5], [$4])])[]dnl
149 ## _SR_VAR_SUMMARY(tag, var-name, line-leader, align-columns, align-char)
151 m4_define([_SR_VAR_SUMMARY], [dnl
154 sr_aligned=`printf '%.$4s' "[$][1]m4_for([i], [1], [$4],, [$5])"`
155 $2="[$]{$2}$3$sr_aligned [$]2"'
160 ## SR_VAR_SUMMARY(tag, [var-name = <tag>],
161 ## [line-leader = [ - ]], [align-columns = 32], [align-char = .])
163 ## Define a shell function <tag>_append() to be used for aggregating
164 ## a summary of test results in the shell variable <var-name>.
166 AC_DEFUN([SR_VAR_SUMMARY],
168 m4_assert([$# >= 1])[]dnl
169 _SR_VAR_SUMMARY([$1],
170 m4_default_quoted([$2], [$1]),
171 m4_default_quoted([$3], [ - ]),
172 m4_default_quoted([$4], [32]),
173 m4_default_quoted([$5], [.]))[]dnl
176 ## SR_PKG_CHECK_SUMMARY([var-name = sr_pkg_check_summary],
177 ## [line-leader = [ - ]], [align-columns = 32], [align-char = .])
179 ## Prepare for the aggregation of package check results
180 ## in the shell variable <var-name>.
182 AC_DEFUN([SR_PKG_CHECK_SUMMARY],
183 [SR_VAR_SUMMARY([sr_pkg_check_summary], $@)])
185 ## SR_PKG_CHECK(tag, [collect-var], module...)
187 ## Check for each pkg-config <module> in the argument list. <module> may
188 ## include a version constraint.
190 ## Output variables: sr_have_<tag>, sr_<tag>_version
192 AC_DEFUN([SR_PKG_CHECK],
194 m4_assert([$# >= 3])[]dnl
195 AC_REQUIRE([PKG_PROG_PKG_CONFIG])[]dnl
196 AC_REQUIRE([SR_PKG_CHECK_SUMMARY])[]dnl
198 PKG_CHECK_EXISTS([$3], [dnl
200 m4_ifval([$2], [SR_APPEND([$2], ["$3"])
201 ])sr_$1_version=`$PKG_CONFIG --modversion "$3" 2>&AS_MESSAGE_LOG_FD`
202 sr_pkg_check_summary_append "$3" "$sr_$1_version"[]dnl
204 sr_pkg_check_summary_append "$3" no
206 [SR_PKG_CHECK([$1], [$2], m4_shift3($@))],
207 [sr_have_$1=no sr_$1_version=])[]dnl
211 ## SR_VAR_OPT_PKG([modules-var], [features-var])
213 ## Enable the collection of SR_ARG_OPT_PKG results into the shell variables
214 ## <modules-var> and <features-var>.
216 AC_DEFUN([SR_VAR_OPT_PKG],
218 m4_define([_SR_VAR_OPT_PKG_MODULES], [$1])[]dnl
219 m4_define([_SR_VAR_OPT_PKG_FEATURES], [$2])[]dnl
220 m4_ifvaln([$1], [$1=])[]dnl
221 m4_ifvaln([$2], [$2=])[]dnl
224 ## _SR_ARG_OPT_PKG(sh-name, [modules-var], [features-var],
225 ## opt-name, [cpp-name], [cond-name], module...)
227 m4_define([_SR_ARG_OPT_PKG],
229 AC_ARG_WITH([$4], [AS_HELP_STRING([--without-$4],
230 [disable $4 support [default=detect]])])
231 AS_IF([test "x$with_$1" = xno], [sr_have_$1=no],
232 [test "x$sr_have_$1" != xyes],
233 [SR_PKG_CHECK([$1], [$2], m4_shiftn([6], $@))])
234 AS_IF([test "x$with_$1$sr_have_$1" = xyesno],
235 [AC_MSG_ERROR([$4 support requested, but it was not found.])])
236 AS_IF([test "x$sr_have_$1" = xyes], [m4_ifval([$3], [
237 SR_APPEND([$3], ["$4"])])[]m4_ifval([$5], [
238 AC_DEFINE([HAVE_$5], [1], [Whether $4 is available.])
239 AC_DEFINE_UNQUOTED([CONF_$5_VERSION], ["$sr_$1_version"],
240 [Build-time version of $4.])])[]dnl
242 m4_ifvaln([$6], [AM_CONDITIONAL([$6], [test "x$sr_have_$1" = xyes])])[]dnl
245 ## SR_ARG_OPT_PKG(opt-name, [cpp-name], [cond-name], module...)
247 ## Provide a --without-<opt-name> configure option for explicit disabling
248 ## of an optional dependency. If not disabled, the availability of the
249 ## optional dependency is auto-detected.
251 ## Each pkg-config <module> argument is checked in turn, and the first one
252 ## found is selected. On success, the shell variable sr_have_<opt-name>
253 ## is set to "yes", otherwise to "no". Optionally, a preprocessor macro
254 ## HAVE_<cpp-name> and an Automake conditional <cond-name> are generated.
256 ## Use SR_VAR_OPT_PKG to generate lists of available modules and features.
258 AC_DEFUN([SR_ARG_OPT_PKG],
260 m4_assert([$# >= 4])[]dnl
261 AC_REQUIRE([PKG_PROG_PKG_CONFIG])[]dnl
262 AC_REQUIRE([SR_PKG_CHECK_SUMMARY])[]dnl
263 AC_REQUIRE([SR_VAR_OPT_PKG])[]dnl
265 _SR_ARG_OPT_PKG(m4_expand([AS_TR_SH([$1])]),
266 m4_defn([_SR_VAR_OPT_PKG_MODULES]),
267 m4_defn([_SR_VAR_OPT_PKG_FEATURES]),
271 ## SR_CHECK_COMPILE_FLAGS(flags-var, description, flags)
273 ## Find a compiler flag for <description>. For each flag in <flags>, check
274 ## if the compiler for the current language accepts it. On success, stop the
275 ## search and append the last tested flag to <flags-var>. Calls AC_SUBST
278 AC_DEFUN([SR_CHECK_COMPILE_FLAGS],
280 m4_assert([$# >= 3])[]dnl
281 AC_MSG_CHECKING([compiler flag for $2])
283 sr_ccf_save_CPPFLAGS=$CPPFLAGS
286 CPPFLAGS="$sr_ccf_save_CPPFLAGS $sr_flag"
287 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([], [])], [sr_ccf_result=$sr_flag])
288 test "x$sr_ccf_result" = xno || break
290 CPPFLAGS=$sr_ccf_save_CPPFLAGS
291 AS_IF([test "x$sr_ccf_result" != xno],
292 [SR_APPEND([$1], [$sr_ccf_result])])
293 AC_MSG_RESULT([$sr_ccf_result])
297 ## _SR_ARG_ENABLE_WARNINGS_ONCE
299 ## Implementation helper macro of SR_ARG_ENABLE_WARNINGS. Pulled in
300 ## through AC_REQUIRE so that it is only expanded once.
302 m4_define([_SR_ARG_ENABLE_WARNINGS_ONCE],
304 AC_PROVIDE([$0])[]dnl
305 AC_ARG_ENABLE([warnings],
306 [AS_HELP_STRING([[--enable-warnings[=min|max|fatal|no]]],
307 [set compile pedantry level [default=max]])],
308 [sr_enable_warnings=$enableval],
309 [sr_enable_warnings=max])[]dnl
311 # Test whether the compiler accepts each flag. Look at standard output,
312 # since GCC only shows a warning message if an option is not supported.
313 sr_check_compile_warning_flags() {
316 sr_cc_out=`$sr_cc $sr_warning_flags $sr_flag -c "$sr_conftest" 2>&1 || echo failed`
317 AS_IF([test "$?$sr_cc_out" = 0],
318 [SR_APPEND([sr_warning_flags], [$sr_flag])],
319 [AS_ECHO(["$sr_cc: $sr_cc_out"]) >&AS_MESSAGE_LOG_FD])
320 rm -f "conftest.[$]{OBJEXT:-o}"
325 ## SR_ARG_ENABLE_WARNINGS(variable, min-flags, max-flags)
327 ## Provide the --enable-warnings configure argument, set to "min" by default.
328 ## <min-flags> and <max-flags> should be space-separated lists of compiler
329 ## warning flags to use with --enable-warnings=min or --enable-warnings=max,
330 ## respectively. Warning level "fatal" is the same as "max" but in addition
331 ## enables -Werror mode.
333 ## In order to determine the warning options to use with the C++ compiler,
334 ## call AC_LANG([C++]) first to change the current language. If different
335 ## output variables are used, it is also fine to call SR_ARG_ENABLE_WARNINGS
336 ## repeatedly, once for each language setting.
338 AC_DEFUN([SR_ARG_ENABLE_WARNINGS],
340 m4_assert([$# >= 3])[]dnl
341 AC_REQUIRE([_SR_ARG_ENABLE_WARNINGS_ONCE])[]dnl
343 AS_CASE([$ac_compile],
344 [[*'$CXXFLAGS '*]], [sr_lang='C++' sr_cc=$CXX sr_conftest="conftest.[$]{ac_ext:-cc}"],
345 [[*'$CFLAGS '*]], [sr_lang=C sr_cc=$CC sr_conftest="conftest.[$]{ac_ext:-c}"],
346 [AC_MSG_ERROR([[current language is neither C nor C++]])])
348 AC_MSG_CHECKING([which $sr_lang compiler warning flags to use])
350 AC_LANG_CONFTEST([AC_LANG_SOURCE([[
351 int main(int argc, char** argv) { return (argv != 0) ? argc : 0; }
353 AS_CASE([$sr_enable_warnings],
355 [min], [sr_check_compile_warning_flags $2],
356 [fatal], [sr_check_compile_warning_flags $3 -Werror],
357 [sr_check_compile_warning_flags $3])
359 AC_SUBST([$1], [$sr_warning_flags])
360 AC_MSG_RESULT([[$]{sr_warning_flags:-none}])[]dnl