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build-sys: Add compiler and linker flags to reduce binary size
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1 # This file is part of systemd.
2 #
3 # Copyright 2010 Lennart Poettering
4 #
5 # systemd is free software; you can redistribute it and/or modify it
6 # under the terms of the GNU General Public License as published by
7 # the Free Software Foundation; either version 2 of the License, or
8 # (at your option) any later version.
9 #
10 # systemd is distributed in the hope that it will be useful, but
11 # WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # General Public License for more details.
14 #
15 # You should have received a copy of the GNU General Public License
16 # along with systemd; If not, see <http://www.gnu.org/licenses/>.
17
18 AC_PREREQ(2.63)
19
20 AC_INIT([systemd],[10],[systemd-devel@lists.freedesktop.org])
21 AC_CONFIG_SRCDIR([src/main.c])
22 AC_CONFIG_MACRO_DIR([m4])
23 AC_CONFIG_HEADERS([config.h])
24
25 AM_INIT_AUTOMAKE([foreign 1.11 -Wall -Wno-portability silent-rules tar-pax subdir-objects dist-bzip2])
26
27 AC_SUBST(PACKAGE_URL, [http://www.freedesktop.org/wiki/Software/systemd])
28
29 AC_CANONICAL_HOST
30 AC_DEFINE_UNQUOTED([CANONICAL_HOST], "$host", [Canonical host string.])
31
32 AM_SILENT_RULES([yes])
33
34 AC_CHECK_PROG([STOW], [stow], [yes], [no])
35
36 AS_IF([test "x$STOW" = "xyes" && test -d /usr/local/stow], [
37 AC_MSG_NOTICE([*** Found /usr/local/stow: default install prefix set to /usr/local/stow/${PACKAGE_NAME}-${PACKAGE_VERSION} ***])
38 ac_default_prefix="/usr/local/stow/${PACKAGE_NAME}-${PACKAGE_VERSION}"
39 ])
40
41 AC_PROG_MKDIR_P
42 AC_PROG_LN_S
43 AC_PROG_SED
44
45 AC_PROG_CC
46 AC_PROG_CC_C99
47 AM_PROG_CC_C_O
48 AC_PROG_GCC_TRADITIONAL
49 AC_USE_SYSTEM_EXTENSIONS
50
51 CC_CHECK_CFLAGS_APPEND([ \
52 -pipe \
53 -Wall \
54 -W \
55 -Wextra \
56 -Wno-inline \
57 -Wvla \
58 -Wundef \
59 -Wformat=2 \
60 -Wlogical-op \
61 -Wsign-compare \
62 -Wformat-security \
63 -Wmissing-include-dirs \
64 -Wformat-nonliteral \
65 -Wold-style-definition \
66 -Wpointer-arith \
67 -Winit-self \
68 -Wdeclaration-after-statement \
69 -Wfloat-equal \
70 -Wmissing-prototypes \
71 -Wstrict-prototypes \
72 -Wredundant-decls \
73 -Wmissing-declarations \
74 -Wmissing-noreturn \
75 -Wshadow \
76 -Wendif-labels \
77 -Wcast-align \
78 -Wstrict-aliasing=2 \
79 -Wwrite-strings \
80 -Wno-long-long \
81 -Wno-overlength-strings \
82 -Wno-unused-parameter \
83 -Wno-missing-field-initializers \
84 -Wno-unused-result \
85 -Wp,-D_FORTIFY_SOURCE=2 \
86 -ffast-math \
87 -fno-common \
88 -fdiagnostics-show-option \
89 -fno-strict-aliasing \
90 -fvisibility=hidden \
91 -ffunction-sections \
92 -fdata-sections \
93 -Wl,--as-needed \
94 -Wl,--gc-sections])
95
96 LT_PREREQ(2.2)
97 LT_INIT
98
99 AC_SEARCH_LIBS([clock_gettime], [rt], [], [AC_MSG_ERROR([*** POSIX RT library not found])])
100 AC_SEARCH_LIBS([dlsym], [dl], [], [AC_MSG_ERROR([*** Dynamic linking loader library not found])])
101 AC_SEARCH_LIBS([cap_init], [cap], [], [AC_MSG_ERROR([*** POSIX caps library not found])])
102 AC_CHECK_HEADERS([sys/capability.h], [], [AC_MSG_ERROR([*** POSIX caps headers not found])])
103
104 # This makes sure pkg.m4 is available.
105 m4_pattern_forbid([^_?PKG_[A-Z_]+$],[*** pkg.m4 missing, please install pkg-config])
106
107 PKG_CHECK_MODULES(UDEV, [ libudev >= 160 ])
108 AC_SUBST(UDEV_CFLAGS)
109 AC_SUBST(UDEV_LIBS)
110
111 PKG_CHECK_MODULES(DBUS, [ dbus-1 >= 1.3.2 ])
112 AC_SUBST(DBUS_CFLAGS)
113 AC_SUBST(DBUS_LIBS)
114
115 PKG_CHECK_MODULES(DBUSGLIB, [ dbus-glib-1 ])
116 AC_SUBST(DBUSGLIB_CFLAGS)
117 AC_SUBST(DBUSGLIB_LIBS)
118
119 have_selinux=no
120 AC_ARG_ENABLE(selinux, AS_HELP_STRING([--disable-selinux], [Disable optional SELINUX support]))
121 if test "x$enable_selinux" != "xno"; then
122 # not using PKG_CHECK_MODULES as for some reason libselinux didn't
123 # install any pkg-config modules here
124 AC_SEARCH_LIBS([getcon], [selinux],
125 [AC_DEFINE(HAVE_SELINUX, 1, [Define if SELINUX is available]) have_selinux=yes],
126 have_selinux=no)
127 AC_SUBST(SELINUX_CFLAGS)
128 AC_SUBST(SELINUX_LIBS)
129 if test "x$have_selinux" = xno -a "x$enable_selinux" = xyes; then
130 AC_MSG_ERROR([*** selinux support requested but libraries not found])
131 fi
132 fi
133 AM_CONDITIONAL(HAVE_SELINUX, [test "$have_selinux" = "yes"])
134
135 AC_ARG_ENABLE([tcpwrap],
136 AS_HELP_STRING([--disable-tcpwrap],[Disable optional TCP wrappers support]),
137 [case "${enableval}" in
138 yes) have_tcpwrap=yes ;;
139 no) have_tcpwrap=no ;;
140 *) AC_MSG_ERROR(bad value ${enableval} for --disable-tcpwrap) ;;
141 esac],
142 [have_tcpwrap=auto])
143
144 if test "x${have_tcpwrap}" != xno ; then
145 ACX_LIBWRAP
146 if test "x${LIBWRAP_LIBS}" = x ; then
147 if test "x$have_tcpwrap" = xyes ; then
148 AC_MSG_ERROR([*** TCP wrappers support not found.])
149 fi
150 have_tcpwrap=no
151 else
152 have_tcpwrap=yes
153 fi
154 else
155 LIBWRAP_LIBS=
156 fi
157 AC_SUBST(LIBWRAP_LIBS)
158
159 AC_ARG_ENABLE([pam],
160 AS_HELP_STRING([--disable-pam],[Disable optional PAM support]),
161 [case "${enableval}" in
162 yes) have_pam=yes ;;
163 no) have_pam=no ;;
164 *) AC_MSG_ERROR(bad value ${enableval} for --disable-pam) ;;
165 esac],
166 [have_pam=auto])
167
168 if test "x${have_pam}" != xno ; then
169 AC_CHECK_HEADERS(
170 [security/pam_modules.h security/pam_modutil.h security/pam_ext.h],
171 [have_pam=yes],
172 [if test "x$have_pam" = xyes ; then
173 AC_MSG_ERROR([*** PAM headers not found.])
174 fi])
175
176 AC_CHECK_LIB(
177 [pam],
178 [pam_syslog],
179 [have_pam=yes],
180 [if test "x$have_pam" = xyes ; then
181 AC_MSG_ERROR([*** libpam not found.])
182 fi])
183
184 if test "x$have_pam" = xyes ; then
185 PAM_LIBS="-lpam -lpam_misc"
186 AC_DEFINE(HAVE_PAM, 1, [PAM available])
187 else
188 have_pam=no
189 fi
190 else
191 PAM_LIBS=
192 fi
193 AC_SUBST(PAM_LIBS)
194 AM_CONDITIONAL([HAVE_PAM], [test "x$have_pam" != xno])
195
196 AC_ARG_ENABLE([audit],
197 AS_HELP_STRING([--disable-audit],[Disable optional AUDIT support]),
198 [case "${enableval}" in
199 yes) have_audit=yes ;;
200 no) have_audit=no ;;
201 *) AC_MSG_ERROR(bad value ${enableval} for --disable-audit) ;;
202 esac],
203 [have_audit=auto])
204
205 if test "x${have_audit}" != xno ; then
206 AC_CHECK_HEADERS(
207 [libaudit.h],
208 [have_audit=yes],
209 [if test "x$have_audit" = xyes ; then
210 AC_MSG_ERROR([*** AUDIT headers not found.])
211 fi])
212
213 AC_CHECK_LIB(
214 [audit],
215 [audit_open],
216 [have_audit=yes],
217 [if test "x$have_audit" = xyes ; then
218 AC_MSG_ERROR([*** libaudit not found.])
219 fi])
220
221 if test "x$have_audit" = xyes ; then
222 AUDIT_LIBS="-laudit"
223 AC_DEFINE(HAVE_AUDIT, 1, [AUDIT available])
224 else
225 have_audit=no
226 fi
227 else
228 AUDIT_LIBS=
229 fi
230 AC_SUBST(AUDIT_LIBS)
231
232 have_gtk=no
233 AC_ARG_ENABLE(gtk, AS_HELP_STRING([--disable-gtk], [disable GTK tools]))
234 if test "x$enable_gtk" != "xno"; then
235 PKG_CHECK_MODULES(GTK, [ gtk+-2.0 gio-unix-2.0 libnotify ],
236 [AC_DEFINE(HAVE_GTK, 1, [Define if GTK is available]) have_gtk=yes], have_gtk=no)
237 AC_SUBST(GTK_CFLAGS)
238 AC_SUBST(GTK_LIBS)
239 if test "x$have_gtk" = xno -a "x$enable_gtk" = xyes; then
240 AC_MSG_ERROR([*** gtk support requested but libraries not found])
241 fi
242 fi
243 AM_CONDITIONAL(HAVE_GTK, [test "$have_gtk" = "yes"])
244
245 AM_PROG_VALAC([0.9])
246 AC_SUBST(VAPIDIR)
247 AM_CONDITIONAL(HAVE_VALAC, test x"$VALAC" != x)
248
249 AC_PATH_PROG([XSLTPROC], [xsltproc])
250 AM_CONDITIONAL(HAVE_XSLTPROC, test x"$XSLTPROC" != x)
251
252 AC_PATH_PROG([M4], [m4])
253
254 AC_ARG_WITH(distro, AS_HELP_STRING([--with-distro=DISTRO],[Specify the distribution to target: One of fedora, suse, debian, arch, gentoo, slackware or other]))
255 if test "z$with_distro" = "z"; then
256 if test "$cross_compiling" = yes; then
257 AC_MSG_WARN([Target distribution cannot be reliably detected when cross-compiling. You should specify it with --with-distro (see $0 --help for recognized distros)])
258 else
259 AC_CHECK_FILE(/etc/redhat-release,with_distro="fedora")
260 AC_CHECK_FILE(/etc/SuSE-release,with_distro="suse")
261 AC_CHECK_FILE(/etc/debian_version,with_distro="debian")
262 AC_CHECK_FILE(/etc/arch-release,with_distro="arch")
263 AC_CHECK_FILE(/etc/gentoo-release,with_distro="gentoo")
264 AC_CHECK_FILE(/etc/slackware-version,with_distro="slackware")
265 fi
266 if test "z$with_distro" = "z"; then
267 with_distro=`uname -s`
268 fi
269 fi
270 with_distro=`echo ${with_distro} | tr '[[:upper:]]' '[[:lower:]]' `
271 AC_DEFINE_UNQUOTED(DISTRIBUTION, ["${with_distro}"], [Target Distribution])
272
273 # Default generic names
274 SPECIAL_SYSLOG_SERVICE=syslog.service
275
276 # Location of the init scripts as mandated by LSB
277 SYSTEM_SYSVINIT_PATH=/etc/init.d
278
279 M4_DISTRO_FLAG=
280
281 case $with_distro in
282 fedora)
283 SYSTEM_SYSVINIT_PATH=/etc/rc.d/init.d
284 SYSTEM_SYSVRCND_PATH=/etc/rc.d
285
286 # A little background why we define this special unit
287 # names here in configure.ac: SysV services currently
288 # cannot have aliases. As long as syslog is started
289 # via a SysV init script we hence define this name to
290 # the actual SysV name here. Later on when SysV init
291 # scripts are not used anymore it is advisable to use
292 # the generic name instead and use symlinks in the
293 # unit directories to point to the right native unit
294 # file.
295
296 SPECIAL_SYSLOG_SERVICE=rsyslog.service
297 AC_DEFINE(TARGET_FEDORA, [], [Target is Fedora/RHEL])
298 M4_DISTRO_FLAG=-DTARGET_FEDORA=1
299 ;;
300 suse)
301 SYSTEM_SYSVRCND_PATH=/etc/init.d
302 AC_DEFINE(TARGET_SUSE, [], [Target is openSUSE/SLE])
303 M4_DISTRO_FLAG=-DTARGET_SUSE=1
304 ;;
305 debian)
306 SYSTEM_SYSVRCND_PATH=/etc
307 SPECIAL_SYSLOG_SERVICE=rsyslog.service
308 AC_DEFINE(TARGET_DEBIAN, [], [Target is Debian/Ubuntu])
309 M4_DISTRO_FLAG=-DTARGET_DEBIAN=1
310 ;;
311 arch)
312 SYSTEM_SYSVINIT_PATH=/etc/rc.d
313 SYSTEM_SYSVRCND_PATH=/etc
314 SPECIAL_SYSLOG_SERVICE=syslog-ng.service
315 AC_DEFINE(TARGET_ARCH, [], [Target is ArchLinux])
316 M4_DISTRO_FLAG=-DTARGET_ARCH=1
317 ;;
318 gentoo)
319 SYSTEM_SYSVINIT_PATH=
320 SYSTEM_SYSVRCND_PATH=
321 SPECIAL_SYSLOG_SERVICE=syslog-ng.service
322 AC_DEFINE(TARGET_GENTOO, [], [Target is Gentoo])
323 M4_DISTRO_FLAG=-DTARGET_GENTOO=1
324 ;;
325 slackware)
326 SYSTEM_SYSVINIT_PATH=/etc/rc.d/init.d
327 SYSTEM_SYSVRCND_PATH=/etc/rc.d
328 AC_DEFINE(TARGET_SLACKWARE, [], [Target is Slackware])
329 M4_DISTRO_FLAG=-DTARGET_SLACKWARE=1
330 ;;
331 other)
332 AS_IF([test "x$with_syslog_service" = "x"],
333 [AC_MSG_ERROR([With --distro=other, you must pass --with-syslog-service= to configure])])
334 ;;
335 *)
336 AC_MSG_ERROR([Your distribution (${with_distro}) is not yet supported, SysV init scripts could not be found! (patches welcome); you can specify --with-distro=other to skip this check])
337 ;;
338 esac
339
340 AC_ARG_WITH([sysvinit-path],
341 [AS_HELP_STRING([--with-sysvinit-path=PATH],
342 [Specify the path to where the SysV init scripts are located @<:@default=based on distro@:>@])],
343 [SYSTEM_SYSVINIT_PATH="$withval"],
344 [])
345
346 AC_ARG_WITH([sysvrcd-path],
347 [AS_HELP_STRING([--with-sysvrcd-path=PATH],
348 [Specify the path to the base directory for the SysV rcN.d directories @<:@default=based on distro@:>@])],
349 [SYSTEM_SYSVRCND_PATH="$withval"],
350 [])
351
352 AC_ARG_WITH([syslog-service],
353 [AS_HELP_STRING([--with-syslog-service=UNIT],
354 [Specify the name of the special syslog service @<:@default=based on distro@:>@])],
355 [SPECIAL_SYSLOG_SERVICE="$withval"],
356 [])
357
358 AC_SUBST(SYSTEM_SYSVINIT_PATH)
359 AC_SUBST(SYSTEM_SYSVRCND_PATH)
360 AC_SUBST(SPECIAL_SYSLOG_SERVICE)
361 AC_SUBST(M4_DISTRO_FLAG)
362
363 if test "x${SYSTEM_SYSVINIT_PATH}" != "x" -a "x${SYSTEM_SYSVRCND_PATH}" != "x"; then
364 AC_DEFINE(HAVE_SYSV_COMPAT, [], [SysV init scripts and rcN.d links are supported.])
365 SYSTEM_SYSV_COMPAT="yes"
366 elif test "x${SYSTEM_SYSVINIT_PATH}" != "x" -o "x${SYSTEM_SYSVRCND_PATH}" != "x"; then
367 AC_MSG_ERROR([*** You need both --with-sysvinit-path=PATH and --with-sysvrcd-path=PATH to enable SysV compatibility support, or both empty to disable it.])
368 else
369 SYSTEM_SYSV_COMPAT="no"
370 fi
371
372 AM_CONDITIONAL(TARGET_FEDORA, test x"$with_distro" = xfedora)
373 AM_CONDITIONAL(TARGET_SUSE, test x"$with_distro" = xsuse)
374 AM_CONDITIONAL(TARGET_DEBIAN, test x"$with_distro" = xdebian)
375 AM_CONDITIONAL(TARGET_ARCH, test x"$with_distro" = xarch)
376 AM_CONDITIONAL(TARGET_GENTOO, test x"$with_distro" = xgentoo)
377 AM_CONDITIONAL(TARGET_SLACKWARE, test x"$with_distro" = xslackware)
378
379 AC_DEFINE_UNQUOTED(SPECIAL_SYSLOG_SERVICE, ["$SPECIAL_SYSLOG_SERVICE"], [Syslog service name])
380
381 AC_ARG_WITH([dbuspolicydir],
382 AS_HELP_STRING([--with-dbuspolicydir=DIR], [D-Bus policy directory]),
383 [],
384 [with_dbuspolicydir=`pkg-config --variable=sysconfdir dbus-1`/dbus-1/system.d])
385
386 AC_ARG_WITH([dbussessionservicedir],
387 AS_HELP_STRING([--with-dbussessionservicedir=DIR], [D-Bus session service directory]),
388 [],
389 [with_dbussessionservicedir=`pkg-config --variable=session_bus_services_dir dbus-1`])
390
391 AC_ARG_WITH([dbussystemservicedir],
392 AS_HELP_STRING([--with-dbussystemservicedir=DIR], [D-Bus system service directory]),
393 [],
394 [with_dbussystemservicedir=`pkg-config --variable=session_bus_services_dir dbus-1`/../system-services])
395
396 AC_ARG_WITH([dbusinterfacedir],
397 AS_HELP_STRING([--with-dbusinterfacedir=DIR], [D-Bus interface directory]),
398 [],
399 [with_dbusinterfacedir=`pkg-config --variable=session_bus_services_dir dbus-1`/../interfaces])
400
401 AC_ARG_WITH([udevrulesdir],
402 AS_HELP_STRING([--with-udevrulesdir=DIR], [Diectory for udev rules]),
403 [],
404 [with_udevrulesdir=`pkg-config --variable=udevdir udev`/rules.d])
405
406 AC_ARG_WITH([pamlibdir],
407 AS_HELP_STRING([--with-pamlibdir=DIR], [Diectory for PAM modules]),
408 [],
409 [with_pamlibdir=/lib/`$CC -print-multi-os-directory`/security])
410
411 AC_ARG_WITH([rootdir],
412 AS_HELP_STRING([--with-rootdir=DIR], [Root directory for files necessary for boot]),
413 [],
414 [with_rootdir=${ac_default_prefix}])
415
416 AC_SUBST([dbuspolicydir], [$with_dbuspolicydir])
417 AC_SUBST([dbussessionservicedir], [$with_dbussessionservicedir])
418 AC_SUBST([dbussystemservicedir], [$with_dbussystemservicedir])
419 AC_SUBST([dbusinterfacedir], [$with_dbusinterfacedir])
420 AC_SUBST([udevrulesdir], [$with_udevrulesdir])
421 AC_SUBST([pamlibdir], [$with_pamlibdir])
422 AC_SUBST([rootdir], [$with_rootdir])
423
424 AC_CONFIG_FILES([Makefile])
425 AC_OUTPUT
426
427 echo "
428 $PACKAGE_NAME $VERSION
429
430 Distribution: ${with_distro}
431 SysV compatibility: ${SYSTEM_SYSV_COMPAT}
432 SysV init scripts: ${SYSTEM_SYSVINIT_PATH}
433 SysV rc?.d directories: ${SYSTEM_SYSVRCND_PATH}
434 Syslog service: ${SPECIAL_SYSLOG_SERVICE}
435 Gtk: ${have_gtk}
436 tcpwrap: ${have_tcpwrap}
437 PAM: ${have_pam}
438 AUDIT: ${have_audit}
439 SELinux: ${have_selinux}
440 prefix: ${prefix}
441 root dir: ${with_rootdir}
442 udev rules dir: ${with_udevrulesdir}
443 pam modules dir: ${with_pamlibdir}
444 dbus policy dir: ${with_dbuspolicydir}
445 dbus session dir: ${with_dbussessionservicedir}
446 dbus system dir: ${with_dbussystemservicedir}
447 dbus interfaces dir: ${with_dbusinterfacedir}
448 "