Add support for hppa/PA-RISC architecture
[urcu.git] / configure.ac
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1# -*- Autoconf -*-
2# Process this file with autoconf to produce a configure script.
3
4
ca617caf 5AC_INIT([userspace-rcu],[0.8.0],[mathieu dot desnoyers at efficios dot com])
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6
7# Following the numbering scheme proposed by libtool for the library version
8# http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
45e60038 9AC_SUBST([URCU_LIBRARY_VERSION], [3:0:0])
98bc124a 10
48d848c7 11AC_CONFIG_AUX_DIR([config])
a6412536 12AC_CONFIG_MACRO_DIR([config])
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13AC_CANONICAL_TARGET
14AC_CANONICAL_HOST
48d848c7 15AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip])
35eb2d6c 16AM_MAINTAINER_MODE([enable])
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17m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
18
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19m4_include([config/ax_tls.m4])
20
48d848c7 21AC_CONFIG_SRCDIR([urcu.h])
7d413817 22
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23AC_CONFIG_HEADERS([config.h urcu/config.h])
24
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25AH_TEMPLATE([CONFIG_RCU_SMP], [Enable SMP support. With SMP support enabled, uniprocessors are also supported. With SMP support disabled, UP systems work fine, but the behavior of SMP systems is undefined.])
26AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.])
27AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.])
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28AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.])
29AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.])
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30AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.])
31
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32# Allow overriding storage used for TLS variables.
33AC_ARG_ENABLE([compiler-tls],
34 AS_HELP_STRING([--disable-compiler-tls], [Use pthread_getspecific() to emulate Thread Local Storage (TLS) variables.]),
35 [def_compiler_tls=$enableval],
36 [def_compiler_tls="yes"])
37
38# If not overridden, use ax_tls.m4 to check if TLS is available.
39AS_IF([test "x$def_compiler_tls" = "xyes"],
40 [AX_TLS([def_tls_detect=$ac_cv_tls], [:])],
41 [:])
42
43AS_IF([test "x$def_tls_detect" = "x"],
44 [:],
45 [AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $def_tls_detect)])
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46
47# Checks for programs.
48AC_PROG_CC
49AC_PROG_MAKE_SET
b14a378a 50LT_INIT
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51
52# Checks for typedefs, structures, and compiler characteristics.
53AC_C_INLINE
54AC_TYPE_PID_T
55AC_TYPE_SIZE_T
56
57# Checks for library functions.
58AC_FUNC_MALLOC
59AC_FUNC_MMAP
6bbcdc42 60AC_CHECK_FUNCS([bzero gettimeofday munmap sched_getcpu strtoul sysconf gettid])
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61
62# Find arch type
58e9f838 63AS_CASE([$host_cpu],
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64 [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"],
65 [i486], [ARCHTYPE="x86"],
66 [i586], [ARCHTYPE="x86"],
67 [i686], [ARCHTYPE="x86"],
68 [amd64], [ARCHTYPE="x86"],
69 [x86_64], [ARCHTYPE="x86"],
70 [powerpc], [ARCHTYPE="ppc"],
71 [ppc64], [ARCHTYPE="ppc"],
72 [powerpc64], [ARCHTYPE="ppc"],
3913336f 73 [powerpc64le], [ARCHTYPE="gcc"],
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74 [ppc], [ARCHTYPE="ppc"],
75 [s390], [ARCHTYPE="s390"],
76 [s390x], [ARCHTYPE="s390"],
171ff3a3 77 [sparc], [ARCHTYPE="sparc64"],
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78 [sparc64], [ARCHTYPE="sparc64"],
79 [alpha*], [ARCHTYPE="alpha"],
80 [ia64], [ARCHTYPE="gcc"],
81 [arm*], [ARCHTYPE="arm"],
3913336f 82 [aarch64], [ARCHTYPE="gcc"],
e1259cb1 83 [mips*], [ARCHTYPE="mips"],
274773cf 84 [tile*], [ARCHTYPE="gcc"],
13e0bc72 85 [hppa*], [ARCHTYPE="hppa"],
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86 [ARCHTYPE="unknown"]
87)
91b0650a 88
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89AS_CASE([$host],[*-*-linux-androideabi],
90 [AM_CONDITIONAL(TARGET_IS_ANDROID, true)],
91 [AM_CONDITIONAL(TARGET_IS_ANDROID, false)]
92)
93
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94AC_SUBST(ARCHTYPE)
95AC_SUBST(SUBARCHTYPE)
5e626e0e 96
a2e7bf9c 97UATOMICSRC=urcu/uatomic/$ARCHTYPE.h
1b9119f8 98ARCHSRC=urcu/arch/$ARCHTYPE.h
455b809a 99
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100AS_IF([test "x$SUBARCHTYPE" = xx86compat],[
101 AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1])
102])
103
58e9f838 104AS_IF([test "$host_cpu" = "armv7l"],[
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105 CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1"
106])
48d848c7 107
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108# ARM-specific checks
109AS_IF([test "x$ARCHTYPE" = "xarm"],[
110 AC_MSG_CHECKING([for dmb instruction])
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111 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
112 int main()
113 {
114 asm volatile("dmb":::"memory");
115 return 0;
116 }
117 ]])
118 ],[
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119 AC_MSG_RESULT([yes])
120 AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1])
121 ],[
122 AC_MSG_RESULT([no])
123 ])
124])
125
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126# Tile-specific checks
127AS_IF([echo "$host_cpu" | grep "^tile"],[
128 AC_MSG_CHECKING([for Tile architecture type])
129 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
130 #ifndef __tilegx__
131 #error
132 #endif
133 ]])
134 ],[
135 AC_MSG_RESULT([ok])
136 ],[
137 AC_MSG_FAILURE([URCU has only been tested on the TileGx architecture. For other Tile* architectures, please run the tests first and report the results to the maintainer so that proper support can be added.])
138 ])
139])
140
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141# x86-specific checks
142AS_IF([test "x$ARCHTYPE" = "xx86"],[
143 AC_MSG_CHECKING([if architecture really supports the mfence instruction])
144 #For now, using lock; addl compatibility mode even for i686, because the
145 #Pentium III is seen as a i686, but lacks mfence instruction.
146 #Only using fence for x86_64.
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147 #
148 #k1om is the name for the Intel MIC family (Xeon Phi). It is an x86_64
149 #variant but lacks fence instructions.
150 AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686" -a "x$host_vendor" != "xk1om"],[
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151 AC_MSG_RESULT([yes])
152 AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1])
153 ],[
154 AC_MSG_RESULT([no])
155 ])
156])
157
158# Check if sys_futex() is available
159AC_MSG_CHECKING([for sys_futex()])
fe0707ab 160AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
a6412536 161 #include <sys/syscall.h>
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162 #ifndef __NR_futex
163 #error "futexes not available"
164 #endif
fe0707ab 165 ]])
a6412536 166],[
0854ccff 167 AC_MSG_RESULT([yes])
02be5561 168 AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1])
0854ccff 169 compat_futex_test=0
91b0650a 170],[
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171 AC_MSG_RESULT([no])
172 compat_futex_test=1
91b0650a 173])
0854ccff 174
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175# Check for pthread
176AC_CHECK_LIB([pthread], [pthread_create],
177 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, false)],
178 [AC_CHECK_LIB([c], [pthread_create],
179 [AM_CONDITIONAL(LIBC_INCLUDES_PTHREAD, true)],
180 [AC_MSG_ERROR([Cannot find libpthread. Use [LDFLAGS]=-Ldir to specify its location.])]
181 )]
182)
183
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184AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"])
185AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"])
2f49a496 186AM_CONDITIONAL([NO_SHARED], [test "x$enable_shared" = "xno"])
0854ccff 187
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188# smp-support configure option
189AC_ARG_ENABLE([smp-support],
190 AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]),
191 [def_smp_support=$enableval],
192 [def_smp_support="yes"])
193AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])])
7d413817 194
48d848c7 195
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196# From the sched_setaffinity(2)'s man page:
197# ~~~~
198# The CPU affinity system calls were introduced in Linux kernel 2.5.8.
199# The library interfaces were introduced in glibc 2.3. Initially, the
200# glibc interfaces included a cpusetsize argument. In glibc 2.3.3,
201# the cpuset size argument was removed, but this argument was
202# restored in glibc 2.3.4.
203# ~~~~
204
205# In addition to that, some vendors ported the system call to 2.4
206# kernels.
207
208# Furthermore, when the function first appeared, the MASK argument was
209# an unsigned long pointer, while later it was made into a cpu_set_t
210# pointer. Systems that have the cpu_set_t version also should have
211# the CPU_ZERO, CPU_SET, etc. macros.
212
213# All this mess means we have to cater for at least 3 different
214# sched_setaffinity prototypes:
215
216# ~~~~
217# int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask);
218# int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset);
219# int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask);
220# ~~~~
221
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222# Since we define _GNU_SOURCE in the sources, must do so too in the
223# autoconf tests, as defining _GNU_SOURCE or not exposes
224# sched_setaffinity bits differently.
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225saved_CFLAGS=$CFLAGS
226CFLAGS="$CFLAGS -D_GNU_SOURCE"
227
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228AC_CHECK_TYPES([cpu_set_t],
229 [have_cpu_set_t="yes"],
230 [have_cpu_set_t="no"],
231 [#include <sched.h>])
232
233# Confirm that we have CPU_ZERO, and it actually works.
234AC_MSG_CHECKING([whether CPU_ZERO works])
235AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works])
236AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
237 #define _GNU_SOURCE
238 #include <sched.h>
239 int main()
240 {
241 cpu_set_t foo; CPU_ZERO(&foo);
242 return 0;
243 }
244 ]])
245],[
246 AC_DEFINE(HAVE_CPU_ZERO, 1)
247 AC_MSG_RESULT([yes])
248],[
249 AC_MSG_RESULT([no])
250])
251
252# Confirm that we have CPU_SET, and it actually works.
253AC_MSG_CHECKING([whether CPU_SET works])
254AH_TEMPLATE([HAVE_CPU_SET], [Defined to 1 if we have CPU_SET and it works])
255AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
256 #define _GNU_SOURCE
257 #include <sched.h>
258 int main()
259 {
260 cpu_set_t foo, mask; CPU_SET(0, &foo);
261 return 0;
262 }
263 ]])
264],[
265 AC_DEFINE(HAVE_CPU_SET, 1)
266 AC_MSG_RESULT([yes])
267],[
268 AC_MSG_RESULT([no])
269])
270
d8540fc5 271# First check if the function is available at all.
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272AC_CHECK_FUNCS([sched_setaffinity],[
273 # Okay, we have it. Check if also have cpu_set_t. If we don't,
274 # then we have the first version using unsigned long, and no
275 # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the
276 # version with 2 or 3 arguments. In that case, CPU_ZERO, etc.,
277 # should also be present, but we confirm nonetheless.
278
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279 AS_IF([test "x$have_cpu_set_t" = "xyes"], [
280 # We do have it.
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281 # Check how many arguments does sched_setaffinity take.
282 # Should be 3 or 2.
283 AC_MSG_CHECKING([how many arguments sched_setaffinity takes])
ec5e2d14 284 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
a6412536 285 #include <sched.h>
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286 int main()
287 {
288 cpu_set_t foo;
b3231c17 289 sched_setaffinity(0, sizeof (foo), &foo);
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290 return 0;
291 }
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292 ]])
293 ],
294 [sched_set_affinity_args=3],
295 [sched_set_affinity_args=2])
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296 AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS,
297 $sched_set_affinity_args,
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298 [Defined to sched_setaffinity's number of arguments.])
299 AC_MSG_RESULT([$sched_set_affinity_args])
300 ],[
301 # No cpu_set_t, always 3 args.
302 AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3)
b3231c17 303 ])
a6412536 304])
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305
306CFLAGS=$saved_CFLAGS
307
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308AC_CONFIG_LINKS([
309 urcu/arch.h:$ARCHSRC
a2e7bf9c 310 urcu/uatomic.h:$UATOMICSRC
455b809a 311])
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312AC_CONFIG_FILES([
313 Makefile
fe999c05 314 doc/Makefile
8bad63a0 315 doc/examples/Makefile
48d848c7 316 tests/Makefile
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317 tests/common/Makefile
318 tests/unit/Makefile
319 tests/benchmark/Makefile
320 tests/regression/Makefile
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321 liburcu.pc
322 liburcu-bp.pc
a6412536 323 liburcu-cds.pc
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324 liburcu-qsbr.pc
325 liburcu-mb.pc
326 liburcu-signal.pc
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327])
328AC_OUTPUT
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329
330# Report on selected configure options
331AS_IF([test "x$def_smp_support" = "xyes"],[
332 AS_ECHO("SMP support enabled.")
333],[
334 AS_ECHO("SMP support disabled.")
335])
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336
337AS_IF([test "x$def_tls_detect" = "x"],[
338 AS_ECHO("Thread Local Storage (TLS): pthread_getspecific().")
339],[
340 AS_ECHO("Thread Local Storage (TLS): $def_tls_detect.")
341])
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