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48d848c7 PMF |
1 | # -*- Autoconf -*- |
2 | # Process this file with autoconf to produce a configure script. | |
3 | ||
4 | ||
0830ec0d | 5 | AC_INIT([userspace-rcu], [0.6.0], [mathieu dot desnoyers at efficios dot com]) |
98bc124a YB |
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 | |
9 | AC_SUBST([URCU_LIBRARY_VERSION], [1:0:0]) | |
10 | ||
48d848c7 | 11 | AC_CONFIG_AUX_DIR([config]) |
7d413817 MD |
12 | AC_CANONICAL_TARGET |
13 | AC_CANONICAL_HOST | |
48d848c7 | 14 | AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip]) |
806f8114 PB |
15 | m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])]) |
16 | ||
48d848c7 | 17 | AC_CONFIG_SRCDIR([urcu.h]) |
0f4ac97f | 18 | AM_PROG_MKDIR_P |
7d413817 | 19 | |
e72596d1 MD |
20 | AC_CONFIG_HEADERS([config.h urcu/config.h]) |
21 | ||
22 | # Keep at the end to do not pollute installed header. | |
02be5561 MD |
23 | AH_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.]) |
24 | AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.]) | |
25 | AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.]) | |
26 | AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks | |
bf9de1b7 | 27 | cmpxchg instruction.]) |
e95ee429 | 28 | AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction is available for use on ARM.]) |
48d848c7 PMF |
29 | |
30 | # Checks for programs. | |
31 | AC_PROG_CC | |
32 | AC_PROG_MAKE_SET | |
33 | AC_PROG_LIBTOOL | |
34 | ||
35 | # Checks for typedefs, structures, and compiler characteristics. | |
36 | AC_C_INLINE | |
37 | AC_TYPE_PID_T | |
38 | AC_TYPE_SIZE_T | |
39 | ||
40 | # Checks for library functions. | |
41 | AC_FUNC_MALLOC | |
42 | AC_FUNC_MMAP | |
b57aee66 | 43 | AC_CHECK_FUNCS([bzero gettimeofday munmap sched_getcpu strtoul sysconf]) |
48d848c7 PMF |
44 | |
45 | # Find arch type | |
c5b9f8ff | 46 | case $host_cpu in |
7d413817 | 47 | i386) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;; |
bf9de1b7 MD |
48 | i486) ARCHTYPE="x86";; |
49 | i586) ARCHTYPE="x86";; | |
50 | i686) ARCHTYPE="x86";; | |
48d848c7 | 51 | x86_64) ARCHTYPE="x86";; |
48d848c7 PMF |
52 | powerpc) ARCHTYPE="ppc" ;; |
53 | ppc64) ARCHTYPE="ppc" ;; | |
7d413817 | 54 | powerpc64) ARCHTYPE="ppc" ;; |
48d848c7 PMF |
55 | ppc) ARCHTYPE="ppc" ;; |
56 | s390) ARCHTYPE="s390" ;; | |
57 | s390x) ARCHTYPE="s390" ;; | |
c0a68bfa | 58 | sparc64) ARCHTYPE="sparc64" ;; |
6f9d9b49 | 59 | alpha*) ARCHTYPE="alpha" ;; |
ca5a03db | 60 | ia64) ARCHTYPE="gcc" ;; |
93af08d9 | 61 | arm*) ARCHTYPE="arm" ;; |
48d848c7 PMF |
62 | *) ARCHTYPE="unknown";; |
63 | esac | |
64 | ||
5e626e0e JW |
65 | if test "x$ARCHTYPE" = "xarm" ; then |
66 | AC_MSG_CHECKING([checking for dmb instruction]) | |
67 | AC_TRY_COMPILE( | |
68 | [ | |
69 | ], | |
70 | [ | |
71 | asm volatile("dmb":::"memory"); | |
72 | ], | |
73 | [ | |
74 | AC_MSG_RESULT([yes]) | |
e95ee429 | 75 | AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1]) |
5e626e0e JW |
76 | ] |
77 | , | |
78 | [ | |
79 | AC_MSG_RESULT([no]) | |
80 | ] | |
81 | ) | |
82 | fi | |
83 | ||
a2e7bf9c | 84 | UATOMICSRC=urcu/uatomic/$ARCHTYPE.h |
1b9119f8 | 85 | ARCHSRC=urcu/arch/$ARCHTYPE.h |
455b809a PB |
86 | if test "x$ARCHTYPE" != xx86 -a "x$ARCHTYPE" != xppc; then |
87 | APISRC=tests/api_gcc.h | |
88 | else | |
89 | APISRC=tests/api_$ARCHTYPE.h | |
90 | fi | |
fdbddd0b PM |
91 | if test "$ARCHTYPE" == "armv7l"; then |
92 | CFLAGS="-mcpu=cortex-a9 -mtune=cortex-a9 -O" | |
93 | fi | |
455b809a | 94 | |
48d848c7 | 95 | AC_SUBST(ARCHTYPE) |
7d413817 | 96 | AC_SUBST(SUBARCHTYPE) |
48d848c7 | 97 | |
90586875 | 98 | [ |
c5b9f8ff | 99 | #if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586"; then |
6cb4ed53 MD |
100 | #For now, using lock; addl compatibility mode even for i686, because the |
101 | #Pentium III is seen as a i686, but lacks mfence instruction. | |
102 | #Only using fence for x86_64. | |
c5b9f8ff | 103 | if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686"; then |
90586875 | 104 | ] |
02be5561 | 105 | AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1]) |
90586875 MD |
106 | [ |
107 | fi | |
108 | ] | |
109 | ||
49617de1 | 110 | AC_MSG_CHECKING([sys_futex()]) |
0854ccff MD |
111 | AC_TRY_COMPILE( |
112 | [ | |
113 | #include <sys/syscall.h> | |
114 | ], | |
115 | [ | |
116 | #ifndef __NR_futex | |
117 | #error "futexes not available" | |
118 | #endif | |
119 | ], | |
120 | [ | |
121 | AC_MSG_RESULT([yes]) | |
02be5561 | 122 | AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1]) |
0854ccff MD |
123 | compat_futex_test=0 |
124 | ] | |
125 | , | |
126 | [ | |
127 | AC_MSG_RESULT([no]) | |
128 | compat_futex_test=1 | |
129 | ] | |
130 | ) | |
131 | ||
132 | AM_CONDITIONAL([COMPAT_FUTEX], [ test "x$compat_futex_test" = "x1" ]) | |
133 | ||
0854ccff | 134 | AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = xx86compat ]) |
7d413817 | 135 | |
bf9de1b7 MD |
136 | [ |
137 | if test "x$SUBARCHTYPE" = xx86compat; then | |
138 | ] | |
02be5561 | 139 | AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1]) |
bf9de1b7 MD |
140 | [ |
141 | fi | |
142 | ] | |
143 | ||
7d413817 MD |
144 | AC_ARG_ENABLE([smp-support], [ --disable-smp-support Disable SMP support. Warning: only use this |
145 | on uniprocessor systems. [[default=enabled]]], [def_smp_support=$enableval], [def_smp_support="yes"]) | |
146 | ||
147 | [ | |
148 | if test "$def_smp_support" = "no"; then | |
149 | echo "SMP support disabled." | |
150 | else | |
151 | ] | |
02be5561 | 152 | AC_DEFINE([CONFIG_RCU_SMP], [1]) |
7d413817 MD |
153 | [ |
154 | echo "SMP support enabled." | |
155 | fi | |
156 | ] | |
48d848c7 | 157 | |
d8540fc5 PA |
158 | # From the sched_setaffinity(2)'s man page: |
159 | # ~~~~ | |
160 | # The CPU affinity system calls were introduced in Linux kernel 2.5.8. | |
161 | # The library interfaces were introduced in glibc 2.3. Initially, the | |
162 | # glibc interfaces included a cpusetsize argument. In glibc 2.3.3, | |
163 | # the cpuset size argument was removed, but this argument was | |
164 | # restored in glibc 2.3.4. | |
165 | # ~~~~ | |
166 | ||
167 | # In addition to that, some vendors ported the system call to 2.4 | |
168 | # kernels. | |
169 | ||
170 | # Furthermore, when the function first appeared, the MASK argument was | |
171 | # an unsigned long pointer, while later it was made into a cpu_set_t | |
172 | # pointer. Systems that have the cpu_set_t version also should have | |
173 | # the CPU_ZERO, CPU_SET, etc. macros. | |
174 | ||
175 | # All this mess means we have to cater for at least 3 different | |
176 | # sched_setaffinity prototypes: | |
177 | ||
178 | # ~~~~ | |
179 | # int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask); | |
180 | # int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset); | |
181 | # int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask); | |
182 | # ~~~~ | |
183 | ||
184 | dnl Since we define _GNU_SOURCE in the sources, must do so too in the | |
185 | dnl autoconf tests, as defining _GNU_SOURCE or not exposes | |
186 | dnl sched_setaffinity bits differently. | |
187 | saved_CFLAGS=$CFLAGS | |
188 | CFLAGS="$CFLAGS -D_GNU_SOURCE" | |
189 | ||
190 | # First check if the function is available at all. | |
191 | AC_CHECK_FUNCS( | |
192 | [sched_setaffinity], | |
193 | [ # Okay, we have it. Check if also have cpu_set_t. If we don't, | |
194 | # then we have the first version using unsigned long, and no | |
195 | # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the | |
196 | # version with 2 or 3 arguments. In that case, CPU_ZERO, etc., | |
197 | # should also be present, but we confirm nonetheless. | |
198 | ||
199 | AC_CHECK_TYPES( | |
200 | [cpu_set_t], | |
201 | [ # We do have it. Confirm that we have CPU_ZERO, and it actually works. | |
202 | AC_MSG_CHECKING([whether CPU_ZERO works]) | |
203 | AH_TEMPLATE([HAVE_CPU_ZERO], | |
204 | [Define to 1 if we have CPU_ZERO and if it works]) | |
205 | AC_COMPILE_IFELSE( | |
206 | [AC_LANG_PROGRAM( | |
207 | [#define _GNU_SOURCE | |
208 | #include <sched.h>], | |
209 | [cpu_set_t foo; CPU_ZERO (&foo);]) | |
210 | ], | |
211 | [ # Works! | |
212 | AC_DEFINE(HAVE_CPU_ZERO, 1) | |
213 | AC_MSG_RESULT([yes]) | |
214 | ], | |
215 | [AC_MSG_RESULT([no])] | |
216 | ) | |
217 | ||
218 | # Check how many arguments does sched_setaffinity take. | |
219 | # Should be 3 or 2. | |
220 | AC_MSG_CHECKING([how many arguments sched_setaffinity takes]) | |
221 | AC_COMPILE_IFELSE( | |
222 | [AC_LANG_PROGRAM( | |
223 | [#include <sched.h>], | |
224 | [cpu_set_t foo; sched_setaffinity (0, sizeof (foo), &foo);]) | |
225 | ], | |
226 | [sched_set_affinity_args=3], | |
227 | [sched_set_affinity_args=2]) | |
228 | AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS, $sched_set_affinity_args, | |
229 | [Define to sched_setaffinity's number of arguments.]) | |
230 | AC_MSG_RESULT([$sched_set_affinity_args]) | |
231 | ], | |
232 | [ # No cpu_set_t, always 3 args. | |
233 | AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3) ], | |
234 | [#include <sched.h>] | |
235 | ) | |
236 | ] | |
237 | ) | |
238 | ||
239 | CFLAGS=$saved_CFLAGS | |
240 | ||
455b809a PB |
241 | AC_CONFIG_LINKS([ |
242 | urcu/arch.h:$ARCHSRC | |
a2e7bf9c | 243 | urcu/uatomic.h:$UATOMICSRC |
455b809a PB |
244 | tests/api.h:$APISRC |
245 | ]) | |
48d848c7 PMF |
246 | AC_CONFIG_FILES([ |
247 | Makefile | |
248 | tests/Makefile | |
fe670822 | 249 | liburcu-cds.pc |
2260a36c YB |
250 | liburcu.pc |
251 | liburcu-bp.pc | |
252 | liburcu-qsbr.pc | |
253 | liburcu-mb.pc | |
254 | liburcu-signal.pc | |
48d848c7 PMF |
255 | ]) |
256 | AC_OUTPUT |