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48d848c7 PMF |
1 | # -*- Autoconf -*- |
2 | # Process this file with autoconf to produce a configure script. | |
3 | ||
4 | ||
91b0650a | 5 | AC_INIT([userspace-rcu],[0.6.6],[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 | |
91b0650a | 33 | LT_INIT |
48d848c7 PMF |
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 $host_cpu in |
7d413817 | 47 | i386) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;; |
bf9de1b7 MD |
48 | i486) ARCHTYPE="x86";; |
49 | i586) ARCHTYPE="x86";; | |
50 | i686) ARCHTYPE="x86";; | |
2c612a55 | 51 | amd64) ARCHTYPE="x86";; |
48d848c7 | 52 | x86_64) ARCHTYPE="x86";; |
48d848c7 PMF |
53 | powerpc) ARCHTYPE="ppc" ;; |
54 | ppc64) ARCHTYPE="ppc" ;; | |
7d413817 | 55 | powerpc64) ARCHTYPE="ppc" ;; |
48d848c7 PMF |
56 | ppc) ARCHTYPE="ppc" ;; |
57 | s390) ARCHTYPE="s390" ;; | |
58 | s390x) ARCHTYPE="s390" ;; | |
c0a68bfa | 59 | sparc64) ARCHTYPE="sparc64" ;; |
6f9d9b49 | 60 | alpha*) ARCHTYPE="alpha" ;; |
ca5a03db | 61 | ia64) ARCHTYPE="gcc" ;; |
93af08d9 | 62 | arm*) ARCHTYPE="arm" ;; |
48d848c7 PMF |
63 | *) ARCHTYPE="unknown";; |
64 | esac | |
65 | ||
5e626e0e JW |
66 | if test "x$ARCHTYPE" = "xarm" ; then |
67 | AC_MSG_CHECKING([checking for dmb instruction]) | |
91b0650a MD |
68 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ |
69 | ]], [[ | |
5e626e0e | 70 | asm volatile("dmb":::"memory"); |
91b0650a | 71 | ]])],[ |
5e626e0e | 72 | AC_MSG_RESULT([yes]) |
e95ee429 | 73 | AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1]) |
91b0650a MD |
74 | |
75 | ],[ | |
5e626e0e | 76 | AC_MSG_RESULT([no]) |
91b0650a MD |
77 | |
78 | ]) | |
5e626e0e JW |
79 | fi |
80 | ||
a2e7bf9c | 81 | UATOMICSRC=urcu/uatomic/$ARCHTYPE.h |
1b9119f8 | 82 | ARCHSRC=urcu/arch/$ARCHTYPE.h |
fdbddd0b PM |
83 | if test "$ARCHTYPE" == "armv7l"; then |
84 | CFLAGS="-mcpu=cortex-a9 -mtune=cortex-a9 -O" | |
85 | fi | |
455b809a | 86 | |
48d848c7 | 87 | AC_SUBST(ARCHTYPE) |
7d413817 | 88 | AC_SUBST(SUBARCHTYPE) |
48d848c7 | 89 | |
90586875 | 90 | [ |
c5b9f8ff | 91 | #if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586"; then |
6cb4ed53 MD |
92 | #For now, using lock; addl compatibility mode even for i686, because the |
93 | #Pentium III is seen as a i686, but lacks mfence instruction. | |
94 | #Only using fence for x86_64. | |
c5b9f8ff | 95 | if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686"; then |
90586875 | 96 | ] |
02be5561 | 97 | AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1]) |
90586875 MD |
98 | [ |
99 | fi | |
100 | ] | |
101 | ||
49617de1 | 102 | AC_MSG_CHECKING([sys_futex()]) |
91b0650a | 103 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ |
0854ccff | 104 | #include <sys/syscall.h> |
91b0650a | 105 | ]], [[ |
0854ccff MD |
106 | #ifndef __NR_futex |
107 | #error "futexes not available" | |
108 | #endif | |
91b0650a | 109 | ]])],[ |
0854ccff | 110 | AC_MSG_RESULT([yes]) |
02be5561 | 111 | AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1]) |
0854ccff | 112 | compat_futex_test=0 |
91b0650a MD |
113 | |
114 | ],[ | |
0854ccff MD |
115 | AC_MSG_RESULT([no]) |
116 | compat_futex_test=1 | |
91b0650a MD |
117 | |
118 | ]) | |
0854ccff MD |
119 | |
120 | AM_CONDITIONAL([COMPAT_FUTEX], [ test "x$compat_futex_test" = "x1" ]) | |
121 | ||
0854ccff | 122 | AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = xx86compat ]) |
7d413817 | 123 | |
bf9de1b7 MD |
124 | [ |
125 | if test "x$SUBARCHTYPE" = xx86compat; then | |
126 | ] | |
02be5561 | 127 | AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1]) |
bf9de1b7 MD |
128 | [ |
129 | fi | |
130 | ] | |
131 | ||
7d413817 MD |
132 | AC_ARG_ENABLE([smp-support], [ --disable-smp-support Disable SMP support. Warning: only use this |
133 | on uniprocessor systems. [[default=enabled]]], [def_smp_support=$enableval], [def_smp_support="yes"]) | |
134 | ||
135 | [ | |
136 | if test "$def_smp_support" = "no"; then | |
137 | echo "SMP support disabled." | |
138 | else | |
139 | ] | |
02be5561 | 140 | AC_DEFINE([CONFIG_RCU_SMP], [1]) |
7d413817 MD |
141 | [ |
142 | echo "SMP support enabled." | |
143 | fi | |
144 | ] | |
48d848c7 | 145 | |
d8540fc5 PA |
146 | # From the sched_setaffinity(2)'s man page: |
147 | # ~~~~ | |
148 | # The CPU affinity system calls were introduced in Linux kernel 2.5.8. | |
149 | # The library interfaces were introduced in glibc 2.3. Initially, the | |
150 | # glibc interfaces included a cpusetsize argument. In glibc 2.3.3, | |
151 | # the cpuset size argument was removed, but this argument was | |
152 | # restored in glibc 2.3.4. | |
153 | # ~~~~ | |
154 | ||
155 | # In addition to that, some vendors ported the system call to 2.4 | |
156 | # kernels. | |
157 | ||
158 | # Furthermore, when the function first appeared, the MASK argument was | |
159 | # an unsigned long pointer, while later it was made into a cpu_set_t | |
160 | # pointer. Systems that have the cpu_set_t version also should have | |
161 | # the CPU_ZERO, CPU_SET, etc. macros. | |
162 | ||
163 | # All this mess means we have to cater for at least 3 different | |
164 | # sched_setaffinity prototypes: | |
165 | ||
166 | # ~~~~ | |
167 | # int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask); | |
168 | # int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset); | |
169 | # int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask); | |
170 | # ~~~~ | |
171 | ||
172 | dnl Since we define _GNU_SOURCE in the sources, must do so too in the | |
173 | dnl autoconf tests, as defining _GNU_SOURCE or not exposes | |
174 | dnl sched_setaffinity bits differently. | |
175 | saved_CFLAGS=$CFLAGS | |
176 | CFLAGS="$CFLAGS -D_GNU_SOURCE" | |
177 | ||
178 | # First check if the function is available at all. | |
179 | AC_CHECK_FUNCS( | |
180 | [sched_setaffinity], | |
181 | [ # Okay, we have it. Check if also have cpu_set_t. If we don't, | |
182 | # then we have the first version using unsigned long, and no | |
183 | # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the | |
184 | # version with 2 or 3 arguments. In that case, CPU_ZERO, etc., | |
185 | # should also be present, but we confirm nonetheless. | |
186 | ||
187 | AC_CHECK_TYPES( | |
188 | [cpu_set_t], | |
189 | [ # We do have it. Confirm that we have CPU_ZERO, and it actually works. | |
190 | AC_MSG_CHECKING([whether CPU_ZERO works]) | |
191 | AH_TEMPLATE([HAVE_CPU_ZERO], | |
192 | [Define to 1 if we have CPU_ZERO and if it works]) | |
193 | AC_COMPILE_IFELSE( | |
194 | [AC_LANG_PROGRAM( | |
195 | [#define _GNU_SOURCE | |
196 | #include <sched.h>], | |
197 | [cpu_set_t foo; CPU_ZERO (&foo);]) | |
198 | ], | |
199 | [ # Works! | |
200 | AC_DEFINE(HAVE_CPU_ZERO, 1) | |
201 | AC_MSG_RESULT([yes]) | |
202 | ], | |
203 | [AC_MSG_RESULT([no])] | |
204 | ) | |
205 | ||
206 | # Check how many arguments does sched_setaffinity take. | |
207 | # Should be 3 or 2. | |
208 | AC_MSG_CHECKING([how many arguments sched_setaffinity takes]) | |
209 | AC_COMPILE_IFELSE( | |
210 | [AC_LANG_PROGRAM( | |
211 | [#include <sched.h>], | |
212 | [cpu_set_t foo; sched_setaffinity (0, sizeof (foo), &foo);]) | |
213 | ], | |
214 | [sched_set_affinity_args=3], | |
215 | [sched_set_affinity_args=2]) | |
216 | AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS, $sched_set_affinity_args, | |
217 | [Define to sched_setaffinity's number of arguments.]) | |
218 | AC_MSG_RESULT([$sched_set_affinity_args]) | |
219 | ], | |
220 | [ # No cpu_set_t, always 3 args. | |
221 | AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3) ], | |
222 | [#include <sched.h>] | |
223 | ) | |
224 | ] | |
225 | ) | |
226 | ||
227 | CFLAGS=$saved_CFLAGS | |
228 | ||
455b809a PB |
229 | AC_CONFIG_LINKS([ |
230 | urcu/arch.h:$ARCHSRC | |
a2e7bf9c | 231 | urcu/uatomic.h:$UATOMICSRC |
455b809a | 232 | ]) |
48d848c7 PMF |
233 | AC_CONFIG_FILES([ |
234 | Makefile | |
235 | tests/Makefile | |
fe670822 | 236 | liburcu-cds.pc |
2260a36c YB |
237 | liburcu.pc |
238 | liburcu-bp.pc | |
239 | liburcu-qsbr.pc | |
240 | liburcu-mb.pc | |
241 | liburcu-signal.pc | |
48d848c7 PMF |
242 | ]) |
243 | AC_OUTPUT |