Commit | Line | Data |
---|---|---|
48d848c7 PMF |
1 | # -*- Autoconf -*- |
2 | # Process this file with autoconf to produce a configure script. | |
3 | ||
4 | ||
3227f2cc | 5 | AC_INIT([userspace-rcu],[0.7.3],[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]) |
a6412536 | 12 | AC_CONFIG_MACRO_DIR([config]) |
7d413817 MD |
13 | AC_CANONICAL_TARGET |
14 | AC_CANONICAL_HOST | |
48d848c7 | 15 | AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip]) |
806f8114 PB |
16 | m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])]) |
17 | ||
a767fdc3 MD |
18 | m4_include([config/ax_tls.m4]) |
19 | ||
48d848c7 | 20 | AC_CONFIG_SRCDIR([urcu.h]) |
7d413817 | 21 | |
e72596d1 MD |
22 | AC_CONFIG_HEADERS([config.h urcu/config.h]) |
23 | ||
02be5561 MD |
24 | 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.]) |
25 | AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.]) | |
26 | AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.]) | |
a6412536 AM |
27 | AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.]) |
28 | AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.]) | |
a767fdc3 MD |
29 | AH_TEMPLATE([CONFIG_RCU_TLS], [TLS provided by the compiler.]) |
30 | ||
31 | AX_TLS([AC_DEFINE_UNQUOTED([CONFIG_RCU_TLS], $ac_cv_tls)], []) | |
48d848c7 PMF |
32 | |
33 | # Checks for programs. | |
34 | AC_PROG_CC | |
35 | AC_PROG_MAKE_SET | |
b14a378a | 36 | LT_INIT |
48d848c7 PMF |
37 | |
38 | # Checks for typedefs, structures, and compiler characteristics. | |
39 | AC_C_INLINE | |
40 | AC_TYPE_PID_T | |
41 | AC_TYPE_SIZE_T | |
42 | ||
43 | # Checks for library functions. | |
44 | AC_FUNC_MALLOC | |
45 | AC_FUNC_MMAP | |
b57aee66 | 46 | AC_CHECK_FUNCS([bzero gettimeofday munmap sched_getcpu strtoul sysconf]) |
48d848c7 PMF |
47 | |
48 | # Find arch type | |
a6412536 AM |
49 | AS_CASE([$host_cpu], |
50 | [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"], | |
51 | [i486], [ARCHTYPE="x86"], | |
52 | [i586], [ARCHTYPE="x86"], | |
53 | [i686], [ARCHTYPE="x86"], | |
54 | [amd64], [ARCHTYPE="x86"], | |
55 | [x86_64], [ARCHTYPE="x86"], | |
56 | [powerpc], [ARCHTYPE="ppc"], | |
57 | [ppc64], [ARCHTYPE="ppc"], | |
58 | [powerpc64], [ARCHTYPE="ppc"], | |
59 | [ppc], [ARCHTYPE="ppc"], | |
60 | [s390], [ARCHTYPE="s390"], | |
61 | [s390x], [ARCHTYPE="s390"], | |
62 | [sparc64], [ARCHTYPE="sparc64"], | |
63 | [alpha*], [ARCHTYPE="alpha"], | |
64 | [ia64], [ARCHTYPE="gcc"], | |
65 | [arm*], [ARCHTYPE="arm"], | |
66 | [ARCHTYPE="unknown"] | |
67 | ) | |
91b0650a | 68 | |
a6412536 AM |
69 | AC_SUBST(ARCHTYPE) |
70 | AC_SUBST(SUBARCHTYPE) | |
5e626e0e | 71 | |
a2e7bf9c | 72 | UATOMICSRC=urcu/uatomic/$ARCHTYPE.h |
1b9119f8 | 73 | ARCHSRC=urcu/arch/$ARCHTYPE.h |
455b809a | 74 | |
a6412536 AM |
75 | AS_IF([test "x$SUBARCHTYPE" = xx86compat],[ |
76 | AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1]) | |
77 | ]) | |
78 | ||
79 | AS_IF([test "$host_cpu" = "armv7l"],[ | |
80 | CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1" | |
81 | ]) | |
48d848c7 | 82 | |
a6412536 AM |
83 | # ARM-specific checks |
84 | AS_IF([test "x$ARCHTYPE" = "xarm"],[ | |
85 | AC_MSG_CHECKING([for dmb instruction]) | |
fe0707ab MD |
86 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ |
87 | int main() | |
88 | { | |
89 | asm volatile("dmb":::"memory"); | |
90 | return 0; | |
91 | } | |
92 | ]]) | |
93 | ],[ | |
a6412536 AM |
94 | AC_MSG_RESULT([yes]) |
95 | AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1]) | |
96 | ],[ | |
97 | AC_MSG_RESULT([no]) | |
98 | ]) | |
99 | ]) | |
100 | ||
101 | # x86-specific checks | |
102 | AS_IF([test "x$ARCHTYPE" = "xx86"],[ | |
103 | AC_MSG_CHECKING([if architecture really supports the mfence instruction]) | |
104 | #For now, using lock; addl compatibility mode even for i686, because the | |
105 | #Pentium III is seen as a i686, but lacks mfence instruction. | |
106 | #Only using fence for x86_64. | |
107 | AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686"],[ | |
108 | AC_MSG_RESULT([yes]) | |
109 | AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1]) | |
110 | ],[ | |
111 | AC_MSG_RESULT([no]) | |
112 | ]) | |
113 | ]) | |
114 | ||
115 | # Check if sys_futex() is available | |
116 | AC_MSG_CHECKING([for sys_futex()]) | |
fe0707ab | 117 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ |
a6412536 | 118 | #include <sys/syscall.h> |
a6412536 AM |
119 | #ifndef __NR_futex |
120 | #error "futexes not available" | |
121 | #endif | |
fe0707ab | 122 | ]]) |
a6412536 | 123 | ],[ |
0854ccff | 124 | AC_MSG_RESULT([yes]) |
02be5561 | 125 | AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1]) |
0854ccff | 126 | compat_futex_test=0 |
91b0650a | 127 | ],[ |
0854ccff MD |
128 | AC_MSG_RESULT([no]) |
129 | compat_futex_test=1 | |
91b0650a | 130 | ]) |
0854ccff | 131 | |
a6412536 AM |
132 | AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"]) |
133 | AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"]) | |
0854ccff | 134 | |
a6412536 AM |
135 | # smp-support configure option |
136 | AC_ARG_ENABLE([smp-support], | |
137 | AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]), | |
138 | [def_smp_support=$enableval], | |
139 | [def_smp_support="yes"]) | |
140 | AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])]) | |
7d413817 | 141 | |
48d848c7 | 142 | |
d8540fc5 PA |
143 | # From the sched_setaffinity(2)'s man page: |
144 | # ~~~~ | |
145 | # The CPU affinity system calls were introduced in Linux kernel 2.5.8. | |
146 | # The library interfaces were introduced in glibc 2.3. Initially, the | |
147 | # glibc interfaces included a cpusetsize argument. In glibc 2.3.3, | |
148 | # the cpuset size argument was removed, but this argument was | |
149 | # restored in glibc 2.3.4. | |
150 | # ~~~~ | |
151 | ||
152 | # In addition to that, some vendors ported the system call to 2.4 | |
153 | # kernels. | |
154 | ||
155 | # Furthermore, when the function first appeared, the MASK argument was | |
156 | # an unsigned long pointer, while later it was made into a cpu_set_t | |
157 | # pointer. Systems that have the cpu_set_t version also should have | |
158 | # the CPU_ZERO, CPU_SET, etc. macros. | |
159 | ||
160 | # All this mess means we have to cater for at least 3 different | |
161 | # sched_setaffinity prototypes: | |
162 | ||
163 | # ~~~~ | |
164 | # int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask); | |
165 | # int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset); | |
166 | # int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask); | |
167 | # ~~~~ | |
168 | ||
a6412536 AM |
169 | # Since we define _GNU_SOURCE in the sources, must do so too in the |
170 | # autoconf tests, as defining _GNU_SOURCE or not exposes | |
171 | # sched_setaffinity bits differently. | |
d8540fc5 PA |
172 | saved_CFLAGS=$CFLAGS |
173 | CFLAGS="$CFLAGS -D_GNU_SOURCE" | |
174 | ||
175 | # First check if the function is available at all. | |
a6412536 AM |
176 | AC_CHECK_FUNCS([sched_setaffinity],[ |
177 | # Okay, we have it. Check if also have cpu_set_t. If we don't, | |
178 | # then we have the first version using unsigned long, and no | |
179 | # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the | |
180 | # version with 2 or 3 arguments. In that case, CPU_ZERO, etc., | |
181 | # should also be present, but we confirm nonetheless. | |
182 | ||
183 | AC_CHECK_TYPES([cpu_set_t],[ | |
184 | # We do have it. Confirm that we have CPU_ZERO, and it actually works. | |
185 | AC_MSG_CHECKING([whether CPU_ZERO works]) | |
186 | AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works]) | |
ec5e2d14 | 187 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ |
a6412536 AM |
188 | #define _GNU_SOURCE |
189 | #include <sched.h> | |
fe0707ab MD |
190 | int main() |
191 | { | |
192 | cpu_set_t foo; CPU_ZERO (&foo); | |
193 | return 0; | |
194 | } | |
a6412536 AM |
195 | ]]) |
196 | ],[ | |
197 | # Works! | |
198 | AC_DEFINE(HAVE_CPU_ZERO, 1) | |
199 | AC_MSG_RESULT([yes]) | |
200 | ],[ | |
201 | AC_MSG_RESULT([no]) | |
202 | ]) | |
203 | ||
204 | # Check how many arguments does sched_setaffinity take. | |
205 | # Should be 3 or 2. | |
206 | AC_MSG_CHECKING([how many arguments sched_setaffinity takes]) | |
ec5e2d14 | 207 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ |
a6412536 | 208 | #include <sched.h> |
fe0707ab MD |
209 | int main() |
210 | { | |
211 | cpu_set_t foo; | |
212 | sched_setaffinity (0, sizeof (foo), &foo); | |
213 | return 0; | |
214 | } | |
a6412536 AM |
215 | ]]) |
216 | ], | |
217 | [sched_set_affinity_args=3], | |
218 | [sched_set_affinity_args=2]) | |
219 | AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS, $sched_set_affinity_args, | |
220 | [Defined to sched_setaffinity's number of arguments.]) | |
221 | AC_MSG_RESULT([$sched_set_affinity_args]) | |
222 | ],[ | |
223 | # No cpu_set_t, always 3 args. | |
224 | AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3) | |
225 | ], | |
226 | [#include <sched.h>]) | |
227 | ]) | |
d8540fc5 PA |
228 | |
229 | CFLAGS=$saved_CFLAGS | |
230 | ||
455b809a PB |
231 | AC_CONFIG_LINKS([ |
232 | urcu/arch.h:$ARCHSRC | |
a2e7bf9c | 233 | urcu/uatomic.h:$UATOMICSRC |
455b809a | 234 | ]) |
48d848c7 PMF |
235 | AC_CONFIG_FILES([ |
236 | Makefile | |
fe999c05 | 237 | doc/Makefile |
48d848c7 | 238 | tests/Makefile |
2260a36c YB |
239 | liburcu.pc |
240 | liburcu-bp.pc | |
a6412536 | 241 | liburcu-cds.pc |
2260a36c YB |
242 | liburcu-qsbr.pc |
243 | liburcu-mb.pc | |
244 | liburcu-signal.pc | |
48d848c7 PMF |
245 | ]) |
246 | AC_OUTPUT | |
a6412536 AM |
247 | |
248 | # Report on selected configure options | |
249 | AS_IF([test "x$def_smp_support" = "xyes"],[ | |
250 | AS_ECHO("SMP support enabled.") | |
251 | ],[ | |
252 | AS_ECHO("SMP support disabled.") | |
253 | ]) |