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48d848c7 PMF |
1 | # -*- Autoconf -*- |
2 | # Process this file with autoconf to produce a configure script. | |
3 | ||
4 | ||
c2f15ecd | 5 | AC_INIT([userspace-rcu],[0.6.7],[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 | ||
48d848c7 | 18 | AC_CONFIG_SRCDIR([urcu.h]) |
7d413817 | 19 | |
e72596d1 MD |
20 | AC_CONFIG_HEADERS([config.h urcu/config.h]) |
21 | ||
02be5561 MD |
22 | 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.]) |
23 | AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.]) | |
24 | AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.]) | |
a6412536 AM |
25 | AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks cmpxchg instruction.]) |
26 | AH_TEMPLATE([CONFIG_RCU_ARM_HAVE_DMB], [Use the dmb instruction if available for use on ARM.]) | |
48d848c7 PMF |
27 | |
28 | # Checks for programs. | |
29 | AC_PROG_CC | |
30 | AC_PROG_MAKE_SET | |
b14a378a | 31 | LT_INIT |
48d848c7 PMF |
32 | |
33 | # Checks for typedefs, structures, and compiler characteristics. | |
34 | AC_C_INLINE | |
35 | AC_TYPE_PID_T | |
36 | AC_TYPE_SIZE_T | |
37 | ||
38 | # Checks for library functions. | |
39 | AC_FUNC_MALLOC | |
40 | AC_FUNC_MMAP | |
b57aee66 | 41 | AC_CHECK_FUNCS([bzero gettimeofday munmap sched_getcpu strtoul sysconf]) |
48d848c7 PMF |
42 | |
43 | # Find arch type | |
a6412536 AM |
44 | AS_CASE([$host_cpu], |
45 | [i386], [ARCHTYPE="x86" && SUBARCHTYPE="x86compat"], | |
46 | [i486], [ARCHTYPE="x86"], | |
47 | [i586], [ARCHTYPE="x86"], | |
48 | [i686], [ARCHTYPE="x86"], | |
49 | [amd64], [ARCHTYPE="x86"], | |
50 | [x86_64], [ARCHTYPE="x86"], | |
51 | [powerpc], [ARCHTYPE="ppc"], | |
52 | [ppc64], [ARCHTYPE="ppc"], | |
53 | [powerpc64], [ARCHTYPE="ppc"], | |
54 | [ppc], [ARCHTYPE="ppc"], | |
55 | [s390], [ARCHTYPE="s390"], | |
56 | [s390x], [ARCHTYPE="s390"], | |
57 | [sparc64], [ARCHTYPE="sparc64"], | |
58 | [alpha*], [ARCHTYPE="alpha"], | |
59 | [ia64], [ARCHTYPE="gcc"], | |
60 | [arm*], [ARCHTYPE="arm"], | |
61 | [ARCHTYPE="unknown"] | |
62 | ) | |
91b0650a | 63 | |
a6412536 AM |
64 | AC_SUBST(ARCHTYPE) |
65 | AC_SUBST(SUBARCHTYPE) | |
5e626e0e | 66 | |
a2e7bf9c | 67 | UATOMICSRC=urcu/uatomic/$ARCHTYPE.h |
1b9119f8 | 68 | ARCHSRC=urcu/arch/$ARCHTYPE.h |
455b809a | 69 | |
a6412536 AM |
70 | AS_IF([test "x$SUBARCHTYPE" = xx86compat],[ |
71 | AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1]) | |
72 | ]) | |
73 | ||
74 | AS_IF([test "$host_cpu" = "armv7l"],[ | |
75 | CFLAGS="$CFLAGS -mcpu=cortex-a9 -mtune=cortex-a9 -O1" | |
76 | ]) | |
48d848c7 | 77 | |
a6412536 AM |
78 | # ARM-specific checks |
79 | AS_IF([test "x$ARCHTYPE" = "xarm"],[ | |
80 | AC_MSG_CHECKING([for dmb instruction]) | |
ec5e2d14 | 81 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([[]], [[asm volatile("dmb":::"memory");]])],[ |
a6412536 AM |
82 | AC_MSG_RESULT([yes]) |
83 | AC_DEFINE([CONFIG_RCU_ARM_HAVE_DMB], [1]) | |
84 | ],[ | |
85 | AC_MSG_RESULT([no]) | |
86 | ]) | |
87 | ]) | |
88 | ||
89 | # x86-specific checks | |
90 | AS_IF([test "x$ARCHTYPE" = "xx86"],[ | |
91 | AC_MSG_CHECKING([if architecture really supports the mfence instruction]) | |
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. | |
95 | AS_IF([test "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686"],[ | |
96 | AC_MSG_RESULT([yes]) | |
97 | AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1]) | |
98 | ],[ | |
99 | AC_MSG_RESULT([no]) | |
100 | ]) | |
101 | ]) | |
102 | ||
103 | # Check if sys_futex() is available | |
104 | AC_MSG_CHECKING([for sys_futex()]) | |
657e7f89 | 105 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([ |
a6412536 | 106 | #include <sys/syscall.h> |
a6412536 AM |
107 | #ifndef __NR_futex |
108 | #error "futexes not available" | |
109 | #endif | |
657e7f89 | 110 | ]) |
a6412536 | 111 | ],[ |
0854ccff | 112 | AC_MSG_RESULT([yes]) |
02be5561 | 113 | AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1]) |
0854ccff | 114 | compat_futex_test=0 |
91b0650a | 115 | ],[ |
0854ccff MD |
116 | AC_MSG_RESULT([no]) |
117 | compat_futex_test=1 | |
91b0650a | 118 | ]) |
0854ccff | 119 | |
a6412536 AM |
120 | AM_CONDITIONAL([COMPAT_FUTEX], [test "x$compat_futex_test" = "x1"]) |
121 | AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = "xx86compat"]) | |
0854ccff | 122 | |
a6412536 AM |
123 | # smp-support configure option |
124 | AC_ARG_ENABLE([smp-support], | |
125 | AS_HELP_STRING([--disable-smp-support], [Disable SMP support. Warning: only use this on uniprocessor systems. [default=enabled]]), | |
126 | [def_smp_support=$enableval], | |
127 | [def_smp_support="yes"]) | |
128 | AS_IF([test "x$def_smp_support" = "xyes"], [AC_DEFINE([CONFIG_RCU_SMP], [1])]) | |
7d413817 | 129 | |
48d848c7 | 130 | |
d8540fc5 PA |
131 | # From the sched_setaffinity(2)'s man page: |
132 | # ~~~~ | |
133 | # The CPU affinity system calls were introduced in Linux kernel 2.5.8. | |
134 | # The library interfaces were introduced in glibc 2.3. Initially, the | |
135 | # glibc interfaces included a cpusetsize argument. In glibc 2.3.3, | |
136 | # the cpuset size argument was removed, but this argument was | |
137 | # restored in glibc 2.3.4. | |
138 | # ~~~~ | |
139 | ||
140 | # In addition to that, some vendors ported the system call to 2.4 | |
141 | # kernels. | |
142 | ||
143 | # Furthermore, when the function first appeared, the MASK argument was | |
144 | # an unsigned long pointer, while later it was made into a cpu_set_t | |
145 | # pointer. Systems that have the cpu_set_t version also should have | |
146 | # the CPU_ZERO, CPU_SET, etc. macros. | |
147 | ||
148 | # All this mess means we have to cater for at least 3 different | |
149 | # sched_setaffinity prototypes: | |
150 | ||
151 | # ~~~~ | |
152 | # int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask); | |
153 | # int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset); | |
154 | # int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask); | |
155 | # ~~~~ | |
156 | ||
a6412536 AM |
157 | # Since we define _GNU_SOURCE in the sources, must do so too in the |
158 | # autoconf tests, as defining _GNU_SOURCE or not exposes | |
159 | # sched_setaffinity bits differently. | |
d8540fc5 PA |
160 | saved_CFLAGS=$CFLAGS |
161 | CFLAGS="$CFLAGS -D_GNU_SOURCE" | |
162 | ||
163 | # First check if the function is available at all. | |
a6412536 AM |
164 | AC_CHECK_FUNCS([sched_setaffinity],[ |
165 | # Okay, we have it. Check if also have cpu_set_t. If we don't, | |
166 | # then we have the first version using unsigned long, and no | |
167 | # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the | |
168 | # version with 2 or 3 arguments. In that case, CPU_ZERO, etc., | |
169 | # should also be present, but we confirm nonetheless. | |
170 | ||
171 | AC_CHECK_TYPES([cpu_set_t],[ | |
172 | # We do have it. Confirm that we have CPU_ZERO, and it actually works. | |
173 | AC_MSG_CHECKING([whether CPU_ZERO works]) | |
174 | AH_TEMPLATE([HAVE_CPU_ZERO], [Defined to 1 if we have CPU_ZERO and it works]) | |
ec5e2d14 | 175 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ |
a6412536 AM |
176 | #define _GNU_SOURCE |
177 | #include <sched.h> | |
178 | ]],[[ | |
179 | cpu_set_t foo; CPU_ZERO (&foo); | |
180 | ]]) | |
181 | ],[ | |
182 | # Works! | |
183 | AC_DEFINE(HAVE_CPU_ZERO, 1) | |
184 | AC_MSG_RESULT([yes]) | |
185 | ],[ | |
186 | AC_MSG_RESULT([no]) | |
187 | ]) | |
188 | ||
189 | # Check how many arguments does sched_setaffinity take. | |
190 | # Should be 3 or 2. | |
191 | AC_MSG_CHECKING([how many arguments sched_setaffinity takes]) | |
ec5e2d14 | 192 | AC_COMPILE_IFELSE([AC_LANG_SOURCE([[ |
a6412536 AM |
193 | #include <sched.h> |
194 | ]],[[ | |
195 | cpu_set_t foo; | |
196 | sched_setaffinity (0, sizeof (foo), &foo); | |
197 | ]]) | |
198 | ], | |
199 | [sched_set_affinity_args=3], | |
200 | [sched_set_affinity_args=2]) | |
201 | AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS, $sched_set_affinity_args, | |
202 | [Defined to sched_setaffinity's number of arguments.]) | |
203 | AC_MSG_RESULT([$sched_set_affinity_args]) | |
204 | ],[ | |
205 | # No cpu_set_t, always 3 args. | |
206 | AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3) | |
207 | ], | |
208 | [#include <sched.h>]) | |
209 | ]) | |
d8540fc5 PA |
210 | |
211 | CFLAGS=$saved_CFLAGS | |
212 | ||
455b809a PB |
213 | AC_CONFIG_LINKS([ |
214 | urcu/arch.h:$ARCHSRC | |
a2e7bf9c | 215 | urcu/uatomic.h:$UATOMICSRC |
455b809a | 216 | ]) |
48d848c7 PMF |
217 | AC_CONFIG_FILES([ |
218 | Makefile | |
219 | tests/Makefile | |
2260a36c YB |
220 | liburcu.pc |
221 | liburcu-bp.pc | |
a6412536 | 222 | liburcu-cds.pc |
2260a36c YB |
223 | liburcu-qsbr.pc |
224 | liburcu-mb.pc | |
225 | liburcu-signal.pc | |
48d848c7 PMF |
226 | ]) |
227 | AC_OUTPUT | |
a6412536 AM |
228 | |
229 | # Report on selected configure options | |
230 | AS_IF([test "x$def_smp_support" = "xyes"],[ | |
231 | AS_ECHO("SMP support enabled.") | |
232 | ],[ | |
233 | AS_ECHO("SMP support disabled.") | |
234 | ]) |