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48d848c7 PMF |
1 | # -*- Autoconf -*- |
2 | # Process this file with autoconf to produce a configure script. | |
3 | ||
4 | ||
7dfc9438 | 5 | AC_INIT([userspace-rcu], [0.4.4], [mathieu dot desnoyers at efficios dot com]) |
48d848c7 | 6 | AC_CONFIG_AUX_DIR([config]) |
7d413817 MD |
7 | AC_CANONICAL_TARGET |
8 | AC_CANONICAL_HOST | |
48d848c7 | 9 | AM_INIT_AUTOMAKE([foreign dist-bzip2 no-dist-gzip]) |
806f8114 PB |
10 | m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])]) |
11 | ||
48d848c7 | 12 | AC_CONFIG_SRCDIR([urcu.h]) |
0f4ac97f | 13 | AM_PROG_MKDIR_P |
7d413817 | 14 | |
e72596d1 MD |
15 | AC_CONFIG_HEADERS([config.h urcu/config.h]) |
16 | ||
17 | # Keep at the end to do not pollute installed header. | |
02be5561 MD |
18 | 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.]) |
19 | AH_TEMPLATE([CONFIG_RCU_HAVE_FENCE], [Defined when on a system that has memory fence instructions.]) | |
20 | AH_TEMPLATE([CONFIG_RCU_HAVE_FUTEX], [Defined when on a system with futex support.]) | |
21 | AH_TEMPLATE([CONFIG_RCU_COMPAT_ARCH], [Compatibility mode for i386 which lacks | |
bf9de1b7 | 22 | cmpxchg instruction.]) |
48d848c7 PMF |
23 | |
24 | # Checks for programs. | |
25 | AC_PROG_CC | |
26 | AC_PROG_MAKE_SET | |
27 | AC_PROG_LIBTOOL | |
28 | ||
29 | # Checks for typedefs, structures, and compiler characteristics. | |
30 | AC_C_INLINE | |
31 | AC_TYPE_PID_T | |
32 | AC_TYPE_SIZE_T | |
33 | ||
34 | # Checks for library functions. | |
35 | AC_FUNC_MALLOC | |
36 | AC_FUNC_MMAP | |
37 | AC_CHECK_FUNCS([bzero gettimeofday munmap strtoul]) | |
38 | ||
39 | # Find arch type | |
c5b9f8ff | 40 | case $host_cpu in |
7d413817 | 41 | i386) ARCHTYPE="x86"; SUBARCHTYPE="x86compat" ;; |
bf9de1b7 MD |
42 | i486) ARCHTYPE="x86";; |
43 | i586) ARCHTYPE="x86";; | |
44 | i686) ARCHTYPE="x86";; | |
48d848c7 | 45 | x86_64) ARCHTYPE="x86";; |
48d848c7 PMF |
46 | powerpc) ARCHTYPE="ppc" ;; |
47 | ppc64) ARCHTYPE="ppc" ;; | |
7d413817 | 48 | powerpc64) ARCHTYPE="ppc" ;; |
48d848c7 PMF |
49 | ppc) ARCHTYPE="ppc" ;; |
50 | s390) ARCHTYPE="s390" ;; | |
51 | s390x) ARCHTYPE="s390" ;; | |
c0a68bfa | 52 | sparc64) ARCHTYPE="sparc64" ;; |
6f9d9b49 | 53 | alpha*) ARCHTYPE="alpha" ;; |
ca5a03db | 54 | ia64) ARCHTYPE="gcc" ;; |
fdbddd0b | 55 | armv7l) ARCHTYPE="armv7l" ;; |
48d848c7 PMF |
56 | *) ARCHTYPE="unknown";; |
57 | esac | |
58 | ||
83676f0e PB |
59 | if test "$ARCHTYPE" != "unknown"; then |
60 | UATOMICSRC=urcu/uatomic_arch_$ARCHTYPE.h | |
61 | ARCHSRC=urcu/arch_$ARCHTYPE.h | |
62 | else | |
63 | UATOMICSRC=urcu/uatomic_generic.h | |
64 | ARCHSRC=urcu/arch_generic.h | |
48d848c7 | 65 | fi |
455b809a PB |
66 | if test "x$ARCHTYPE" != xx86 -a "x$ARCHTYPE" != xppc; then |
67 | APISRC=tests/api_gcc.h | |
68 | else | |
69 | APISRC=tests/api_$ARCHTYPE.h | |
70 | fi | |
fdbddd0b PM |
71 | if test "$ARCHTYPE" == "armv7l"; then |
72 | CFLAGS="-mcpu=cortex-a9 -mtune=cortex-a9 -O" | |
73 | fi | |
455b809a | 74 | |
48d848c7 | 75 | AC_SUBST(ARCHTYPE) |
7d413817 | 76 | AC_SUBST(SUBARCHTYPE) |
48d848c7 | 77 | |
90586875 | 78 | [ |
c5b9f8ff | 79 | #if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586"; then |
6cb4ed53 MD |
80 | #For now, using lock; addl compatibility mode even for i686, because the |
81 | #Pentium III is seen as a i686, but lacks mfence instruction. | |
82 | #Only using fence for x86_64. | |
c5b9f8ff | 83 | if test "x$ARCHTYPE" = "xx86" -a "x$host_cpu" != "xi386" -a "x$host_cpu" != "xi486" -a "x$host_cpu" != "xi586" -a "x$host_cpu" != "xi686"; then |
90586875 | 84 | ] |
02be5561 | 85 | AC_DEFINE([CONFIG_RCU_HAVE_FENCE], [1]) |
90586875 MD |
86 | [ |
87 | fi | |
88 | ] | |
89 | ||
49617de1 | 90 | AC_MSG_CHECKING([sys_futex()]) |
0854ccff MD |
91 | AC_TRY_COMPILE( |
92 | [ | |
93 | #include <sys/syscall.h> | |
94 | ], | |
95 | [ | |
96 | #ifndef __NR_futex | |
97 | #error "futexes not available" | |
98 | #endif | |
99 | ], | |
100 | [ | |
101 | AC_MSG_RESULT([yes]) | |
02be5561 | 102 | AC_DEFINE([CONFIG_RCU_HAVE_FUTEX], [1]) |
0854ccff MD |
103 | compat_futex_test=0 |
104 | ] | |
105 | , | |
106 | [ | |
107 | AC_MSG_RESULT([no]) | |
108 | compat_futex_test=1 | |
109 | ] | |
110 | ) | |
111 | ||
112 | AM_CONDITIONAL([COMPAT_FUTEX], [ test "x$compat_futex_test" = "x1" ]) | |
113 | ||
0854ccff | 114 | AM_CONDITIONAL([COMPAT_ARCH], [test "x$SUBARCHTYPE" = xx86compat ]) |
7d413817 | 115 | |
bf9de1b7 MD |
116 | [ |
117 | if test "x$SUBARCHTYPE" = xx86compat; then | |
118 | ] | |
02be5561 | 119 | AC_DEFINE([CONFIG_RCU_COMPAT_ARCH], [1]) |
bf9de1b7 MD |
120 | [ |
121 | fi | |
122 | ] | |
123 | ||
7d413817 MD |
124 | AC_ARG_ENABLE([smp-support], [ --disable-smp-support Disable SMP support. Warning: only use this |
125 | on uniprocessor systems. [[default=enabled]]], [def_smp_support=$enableval], [def_smp_support="yes"]) | |
126 | ||
127 | [ | |
128 | if test "$def_smp_support" = "no"; then | |
129 | echo "SMP support disabled." | |
130 | else | |
131 | ] | |
02be5561 | 132 | AC_DEFINE([CONFIG_RCU_SMP], [1]) |
7d413817 MD |
133 | [ |
134 | echo "SMP support enabled." | |
135 | fi | |
136 | ] | |
48d848c7 | 137 | |
d8540fc5 PA |
138 | # From the sched_setaffinity(2)'s man page: |
139 | # ~~~~ | |
140 | # The CPU affinity system calls were introduced in Linux kernel 2.5.8. | |
141 | # The library interfaces were introduced in glibc 2.3. Initially, the | |
142 | # glibc interfaces included a cpusetsize argument. In glibc 2.3.3, | |
143 | # the cpuset size argument was removed, but this argument was | |
144 | # restored in glibc 2.3.4. | |
145 | # ~~~~ | |
146 | ||
147 | # In addition to that, some vendors ported the system call to 2.4 | |
148 | # kernels. | |
149 | ||
150 | # Furthermore, when the function first appeared, the MASK argument was | |
151 | # an unsigned long pointer, while later it was made into a cpu_set_t | |
152 | # pointer. Systems that have the cpu_set_t version also should have | |
153 | # the CPU_ZERO, CPU_SET, etc. macros. | |
154 | ||
155 | # All this mess means we have to cater for at least 3 different | |
156 | # sched_setaffinity prototypes: | |
157 | ||
158 | # ~~~~ | |
159 | # int sched_setaffinity (pid_t pid, unsigned int len, unsigned long *mask); | |
160 | # int sched_setaffinity (pid_t __pid, size_t __cpusetsize, const cpu_set_t *__cpuset); | |
161 | # int sched_setaffinity (pid_t __pid, const cpu_set_t *__mask); | |
162 | # ~~~~ | |
163 | ||
164 | dnl Since we define _GNU_SOURCE in the sources, must do so too in the | |
165 | dnl autoconf tests, as defining _GNU_SOURCE or not exposes | |
166 | dnl sched_setaffinity bits differently. | |
167 | saved_CFLAGS=$CFLAGS | |
168 | CFLAGS="$CFLAGS -D_GNU_SOURCE" | |
169 | ||
170 | # First check if the function is available at all. | |
171 | AC_CHECK_FUNCS( | |
172 | [sched_setaffinity], | |
173 | [ # Okay, we have it. Check if also have cpu_set_t. If we don't, | |
174 | # then we have the first version using unsigned long, and no | |
175 | # CPU_ZERO, etc. macros. If we do have cpu_set_t, we may have the | |
176 | # version with 2 or 3 arguments. In that case, CPU_ZERO, etc., | |
177 | # should also be present, but we confirm nonetheless. | |
178 | ||
179 | AC_CHECK_TYPES( | |
180 | [cpu_set_t], | |
181 | [ # We do have it. Confirm that we have CPU_ZERO, and it actually works. | |
182 | AC_MSG_CHECKING([whether CPU_ZERO works]) | |
183 | AH_TEMPLATE([HAVE_CPU_ZERO], | |
184 | [Define to 1 if we have CPU_ZERO and if it works]) | |
185 | AC_COMPILE_IFELSE( | |
186 | [AC_LANG_PROGRAM( | |
187 | [#define _GNU_SOURCE | |
188 | #include <sched.h>], | |
189 | [cpu_set_t foo; CPU_ZERO (&foo);]) | |
190 | ], | |
191 | [ # Works! | |
192 | AC_DEFINE(HAVE_CPU_ZERO, 1) | |
193 | AC_MSG_RESULT([yes]) | |
194 | ], | |
195 | [AC_MSG_RESULT([no])] | |
196 | ) | |
197 | ||
198 | # Check how many arguments does sched_setaffinity take. | |
199 | # Should be 3 or 2. | |
200 | AC_MSG_CHECKING([how many arguments sched_setaffinity takes]) | |
201 | AC_COMPILE_IFELSE( | |
202 | [AC_LANG_PROGRAM( | |
203 | [#include <sched.h>], | |
204 | [cpu_set_t foo; sched_setaffinity (0, sizeof (foo), &foo);]) | |
205 | ], | |
206 | [sched_set_affinity_args=3], | |
207 | [sched_set_affinity_args=2]) | |
208 | AC_DEFINE_UNQUOTED(SCHED_SETAFFINITY_ARGS, $sched_set_affinity_args, | |
209 | [Define to sched_setaffinity's number of arguments.]) | |
210 | AC_MSG_RESULT([$sched_set_affinity_args]) | |
211 | ], | |
212 | [ # No cpu_set_t, always 3 args. | |
213 | AC_DEFINE(SCHED_SETAFFINITY_ARGS, 3) ], | |
214 | [#include <sched.h>] | |
215 | ) | |
216 | ] | |
217 | ) | |
218 | ||
219 | CFLAGS=$saved_CFLAGS | |
220 | ||
455b809a PB |
221 | AC_CONFIG_LINKS([ |
222 | urcu/arch.h:$ARCHSRC | |
223 | urcu/uatomic_arch.h:$UATOMICSRC | |
224 | tests/api.h:$APISRC | |
225 | ]) | |
48d848c7 PMF |
226 | AC_CONFIG_FILES([ |
227 | Makefile | |
228 | tests/Makefile | |
229 | ]) | |
230 | AC_OUTPUT |