Commit | Line | Data |
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0f00f2c3 | 1 | # nproc.m4 serial 4 |
49114fd4 | 2 | dnl Copyright (C) 2009-2011 Free Software Foundation, Inc. |
0f00f2c3 LC |
3 | dnl This file is free software; the Free Software Foundation |
4 | dnl gives unlimited permission to copy and/or distribute it, | |
5 | dnl with or without modifications, as long as this notice is preserved. | |
6 | ||
7 | AC_DEFUN([gl_NPROC], | |
8 | [ | |
9 | gl_PREREQ_NPROC | |
10 | ]) | |
11 | ||
12 | # Prerequisites of lib/nproc.c. | |
13 | AC_DEFUN([gl_PREREQ_NPROC], | |
14 | [ | |
15 | dnl Persuade glibc <sched.h> to declare CPU_SETSIZE, CPU_ISSET etc. | |
16 | AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) | |
17 | ||
18 | AC_CHECK_HEADERS([sys/pstat.h sys/sysmp.h sys/param.h],,, | |
19 | [AC_INCLUDES_DEFAULT]) | |
20 | dnl <sys/sysctl.h> requires <sys/param.h> on OpenBSD 4.0. | |
21 | AC_CHECK_HEADERS([sys/sysctl.h],,, | |
22 | [AC_INCLUDES_DEFAULT | |
23 | #if HAVE_SYS_PARAM_H | |
24 | # include <sys/param.h> | |
25 | #endif | |
26 | ]) | |
27 | ||
28 | AC_CHECK_FUNCS([sched_getaffinity sched_getaffinity_np \ | |
29 | pstat_getdynamic sysmp sysctl]) | |
30 | ||
31 | dnl Test whether sched_getaffinity has the expected declaration. | |
32 | dnl glibc 2.3.[0-2]: | |
33 | dnl int sched_getaffinity (pid_t, unsigned int, unsigned long int *); | |
34 | dnl glibc 2.3.3: | |
35 | dnl int sched_getaffinity (pid_t, cpu_set_t *); | |
36 | dnl glibc >= 2.3.4: | |
37 | dnl int sched_getaffinity (pid_t, size_t, cpu_set_t *); | |
38 | if test $ac_cv_func_sched_getaffinity = yes; then | |
39 | AC_CACHE_CHECK([for glibc compatible sched_getaffinity], | |
40 | [gl_cv_func_sched_getaffinity3], | |
41 | [AC_COMPILE_IFELSE( | |
42 | [AC_LANG_PROGRAM( | |
43 | [[#include <sched.h>]], | |
44 | [[sched_getaffinity (0, 0, (cpu_set_t *) 0);]])], | |
45 | [gl_cv_func_sched_getaffinity3=yes], | |
46 | [gl_cv_func_sched_getaffinity3=no]) | |
47 | ]) | |
48 | if test $gl_cv_func_sched_getaffinity3 = yes; then | |
49 | AC_DEFINE([HAVE_SCHED_GETAFFINITY_LIKE_GLIBC], [1], | |
50 | [Define to 1 if sched_getaffinity has a glibc compatible declaration.]) | |
51 | fi | |
52 | fi | |
53 | ]) |