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authorLorry Tar Creator <lorry-tar-importer@lorry>2016-01-20 10:55:18 +0000
committerLorry Tar Creator <lorry-tar-importer@lorry>2016-01-20 10:55:18 +0000
commit70e9163c9c18e995515598085cb824e554eb7ae7 (patch)
treea42dc8b2a6c031354bf31472de888bfc8a060132 /m4/nproc.m4
parentcbf5993c43f49281173f185863577d86bfac6eae (diff)
downloadcoreutils-tarball-master.tar.gz
Diffstat (limited to 'm4/nproc.m4')
-rw-r--r--m4/nproc.m453
1 files changed, 53 insertions, 0 deletions
diff --git a/m4/nproc.m4 b/m4/nproc.m4
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+# nproc.m4 serial 4
+dnl Copyright (C) 2009-2016 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_NPROC],
+[
+ gl_PREREQ_NPROC
+])
+
+# Prerequisites of lib/nproc.c.
+AC_DEFUN([gl_PREREQ_NPROC],
+[
+ dnl Persuade glibc <sched.h> to declare CPU_SETSIZE, CPU_ISSET etc.
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+ AC_CHECK_HEADERS([sys/pstat.h sys/sysmp.h sys/param.h],,,
+ [AC_INCLUDES_DEFAULT])
+ dnl <sys/sysctl.h> requires <sys/param.h> on OpenBSD 4.0.
+ AC_CHECK_HEADERS([sys/sysctl.h],,,
+ [AC_INCLUDES_DEFAULT
+ #if HAVE_SYS_PARAM_H
+ # include <sys/param.h>
+ #endif
+ ])
+
+ AC_CHECK_FUNCS([sched_getaffinity sched_getaffinity_np \
+ pstat_getdynamic sysmp sysctl])
+
+ dnl Test whether sched_getaffinity has the expected declaration.
+ dnl glibc 2.3.[0-2]:
+ dnl int sched_getaffinity (pid_t, unsigned int, unsigned long int *);
+ dnl glibc 2.3.3:
+ dnl int sched_getaffinity (pid_t, cpu_set_t *);
+ dnl glibc >= 2.3.4:
+ dnl int sched_getaffinity (pid_t, size_t, cpu_set_t *);
+ if test $ac_cv_func_sched_getaffinity = yes; then
+ AC_CACHE_CHECK([for glibc compatible sched_getaffinity],
+ [gl_cv_func_sched_getaffinity3],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[#include <sched.h>]],
+ [[sched_getaffinity (0, 0, (cpu_set_t *) 0);]])],
+ [gl_cv_func_sched_getaffinity3=yes],
+ [gl_cv_func_sched_getaffinity3=no])
+ ])
+ if test $gl_cv_func_sched_getaffinity3 = yes; then
+ AC_DEFINE([HAVE_SCHED_GETAFFINITY_LIKE_GLIBC], [1],
+ [Define to 1 if sched_getaffinity has a glibc compatible declaration.])
+ fi
+ fi
+])