| # =========================================================================== |
| # http://www.gnu.org/software/autoconf-archive/ax_count_cpus.html |
| # =========================================================================== |
| # |
| # SYNOPSIS |
| # |
| # AX_COUNT_CPUS |
| # |
| # DESCRIPTION |
| # |
| # Attempt to count the number of processors present on the machine. If the |
| # detection fails, then a value of 1 is assumed. |
| # |
| # The value is placed in the CPU_COUNT variable. |
| # |
| # LICENSE |
| # |
| # Copyright (c) 2012 Brian Aker <brian@tangent.org> |
| # Copyright (c) 2008 Michael Paul Bailey <jinxidoru@byu.net> |
| # Copyright (c) 2008 Christophe Tournayre <turn3r@users.sourceforge.net> |
| # |
| # Copying and distribution of this file, with or without modification, are |
| # permitted in any medium without royalty provided the copyright notice |
| # and this notice are preserved. This file is offered as-is, without any |
| # warranty. |
| |
| #serial 10 |
| |
| AC_DEFUN([AX_COUNT_CPUS],[ |
| AC_REQUIRE([AC_CANONICAL_HOST]) |
| AC_REQUIRE([AC_PROG_EGREP]) |
| AC_MSG_CHECKING([the number of available CPUs]) |
| CPU_COUNT="0" |
| |
| AS_CASE([$host_os],[ |
| *darwin*],[ |
| AS_IF([test -x /usr/sbin/sysctl],[ |
| sysctl_a=`/usr/sbin/sysctl -a 2>/dev/null| grep -c hw.cpu` |
| AS_IF([test sysctl_a],[ |
| CPU_COUNT=`/usr/sbin/sysctl -n hw.ncpu` |
| ]) |
| ])],[ |
| *linux*],[ |
| AS_IF([test "x$CPU_COUNT" = "x0" -a -e /proc/cpuinfo],[ |
| AS_IF([test "x$CPU_COUNT" = "x0" -a -e /proc/cpuinfo],[ |
| CPU_COUNT=`$EGREP -c '^processor' /proc/cpuinfo` |
| ]) |
| ]) |
| ]) |
| |
| AS_IF([test "x$CPU_COUNT" = "x0"],[ |
| CPU_COUNT="1" |
| AC_MSG_RESULT( [unable to detect (assuming 1)] ) |
| ],[ |
| AC_MSG_RESULT( $CPU_COUNT ) |
| ]) |
| ]) |
