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