2012-10-26 00:35:52 -04:00
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# ===========================================================================
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2018-04-14 23:31:01 -10:00
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# https://www.gnu.org/software/autoconf-archive/ax_am_jobserver.html
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2012-10-26 00:35:52 -04:00
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# AX_AM_JOBSERVER([default_value])
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#
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# DESCRIPTION
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#
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# Enables the use of make's jobserver for the purpose of parallel building
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# by passing the -j option to make.
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#
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# The option --enable-jobserver is added to configure which can accept a
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# yes, no, or an integer. The integer is the number of separate jobs to
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# allow. If 'yes' is given, then the is assumed to be one more than the
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# number of CPUs (determined through AX_COUNT_CPUS). If the value of no is
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# given, then the jobserver is disabled. The default value is given by the
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# first argument of the macro, or 'yes' if the argument is omitted.
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#
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# This macro makes use of AX_AM_MACROS, so you must add the following line
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#
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# @INC_AMINCLUDE@
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#
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# to your Makefile.am files.
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#
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# LICENSE
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#
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# Copyright (c) 2008 Michael Paul Bailey <jinxidoru@byu.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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2018-04-14 23:31:01 -10:00
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#serial 8
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2012-10-26 00:35:52 -04:00
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AC_DEFUN([AX_AM_JOBSERVER], [
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AC_REQUIRE([AX_COUNT_CPUS])
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AC_REQUIRE([AX_AM_MACROS])
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AC_ARG_ENABLE( jobserver,
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[ --enable-jobserver@<:@=no/yes/@%:@@:>@ default=m4_ifval([$1],[$1],[yes])
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Enable up to @%:@ make jobs
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yes: enable one more than CPU count
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],, [enable_jobserver=m4_ifval([$1],[$1],[yes])])
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if test "x$enable_jobserver" = "xyes"; then
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2018-04-14 23:31:01 -10:00
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enable_jobserver=$CPU_COUNT
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((enable_jobserver++))
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2012-10-26 00:35:52 -04:00
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fi
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m4_pattern_allow(AM_MAKEFLAGS)
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if test "x$enable_jobserver" != "xno"; then
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AC_MSG_NOTICE([added jobserver support to make for $enable_jobserver jobs])
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AX_ADD_AM_MACRO( AM_MAKEFLAGS += -j$enable_jobserver )
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fi
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])
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