# =========================================================================== # http://www.gnu.org/software/autoconf-archive/ax_am_jobserver.html # =========================================================================== # # SYNOPSIS # # AX_AM_JOBSERVER([default_value]) # # DESCRIPTION # # Enables the use of make's jobserver for the purpose of parallel building # by passing the -j option to make. # # The option --enable-jobserver is added to configure which can accept a # yes, no, or an integer. The integer is the number of separate jobs to # allow. If 'yes' is given, then the is assumed to be one more than the # number of CPUs (determined through AX_COUNT_CPUS). If the value of no is # given, then the jobserver is disabled. The default value is given by the # first argument of the macro, or 'yes' if the argument is omitted. # # This macro makes use of AX_AM_MACROS, so you must add the following line # # @INC_AMINCLUDE@ # # to your Makefile.am files. # # LICENSE # # Copyright (c) 2008 Michael Paul Bailey <jinxidoru@byu.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 7 AC_DEFUN([AX_AM_JOBSERVER], [ AC_REQUIRE([AX_COUNT_CPUS]) AC_REQUIRE([AX_AM_MACROS]) AC_ARG_ENABLE( jobserver, [ --enable-jobserver@<:@=no/yes/@%:@@:>@ default=m4_ifval([$1],[$1],[yes]) Enable up to @%:@ make jobs yes: enable one more than CPU count ],, [enable_jobserver=m4_ifval([$1],[$1],[yes])]) if test "x$enable_jobserver" = "xyes"; then enable_jobserver=$CPU_COUNT ((enable_jobserver++)) fi m4_pattern_allow(AM_MAKEFLAGS) if test "x$enable_jobserver" != "xno"; then AC_MSG_NOTICE([added jobserver support to make for $enable_jobserver jobs]) AX_ADD_AM_MACRO( AM_MAKEFLAGS += -j$enable_jobserver ) fi ])