Mercurial > jdk8-mips64-public > hotspot / file revision

 #! /bin/sh

 #

 # Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved.

 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 #

 # This code is free software; you can redistribute it and/or modify it

 # under the terms of the GNU General Public License version 2 only, as

 # published by the Free Software Foundation.

 #

 # This code is distributed in the hope that it will be useful, but WITHOUT

 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 # version 2 for more details (a copy is included in the LICENSE file that

 # accompanied this code).

 #

 # You should have received a copy of the GNU General Public License version

 # 2 along with this work; if not, write to the Free Software Foundation,

 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 #

 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 # or visit www.oracle.com if you need additional information or have any

 # questions.

 #  

 #

 # This script is used only from top.make.

 # The macro $(MFLAGS-adjusted) calls this script to

 # adjust the "-j" arguments to take into account

 # the HOTSPOT_BUILD_JOBS variable.  The default

 # handling of the "-j" argument by gnumake does

 # not meet our needs, so we must adjust it ourselves.

 # This argument adjustment applies to two recursive

 # calls to "$(MAKE) $(MFLAGS-adjusted)" in top.make.

 # One invokes adlc.make, and the other invokes vm.make.

 # The adjustment propagates the desired concurrency

 # level down to the sub-make (of the adlc or vm).

 # The default behavior of gnumake is to run all

 # sub-makes without concurrency ("-j1").

 # Also, we use a make variable rather than an explicit

 # "-j<N>" argument to control this setting, so that

 # the concurrency setting (which must be tuned separately

 # for each MP system) can be set via an environment variable.

 # The recommended setting is 1.5x to 2x the number of available

 # CPUs on the MP system, which is large enough to keep the CPUs

 # busy (even though some jobs may be I/O bound) but not too large,

 # we may presume, to overflow the system's swap space.

 set -eu

 default_build_jobs=4

 case $# in

 [12])	true;;

 *)	>&2 echo "Usage: $0 ${MFLAGS} ${HOTSPOT_BUILD_JOBS}"; exit 2;;

 esac

 MFLAGS=$1

 HOTSPOT_BUILD_JOBS=${2-}

 # Normalize any -jN argument to the form " -j${HBJ}"

 MFLAGS=`

 	echo "$MFLAGS" \

 	| sed '

 		s/^-/ -/

 		s/ -\([^ 	I][^ 	I]*\)j/ -\1 -j/

 		s/ -j[0-9][0-9]*/ -j/

 		s/ -j\([^ 	]\)/ -j -\1/

 		s/ -j/ -j'${HOTSPOT_BUILD_JOBS:-${default_build_jobs}}'/

 	' `

 case ${HOTSPOT_BUILD_JOBS} in \

 '') case ${MFLAGS} in

     *\ -j*)

 	>&2 echo "# Note: -jN is ineffective for setting parallelism in this makefile." 

 	>&2 echo "# please set HOTSPOT_BUILD_JOBS=${default_build_jobs} in the command line or environment."

     esac;;

 ?*) case ${MFLAGS} in

      *\ -j*) true;;

      *)      MFLAGS="-j${HOTSPOT_BUILD_JOBS} ${MFLAGS}";;

     esac;;

 esac

 echo "${MFLAGS}"