aoqi@0: #! /bin/sh
aoqi@0: #
aoqi@0: # Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved.
aoqi@0: # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0: #
aoqi@0: # This code is free software; you can redistribute it and/or modify it
aoqi@0: # under the terms of the GNU General Public License version 2 only, as
aoqi@0: # published by the Free Software Foundation.
aoqi@0: #
aoqi@0: # This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0: # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0: # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
aoqi@0: # version 2 for more details (a copy is included in the LICENSE file that
aoqi@0: # accompanied this code).
aoqi@0: #
aoqi@0: # You should have received a copy of the GNU General Public License version
aoqi@0: # 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0: # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0: #
aoqi@0: # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0: # or visit www.oracle.com if you need additional information or have any
aoqi@0: # questions.
aoqi@0: #  
aoqi@0: #
aoqi@0: 
aoqi@0: # This script is used only from top.make.
aoqi@0: # The macro $(MFLAGS-adjusted) calls this script to
aoqi@0: # adjust the "-j" arguments to take into account
aoqi@0: # the HOTSPOT_BUILD_JOBS variable.  The default
aoqi@0: # handling of the "-j" argument by gnumake does
aoqi@0: # not meet our needs, so we must adjust it ourselves.
aoqi@0: 
aoqi@0: # This argument adjustment applies to two recursive
aoqi@0: # calls to "$(MAKE) $(MFLAGS-adjusted)" in top.make.
aoqi@0: # One invokes adlc.make, and the other invokes vm.make.
aoqi@0: # The adjustment propagates the desired concurrency
aoqi@0: # level down to the sub-make (of the adlc or vm).
aoqi@0: # The default behavior of gnumake is to run all
aoqi@0: # sub-makes without concurrency ("-j1").
aoqi@0: 
aoqi@0: # Also, we use a make variable rather than an explicit
aoqi@0: # "-j<N>" argument to control this setting, so that
aoqi@0: # the concurrency setting (which must be tuned separately
aoqi@0: # for each MP system) can be set via an environment variable.
aoqi@0: # The recommended setting is 1.5x to 2x the number of available
aoqi@0: # CPUs on the MP system, which is large enough to keep the CPUs
aoqi@0: # busy (even though some jobs may be I/O bound) but not too large,
aoqi@0: # we may presume, to overflow the system's swap space.
aoqi@0: 
aoqi@0: set -eu
aoqi@0: 
aoqi@0: default_build_jobs=4
aoqi@0: 
aoqi@0: case $# in
aoqi@0: [12])	true;;
aoqi@0: *)	>&2 echo "Usage: $0 ${MFLAGS} ${HOTSPOT_BUILD_JOBS}"; exit 2;;
aoqi@0: esac
aoqi@0: 
aoqi@0: MFLAGS=$1
aoqi@0: HOTSPOT_BUILD_JOBS=${2-}
aoqi@0: 
aoqi@0: # Normalize any -jN argument to the form " -j${HBJ}"
aoqi@0: MFLAGS=`
aoqi@0: 	echo "$MFLAGS" \
aoqi@0: 	| sed '
aoqi@0: 		s/^-/ -/
aoqi@0: 		s/ -\([^ 	][^ 	]*\)j/ -\1 -j/
aoqi@0: 		s/ -j[0-9][0-9]*/ -j/
aoqi@0: 		s/ -j\([^ 	]\)/ -j -\1/
aoqi@0: 		s/ -j/ -j'${HOTSPOT_BUILD_JOBS:-${default_build_jobs}}'/
aoqi@0: 	' `
aoqi@0: 
aoqi@0: case ${HOTSPOT_BUILD_JOBS} in \
aoqi@0: 
aoqi@0: '') case ${MFLAGS} in
aoqi@0:     *\ -j*)
aoqi@0: 	>&2 echo "# Note: -jN is ineffective for setting parallelism in this makefile." 
aoqi@0: 	>&2 echo "# please set HOTSPOT_BUILD_JOBS=${default_build_jobs} in the command line or environment."
aoqi@0:     esac;;
aoqi@0: 
aoqi@0: ?*) case ${MFLAGS} in
aoqi@0:      *\ -j*) true;;
aoqi@0:      *)      MFLAGS="-j${HOTSPOT_BUILD_JOBS} ${MFLAGS}";;
aoqi@0:     esac;;
aoqi@0: esac
aoqi@0: 
aoqi@0: echo "${MFLAGS}"