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comparison make/bsd/makefiles/adjust-mflags.sh @ 3960:f08d439fab8c

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7089790: integrate bsd-port changes Reviewed-by: kvn, twisti, jrose Contributed-by: Kurt Miller <kurt@intricatesoftware.com>, Greg Lewis <glewis@eyesbeyond.com>, Jung-uk Kim <jkim@freebsd.org>, Christos Zoulas <christos@zoulas.com>, Landon Fuller <landonf@plausible.coop>, The FreeBSD Foundation <board@freebsdfoundation.org>, Michael Franz <mvfranz@gmail.com>, Roger Hoover <rhoover@apple.com>, Alexander Strange <astrange@apple.com>
author never
date Sun, 25 Sep 2011 16:03:29 -0700
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3959:eda6988c0d81 3960:f08d439fab8c
1 #! /bin/sh
2 #
3 # Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved.
4 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 #
6 # This code is free software; you can redistribute it and/or modify it
7 # under the terms of the GNU General Public License version 2 only, as
8 # published by the Free Software Foundation.
9 #
10 # This code is distributed in the hope that it will be useful, but WITHOUT
11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
13 # version 2 for more details (a copy is included in the LICENSE file that
14 # accompanied this code).
15 #
16 # You should have received a copy of the GNU General Public License version
17 # 2 along with this work; if not, write to the Free Software Foundation,
18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 #
20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 # or visit www.oracle.com if you need additional information or have any
22 # questions.
23 #
24 #
25
26 # This script is used only from top.make.
27 # The macro $(MFLAGS-adjusted) calls this script to
28 # adjust the "-j" arguments to take into account
29 # the HOTSPOT_BUILD_JOBS variable. The default
30 # handling of the "-j" argument by gnumake does
31 # not meet our needs, so we must adjust it ourselves.
32
33 # This argument adjustment applies to two recursive
34 # calls to "$(MAKE) $(MFLAGS-adjusted)" in top.make.
35 # One invokes adlc.make, and the other invokes vm.make.
36 # The adjustment propagates the desired concurrency
37 # level down to the sub-make (of the adlc or vm).
38 # The default behavior of gnumake is to run all
39 # sub-makes without concurrency ("-j1").
40
41 # Also, we use a make variable rather than an explicit
42 # "-j<N>" argument to control this setting, so that
43 # the concurrency setting (which must be tuned separately
44 # for each MP system) can be set via an environment variable.
45 # The recommended setting is 1.5x to 2x the number of available
46 # CPUs on the MP system, which is large enough to keep the CPUs
47 # busy (even though some jobs may be I/O bound) but not too large,
48 # we may presume, to overflow the system's swap space.
49
50 set -eu
51
52 default_build_jobs=4
53
54 case $# in
55 [12]) true;;
56 *) >&2 echo "Usage: $0 ${MFLAGS} ${HOTSPOT_BUILD_JOBS}"; exit 2;;
57 esac
58
59 MFLAGS=$1
60 HOTSPOT_BUILD_JOBS=${2-}
61
62 # Normalize any -jN argument to the form " -j${HBJ}"
63 MFLAGS=`
64 echo "$MFLAGS" \
65 | sed '
66 s/^-/ -/
67 s/ -\([^ ][^ ]*\)j/ -\1 -j/
68 s/ -j[0-9][0-9]*/ -j/
69 s/ -j\([^ ]\)/ -j -\1/
70 s/ -j/ -j'${HOTSPOT_BUILD_JOBS:-${default_build_jobs}}'/
71 ' `
72
73 case ${HOTSPOT_BUILD_JOBS} in \
74
75 '') case ${MFLAGS} in
76 *\ -j*)
77 >&2 echo "# Note: -jN is ineffective for setting parallelism in this makefile."
78 >&2 echo "# please set HOTSPOT_BUILD_JOBS=${default_build_jobs} in the command line or environment."
79 esac;;
80
81 ?*) case ${MFLAGS} in
82 *\ -j*) true;;
83 *) MFLAGS="-j${HOTSPOT_BUILD_JOBS} ${MFLAGS}";;
84 esac;;
85 esac
86
87 echo "${MFLAGS}"