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annotate make/aix/makefiles/adjust-mflags.sh @ 18408:2c3666f44855

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Truffle: initial commit of object API implementation
author Andreas Woess <andreas.woess@jku.at>
date Tue, 18 Nov 2014 23:19:43 +0100
parents b83f7d608548
children 131c59b5e66a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #! /bin/sh
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2 #
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3 # Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
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4 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 #
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6 # This code is free software; you can redistribute it and/or modify it
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7 # under the terms of the GNU General Public License version 2 only, as
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8 # published by the Free Software Foundation.
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9 #
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10 # This code is distributed in the hope that it will be useful, but WITHOUT
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11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 # version 2 for more details (a copy is included in the LICENSE file that
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14 # accompanied this code).
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15 #
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16 # You should have received a copy of the GNU General Public License version
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17 # 2 along with this work; if not, write to the Free Software Foundation,
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18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 #
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20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 # or visit www.oracle.com if you need additional information or have any
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22 # questions.
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23 #
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24 #
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25
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26 # This script is used only from top.make.
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27 # The macro $(MFLAGS-adjusted) calls this script to
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28 # adjust the "-j" arguments to take into account
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29 # the HOTSPOT_BUILD_JOBS variable. The default
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30 # handling of the "-j" argument by gnumake does
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31 # not meet our needs, so we must adjust it ourselves.
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32
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33 # This argument adjustment applies to two recursive
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34 # calls to "$(MAKE) $(MFLAGS-adjusted)" in top.make.
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35 # One invokes adlc.make, and the other invokes vm.make.
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36 # The adjustment propagates the desired concurrency
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37 # level down to the sub-make (of the adlc or vm).
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38 # The default behavior of gnumake is to run all
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39 # sub-makes without concurrency ("-j1").
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40
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41 # Also, we use a make variable rather than an explicit
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42 # "-j<N>" argument to control this setting, so that
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43 # the concurrency setting (which must be tuned separately
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44 # for each MP system) can be set via an environment variable.
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45 # The recommended setting is 1.5x to 2x the number of available
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46 # CPUs on the MP system, which is large enough to keep the CPUs
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47 # busy (even though some jobs may be I/O bound) but not too large,
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48 # we may presume, to overflow the system's swap space.
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49
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50 set -eu
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51
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52 default_build_jobs=4
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53
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54 case $# in
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55 [12]) true;;
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56 *) >&2 echo "Usage: $0 ${MFLAGS} ${HOTSPOT_BUILD_JOBS}"; exit 2;;
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57 esac
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58
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59 MFLAGS=$1
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60 HOTSPOT_BUILD_JOBS=${2-}
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61
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62 # Normalize any -jN argument to the form " -j${HBJ}"
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63 MFLAGS=`
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64 echo "$MFLAGS" \
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65 | sed '
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66 s/^-/ -/
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67 s/ -\([^ ][^ ]*\)j/ -\1 -j/
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68 s/ -j[0-9][0-9]*/ -j/
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69 s/ -j\([^ ]\)/ -j -\1/
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70 s/ -j/ -j'${HOTSPOT_BUILD_JOBS:-${default_build_jobs}}'/
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71 ' `
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72
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73 case ${HOTSPOT_BUILD_JOBS} in \
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74
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75 '') case ${MFLAGS} in
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76 *\ -j*)
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77 >&2 echo "# Note: -jN is ineffective for setting parallelism in this makefile."
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78 >&2 echo "# please set HOTSPOT_BUILD_JOBS=${default_build_jobs} in the command line or environment."
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79 esac;;
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80
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81 ?*) case ${MFLAGS} in
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82 *\ -j*) true;;
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83 *) MFLAGS="-j${HOTSPOT_BUILD_JOBS} ${MFLAGS}";;
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84 esac;;
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85 esac
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86
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87 echo "${MFLAGS}"