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21 id B744F68055; Wed, 11 Apr 2012 21:47:32 +0300 (EEST)
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22 From: Tomi Ollila <tomi.ollila@iki.fi>
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23 To: Vladimir Marek <Vladimir.Marek@Oracle.COM>,
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24 Notmuch Mail <notmuch@notmuchmail.org>
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25 Subject: Re: [PATCH 1/4] Make configure use /bin/bash instead of /bin/sh
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26 In-Reply-To: <20120411084342.GL10554@pub.czech.sun.com>
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27 References: <1333966665-10469-1-git-send-email-Vladimir.Marek@oracle.com>
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28 <1333966665-10469-2-git-send-email-Vladimir.Marek@oracle.com>
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29 <CAB+hUn9eVVBN7xzMSUT6kB2+MNn8H6KoKuxGDOwck0sgp9qgmw@mail.gmail.com>
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30 <20120409121930.GA10554@pub.czech.sun.com>
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31 <m2ehrv4hx2.fsf@guru.guru-group.fi>
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32 <20120411084342.GL10554@pub.czech.sun.com>User-Agent:
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38 Date: Wed, 11 Apr 2012 21:47:32 +0300
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56 On Wed, Apr 11 2012, Vladimir Marek <Vladimir.Marek@Oracle.COM> wrote:
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64 >> Does the configure script work if you replace /bin/sh with /bin/ksh
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65 >> in your Solaris box
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67 > yes, it does work if executed by /bin/bash or /bin/ksh
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70 >> If yes, something like the following could be added to the beginning
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73 >> option=option=value
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74 >> if test ! x"${option$*=}" = x"value" 2>/dev/null; then
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75 >> if test x"${PREVENT_LOOPING-}" = x; then
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76 >> PREVENT_LOOPING=true; export PREVENT_LOOPING
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77 >> test ! -x /bin/ksh || exec /bin/ksh "$0" "$@"
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78 >> test ! -x /bin/bash || exec /bin/bash "$0" "$@"
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80 >> echo "Cannot find compatible shell for '$0'" >&2
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84 > Unfortunately, no. The /bin/sh says "bad substitution" and does not run
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85 > the script at all. I also tried
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87 > eval 'echo ${A%%1}'; echo ok
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89 > but that does not run the 'echo ok' and fails also.
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91 You're right! I tested this stuff using heirloom-sh
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92 from http://heirloom.sourceforge.net/sh.html
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94 It is interesting that the shell stops executing when
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95 it finds this syntax (instead of contnuing, even without -e)
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97 > I can see three possible solutions
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99 > 1) use bash or ksh in the shebang line
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101 Cannot do there are systems lacking /bin/bash & /bin/ksh
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103 > 2) rewrite the script as I gave the overview
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105 Some work todo; case construct can do option key matching to get
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106 identical interface and then cut or sed to get just option value.
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108 > 3) declare that solaris 10 /bin/sh is not compatible with configure
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111 > Frankly even 3) is viable option, one just have to remember to run
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112 > 'bash configure'. If everything else would work, I would be happy :)
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114 Option 4) use the following heuristics:
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117 if test x"${PREVENT_LOOPING-}" = x; then
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118 PREVENT_LOOPING=true; export PREVENT_LOOPING
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119 for x in /bin/ksh /bin/bash /usr/bin/bash
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120 do test ! -x "$x" || exec "$x" "$0" "$@"
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123 echo "Cannot find compatible shell for '$0'" >&2
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127 i.e. if tilde expansion is not done guess this shell is not
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130 Option 5) do substitution check in subshell:
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132 ( option=option=value; : ${option$*=} ) 2>/dev/null || {
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133 if test x"${PREVENT_LOOPING-}" = x; then
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134 PREVENT_LOOPING=true; export PREVENT_LOOPING
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135 for x in /bin/ksh /bin/bash /usr/bin/bash
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136 do test ! -x "$x" || exec "$x" "$0" "$@"
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139 echo "Cannot find compatible shell for '$0'" >&2
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