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annotate src/link.sh @ 35074:918b5b6ed9a4

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Added tag v9.1.0380 for changeset 80240c27c4ffb28ca15ee5b439d2605e8648b02e
author Christian Brabandt <cb@256bit.org>
date Sun, 28 Apr 2024 16:30:13 +0200
parents e1e3805fcd96
children 5418b0e3a0c1
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 # link.sh -- try linking Vim with different sets of libraries, finding the
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4 # minimal set for fastest startup. The problem is that configure adds a few
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5 # libraries when they exist, but this doesn't mean they are needed for Vim.
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6 #
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7 # Author: Bram Moolenaar
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8 # Last change: 2010 Nov 03
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9 # License: Public domain
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10 #
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11 # Warning: This fails miserably if the linker doesn't return an error code!
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12 #
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13 # Otherwise this script is fail-safe, falling back to the original full link
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14 # command if anything fails.
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15
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16 echo "$LINK " >link_$PROG.cmd
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17 exit_value=0
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18
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19 if test "$LINK_AS_NEEDED" = yes; then
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20 echo "link.sh: \$LINK_AS_NEEDED set to 'yes': invoking linker directly."
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21 cat link_$PROG.cmd
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22 if sh link_$PROG.cmd; then
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23 exit_value=0
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24 echo "link.sh: Linked fine"
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25 else
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26 exit_value=$?
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27 echo "link.sh: Linking failed"
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28 fi
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29 else
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30 if test -f auto/link.sed; then
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31
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32 #
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33 # If auto/link.sed already exists, use it. We assume a previous run of
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34 # link.sh has found the correct set of libraries.
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35 #
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36 echo "link.sh: The file 'auto/link.sed' exists, which is going to be used now."
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37 echo "link.sh: If linking fails, try deleting the auto/link.sed file."
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38 echo "link.sh: If this fails too, try creating an empty auto/link.sed file."
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39 else
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40
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41 # If linking works with the full link command, try removing some libraries,
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42 # that are known not to be needed on at least one system.
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43 # Remove auto/pathdef.c if there is a new link command and compile it again.
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44 # There is a loop to remove libraries that appear several times.
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45 #
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46 # Notes:
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47 # - Can't remove Xext; It links fine but will give an error when running gvim
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48 # with Motif.
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49 # - Don't remove the last -lm: On HP-UX Vim links OK but crashes when the GTK
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50 # GUI is started, because the "floor" symbol could not be resolved.
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51 #
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52 cat link_$PROG.cmd
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53 if sh link_$PROG.cmd; then
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54 touch auto/link.sed
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55 cp link_$PROG.cmd linkit_$PROG.sh
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56 for libname in SM ICE nsl dnet dnet_stub inet socket dir elf iconv Xt Xmu Xp Xpm X11 Xdmcp x w perl dl pthread thread readline m crypt attr; do
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57 cont=yes
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58 while test -n "$cont"; do
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59 if grep "l$libname " linkit_$PROG.sh >/dev/null; then
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60 if test ! -f link1_$PROG.sed; then
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61 echo "link.sh: OK, linking works, let's try omitting a few libraries."
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62 echo "link.sh: See auto/link.log for details."
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63 rm -f auto/link.log
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64 fi
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65 echo "s/-l$libname *//" >link1_$PROG.sed
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66 sed -f auto/link.sed <link_$PROG.cmd >linkit2_$PROG.sh
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67 sed -f link1_$PROG.sed <linkit2_$PROG.sh >linkit_$PROG.sh
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68 # keep the last -lm
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69 if test $libname != "m" || grep "lm " linkit_$PROG.sh >/dev/null; then
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70 echo "link.sh: Trying to omit the $libname library..."
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71 cat linkit_$PROG.sh >>auto/link.log
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72 # Redirect this link output, it may contain error messages which
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73 # should be ignored.
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74 if sh linkit_$PROG.sh >>auto/link.log 2>&1; then
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75 echo "link.sh: Vim doesn't need the $libname library!"
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76 cat link1_$PROG.sed >>auto/link.sed
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77 rm -f auto/pathdef.c
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78 else
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79 echo "link.sh: Vim DOES need the $libname library."
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80 cont=
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81 cp link_$PROG.cmd linkit_$PROG.sh
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82 fi
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83 else
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84 cont=
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85 cp link_$PROG.cmd linkit_$PROG.sh
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86 fi
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87 else
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88 cont=
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89 cp link_$PROG.cmd linkit_$PROG.sh
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90 fi
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91 done
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92 done
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93 if test ! -f auto/pathdef.c; then
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94 $MAKE objects/pathdef.o
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95 fi
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96 if test ! -f link1_$PROG.sed; then
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97 echo "link.sh: Linked fine, no libraries can be omitted"
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98 touch link3_$PROG.sed
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99 fi
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100 else
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101 exit_value=$?
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102 fi
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103 fi
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104
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105 #
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106 # Now do the real linking.
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107 #
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108 if test -s auto/link.sed; then
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109 echo "link.sh: Using auto/link.sed file to omit a few libraries"
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110 sed -f auto/link.sed <link_$PROG.cmd >linkit_$PROG.sh
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111 cat linkit_$PROG.sh
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112 if sh linkit_$PROG.sh; then
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113 exit_value=0
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114 echo "link.sh: Linked fine with a few libraries omitted"
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115 else
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116 exit_value=$?
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117 echo "link.sh: Linking failed, making auto/link.sed empty and trying again"
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118 mv -f auto/link.sed link2_$PROG.sed
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119 touch auto/link.sed
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120 rm -f auto/pathdef.c
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121 $MAKE objects/pathdef.o
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122 fi
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123 fi
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124 if test -f auto/link.sed -a ! -s auto/link.sed -a ! -f link3_$PROG.sed; then
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125 echo "link.sh: Using unmodified link command"
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126 cat link_$PROG.cmd
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127 if sh link_$PROG.cmd; then
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128 exit_value=0
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129 echo "link.sh: Linked OK"
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130 else
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131 exit_value=$?
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132 if test -f link2_$PROG.sed; then
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133 echo "link.sh: Linking doesn't work at all, removing auto/link.sed"
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134 rm -f auto/link.sed
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135 fi
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136 fi
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137 fi
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138
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139 fi
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140
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141 #
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142 # cleanup
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143 #
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144 rm -f link_$PROG.cmd linkit_$PROG.sh link1_$PROG.sed link2_$PROG.sed \
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145 link3_$PROG.sed linkit2_$PROG.sh
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146
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147 #
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148 # return an error code if something went wrong
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149 #
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150 exit $exit_value
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151
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152 # vim:set sw=2 et: