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7
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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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1125
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8 # Last change: 2006 Sep 26
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9 # License: Public domain
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7
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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.cmd
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17 exit_value=0
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18
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19 #
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20 # If auto/link.sed already exists, use it. We assume a previous run of
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21 # link.sh has found the correct set of libraries.
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22 #
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23 if test -f auto/link.sed; then
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24 echo "link.sh: The file 'auto/link.sed' exists, which is going to be used now."
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25 echo "link.sh: If linking fails, try deleting the auto/link.sed file."
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26 echo "link.sh: If this fails too, try creating an empty auto/link.sed file."
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27 else
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28
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29 # If linking works with the full link command, try removing some libraries,
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30 # that are known not to be needed on at least one system.
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31 # Remove auto/pathdef.c if there is a new link command and compile it again.
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32 # There is a loop to remove libraries that appear several times.
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33 #
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34 # Notes:
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35 # - Can't remove Xext; It links fine but will give an error when running gvim
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36 # with Motif.
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37 # - Don't remove the last -lm: On HP-UX Vim links OK but crashes when the GTK
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38 # GUI is started, because the "floor" symbol could not be resolved.
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39 #
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40 cat link.cmd
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41 if sh link.cmd; then
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42 touch auto/link.sed
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43 cp link.cmd linkit.sh
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44 for libname in SM ICE nsl dnet dnet_stub inet socket dir elf iconv Xt Xmu Xp Xpm X11 Xdmcp x w dl pthread thread readline m perl crypt attr; do
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45 cont=yes
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46 while test -n "$cont"; do
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47 if grep "l$libname " linkit.sh >/dev/null; then
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48 if test ! -f link1.sed; then
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49 echo "link.sh: OK, linking works, let's try removing a few libraries."
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50 echo "link.sh: See auto/link.log for details."
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51 rm -f auto/link.log
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52 fi
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53 echo "s/-l$libname *//" >link1.sed
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54 sed -f auto/link.sed <link.cmd >linkit2.sh
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55 sed -f link1.sed <linkit2.sh >linkit.sh
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56 # keep the last -lm
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57 if test $libname != "m" || grep "lm " linkit.sh >/dev/null; then
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58 echo "link.sh: Trying to remove the $libname library..."
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59 cat linkit.sh >>auto/link.log
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60 # Redirect this link output, it may contain error messages which
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61 # should be ignored.
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62 if sh linkit.sh >>auto/link.log 2>&1; then
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63 echo "link.sh: We don't need the $libname library!"
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64 cat link1.sed >>auto/link.sed
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65 rm -f auto/pathdef.c
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66 else
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67 echo "link.sh: We DO need the $libname library."
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68 cont=
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69 cp link.cmd linkit.sh
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70 fi
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71 else
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72 cont=
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73 cp link.cmd linkit.sh
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74 fi
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75 else
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76 cont=
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77 cp link.cmd linkit.sh
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78 fi
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79 done
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80 done
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81 if test ! -f auto/pathdef.c; then
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82 $MAKE objects/pathdef.o
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83 fi
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84 if test ! -f link1.sed; then
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85 echo "link.sh: Linked fine, no libraries can be removed"
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86 touch link3.sed
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87 fi
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88 else
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89 exit_value=$?
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90 fi
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91 fi
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92
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93 #
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94 # Now do the real linking.
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95 #
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96 if test -s auto/link.sed; then
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97 echo "link.sh: Using auto/link.sed file to remove a few libraries"
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98 sed -f auto/link.sed <link.cmd >linkit.sh
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99 cat linkit.sh
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100 if sh linkit.sh; then
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101 exit_value=0
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102 echo "link.sh: Linked fine with a few libraries removed"
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103 else
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104 exit_value=$?
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105 echo "link.sh: Linking failed, making auto/link.sed empty and trying again"
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106 mv -f auto/link.sed link2.sed
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107 touch auto/link.sed
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108 rm -f auto/pathdef.c
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109 $MAKE objects/pathdef.o
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110 fi
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111 fi
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112 if test -f auto/link.sed -a ! -s auto/link.sed -a ! -f link3.sed; then
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113 echo "link.sh: Using unmodified link command"
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114 cat link.cmd
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115 if sh link.cmd; then
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116 exit_value=0
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117 echo "link.sh: Linked OK"
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118 else
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119 exit_value=$?
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120 if test -f link2.sed; then
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121 echo "link.sh: Linking doesn't work at all, removing auto/link.sed"
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122 rm -f auto/link.sed
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123 fi
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124 fi
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125 fi
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126
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127 #
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128 # cleanup
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129 #
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130 rm -f link.cmd linkit.sh link1.sed link2.sed link3.sed linkit2.sh
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131
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132 #
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133 # return an error code if something went wrong
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134 #
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135 exit $exit_value
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136
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137 # vim:set sw=2 et:
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