summaryrefslogtreecommitdiff
path: root/src/link.sh
blob: 0ab07f03dd7a69765d42654a5799a47d599a1a8e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
#! /bin/sh
#
# link.sh -- try linking Vim with different sets of libraries, finding the
# minimal set for fastest startup.  The problem is that configure adds a few
# libraries when they exist, but this doesn't mean they are needed for Vim.
#
#      Author: Bram Moolenaar
# Last change: 2005 Jan 25
#
# Warning: This fails miserably if the linker doesn't return an error code!
#
# Otherwise this script is fail-safe, falling back to the original full link
# command if anything fails.

echo "$LINK " >link.cmd
exit_value=0

#
# If auto/link.sed already exists, use it.  We assume a previous run of
# link.sh has found the correct set of libraries.
#
if test -f auto/link.sed; then
  echo "link.sh: The file 'auto/link.sed' exists, which is going to be used now."
  echo "link.sh: If linking fails, try deleting the auto/link.sed file."
  echo "link.sh: If this fails too, try creating an empty auto/link.sed file."
else

# If linking works with the full link command, try removing some libraries,
# that are known not to be needed on at least one system.
# Remove auto/pathdef.c if there is a new link command and compile it again.
# There is a loop to remove libraries that appear several times.
#
# Notes:
# - Can't remove Xext; It links fine but will give an error when running gvim
#   with Motif.
# - Don't remove the last -lm: On HP-UX Vim links OK but crashes when the GTK
#   GUI is started, because the "floor" symbol could not be resolved.
#
  cat link.cmd
  if sh link.cmd; then
    touch auto/link.sed
    cp link.cmd linkit.sh
    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
      cont=yes
      while test -n "$cont"; do
        if grep "l$libname " linkit.sh >/dev/null; then
          if test ! -f link1.sed; then
            echo "link.sh: OK, linking works, let's try removing a few libraries."
            echo "link.sh: See auto/link.log for details."
            rm -f auto/link.log
          fi
          echo "s/-l$libname  *//" >link1.sed
          sed -f auto/link.sed <link.cmd >linkit2.sh
          sed -f link1.sed <linkit2.sh >linkit.sh
          # keep the last -lm
          if test $libname != "m" || grep "lm " linkit.sh >/dev/null; then
            echo "link.sh: Trying to remove the $libname library..."
            cat linkit.sh >>auto/link.log
            # Redirect this link output, it may contain error messages which
            # should be ignored.
            if sh linkit.sh >>auto/link.log 2>&1; then
              echo "link.sh: We don't need the $libname library!"
              cat link1.sed >>auto/link.sed
              rm -f auto/pathdef.c
            else
              echo "link.sh: We DO need the $libname library."
              cont=
              cp link.cmd linkit.sh
            fi
          else
            cont=
            cp link.cmd linkit.sh
          fi
        else
          cont=
          cp link.cmd linkit.sh
        fi
      done
    done
    if test ! -f auto/pathdef.c; then
      $MAKE objects/pathdef.o
    fi
    if test ! -f link1.sed; then
      echo "link.sh: Linked fine, no libraries can be removed"
      touch link3.sed
    fi
  else
    exit_value=$?
  fi
fi

#
# Now do the real linking.
#
if test -s auto/link.sed; then
  echo "link.sh: Using auto/link.sed file to remove a few libraries"
  sed -f auto/link.sed <link.cmd >linkit.sh
  cat linkit.sh
  if sh linkit.sh; then
    exit_value=0
    echo "link.sh: Linked fine with a few libraries removed"
  else
    exit_value=$?
    echo "link.sh: Linking failed, making auto/link.sed empty and trying again"
    mv -f auto/link.sed link2.sed
    touch auto/link.sed
    rm -f auto/pathdef.c
    $MAKE objects/pathdef.o
  fi
fi
if test -f auto/link.sed -a ! -s auto/link.sed -a ! -f link3.sed; then
  echo "link.sh: Using unmodified link command"
  cat link.cmd
  if sh link.cmd; then
    exit_value=0
    echo "link.sh: Linked OK"
  else
    exit_value=$?
    if test -f link2.sed; then
      echo "link.sh: Linking doesn't work at all, removing auto/link.sed"
      rm -f auto/link.sed
    fi
  fi
fi

#
# cleanup
#
rm -f link.cmd linkit.sh link1.sed link2.sed link3.sed linkit2.sh

#
# return an error code if something went wrong
#
exit $exit_value

# vim:set sw=2 et: