Merged from the latest developing branch.
[MacVim.git] / src / link.sh
blobdc376d521397b05f5cc4604cdc3e22b49f192933
1 #! /bin/sh
3 # link.sh -- try linking Vim with different sets of libraries, finding the
4 # minimal set for fastest startup. The problem is that configure adds a few
5 # libraries when they exist, but this doesn't mean they are needed for Vim.
7 # Author: Bram Moolenaar
8 # Last change: 2006 Sep 26
9 # License: Public domain
11 # Warning: This fails miserably if the linker doesn't return an error code!
13 # Otherwise this script is fail-safe, falling back to the original full link
14 # command if anything fails.
16 echo "$LINK " >link.cmd
17 exit_value=0
20 # If auto/link.sed already exists, use it. We assume a previous run of
21 # link.sh has found the correct set of libraries.
23 if test -f auto/link.sed; then
24 echo "link.sh: The file 'auto/link.sed' exists, which is going to be used now."
25 echo "link.sh: If linking fails, try deleting the auto/link.sed file."
26 echo "link.sh: If this fails too, try creating an empty auto/link.sed file."
27 else
29 # If linking works with the full link command, try removing some libraries,
30 # that are known not to be needed on at least one system.
31 # Remove auto/pathdef.c if there is a new link command and compile it again.
32 # There is a loop to remove libraries that appear several times.
34 # Notes:
35 # - Can't remove Xext; It links fine but will give an error when running gvim
36 # with Motif.
37 # - Don't remove the last -lm: On HP-UX Vim links OK but crashes when the GTK
38 # GUI is started, because the "floor" symbol could not be resolved.
40 cat link.cmd
41 if sh link.cmd; then
42 touch auto/link.sed
43 cp link.cmd linkit.sh
44 for libname in SM ICE nsl dnet dnet_stub inet socket dir elf iconv Xt Xmu Xp Xpm X11 Xdmcp x w dl pthread thread readline m perl crypt attr; do
45 cont=yes
46 while test -n "$cont"; do
47 if grep "l$libname " linkit.sh >/dev/null; then
48 if test ! -f link1.sed; then
49 echo "link.sh: OK, linking works, let's try removing a few libraries."
50 echo "link.sh: See auto/link.log for details."
51 rm -f auto/link.log
53 echo "s/-l$libname *//" >link1.sed
54 sed -f auto/link.sed <link.cmd >linkit2.sh
55 sed -f link1.sed <linkit2.sh >linkit.sh
56 # keep the last -lm
57 if test $libname != "m" || grep "lm " linkit.sh >/dev/null; then
58 echo "link.sh: Trying to remove the $libname library..."
59 cat linkit.sh >>auto/link.log
60 # Redirect this link output, it may contain error messages which
61 # should be ignored.
62 if sh linkit.sh >>auto/link.log 2>&1; then
63 echo "link.sh: We don't need the $libname library!"
64 cat link1.sed >>auto/link.sed
65 rm -f auto/pathdef.c
66 else
67 echo "link.sh: We DO need the $libname library."
68 cont=
69 cp link.cmd linkit.sh
71 else
72 cont=
73 cp link.cmd linkit.sh
75 else
76 cont=
77 cp link.cmd linkit.sh
79 done
80 done
81 if test ! -f auto/pathdef.c; then
82 $MAKE objects/pathdef.o
84 if test ! -f link1.sed; then
85 echo "link.sh: Linked fine, no libraries can be removed"
86 touch link3.sed
88 else
89 exit_value=$?
94 # Now do the real linking.
96 if test -s auto/link.sed; then
97 echo "link.sh: Using auto/link.sed file to remove a few libraries"
98 sed -f auto/link.sed <link.cmd >linkit.sh
99 cat linkit.sh
100 if sh linkit.sh; then
101 exit_value=0
102 echo "link.sh: Linked fine with a few libraries removed"
103 else
104 exit_value=$?
105 echo "link.sh: Linking failed, making auto/link.sed empty and trying again"
106 mv -f auto/link.sed link2.sed
107 touch auto/link.sed
108 rm -f auto/pathdef.c
109 $MAKE objects/pathdef.o
112 if test -f auto/link.sed -a ! -s auto/link.sed -a ! -f link3.sed; then
113 echo "link.sh: Using unmodified link command"
114 cat link.cmd
115 if sh link.cmd; then
116 exit_value=0
117 echo "link.sh: Linked OK"
118 else
119 exit_value=$?
120 if test -f link2.sed; then
121 echo "link.sh: Linking doesn't work at all, removing auto/link.sed"
122 rm -f auto/link.sed
128 # cleanup
130 rm -f link.cmd linkit.sh link1.sed link2.sed link3.sed linkit2.sh
133 # return an error code if something went wrong
135 exit $exit_value
137 # vim:set sw=2 et: