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: 2010 Nov 03
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 "$LINK " >link.cmd
19 if test "$LINK_AS_NEEDED" = yes; then
20 echo "link.sh: \$LINK_AS_NEEDED set to 'yes': invoking linker directly."
24 echo "link.sh: Linked fine"
27 echo "link.sh: Linking failed"
30 if test -f auto/link.sed; then
33 # If auto/link.sed already exists, use it. We assume a previous run of
34 # link.sh has found the correct set of libraries.
36 echo "link.sh: The file 'auto/link.sed' exists, which is going to be used now."
37 echo "link.sh: If linking fails, try deleting the auto/link.sed file."
38 echo "link.sh: If this fails too, try creating an empty auto/link.sed file."
41 # If linking works with the full link command, try removing some libraries,
42 # that are known not to be needed on at least one system.
43 # Remove auto/pathdef.c if there is a new link command and compile it again.
44 # There is a loop to remove libraries that appear several times.
47 # - Can't remove Xext; It links fine but will give an error when running gvim
49 # - Don't remove the last -lm: On HP-UX Vim links OK but crashes when the GTK
50 # GUI is started, because the "floor" symbol could not be resolved.
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
58 while test -n "$cont"; do
59 if grep "l$libname " linkit.sh >/dev/null; then
60 if test ! -f link1.sed; then
61 echo "link.sh: OK, linking works, let's try omitting a few libraries."
62 echo "link.sh: See auto/link.log for details."
65 echo "s/-l$libname *//" >link1.sed
66 sed -f auto/link.sed <link.cmd >linkit2.sh
67 sed -f link1.sed <linkit2.sh >linkit.sh
69 if test $libname != "m" || grep "lm " linkit.sh >/dev/null; then
70 echo "link.sh: Trying to omit the $libname library..."
71 cat linkit.sh >>auto/link.log
72 # Redirect this link output, it may contain error messages which
74 if sh linkit.sh >>auto/link.log 2>&1; then
75 echo "link.sh: Vim doesn't need the $libname library!"
76 cat link1.sed >>auto/link.sed
79 echo "link.sh: Vim DOES need the $libname library."
93 if test ! -f auto/pathdef.c; then
94 $MAKE objects/pathdef.o
96 if test ! -f link1.sed; then
97 echo "link.sh: Linked fine, no libraries can be omitted"
106 # Now do the real linking.
108 if test -s auto/link.sed; then
109 echo "link.sh: Using auto/link.sed file to omit a few libraries"
110 sed -f auto/link.sed <link.cmd >linkit.sh
112 if sh linkit.sh; then
114 echo "link.sh: Linked fine with a few libraries omitted"
117 echo "link.sh: Linking failed, making auto/link.sed empty and trying again"
118 mv -f auto/link.sed link2.sed
121 $MAKE objects/pathdef.o
124 if test -f auto/link.sed -a ! -s auto/link.sed -a ! -f link3.sed; then
125 echo "link.sh: Using unmodified link command"
129 echo "link.sh: Linked OK"
132 if test -f link2.sed; then
133 echo "link.sh: Linking doesn't work at all, removing auto/link.sed"
144 rm -f link.cmd linkit.sh link1.sed link2.sed link3.sed linkit2.sh
147 # return an error code if something went wrong