1#! /bin/sh 2# 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. 6# 7# Author: Bram Moolenaar 8# Last change: 2006 Sep 26 9# License: Public domain 10# 11# Warning: This fails miserably if the linker doesn't return an error code! 12# 13# Otherwise this script is fail-safe, falling back to the original full link 14# command if anything fails. 15 16echo "$LINK " >link.cmd 17exit_value=0 18 19# 20# If auto/link.sed already exists, use it. We assume a previous run of 21# link.sh has found the correct set of libraries. 22# 23if test -f auto/link.sed; then 24 echo "link.sh: The file 'auto/link.sed' exists, which is going to be used now." 25 echo "link.sh: If linking fails, try deleting the auto/link.sed file." 26 echo "link.sh: If this fails too, try creating an empty auto/link.sed file." 27else 28 29# If linking works with the full link command, try removing some libraries, 30# that are known not to be needed on at least one system. 31# Remove auto/pathdef.c if there is a new link command and compile it again. 32# There is a loop to remove libraries that appear several times. 33# 34# Notes: 35# - Can't remove Xext; It links fine but will give an error when running gvim 36# with Motif. 37# - Don't remove the last -lm: On HP-UX Vim links OK but crashes when the GTK 38# GUI is started, because the "floor" symbol could not be resolved. 39# 40 cat link.cmd 41 if sh link.cmd; then 42 touch auto/link.sed 43 cp link.cmd linkit.sh 44 for libname in SM ICE nsl dnet dnet_stub inet socket dir elf iconv Xt Xmu Xp Xpm X11 Xdmcp x w perl dl pthread thread readline m crypt attr; do 45 cont=yes 46 while test -n "$cont"; do 47 if grep "l$libname " linkit.sh >/dev/null; then 48 if test ! -f link1.sed; then 49 echo "link.sh: OK, linking works, let's try omitting a few libraries." 50 echo "link.sh: See auto/link.log for details." 51 rm -f auto/link.log 52 fi 53 echo "s/-l$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 omit 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: Vim doesn't need the $libname library!" 64 cat link1.sed >>auto/link.sed 65 rm -f auto/pathdef.c 66 else 67 echo "link.sh: Vim DOES need the $libname library." 68 cont= 69 cp link.cmd linkit.sh 70 fi 71 else 72 cont= 73 cp link.cmd linkit.sh 74 fi 75 else 76 cont= 77 cp link.cmd linkit.sh 78 fi 79 done 80 done 81 if test ! -f auto/pathdef.c; then 82 $MAKE objects/pathdef.o 83 fi 84 if test ! -f link1.sed; then 85 echo "link.sh: Linked fine, no libraries can be omitted" 86 touch link3.sed 87 fi 88 else 89 exit_value=$? 90 fi 91fi 92 93# 94# Now do the real linking. 95# 96if test -s auto/link.sed; then 97 echo "link.sh: Using auto/link.sed file to omit 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 omitted" 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 $MAKE objects/pathdef.o 110 fi 111fi 112if test -f auto/link.sed -a ! -s auto/link.sed -a ! -f link3.sed; then 113 echo "link.sh: Using unmodified link command" 114 cat link.cmd 115 if sh link.cmd; then 116 exit_value=0 117 echo "link.sh: Linked OK" 118 else 119 exit_value=$? 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 123 fi 124 fi 125fi 126 127# 128# cleanup 129# 130rm -f link.cmd linkit.sh link1.sed link2.sed link3.sed linkit2.sh 131 132# 133# return an error code if something went wrong 134# 135exit $exit_value 136 137# vim:set sw=2 et: 138