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: 2010 Nov 03 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 "$LINK " >link.cmd 17exit_value=0 18 19if test "$LINK_AS_NEEDED" = yes; then 20 echo "link.sh: \$LINK_AS_NEEDED set to 'yes': invoking linker directly." 21 cat link.cmd 22 if sh link.cmd; then 23 exit_value=0 24 echo "link.sh: Linked fine" 25 else 26 exit_value=$? 27 echo "link.sh: Linking failed" 28 fi 29else 30 if test -f auto/link.sed; then 31 32# 33# If auto/link.sed already exists, use it. We assume a previous run of 34# link.sh has found the correct set of libraries. 35# 36 echo "link.sh: The file 'auto/link.sed' exists, which is going to be used now." 37 echo "link.sh: If linking fails, try deleting the auto/link.sed file." 38 echo "link.sh: If this fails too, try creating an empty auto/link.sed file." 39else 40 41# If linking works with the full link command, try removing some libraries, 42# that are known not to be needed on at least one system. 43# Remove auto/pathdef.c if there is a new link command and compile it again. 44# There is a loop to remove libraries that appear several times. 45# 46# Notes: 47# - Can't remove Xext; It links fine but will give an error when running gvim 48# with Motif. 49# - Don't remove the last -lm: On HP-UX Vim links OK but crashes when the GTK 50# GUI is started, because the "floor" symbol could not be resolved. 51# 52 cat link.cmd 53 if sh link.cmd; then 54 touch auto/link.sed 55 cp link.cmd linkit.sh 56 for libname in SM ICE nsl dnet dnet_stub inet socket dir elf iconv Xt Xmu Xp Xpm X11 Xdmcp x w perl dl pthread thread readline m crypt attr; do 57 cont=yes 58 while test -n "$cont"; do 59 if grep "l$libname " linkit.sh >/dev/null; then 60 if test ! -f link1.sed; then 61 echo "link.sh: OK, linking works, let's try omitting a few libraries." 62 echo "link.sh: See auto/link.log for details." 63 rm -f auto/link.log 64 fi 65 echo "s/-l$libname *//" >link1.sed 66 sed -f auto/link.sed <link.cmd >linkit2.sh 67 sed -f link1.sed <linkit2.sh >linkit.sh 68 # keep the last -lm 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 73 # should be ignored. 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 77 rm -f auto/pathdef.c 78 else 79 echo "link.sh: Vim DOES need the $libname library." 80 cont= 81 cp link.cmd linkit.sh 82 fi 83 else 84 cont= 85 cp link.cmd linkit.sh 86 fi 87 else 88 cont= 89 cp link.cmd linkit.sh 90 fi 91 done 92 done 93 if test ! -f auto/pathdef.c; then 94 $MAKE objects/pathdef.o 95 fi 96 if test ! -f link1.sed; then 97 echo "link.sh: Linked fine, no libraries can be omitted" 98 touch link3.sed 99 fi 100 else 101 exit_value=$? 102 fi 103fi 104 105# 106# Now do the real linking. 107# 108if 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 111 cat linkit.sh 112 if sh linkit.sh; then 113 exit_value=0 114 echo "link.sh: Linked fine with a few libraries omitted" 115 else 116 exit_value=$? 117 echo "link.sh: Linking failed, making auto/link.sed empty and trying again" 118 mv -f auto/link.sed link2.sed 119 touch auto/link.sed 120 rm -f auto/pathdef.c 121 $MAKE objects/pathdef.o 122 fi 123fi 124if test -f auto/link.sed -a ! -s auto/link.sed -a ! -f link3.sed; then 125 echo "link.sh: Using unmodified link command" 126 cat link.cmd 127 if sh link.cmd; then 128 exit_value=0 129 echo "link.sh: Linked OK" 130 else 131 exit_value=$? 132 if test -f link2.sed; then 133 echo "link.sh: Linking doesn't work at all, removing auto/link.sed" 134 rm -f auto/link.sed 135 fi 136 fi 137fi 138 139fi 140 141# 142# cleanup 143# 144rm -f link.cmd linkit.sh link1.sed link2.sed link3.sed linkit2.sh 145 146# 147# return an error code if something went wrong 148# 149exit $exit_value 150 151# vim:set sw=2 et: 152