diff options
Diffstat (limited to 'src/link.sh')
| -rwxr-xr-x | src/link.sh | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/link.sh b/src/link.sh new file mode 100755 index 0000000..e4030de --- /dev/null +++ b/src/link.sh @@ -0,0 +1,152 @@ +#! /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: 2010 Nov 03 +# License: Public domain +# +# 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 "$LINK " >link_$PROG.cmd +exit_value=0 + +if test "$LINK_AS_NEEDED" = yes; then + echo "link.sh: \$LINK_AS_NEEDED set to 'yes': invoking linker directly." + cat link_$PROG.cmd + if sh link_$PROG.cmd; then + exit_value=0 + echo "link.sh: Linked fine" + else + exit_value=$? + echo "link.sh: Linking failed" + fi +else + if test -f auto/link.sed; then + +# +# If auto/link.sed already exists, use it. We assume a previous run of +# link.sh has found the correct set of libraries. +# + 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_$PROG.cmd + if sh link_$PROG.cmd; then + touch auto/link.sed + cp link_$PROG.cmd linkit_$PROG.sh + 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 + cont=yes + while test -n "$cont"; do + if grep "l$libname " linkit_$PROG.sh >/dev/null; then + if test ! -f link1_$PROG.sed; then + echo "link.sh: OK, linking works, let's try omitting a few libraries." + echo "link.sh: See auto/link.log for details." + rm -f auto/link.log + fi + echo "s/-l$libname *//" >link1_$PROG.sed + sed -f auto/link.sed <link_$PROG.cmd >linkit2_$PROG.sh + sed -f link1_$PROG.sed <linkit2_$PROG.sh >linkit_$PROG.sh + # keep the last -lm + if test $libname != "m" || grep "lm " linkit_$PROG.sh >/dev/null; then + echo "link.sh: Trying to omit the $libname library..." + cat linkit_$PROG.sh >>auto/link.log + # Redirect this link output, it may contain error messages which + # should be ignored. + if sh linkit_$PROG.sh >>auto/link.log 2>&1; then + echo "link.sh: Vim doesn't need the $libname library!" + cat link1_$PROG.sed >>auto/link.sed + rm -f auto/pathdef.c + else + echo "link.sh: Vim DOES need the $libname library." + cont= + cp link_$PROG.cmd linkit_$PROG.sh + fi + else + cont= + cp link_$PROG.cmd linkit_$PROG.sh + fi + else + cont= + cp link_$PROG.cmd linkit_$PROG.sh + fi + done + done + if test ! -f auto/pathdef.c; then + $MAKE objects/pathdef.o + fi + if test ! -f link1_$PROG.sed; then + echo "link.sh: Linked fine, no libraries can be omitted" + touch link3_$PROG.sed + fi + else + exit_value=$? + fi +fi + +# +# Now do the real linking. +# +if test -s auto/link.sed; then + echo "link.sh: Using auto/link.sed file to omit a few libraries" + sed -f auto/link.sed <link_$PROG.cmd >linkit_$PROG.sh + cat linkit_$PROG.sh + if sh linkit_$PROG.sh; then + exit_value=0 + echo "link.sh: Linked fine with a few libraries omitted" + else + exit_value=$? + echo "link.sh: Linking failed, making auto/link.sed empty and trying again" + mv -f auto/link.sed link2_$PROG.sed + touch auto/link.sed + rm -f auto/pathdef.c + $MAKE objects/pathdef.o + fi +fi +if test -f auto/link.sed -a ! -s auto/link.sed -a ! -f link3_$PROG.sed; then + echo "link.sh: Using unmodified link command" + cat link_$PROG.cmd + if sh link_$PROG.cmd; then + exit_value=0 + echo "link.sh: Linked OK" + else + exit_value=$? + if test -f link2_$PROG.sed; then + echo "link.sh: Linking doesn't work at all, removing auto/link.sed" + rm -f auto/link.sed + fi + fi +fi + +fi + +# +# cleanup +# +rm -f link_$PROG.cmd linkit_$PROG.sh link1_$PROG.sed link2_$PROG.sed \ + link3_$PROG.sed linkit2_$PROG.sh + +# +# return an error code if something went wrong +# +exit $exit_value + +# vim:set sw=2 et: |