#
# Yoink
-# Execute this file to link the executable with fewer direct dependencies.
+# Run this script to link the executable with fewer direct dependencies.
#
# You shouldn't call this directly; instead, use the configure script's
# --enable-link-sh option and run make normally. This isn't enabled by
# you have a newer version of GCC, you should prefer the --as-needed linker
# flag over this method, though they both should accomplish the same thing.
#
-
-# 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: 2006 Sep 26
-# License: Public domain
+# This script was adapted from some public domain code written by Bram
+# Moolenaar for Vim. The only input needed is the link command in the
+# variable LINK. It is expected that the linker will return an error code
+# or this will not work. The script caches the test results in the
+# `.link/link.sed' file; delete that file if you want to redetermine the
+# required direct dependencies.
#
-# 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.cmd
-exit_value=0
-#
-# If .link/link.sed already exists, use it. We assume a previous run of
-# link.sh has found the correct set of libraries.
-#
-if test -f .link/link.sed; then
- echo "link.sh: The file '.link/link.sed' exists, which is going to be used now."
- echo "link.sh: If linking fails, try deleting the .link/link.sed file."
- echo "link.sh: If this fails too, try creating an empty .link/link.sed file."
-else
+# List here any libraries that are known to not be needed on some platform.
+libraries="\
+ atk-1.0 \
+ cairo \
+ fontconfig \
+ freetype \
+ gdk-x11-2.0 \
+ gio-2.0 \
+ glib-2.0 \
+ gmodule-2.0 \
+ ogg \
+ pango-1.0 \
+ pangocairo-1.0 \
+ pangoft2-1.0 \
+ pthread \
+ vorbis \
+ $THE_END"
-# If linking works with the full link command, try removing some libraries,
-# that are known not to be needed on at least one system.
-# Remove .link/pathdef.c if there is a new link command and compile it again.
-# There is a loop to remove libraries that appear several times.
-#
-# Notes:
-# - Can't remove Xext; It links fine but will give an error when running gvim
-# with Motif.
-# - Don't remove the last -lm: On HP-UX Vim links OK but crashes when the GTK
-# GUI is started, because the "floor" symbol could not be resolved.
-#
- cat link.cmd
- if sh link.cmd; then
- mkdir -p .link
- touch .link/link.sed
- cp link.cmd linkit.sh
- for libname in atk-1.0 cairo fontconfig freetype gdk-x11-2.0 gio-2.0 glib-2.0 gmodule-2.0 ogg pango-1.0 pangocairo-1.0 pangoft2-1.0 vorbis; do
- cont=yes
- while test -n "$cont"; do
- if grep "l$libname " linkit.sh >/dev/null; then
- if test ! -f link1.sed; then
- echo "link.sh: OK, linking works, let's try removing a few libraries."
- echo "link.sh: See .link/link.log for details."
- rm -f .link/link.log
- fi
- echo "s/-l$libname *//" >link1.sed
- sed -f .link/link.sed <link.cmd >linkit2.sh
- sed -f link1.sed <linkit2.sh >linkit.sh
- # keep the last -lm
- if test $libname != "m" || grep "lm " linkit.sh >/dev/null; then
- echo "link.sh: Trying to remove the $libname library..."
- cat linkit.sh >>.link/link.log
- # Redirect this link output, it may contain error messages which
- # should be ignored.
- if sh linkit.sh >>.link/link.log 2>&1; then
- echo "link.sh: We don't need the $libname library!"
- cat link1.sed >>.link/link.sed
- else
- echo "link.sh: We DO need the $libname library."
- cont=
- cp link.cmd linkit.sh
- fi
- else
- cont=
- cp link.cmd linkit.sh
- fi
- else
- cont=
- cp link.cmd linkit.sh
- fi
- done
- done
- if test ! -f link1.sed; then
- echo "link.sh: Linked fine, no libraries can be removed"
- touch link3.sed
- fi
- else
- exit_value=$?
- fi
+
+linkdir=".link"
+logfile="$linkdir/link.log"
+sedfile="$linkdir/link.sed"
+
+workdir=$(mktemp -d tmp.XXXXXXXX)
+cmdfile="$workdir/link.cmd"
+runfile="$workdir/link.run"
+
+tmpfile1="$workdir/link.tmp1"
+tmpfile2="$workdir/link.tmp2"
+tmpfile3="$workdir/link.tmp3"
+
+
+printlog()
+{
+ echo "link.sh: $@"
+}
+
+echo "$LINK " >$cmdfile
+exitcode=0
+
+
+if test -f $sedfile
+then
+ printlog "The file $sedfile exists, which is now going to be used."
+ printlog "If linking fails, try deleting the $sedfile file."
+ printlog "If that fails, try creating an empty $sedfile file."
+ printlog "If that fails, configure the package with --disable-link-sh."
+else
+ cat $cmdfile
+ if sh $cmdfile
+ then
+ mkdir -p $linkdir
+ touch $sedfile
+ cp $cmdfile $runfile
+ for libname in $libraries
+ do
+ cont=yes
+ while test -n "$cont"
+ do
+ if grep "l$libname " $runfile >/dev/null
+ then
+ if test ! -f $tmpfile1
+ then
+ printlog "Full linking works; now the fun begins."
+ printlog "See $logfile for details."
+ rm -f $logfile
+ fi
+ echo "s/-l$libname *//" >$tmpfile1
+ sed -f $sedfile <$cmdfile | sed -f $tmpfile1 >$runfile
+ # keep the last -lm; this is supposedly needed by HP-UX
+ if test $libname != "m" || grep "lm " $runfile >/dev/null
+ then
+ printlog "Trying to remove the $libname library..."
+ cat $runfile >>$logfile
+ if sh $runfile >>$logfile 2>&1
+ then
+ printlog "We don't need the $libname library!"
+ cat $tmpfile1 >>$sedfile
+ continue
+ else
+ printlog "We DO need the $libname library."
+ fi
+ fi
+ fi
+ cont=
+ cp $cmdfile $runfile
+ done
+ done
+ if test ! -f $tmpfile1
+ then
+ printlog "Linked fine, no libraries can be removed."
+ touch $tmpfile3
+ fi
+ else
+ exitcode=$?
+ fi
fi
-#
-# Now do the real linking.
-#
-if test -s .link/link.sed; then
- echo "link.sh: Using .link/link.sed file to remove a few libraries"
- sed -f .link/link.sed <link.cmd >linkit.sh
- cat linkit.sh
- if sh linkit.sh; then
- exit_value=0
- echo "link.sh: Linked fine with a few libraries removed"
- else
- exit_value=$?
- echo "link.sh: Linking failed, making .link/link.sed empty and trying again"
- mv -f .link/link.sed link2.sed
- touch .link/link.sed
- fi
+
+if test -s $sedfile
+then
+ printlog "Using $sedfile file to remove a few libraries."
+ sed -f $sedfile <$cmdfile >$runfile
+ cat $runfile
+ if sh $runfile
+ then
+ exitcode=0
+ printlog "Linked fine with a few libraries removed."
+ else
+ exitcode=$?
+ printlog "Linking failed, making $sedfile empty and trying again."
+ mv -f $sedfile $tmpfile2
+ touch $sedfile
+ fi
fi
-if test -f .link/link.sed -a ! -s .link/link.sed -a ! -f link3.sed; then
- echo "link.sh: Using unmodified link command"
- cat link.cmd
- if sh link.cmd; then
- exit_value=0
- echo "link.sh: Linked OK"
- else
- exit_value=$?
- if test -f link2.sed; then
- echo "link.sh: Linking doesn't work at all, removing .link/link.sed"
- rm -f .link/link.sed
- fi
- fi
+
+if test -f $sedfile -a ! -s $sedfile -a ! -f $tmpfile3
+then
+ printlog "Using unmodified link command."
+ cat $cmdfile
+ if sh $cmdfile
+ then
+ exitcode=0
+ printlog "Linked OK."
+ else
+ exitcode=$?
+ if test -f $tmpfile2
+ then
+ printlog "Linking doesn't work at all, removing $sedfile."
+ rm -f $sedfile
+ fi
+ fi
fi
-#
-# cleanup
-#
-rm -f link.cmd linkit.sh link1.sed link2.sed link3.sed linkit2.sh
-#
-# return an error code if something went wrong
-#
-exit $exit_value
+rm -rf "$workdir"
+exit $exitcode
projects / chaz / yoink / commitdiff
