X-Git-Url: https://git.dogcows.com/gitweb?p=chaz%2Fyoink;a=blobdiff_plain;f=link.sh;h=d3a739c519e110d7584a382e3f42dc44549331b3;hp=3519d42dba953a3965274bfac0ceee4ae3af5b52;hb=a1a68666b418fb8f4e5ac16291385505495c372f;hpb=14df8308778d04b49582a29d7a2866c7dbb9ccf9

diff --git a/link.sh b/link.sh
index 3519d42..d3a739c 100755
--- a/link.sh
+++ b/link.sh
@@ -2,141 +2,159 @@
 
 #
 # 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
-# default because there is the potential for runtime linking problems.  If
-# 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.
+# default because there is the potential for runtime linking problems on
+# some platforms.  If 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.
+#
+# 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.
 #
 
-# 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
-#
-# 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
+# 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 .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
 
-# 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