testing new non-autotools build system

[chaz/yoink] / build / link.sh

diff --git a/build/link.sh b/build/link.sh
new file mode 100755 (executable)
index 0000000..d3a739c
--- /dev/null
+++ b/build/link.sh
@@ -0,0 +1,160 @@
+#!/bin/sh
+
+#
+# Yoink
+# 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 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.
+#
+
+
+# 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 \
+       $THE_END"
+
+
+linkdir=".link"
+logfile="$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
+
+
+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 $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 $sedfile
+               fi
+       fi
+fi
+
+
+rm -rf "$workdir"
+exit $exitcode
+