summaryrefslogtreecommitdiffstats
path: root/src/link.sh
diff options
context:
space:
mode:
Diffstat (limited to 'src/link.sh')
-rwxr-xr-xsrc/link.sh151
1 files changed, 151 insertions, 0 deletions
diff --git a/src/link.sh b/src/link.sh
new file mode 100755
index 0000000..71ee061
--- /dev/null
+++ b/src/link.sh
@@ -0,0 +1,151 @@
+#! /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 "$LINK " >link.cmd
+exit_value=0
+
+if test "$LINK_AS_NEEDED" = yes; then
+ echo "link.sh: \$LINK_AS_NEEDED set to 'yes': invoking linker directly."
+ cat link.cmd
+ if sh link.cmd; then
+ exit_value=0
+ echo "link.sh: Linked fine"
+ else
+ exit_value=$?
+ echo "link.sh: Linking failed"
+ fi
+else
+ if test -f auto/link.sed; then
+
+#
+# If auto/link.sed already exists, use it. We assume a previous run of
+# link.sh has found the correct set of libraries.
+#
+ echo "link.sh: The file 'auto/link.sed' exists, which is going to be used now."
+ echo "link.sh: If linking fails, try deleting the auto/link.sed file."
+ echo "link.sh: If this fails too, try creating an empty auto/link.sed file."
+else
+
+# If linking works with the full link command, try removing some libraries,
+# that are known not to be needed on at least one system.
+# Remove auto/pathdef.c if there is a new link command and compile it again.
+# There is a loop to remove libraries that appear several times.
+#
+# Notes:
+# - Can't remove Xext; It links fine but will give an error when running gvim
+# with Motif.
+# - Don't remove the last -lm: On HP-UX Vim links OK but crashes when the GTK
+# GUI is started, because the "floor" symbol could not be resolved.
+#
+ cat link.cmd
+ if sh link.cmd; then
+ touch auto/link.sed
+ cp link.cmd linkit.sh
+ for libname in SM ICE nsl dnet dnet_stub inet socket dir elf iconv Xt Xmu Xp Xpm X11 Xdmcp x w perl dl pthread thread readline m crypt attr; do
+ cont=yes
+ while test -n "$cont"; do
+ if grep "l$libname " linkit.sh >/dev/null; then
+ if test ! -f link1.sed; then
+ echo "link.sh: OK, linking works, let's try omitting a few libraries."
+ echo "link.sh: See auto/link.log for details."
+ rm -f auto/link.log
+ fi
+ echo "s/-l$libname *//" >link1.sed
+ sed -f auto/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 omit the $libname library..."
+ cat linkit.sh >>auto/link.log
+ # Redirect this link output, it may contain error messages which
+ # should be ignored.
+ if sh linkit.sh >>auto/link.log 2>&1; then
+ echo "link.sh: Vim doesn't need the $libname library!"
+ cat link1.sed >>auto/link.sed
+ rm -f auto/pathdef.c
+ else
+ echo "link.sh: Vim DOES 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 auto/pathdef.c; then
+ $MAKE objects/pathdef.o
+ fi
+ if test ! -f link1.sed; then
+ echo "link.sh: Linked fine, no libraries can be omitted"
+ touch link3.sed
+ fi
+ else
+ exit_value=$?
+ 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.cmd >linkit.sh
+ cat linkit.sh
+ if sh linkit.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.sed
+ touch auto/link.sed
+ rm -f auto/pathdef.c
+ $MAKE objects/pathdef.o
+ fi
+fi
+if test -f auto/link.sed -a ! -s auto/link.sed -a ! -f link3.sed; then
+ echo "link.sh: Using unmodified link command"
+ cat link.cmd
+ if sh link.cmd; then
+ exit_value=0
+ echo "link.sh: Linked OK"
+ else
+ exit_value=$?
+ if test -f link2.sed; then
+ echo "link.sh: Linking doesn't work at all, removing auto/link.sed"
+ rm -f auto/link.sed
+ fi
+ 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
+
+# vim:set sw=2 et: