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- #! /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: 2002 Feb 21
- #
- # 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 "$LINK " >link.cmd
- exit_value=0
-
- #
- # If auto/link.sed already exists, use it. We assume a previous run of
- # link.sh has found the correct set of libraries.
- #
- if test -f auto/link.sed; then
- echo "link.sh: The file 'auto/link.sed' exists, which is going to be used now."
- echo "link.sh: If linking fails, try deleting the auto/link.sed file."
- echo "link.sh: If this fails too, try creating an empty auto/link.sed file."
- else
-
- # If linking works with the full link command, try removing some libraries,
- # that are known not to be needed on at least one system.
- # Remove auto/pathdef.c if there is a new link command and compile it again.
- # There is a loop to remove libraries that appear several times.
- #
- # Notes:
- # - Can't remove Xext; It links fine but will give an error when running gvim
- # with Motif.
- # - Don't remove the last -lm: On HP-UX Vim links OK but crashes when the GTK
- # GUI is started, because the "floor" symbol could not be resolved.
- #
- cat link.cmd
- if sh link.cmd; then
- touch auto/link.sed
- cp link.cmd linkit.sh
- for libname in SM ICE nsl dnet dnet_stub inet socket dir elf iconv Xt Xmu Xp Xpm X11 Xdmcp x pthread thread readline m perl crypt attr; do
- cont=yes
- while test -n "$cont"; do
- if grep "l$libname " linkit.sh >/dev/null; then
- if test ! -f link1.sed; then
- echo "link.sh: OK, linking works, let's try removing a few libraries."
- echo "link.sh: See auto/link.log for details."
- rm -f auto/link.log
- fi
- echo "s/-l$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 remove 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: We don't need the $libname library!"
- cat link1.sed >>auto/link.sed
- rm -f auto/pathdef.c
- 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 auto/pathdef.c; then
- $MAKE objects/pathdef.o
- fi
- if test ! -f link1.sed; then
- echo "link.sh: Linked fine, no libraries can be removed"
- touch link3.sed
- fi
- else
- exit_value=$?
- fi
- fi
-
- #
- # Now do the real linking.
- #
- if test -s auto/link.sed; then
- echo "link.sh: Using auto/link.sed file to remove 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 removed"
- 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
-
- #
- # 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:
-