mirror of
https://github.com/sheumann/hush.git
synced 2024-12-22 14:30:31 +00:00
69 lines
2.5 KiB
Bash
Executable File
69 lines
2.5 KiB
Bash
Executable File
#!/bin/sh
|
|
|
|
debug=false
|
|
|
|
try() {
|
|
added="$1"
|
|
shift
|
|
$debug && echo "Trying: $* $added"
|
|
"$@" $added 2>busybox_ld.err
|
|
}
|
|
|
|
# Sanitize lib list (dups, extra spaces etc)
|
|
#echo "BBOX_LIB_LIST=$BBOX_LIB_LIST"
|
|
BBOX_LIB_LIST=`echo "$BBOX_LIB_LIST" | xargs -n1 | sort | uniq | xargs`
|
|
|
|
# First link with all libs. If it fails, bail out
|
|
echo "Trying libraries: $BBOX_LIB_LIST"
|
|
l_list=`echo "$BBOX_LIB_LIST" | sed -e 's/ / -l/g' -e 's/^/-l/' -e 's/^-l$//'`
|
|
test "x$l_list" != "x" && l_list="-Wl,--start-group $l_list -Wl,--end-group"
|
|
try "$l_list" "$@" \
|
|
|| {
|
|
echo "Failed: $* -Wl,--start-group $l_list -Wl,--end-group"
|
|
cat busybox_ld.err
|
|
exit 1
|
|
}
|
|
|
|
# Now try to remove each lib and build without it.
|
|
# Stop when no lib can be removed.
|
|
while test "$BBOX_LIB_LIST"; do
|
|
$debug && echo "Trying libraries: $BBOX_LIB_LIST"
|
|
all_needed=true
|
|
for one in $BBOX_LIB_LIST; do
|
|
without_one=`echo " $BBOX_LIB_LIST " | sed "s/ $one / /g" | xargs`
|
|
l_list=`echo "$without_one" | sed -e 's/ / -l/g' -e 's/^/-l/' -e 's/^-l$//'`
|
|
test "x$l_list" != "x" && l_list="-Wl,--start-group $l_list -Wl,--end-group"
|
|
$debug && echo "Trying -l options: '$l_list'"
|
|
if try "$l_list" "$@"; then
|
|
echo "Library $one is not needed"
|
|
BBOX_LIB_LIST="$without_one"
|
|
all_needed=false
|
|
else
|
|
echo "Library $one is needed"
|
|
fi
|
|
done
|
|
# All libs were needed, can't remove any
|
|
$all_needed && break
|
|
# If there is no space char, the list has just one lib.
|
|
# I'm not sure that in this case lib really is 100% needed.
|
|
# Let's try linking without it anyway... thus commented out.
|
|
#{ echo "$BBOX_LIB_LIST" | grep -q ' '; } || break
|
|
done
|
|
|
|
# Make the binary with final, minimal list of libs
|
|
echo "Final link with: $BBOX_LIB_LIST"
|
|
l_list=`echo "$BBOX_LIB_LIST" | sed -e 's/ / -l/g' -e 's/^/-l/' -e 's/^-l$//'`
|
|
test "x$l_list" != "x" && l_list="-Wl,--start-group $l_list -Wl,--end-group -Wl,--verbose"
|
|
# --verbose gives us gobs of info to stdout (e.g. linker script used)
|
|
if ! test -f busybox_ldscript; then
|
|
try "$l_list -Wl,--verbose" "$@" >busybox_ld.out
|
|
else
|
|
echo "Custom linker script 'busybox_ldscript' found, using it"
|
|
# Add SORT_BY_ALIGNMENT to linker script (found in busybox_ld.out):
|
|
# .rodata : { *(.rodata SORT_BY_ALIGNMENT(.rodata.*) .gnu.linkonce.r.*) }
|
|
# *(.data SORT_BY_ALIGNMENT(.data.*) .gnu.linkonce.d.*)
|
|
# *(.bss SORT_BY_ALIGNMENT(.bss.*) .gnu.linkonce.b.*)
|
|
# This will eliminate most of the data padding (~3kb).
|
|
try "$l_list -Wl,--verbose -Wl,-T -Wl,busybox_ldscript" "$@" >busybox_ld.out
|
|
fi
|