8 $debug && echo "Trying: $* $added"
9 "$@" $added 2>busybox_ld.err
12 # Sanitize lib list (dups, extra spaces etc)
13 #echo "BBOX_LIB_LIST=$BBOX_LIB_LIST"
14 BBOX_LIB_LIST=`echo "$BBOX_LIB_LIST" | xargs -n1 | sort | uniq | xargs`
16 # First link with all libs. If it fails, bail out
17 l_list=`echo "$BBOX_LIB_LIST" | sed -e 's/ / -l/g' -e 's/^/-l/' -e 's/^-l$//'`
19 echo "Trying libraries: $BBOX_LIB_LIST"
20 test "x$l_list" != "x" && l_list="-Wl,--start-group $l_list -Wl,--end-group"
23 echo "Failed: $* -Wl,--start-group $l_list -Wl,--end-group"
28 #### Hack disabled: conflicts with ld --verbose flag in last link phase
30 ##### Hack: we are not supposed to know executable name,
31 ##### but this hack cuts down link time
32 ####mv busybox_unstripped busybox_unstripped.tmp
33 ####mv busybox.map busybox.map.tmp
35 # Now try to remove each lib and build without it.
36 # Stop when no lib can be removed.
37 ####ever_discarded=false
38 while test "$BBOX_LIB_LIST"; do
39 $debug && echo "Trying libraries: $BBOX_LIB_LIST"
41 for one in $BBOX_LIB_LIST; do
42 without_one=`echo " $BBOX_LIB_LIST " | sed "s/ $one / /g" | xargs`
43 l_list=`echo "$without_one" | sed -e 's/ / -l/g' -e 's/^/-l/' -e 's/^-l$//'`
44 test "x$l_list" != "x" && l_list="-Wl,--start-group $l_list -Wl,--end-group"
45 $debug && echo "Trying -l options: '$l_list'"
46 if try "$l_list" "$@"; then
47 echo "Library $one is not needed"
48 BBOX_LIB_LIST="$without_one"
50 #### ever_discarded=true
52 echo "Library $one is needed"
55 # All libs were needed, can't remove any
57 # If there is no space char, the list has just one lib.
58 # I'm not sure that in this case lib really is 100% needed.
59 # Let's try linking without it anyway... thus commented out.
60 #{ echo "$BBOX_LIB_LIST" | grep -q ' '; } || break
63 ####mv busybox_unstripped.tmp busybox_unstripped
64 ####mv busybox.map.tmp busybox.map
65 ####$ever_discarded && {
66 # Make the binary with final, minimal list of libs
67 echo "Final link with: $BBOX_LIB_LIST"
68 l_list=`echo "$BBOX_LIB_LIST" | sed -e 's/ / -l/g' -e 's/^/-l/' -e 's/^-l$//'`
69 # --verbose gives us gobs of info to stdout (e.g. linker script used)
70 test "x$l_list" != "x" && l_list="-Wl,--start-group $l_list -Wl,--end-group -Wl,--verbose"
71 if ! test -f busybox_ldscript; then
73 try "$l_list" "$@" >busybox_ld.out ####|| exit 1
75 echo "Custom linker script 'busybox_ldscript' found, using it"
76 # Add SORT_BY_ALIGNMENT to linker script (found in busybox_ld.out):
77 # .rodata : { *(.rodata SORT_BY_ALIGNMENT(.rodata.*) .gnu.linkonce.r.*) }
78 # *(.data SORT_BY_ALIGNMENT(.data.*) .gnu.linkonce.d.*)
79 # *(.bss SORT_BY_ALIGNMENT(.bss.*) .gnu.linkonce.b.*)
80 # This will eliminate most of the data padding (~3kb).
81 try "$l_list -Wl,-T -Wl,busybox_ldscript" "$@" >busybox_ld.out
85 ####exit 0 # Ensure "success" exit code