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/'`
18 echo "Trying libraries: $BBOX_LIB_LIST"
19 try "-Wl,--start-group $l_list -Wl,--end-group" "$@" \
21 echo "Failed: $* -Wl,--start-group $l_list -Wl,--end-group"
26 #### Hack disabled: conflicts with ld --verbose flag in last link phase
28 ##### Hack: we are not supposed to know executable name,
29 ##### but this hack cuts down link time
30 ####mv busybox_unstripped busybox_unstripped.tmp
31 ####mv busybox.map busybox.map.tmp
33 # Now try to remove each lib and build without it.
34 # Stop when no lib can be removed.
35 ####ever_discarded=false
36 while test "$BBOX_LIB_LIST"; do
37 $debug && echo "Trying libraries: $BBOX_LIB_LIST"
39 for one in $BBOX_LIB_LIST; do
40 without_one=`echo " $BBOX_LIB_LIST " | sed "s/ $one / /g" | xargs`
41 l_list=`echo "$without_one" | sed -e 's/ / -l/g' -e 's/^/-l/'`
42 $debug && echo "Trying -l options: $l_list"
43 if try "-Wl,--start-group $l_list -Wl,--end-group" "$@"; then
44 echo "Library $one is not needed"
45 BBOX_LIB_LIST="$without_one"
47 #### ever_discarded=true
49 echo "Library $one is needed"
52 # All libs were needed, can't remove any
54 # If there is no space char, the list has just one lib.
55 # I'm not sure that in this case lib really is 100% needed.
56 # Let's try linking without it anyway... thus commented out.
57 #{ echo "$BBOX_LIB_LIST" | grep -q ' '; } || break
60 ####mv busybox_unstripped.tmp busybox_unstripped
61 ####mv busybox.map.tmp busybox.map
62 ####$ever_discarded && {
63 # Make the binary with final, minimal list of libs
64 echo "Final link with: $BBOX_LIB_LIST"
65 l_list=`echo "$BBOX_LIB_LIST" | sed -e 's/ / -l/g' -e 's/^/-l/'`
66 # --verbose gives us gobs of info to stdout (e.g. linker script used)
67 if ! test -f busybox_ldscript; then
68 try "-Wl,--start-group $l_list -Wl,--end-group -Wl,--verbose" "$@" >busybox_ld.out ####|| exit 1
70 echo "Custom linker script 'busybox_ldscript' found, using it"
71 # Add SORT_BY_ALIGNMENT to linker script (found in busybox_ld.out):
72 # .rodata : { *(.rodata SORT_BY_ALIGNMENT(.rodata.*) .gnu.linkonce.r.*) }
73 # *(.data SORT_BY_ALIGNMENT(.data.*) .gnu.linkonce.d.*)
74 # *(.bss SORT_BY_ALIGNMENT(.bss.*) .gnu.linkonce.b.*)
75 # This will eliminate most of the data padding (~3kb).
76 try "-Wl,--start-group $l_list -Wl,--end-group -Wl,--verbose -Wl,-T -Wl,busybox_ldscript" "$@" >busybox_ld.out
80 ####exit 0 # Ensure "success" exit code