diff options
Diffstat (limited to 'scripts/trylink')
| -rwxr-xr-x | scripts/trylink | 41 |
1 files changed, 27 insertions, 14 deletions
diff --git a/scripts/trylink b/scripts/trylink index 74acb4cdd..9b67deb49 100755 --- a/scripts/trylink +++ b/scripts/trylink @@ -6,7 +6,7 @@ try() { added="$1" shift $debug && echo "Trying: $* $added" - "$@" $added >busybox.map 2>busybox_ld.err + "$@" $added 2>busybox_ld.err } # Sanitize lib list (dups, extra spaces etc) @@ -22,14 +22,17 @@ try "-Wl,--start-group $l_list -Wl,--end-group" "$@" \ cat busybox_ld.err exit 1 } -# Hack: we are not supposed to know executable name, -# but this hack cuts down link time -mv busybox_unstripped busybox_unstripped.tmp -mv busybox.map busybox.map.tmp + +#### Hack disabled: conflicts with ld --verbose flag in last link phase + +##### Hack: we are not supposed to know executable name, +##### but this hack cuts down link time +####mv busybox_unstripped busybox_unstripped.tmp +####mv busybox.map busybox.map.tmp # Now try to remove each lib and build without it. # Stop when no lib can be removed. -ever_discarded=false +####ever_discarded=false while test "$BBOX_LIB_LIST"; do $debug && echo "Trying libraries: $BBOX_LIB_LIST" all_needed=true @@ -41,7 +44,7 @@ while test "$BBOX_LIB_LIST"; do echo "Library $one is not needed" BBOX_LIB_LIST="$without_one" all_needed=false - ever_discarded=true +#### ever_discarded=true else echo "Library $one is needed" fi @@ -54,13 +57,23 @@ while test "$BBOX_LIB_LIST"; do #{ echo "$BBOX_LIB_LIST" | grep -q ' '; } || break done -mv busybox_unstripped.tmp busybox_unstripped -mv busybox.map.tmp busybox.map -$ever_discarded && { +####mv busybox_unstripped.tmp busybox_unstripped +####mv busybox.map.tmp busybox.map +####$ever_discarded && { # 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/'` - try "-Wl,--start-group $l_list -Wl,--end-group" "$@" || exit 1 -} -rm busybox_ld.err -exit 0 # Ensure "success" exit code + # --verbose gives us gobs of info to stdout (e.g. linker script used) + try "-Wl,--start-group $l_list -Wl,--end-group -Wl,--verbose" "$@" >busybox_ld.out ####|| exit 1 + # + # 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. Use linker script + # by commenting "try" above and uncommenting this one (tested on i386): + #try "-Wl,--start-group $l_list -Wl,--end-group -Wl,--verbose -Wl,-T -Wl,busybox_ldscript" "$@" >busybox_ld.out + # +####} +####rm busybox_ld.err +####exit 0 # Ensure "success" exit code |