diff options
Diffstat (limited to 'scripts/trylink')
| -rwxr-xr-x | scripts/trylink | 97 |
1 files changed, 81 insertions, 16 deletions
diff --git a/scripts/trylink b/scripts/trylink index 0b8f6c0..19b0ba7 100755 --- a/scripts/trylink +++ b/scripts/trylink @@ -3,24 +3,40 @@ debug=false try() { - added="$1" - shift - $debug && echo "Trying: $* $added" - "$@" $added 2>busybox_ld.err + printf "%s\n" "Output of:" >$EXE.out + printf "%s\n" "$*" >>$EXE.out + printf "%s\n" "==========" >>$EXE.out + $debug && echo "Trying: $*" + "$@" >>$EXE.out 2>&1 + exitcode=$? + cat $EXE.out + return $exitcode } +EXE="$1" +CC="$2" +LDFLAGS="$3" +O_FILES="$4" +A_FILES="$5" +LDLIBS="$6" + # Sanitize lib list (dups, extra spaces etc) -#echo "BBOX_LIB_LIST=$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: $BBOX_LIB_LIST" +# "lib1 lib2 lib3" -> "-llib1 -llib2 -llib3" l_list=`echo "$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" "$@" \ +try $CC $LDFLAGS \ + -o $EXE -Wl,-Map -Wl,$EXE.map \ + -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \ + -Wl,--start-group $O_FILES $A_FILES -Wl,--end-group \ + $l_list \ + >/dev/null \ || { - echo "Failed: $* -Wl,--start-group $l_list -Wl,--end-group" - cat busybox_ld.err + echo "Failed: $* $l_list" + cat $EXE.out exit 1 } @@ -31,15 +47,22 @@ while test "$BBOX_LIB_LIST"; do all_needed=true for one in $BBOX_LIB_LIST; do without_one=`echo " $BBOX_LIB_LIST " | sed "s/ $one / /g" | xargs` + # "lib1 lib2 lib3" -> "-llib1 -llib2 -llib3" l_list=`echo "$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 + try $CC $LDFLAGS \ + -o $EXE -Wl,-Map -Wl,$EXE.map \ + -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \ + -Wl,--start-group $O_FILES $A_FILES -Wl,--end-group \ + $l_list \ + >/dev/null + if test $? = 0; then + echo "Library $one is not needed" + BBOX_LIB_LIST="$without_one" + all_needed=false else - echo "Library $one is needed" + echo "Library $one is needed" fi done # All libs were needed, can't remove any @@ -56,13 +79,55 @@ l_list=`echo "$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 + try $CC $LDFLAGS \ + -o $EXE -Wl,-Map -Wl,$EXE.map \ + -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \ + -Wl,--start-group $O_FILES $A_FILES -Wl,--end-group \ + $l_list -Wl,--verbose \ + >/dev/null else echo "Custom linker script 'busybox_ldscript' found, using it" - # Add SORT_BY_ALIGNMENT to linker script (found in busybox_ld.out): + # Add SORT_BY_ALIGNMENT to linker script (found in ${EXE}_ld.out): # .rodata : { *(.rodata SORT_BY_ALIGNMENT(.rodata.*) .gnu.linkonce.r.*) } # *(.data SORT_BY_ALIGNMENT(.data.*) .gnu.linkonce.d.*) # *(.bss SORT_BY_ALIGNMENT(.bss.*) .gnu.linkonce.b.*) # This will eliminate most of the data padding (~3kb). - try "$l_list -Wl,--verbose -Wl,-T -Wl,busybox_ldscript" "$@" >busybox_ld.out + try $CC $LDFLAGS \ + -o $EXE -Wl,-Map -Wl,$EXE.map \ + -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \ + -Wl,--start-group $O_FILES $A_FILES -Wl,--end-group \ + $l_list -Wl,--verbose \ + -Wl,-T -Wl,busybox_ldscript \ + >/dev/null fi + +mkdir 0lib 2>/dev/null +test -d 0lib || exit 1 +ln -s libbusybox.so.1.8.0 0lib/libbusybox.so 2>/dev/null + +EXE="0lib/libbusybox.so.1.8.0" +try $CC $LDFLAGS \ + -o $EXE -Wl,-Map -Wl,$EXE.map \ + -shared -fPIC -Wl,--enable-new-dtags \ + -Wl,--start-group -Wl,--whole-archive $A_FILES -Wl,--no-whole-archive -Wl,--end-group \ + $l_list -Wl,--verbose \ + -Wl,-soname="libbusybox.so.1.8.0" \ + -Wl,-z,combreloc \ + >/dev/null \ +|| { + echo "Linking $EXE failed" + exit 1 +} + +EXE="0lib/busybox" +try $CC $LDFLAGS \ + -o $EXE -Wl,-Map -Wl,$EXE.map \ + -Wl,--warn-common -Wl,--sort-common -Wl,--gc-sections \ + -Wl,--start-group $O_FILES -Wl,--end-group \ + $l_list -Wl,--verbose \ + -L"0lib" -lbusybox \ + >/dev/null \ +|| { + echo "Linking $EXE failed" + exit 1 +} |