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Define GNU-specific link options in one place

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This makes them easier to change to support a non-GNU toolchain.

Signed-off-by: Dan Fandrich <dan@coneharvesters.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Dan Fandrich 2010-06-18 22:36:10 -07:00 committed by Denys Vlasenko
parent 0635ddd8f7
commit ebeac1685a
1 changed files with 18 additions and 21 deletions
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39
scripts/trylink
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@ -85,6 +85,11 @@ LDLIBS="$7"
# The --sort-section option is not supported by older versions of ld
SORT_SECTION=`check_cc "-Wl,--sort-section,alignment" ""`
START_GROUP="-Wl,--start-group"
END_GROUP="-Wl,--end-group"
INFO_OPTS="-Wl,--warn-common -Wl,-Map,$EXE.map -Wl,--verbose"
# gold may not support --sort-common (yet)
SORT_COMMON=`check_cc "-Wl,--sort-common" ""`
@ -114,13 +119,13 @@ LDLIBS=`echo "$LDLIBS" | xargs -n1 | sort | uniq | xargs`
echo "Trying libraries: $LDLIBS"
# "lib1 lib2 lib3" -> "-llib1 -llib2 -llib3"
l_list=`echo "$LDLIBS" | sed -e 's/ / -l/g' -e 's/^/-l/' -e 's/^-l$//'`
test "x$l_list" != "x" && l_list="-Wl,--start-group $l_list -Wl,--end-group"
test "x$l_list" != "x" && l_list="$START_GROUP $l_list $END_GROUP"
try $CC $CFLAGS $LDFLAGS \
-o $EXE \
$SORT_COMMON \
$SORT_SECTION \
$GC_SECTIONS \
-Wl,--start-group $O_FILES $A_FILES -Wl,--end-group \
$START_GROUP $O_FILES $A_FILES $END_GROUP \
$l_list \
|| {
echo "Failed: $l_list"
@ -138,14 +143,14 @@ while test "$LDLIBS"; do
without_one=`echo " $LDLIBS " | 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 $l_list -Wl,--end-group"
test x"$l_list" != x"" && l_list="$START_GROUP $l_list $END_GROUP"
$debug && echo "Trying -l options: '$l_list'"
try $CC $CFLAGS $LDFLAGS \
-o $EXE \
$SORT_COMMON \
$SORT_SECTION \
$GC_SECTIONS \
-Wl,--start-group $O_FILES $A_FILES -Wl,--end-group \
$START_GROUP $O_FILES $A_FILES $END_GROUP \
$l_list
if test $? = 0; then
echo " Library $one is not needed, excluding it"
@ -169,7 +174,7 @@ done
# Make the binary with final, minimal list of libs
echo "Final link with: ${LDLIBS:-<none>}"
l_list=`echo "$LDLIBS" | sed -e 's/ / -l/g' -e 's/^/-l/' -e 's/^-l$//'`
test "x$l_list" != "x" && l_list="-Wl,--start-group $l_list -Wl,--end-group"
test "x$l_list" != "x" && l_list="$START_GROUP $l_list $END_GROUP"
# --verbose gives us gobs of info to stdout (e.g. linker script used)
if ! test -f busybox_ldscript; then
try $CC $CFLAGS $LDFLAGS \
@ -177,11 +182,9 @@ if ! test -f busybox_ldscript; then
$SORT_COMMON \
$SORT_SECTION \
$GC_SECTIONS \
-Wl,--start-group $O_FILES $A_FILES -Wl,--end-group \
$START_GROUP $O_FILES $A_FILES $END_GROUP \
$l_list \
-Wl,--warn-common \
-Wl,-Map,$EXE.map \
-Wl,--verbose \
$INFO_OPTS \
|| {
cat $EXE.out
exit 1
@ -200,11 +203,9 @@ else
$SORT_SECTION \
$GC_SECTIONS \
-Wl,-T,busybox_ldscript \
-Wl,--start-group $O_FILES $A_FILES -Wl,--end-group \
$START_GROUP $O_FILES $A_FILES $END_GROUP \
$l_list \
-Wl,--warn-common \
-Wl,-Map,$EXE.map \
-Wl,--verbose \
$INFO_OPTS \
|| {
cat $EXE.out
exit 1
@ -233,11 +234,9 @@ if test "$CONFIG_BUILD_LIBBUSYBOX" = y; then
-Wl,--undefined=lbb_main \
$SORT_COMMON \
$SORT_SECTION \
-Wl,--start-group $A_FILES -Wl,--end-group \
$START_GROUP $A_FILES $END_GROUP \
$l_list \
-Wl,--warn-common \
-Wl,-Map,$EXE.map \
-Wl,--verbose \
$INFO_OPTS \
|| {
echo "Linking $EXE failed"
cat $EXE.out
@ -255,11 +254,9 @@ if test "$CONFIG_FEATURE_SHARED_BUSYBOX" = y; then
$SORT_COMMON \
$SORT_SECTION \
$GC_SECTIONS \
-Wl,--start-group $O_FILES -Wl,--end-group \
$START_GROUP $O_FILES $END_GROUP \
-L"$sharedlib_dir" -lbusybox \
-Wl,--warn-common \
-Wl,-Map,$EXE.map \
-Wl,--verbose \
$INFO_OPTS \
|| {
echo "Linking $EXE failed"
cat $EXE.out