diff options
Diffstat (limited to 'scripts/trylink')
| -rwxr-xr-x | scripts/trylink | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/scripts/trylink b/scripts/trylink index 6b74f09..2255dee 100755 --- a/scripts/trylink +++ b/scripts/trylink @@ -1,5 +1,6 @@ #!/bin/sh +#debug=true debug=false # Linker flags used: @@ -77,7 +78,13 @@ CFLAGS="$3" LDFLAGS="$4" O_FILES="$5" A_FILES="$6" +# We try to drop libraries from LDLIBS if build works without them, +# but ones from CONFIG_EXTRA_LDLIBS are always linked in. +# (For example, musl has stub utmp implementation, and if you link with +# a real utmp library in LDLIBS, dropping it "works" but resulting binary +# does not work properly). LDLIBS="$7" +CONFIG_EXTRA_LDLIBS="$8" # The --sort-section option is not supported by older versions of ld SORT_SECTION="-Wl,--sort-section,alignment" @@ -125,8 +132,8 @@ LDLIBS=`echo "$LDLIBS" | xargs -n1 | sort | uniq | xargs` # First link with all libs. If it fails, bail out echo "Trying libraries: $LDLIBS" # "lib1 lib2 lib3" -> "-llib1 -llib2 -llib3" -l_list=`echo " $LDLIBS " | sed -e 's: \([^- ][^ ]*\): -l\1:g'` -test "x$l_list" != "x" && l_list="$START_GROUP $l_list $END_GROUP" +l_list=`echo " $LDLIBS $CONFIG_EXTRA_LDLIBS " | sed -e 's: \([^- ][^ ]*\): -l\1:g' -e 's/^ *//'` +test x"$l_list" != x"" && l_list="$START_GROUP $l_list $END_GROUP" try $CC $CFLAGS $LDFLAGS \ -o $EXE \ $SORT_COMMON \ @@ -151,7 +158,7 @@ while test "$LDLIBS"; do for one in $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\1:g'` + l_list=`echo " $without_one $CONFIG_EXTRA_LDLIBS " | sed -e 's: \([^- ][^ ]*\): -l\1:g' -e 's/^ *//'` test x"$l_list" != x"" && l_list="$START_GROUP $l_list $END_GROUP" $debug && echo "Trying -l options: '$l_list'" try $CC $CFLAGS $LDFLAGS \ @@ -179,8 +186,8 @@ done # Make the binary with final, minimal list of libs echo "Final link with: ${LDLIBS:-<none>}" -l_list=`echo " $LDLIBS " | sed -e 's: \([^- ][^ ]*\): -l\1:g'` -test "x$l_list" != "x" && l_list="$START_GROUP $l_list $END_GROUP" +l_list=`echo " $LDLIBS $CONFIG_EXTRA_LDLIBS " | sed -e 's: \([^- ][^ ]*\): -l\1:g' -e 's/^ *//'` +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 \ |