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