make[3]: Entering directory '/home/juan/devel/OpenWrt/openwrt-trunk/package/utils/busybox'
make   -C /home/juan/devel/OpenWrt/openwrt-trunk/build_dir/target-mips_34kc_musl-1.1.10/busybox-1.23.2 CC="mips-openwrt-linux-musl-gcc" CROSS_COMPILE="mips-openwrt-linux-musl-" KBUILD_HAVE_NLS=no EXTRA_CFLAGS="-Os -pipe -mno-branch-likely -mips32r2 -mtune=34kc -fno-caller-saves -fhonour-copts -Wno-error=unused-but-set-variable -msoft-float -mips16 -minterlink-mips16" ARCH="mips" SKIP_STRIP=y LDLIBS="m crypt"  all
make[4]: Entering directory '/home/juan/devel/OpenWrt/openwrt-trunk/build_dir/target-mips_34kc_musl-1.1.10/busybox-1.23.2'
  LINK    busybox_unstripped
Trying libraries: crypt m
Failed: -Wl,--start-group  -lcrypt -lm  -Wl,--end-group
Output of:
mips-openwrt-linux-musl-gcc -Wall -Wshadow -Wwrite-strings -Wundef -Wstrict-prototypes -Wunused -Wunused-parameter -Wunused-function -Wunused-value -Wmissing-prototypes -Wmissing-declarations -Wno-format-security -Wdeclaration-after-statement -Wold-style-definition -fno-builtin-strlen -finline-limit=0 -fomit-frame-pointer -ffunction-sections -fdata-sections -fno-guess-branch-probability -funsigned-char -falign-functions=1 -falign-jumps=1 -falign-labels=1 -falign-loops=1 -fno-unwind-tables -fno-asynchronous-unwind-tables -Os -o busybox_unstripped -Wl,--sort-common -Wl,--sort-section,alignment -Wl,--gc-sections -Wl,--start-group applets/built-in.o archival/lib.a archival/libarchive/lib.a console-tools/lib.a coreutils/lib.a coreutils/libcoreutils/lib.a debianutils/lib.a e2fsprogs/lib.a editors/lib.a findutils/lib.a init/lib.a libbb/lib.a libpwdgrp/lib.a loginutils/lib.a mailutils/lib.a miscutils/lib.a modutils/lib.a networking/lib.a networking/libiproute/lib.a networking/udhcp/lib.a printutils/lib.a procps/lib.a runit/lib.a selinux/lib.a shell/lib.a sysklogd/lib.a util-linux/lib.a util-linux/volume_id/lib.a archival/built-in.o archival/libarchive/built-in.o console-tools/built-in.o coreutils/built-in.o coreutils/libcoreutils/built-in.o debianutils/built-in.o e2fsprogs/built-in.o editors/built-in.o findutils/built-in.o init/built-in.o libbb/built-in.o libpwdgrp/built-in.o loginutils/built-in.o mailutils/built-in.o miscutils/built-in.o modutils/built-in.o networking/built-in.o networking/libiproute/built-in.o networking/udhcp/built-in.o printutils/built-in.o procps/built-in.o runit/built-in.o selinux/built-in.o shell/built-in.o sysklogd/built-in.o util-linux/built-in.o util-linux/volume_id/built-in.o -Wl,--end-group -Wl,--start-group -lcrypt -lm -Wl,--end-group
==========
loginutils/lib.a(deluser.o): In function `deluser_main':
deluser.c:(.text.deluser_main+0xaa): undefined reference to `getpwent_r'
collect2: error: ld returned 1 exit status
Makefile:716: recipe for target 'busybox_unstripped' failed
make[4]: *** [busybox_unstripped] Error 1
make[4]: Leaving directory '/home/juan/devel/OpenWrt/openwrt-trunk/build_dir/target-mips_34kc_musl-1.1.10/busybox-1.23.2'
Makefile:119: recipe for target '/home/juan/devel/OpenWrt/openwrt-trunk/build_dir/target-mips_34kc_musl-1.1.10/busybox-1.23.2/.built' failed
make[3]: *** [/home/juan/devel/OpenWrt/openwrt-trunk/build_dir/target-mips_34kc_musl-1.1.10/busybox-1.23.2/.built] Error 2
make[3]: Leaving directory '/home/juan/devel/OpenWrt/openwrt-trunk/package/utils/busybox'
package/Makefile:191: recipe for target 'package/utils/busybox/compile' failed
make[2]: *** [package/utils/busybox/compile] Error 2
make[2]: Leaving directory '/home/juan/devel/OpenWrt/openwrt-trunk'
package/Makefile:188: recipe for target '/home/juan/devel/OpenWrt/openwrt-trunk/staging_dir/target-mips_34kc_musl-1.1.10/stamp/.package_compile' failed
make[1]: *** [/home/juan/devel/OpenWrt/openwrt-trunk/staging_dir/target-mips_34kc_musl-1.1.10/stamp/.package_compile] Error 2
make[1]: Leaving directory '/home/juan/devel/OpenWrt/openwrt-trunk'
/home/juan/devel/OpenWrt/openwrt-trunk/include/toplevel.mk:181: recipe for target 'world' failed
make: *** [world] Error 2