SDK compiling failed

The SDK does not work since 12.01.2017

It was working fine on 10.01.2017 and 06.01.2017

checking host system type... mips-openwrt-linux-gnu
checking target system type... mips-openwrt-linux-gnu
Configuring for linux-gnu
checking for prefix... /usr
checking for mips-openwrt-linux-gcc... ccache_cc
checking for C compiler default output... configure: error: C compiler cannot create executables
make[2]: *** [/tmp/build/ledesdk/build_dir/target-mips_24kc_musl-1.1.15/ncurses-6.0/.configured_yynyyyyyyy] Error 77
make[2]: Leaving directory `/tmp/build/ledesdk/feeds/base/package/libs/ncurses'
make[1]: *** [package/feeds/base/ncurses/compile] Error 2
make[1]: Leaving directory `/tmp/build/ledesdk'
make: *** [package/asterisk-11.x/compile] Error 2

in der config log steht

configure:21720: checking if linker supports switching between static/dynamic
configure:21729: ccache gcc -c -O2 -I/tmp/build/ledesdk/staging_dir/host/include -I/tmp/build/ledesdk/staging_dir/host/usr/include -I/tmp/build/ledesdk/staging_dir/target-mips_24kc_musl-1.1.15/host/include  --param max-inline-insns-single=1200 -I. -I../include -I/tmp/build/ledesdk/staging_dir/host/include -I/tmp/build/ledesdk/staging_dir/host/usr/include -I/tmp/build/ledesdk/staging_dir/target-mips_24kc_musl-1.1.15/host/include -D_GNU_SOURCE -DNDEBUG conftest.c >&5
configure:21732: $? = 0
configure:21761: ccache gcc -o conftest -O2 -I/tmp/build/ledesdk/staging_dir/host/include -I/tmp/build/ledesdk/staging_dir/host/usr/include -I/tmp/build/ledesdk/staging_dir/target-mips_24kc_musl-1.1.15/host/include  --param max-inline-insns-single=1200 -I. -I../include -I/tmp/build/ledesdk/staging_dir/host/include -I/tmp/build/ledesdk/staging_dir/host/usr/include -I/tmp/build/ledesdk/staging_dir/target-mips_24kc_musl-1.1.15/host/include -D_GNU_SOURCE -DNDEBUG -L/tmp/build/ledesdk/staging_dir/host/lib -L/tmp/build/ledesdk/staging_dir/host/usr/lib -L/tmp/build/ledesdk/staging_dir/target-mips_24kc_musl-1.1.15/host/lib conftest.c -static -L/tmp/build/ledesdk/build_dir/target-mips_24kc_musl-1.1.15/host/ncurses-6.0 -lconftest  -ldl >&5
/usr/lib64/gcc/x86_64-slackware-linux/4.8.2/../../../../x86_64-slackware-linux/bin/ld: cannot find -lgcc_eh
collect2: error: ld returned 1 exit status
configure:21764: $? = 1
configure: failed program was:
#line 21743 "configure"
#include "confdefs.h"

The config.log part you provided does not match the output of configure in your post. Please upload the full config.log somewhere so I can take a look.

http://pastebin.com/9nbykFJd

I thing there is a general error with the Crosscompiling.
Two days before compiling via SDK works very well.

when i try to compile my own package: ndisc6
I get this Error in config.log

configure:2209: checking system...
configure:2250: checking for build hostname
configure:2258: result: porteus.example.net
configure:2269: checking required programs...
configure:2282: checking for mips-openwrt-linux-gcc
configure:2309: result: ccache_cc
configure:2578: checking for C compiler version
configure:2587: ccache_cc --version >&5
mips-openwrt-linux-musl-gcc (LEDE GCC 5.4.0 r2790-08d73bf) 5.4.0
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

configure:2598: $? = 0
configure:2587: ccache_cc -v >&5
Reading specs from /tmp/build/ledesdk/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15/bin/../lib/gcc/mips-openwrt-linux-musl/5.4.0/specs
COLLECT_GCC=/tmp/build/ledesdk/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15/bin/mips-openwrt-linux-musl-gcc
COLLECT_LTO_WRAPPER=/tmp/build/ledesdk/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15/bin/../libexec/gcc/mips-openwrt-linux-musl/5.4.0/lto-wrapper
Target: mips-openwrt-linux-musl
Configured with: /opt/buildbot/slaves/lede-targets-tah/lantiq_xrx200/build/build_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15/gcc-5.4.0/configure --with-bugurl=http://www.lede-project.org/bugs/ --with-pkgversion='LEDE GCC 5.4.0 r2790-08d73bf' --prefix=/opt/buildbot/slaves/lede-targets-tah/lantiq_xrx200/build/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15 --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=mips-openwrt-linux-musl --with-gnu-ld --enable-target-optspace --disable-libgomp --disable-libmudflap --disable-multilib --disable-libmpx --disable-nls --without-isl --without-cloog --with-host-libstdcxx=-lstdc++ --with-float=soft --with-gmp=/opt/buildbot/slaves/lede-targets-tah/lantiq_xrx200/build/staging_dir/host --with-mpfr=/opt/buildbot/slaves/lede-targets-tah/lantiq_xrx200/build/staging_dir/host --with-mpc=/opt/buildbot/slaves/lede-targets-tah/lantiq_xrx200/build/staging_dir/host --disable-decimal-float --with-mips-plt --with-diagnostics-color=auto-if-env --disable-libssp --enable-__cxa_atexit --with-headers=/opt/buildbot/slaves/lede-targets-tah/lantiq_xrx200/build/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15/include --disable-libsanitizer --enable-languages=c,c++ --enable-shared --enable-threads --with-slibdir=/opt/buildbot/slaves/lede-targets-tah/lantiq_xrx200/build/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15/lib --enable-lto --with-libelf=/opt/buildbot/slaves/lede-targets-tah/lantiq_xrx200/build/staging_dir/host
Thread model: posix
gcc version 5.4.0 (LEDE GCC 5.4.0 r2790-08d73bf) 
configure:2598: $? = 0
configure:2587: ccache_cc -V >&5
mips-openwrt-linux-musl-gcc: error: unrecognized command line option '-V'
mips-openwrt-linux-musl-gcc: fatal error: no input files
compilation terminated.
configure:2598: $? = 1
configure:2587: ccache_cc -qversion >&5
mips-openwrt-linux-musl-gcc: error: unrecognized command line option '-qversion'
mips-openwrt-linux-musl-gcc: fatal error: no input files
compilation terminated.
configure:2598: $? = 1
configure:2618: checking whether the C compiler works
configure:2640: ccache_cc -Os -pipe -mno-branch-likely -mips32r2 -mtune=24kc -fno-caller-saves -fno-plt -fhonour-copts -Wno-error=unused-but-set-variable -Wno-error=unused-result -msoft-float -mips16 -minterlink-mips16 -iremap /tmp/build/ledesdk/build_dir/target-mips_24kc_musl-1.1.15/ndisc6-1.0.3:ndisc6-1.0.3 -Wformat -Werror=format-security -fstack-protector -D_FORTIFY_SOURCE=1 -Wl,-z,now -Wl,-z,relro  -I/tmp/build/ledesdk/staging_dir/target-mips_24kc_musl-1.1.15/usr/include -I/tmp/build/ledesdk/staging_dir/target-mips_24kc_musl-1.1.15/include -I/tmp/build/ledesdk/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15/usr/include -I/tmp/build/ledesdk/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15/include/fortify -I/tmp/build/ledesdk/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15/include  -L/tmp/build/ledesdk/staging_dir/target-mips_24kc_musl-1.1.15/usr/lib -L/tmp/build/ledesdk/staging_dir/target-mips_24kc_musl-1.1.15/lib -L/tmp/build/ledesdk/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15/usr/lib -L/tmp/build/ledesdk/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15/lib -znow -zrelro  conftest.c  >&5
/tmp/build/ledesdk/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15/bin/../libexec/gcc/mips-openwrt-linux-musl/5.4.0/cc1: /usr/lib64/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by /tmp/build/ledesdk/staging_dir/toolchain-mips_24kc_gcc-5.4.0_musl-1.1.15/bin/../libexec/gcc/mips-openwrt-linux-musl/5.4.0/cc1)
configure:2644: $? = 1
configure:2682: result: no

and the other Errors are similar.
The SDK try to link against libs from my System.

Please try the most current SDK, it has a number of fixes for this specific problem.

Now I am compiling and it takes a while, but i am over the point with my error.
Thanks for Help !