Add package libwebsockets

Hallo everybody,

I'm trying to add the package libwebsockets.
When running make V=s I get the following output.

make[5]: Entering directory '/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/build_dir/target-mips_34kc_uClibc-0.9.33.2/libcap-2.26'
make -C libcap all
make[6]: Entering directory '/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/build_dir/target-mips_34kc_uClibc-0.9.33.2/libcap-2.26/libcap'
make[6]: Nothing to be done for 'all'.
make[6]: Leaving directory '/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/build_dir/target-mips_34kc_uClibc-0.9.33.2/libcap-2.26/libcap'
make -C progs all
make[6]: Entering directory '/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/build_dir/target-mips_34kc_uClibc-0.9.33.2/libcap-2.26/progs'
mips-openwrt-linux-uclibc-gcc -Os -pipe -mno-branch-likely -mips32r2 -mtune=34kc -fno-caller-saves -fhonour-copts -Wno-error=unused-but-set-variable -msoft-float -mips16 -minterlink-mips16 -L/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/staging_dir/target-mips_34kc_uClibc-0.9.33.2/usr/lib -L/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/staging_dir/target-mips_34kc_uClibc-0.9.33.2/lib -L/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/staging_dir/toolchain-mips_34kc_gcc-4.8-linaro_uClibc-0.9.33.2/usr/lib -L/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/staging_dir/toolchain-mips_34kc_gcc-4.8-linaro_uClibc-0.9.33.2/lib -o getpcaps getpcaps.o -L../libcap -lcap
../libcap/libcap.so: undefined reference to `fgetxattr'
../libcap/libcap.so: undefined reference to `removexattr'
../libcap/libcap.so: undefined reference to `fremovexattr'
../libcap/libcap.so: undefined reference to `setxattr'
../libcap/libcap.so: undefined reference to `fsetxattr'
../libcap/libcap.so: undefined reference to `getxattr'
collect2: error: ld returned 1 exit status
Makefile:19: recipe for target 'getpcaps' failed
make[6]: *** [getpcaps] Error 1
make[6]: Leaving directory '/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/build_dir/target-mips_34kc_uClibc-0.9.33.2/libcap-2.26/progs'
Makefile:12: recipe for target 'all' failed
make[5]: *** [all] Error 2
make[5]: Leaving directory '/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/build_dir/target-mips_34kc_uClibc-0.9.33.2/libcap-2.26'
Makefile:88: recipe for target '/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/build_dir/target-mips_34kc_uClibc-0.9.33.2/libcap-2.26/.built' failed
make[4]: *** [/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/build_dir/target-mips_34kc_uClibc-0.9.33.2/libcap-2.26/.built] Error 2
make[4]: Leaving directory '/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/feeds/packages/libs/libcap'
package/Makefile:169: recipe for target 'package/feeds/packages/libcap/compile' failed
make[3]: *** [package/feeds/packages/libcap/compile] Error 2
make[3]: Leaving directory '/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2'
package/Makefile:166: recipe for target '/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/staging_dir/target-mips_34kc_uClibc-0.9.33.2/stamp/.package_compile' failed
make[2]: *** [/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/staging_dir/target-mips_34kc_uClibc-0.9.33.2/stamp/.package_compile] Error 2
make[2]: Leaving directory '/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2'
Makefile:95: recipe for target 'world' failed
make[1]: *** [world] Error 2
make[1]: Leaving directory '/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2'
/home/enio/Dev/RUT9XX_R_GPL_00.06.02.2/include/toplevel.mk:169: recipe for target 'world' failed
make: *** [world] Error 2

Does anybody have similar problems or has a solution to fix this.

Thanks
Manuel