Hi Johannes, I did
I have download everything from scratch and I still get that error when compiling ibrd
Making install in src
make[1]: Entering directory `/home/t/ibrdtnOpenWRT_rPi/ibrdtn/ibrdtn-tools-0.10.2/src'
CXX dtnping.o
CXXLD dtnping
/home/t/openwrt/attitude_adjustment_rPi/staging_dir/toolchain-arm_v6_gcc-4.6-linaro_uClibc-0.9.33.2_eabi/lib/gcc/arm-openwrt-linux-uclibcgnueabi/4.6.3/../../../../arm-openwrt-linux-uclibcgnueabi/bin/ld: /home/t/openwrt/attitude_adjustment_rPi/staging_dir/toolchain-arm_v6_gcc-4.6-linaro_uClibc-0.9.33.2_eabi/lib/gcc/arm-openwrt-linux-uclibcgnueabi/4.6.3/../../../../arm-openwrt-linux-uclibcgnueabi/lib/librt.so: undefined reference to symbol 'pthread_cancel'
/home/t/openwrt/attitude_adjustment_rPi/staging_dir/toolchain-arm_v6_gcc-4.6-linaro_uClibc-0.9.33.2_eabi/lib/gcc/arm-openwrt-linux-uclibcgnueabi/4.6.3/../../../../arm-openwrt-linux-uclibcgnueabi/bin/ld: note: 'pthread_cancel' is defined in DSO /home/t/openwrt/attitude_adjustment_rPi/staging_dir/toolchain-arm_v6_gcc-4.6-linaro_uClibc-0.9.33.2_eabi/arm-openwrt-linux-uclibcgnueabi/bin/../../../toolchain-arm_v6_gcc-4.6-linaro_uClibc-0.9.33.2_eabi/lib/libpthread.so.0 so try adding it to the linker command line
/home/t/openwrt/attitude_adjustment_rPi/staging_dir/toolchain-arm_v6_gcc-4.6-linaro_uClibc-0.9.33.2_eabi/arm-openwrt-linux-uclibcgnueabi/bin/../../../toolchain-arm_v6_gcc-4.6-linaro_uClibc-0.9.33.2_eabi/lib/libpthread.so.0: could not read symbols: Invalid operation
collect2: ld returned 1 exit status
make[1]: *** [dtnping] Error 1
make[1]: Leaving directory `/home/t/ibrdtnOpenWRT_rPi/ibrdtn/ibrdtn-tools-0.10.2/src'
make: *** [install-recursive] Error 1
error while compiling ibrdtn-tools