Here, I attached my libstdc++.so.6.0.21, which is linked to libstdc++.so, and its a copy from my linaro compiler, which was download from linaro official website, named: gcc-linaro-5.3-2016.02-x86_64_arm-linux-gnueabihf.tar.xz the so file is to large and failed to upload. At 2020-03-10 22:24:22, "Florian Weimer" <fw@xxxxxxxxxxxxx> wrote: >* kipade: > >>>> "/opt/arm-toolchain/linux/linaro/gcc-linaro-5.3-2016.02-x86_64_arm-linux-gnueabihf/bin/../lib/gcc/arm-linux-gnueabihf/5.3.1/../../../. >>>> ./arm-linux-gnueabihf/lib/libstdc++.so: undefined reference to `clock_gettime@GLIBC_2.17' > >> thanks for your reply. my link cmd is: >> arm-linux-gnueabihf-g++ main.o -L ../arm_common/build/lib/ -larmcomm -pthread -lelf -ldl -lrt > >This doesn't look particularly suspicious. > >You need to double-check that your cross-compiler version matches the >glibc version you have installed for its use. The error message >suggests that you are using an outdated glibc version that predates >the one that was used to build GCC and libstdc++. (It's also possible >that you are not trying to link against glibc at all, but in that >case, more undefined symbols would show up, I think.) > >(I assume this is a cross-compilation environment, so there's no risk >that there are Arm libraries on the host.)
