https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64012
--- Comment #4 from Airbak <airbak.li at huawei dot com> --- When I build toolchain with GNU <gcc-4.9.2.tar.bz2>, the problem also exist. ------------------ lijianhui@key:~/hi3535/Hi3535_SDK_V2.0.3.1/osdrv/kernel/linux-3.4.y$ arm-unknown-linux-gnueabi-gcc -v Using built-in specs. COLLECT_GCC=arm-unknown-linux-gnueabi-gcc COLLECT_LTO_WRAPPER=/home/os/lijianhui/linaro/new-crosstool-ng/install-org-gcc/bin/../libexec/gcc/arm-unknown-linux-gnueabi/4.9.2/lto-wrapper Target: arm-unknown-linux-gnueabi Configured with: /home/os/lijianhui/linaro/new-crosstool-ng/.build/src/gcc-4.9.2/configure --build=x86_64-build_unknown-linux-gnu --host=x86_64-build_unknown-linux-gnu --target=arm-unknown-linux-gnueabi --prefix=/home/os/lijianhui/linaro/new-crosstool-ng/install ... Any suggestions?