由于程序兼容性问题，我需要将 GCC 降级到至少 4.9
我该怎么做呢？谢谢。
编辑：该程序是 Blender 并且正在尝试进行 GPU 渲染。控制台踢出的具体错误是
CUDA version 7.5 detected, build may succeed but only CUDA 6.5 is officially supported.
Compiling CUDA kernel ...
"/usr/local/cuda/bin/nvcc" -arch=sm_52 -m64 --cubin "/usr/share/blender/2.76/scripts/addons/cycles/kernel/kernels/cuda/kernel.cu" -o "/home/matthew/.config/blender/2.76/cache/cycles_kernel_sm52_3A157B804910758CA7C526B5EF063D78.cubin" --ptxas-options="-v" --use_fast_math -I"/usr/share/blender/2.76/scripts/addons/cycles/kernel" -DNVCC -D__KERNEL_CUDA_VERSION__=75
In file included from /usr/local/cuda/bin/../targets/x86_64-linux/include/cuda_runtime.h:76:0,
from <command-line>:0:
/usr/local/cuda/bin/../targets/x86_64-linux/include/host_config.h:115:2: error: #error -- unsupported GNU version! gcc versions later than 4.9 are not supported!
#error -- unsupported GNU version! gcc versions later than 4.9 are not supporte
^
CUDA kernel compilation failed, …