ls /usr/bin/gcc* -l lrwxrwxrwx 1 root root 21 6月 2 09:38 /usr/bin/gcc -> /etc/alternatives/gcc lrwxrwxrwx 1 root root 23 5月 29 15:49 /usr/bin/gcc-10 -> x86_64-linux-gnu-gcc-10 lrwxrwxrwx 1 root root 22 4月 2 2020 /usr/bin/gcc-8 -> x86_64-linux-gnu-gcc-8 lrwxrwxrwx 1 root root 22 8月 8 2020 /usr/bin/gcc-9 -> x86_64-linux-gnu-gcc-9 lrwxrwxrwx 1 root root 8 3月 20 2020 /usr/bin/gcc-ar -> gcc-ar-9 lrwxrwxrwx 1 root root 26 5月 29 15:49 /usr/bin/gcc-ar-10 -> x86_64-linux-gnu-gcc-ar-10 lrwxrwxrwx 1 root root 25 4月 2 2020 /usr/bin/gcc-ar-8 -> x86_64-linux-gnu-gcc-ar-8 lrwxrwxrwx 1 root root 25 8月 8 2020 /usr/bin/gcc-ar-9 -> x86_64-linux-gnu-gcc-ar-9 lrwxrwxrwx 1 root root 8 3月 20 2020 /usr/bin/gcc-nm -> gcc-nm-9 lrwxrwxrwx 1 root root 26 5月 29 15:49 /usr/bin/gcc-nm-10 -> x86_64-linux-gnu-gcc-nm-10 lrwxrwxrwx 1 root root 25 4月 2 2020 /usr/bin/gcc-nm-8 -> x86_64-linux-gnu-gcc-nm-8 lrwxrwxrwx 1 root root 25 8月 8 2020 /usr/bin/gcc-nm-9 -> x86_64-linux-gnu-gcc-nm-9 lrwxrwxrwx 1 root root 12 3月 20 2020 /usr/bin/gcc-ranlib -> gcc-ranlib-9 lrwxrwxrwx 1 root root 30 5月 29 15:49 /usr/bin/gcc-ranlib-10 -> x86_64-linux-gnu-gcc-ranlib-10 lrwxrwxrwx 1 root root 29 4月 2 2020 /usr/bin/gcc-ranlib-8 -> x86_64-linux-gnu-gcc-ranlib-8 lrwxrwxrwx 1 root root 29 8月 8 2020 /usr/bin/gcc-ranlib-9 -> x86_64-linux-gnu-gcc-ranlib-9 sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 50 sudo update-alternatives --config gcc There are 2 choices for the alternative gcc (providing /usr/bin/gcc). Selection Path Priority Status ------------------------------------------------------------ * 0 /usr/bin/gcc-10 100 auto mode 1 /usr/bin/gcc-10 100 manual mode 2 /usr/bin/gcc-9 50 manual mode Pressto keep the current choice[*], or type selection number: 2 update-alternatives: using /usr/bin/gcc-9 to provide /usr/bin/gcc (gcc) in manual mode
