我正在尝试安装 gcc,但一直收到此消息:
~$ sudo apt install gcc make gdb valgrind git
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
The following packages have unmet dependencies.
gcc : Depends: gcc-9 (>= 9.3.0-3~) but it is not going to be installed
Recommends: libc6-dev but it is not going to be installed or
libc-dev
valgrind : Depends: libc6-dbg but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
我应该怎么办?