cannot find -lc and -lm in g++ linux

Question

I am using ubuntu and gcc and g++ were working fine but today it showed:

cannot find -lm
cannot find -lc

I searched and found it has something

Answer 1

ld is the GNU linker.

man ld ld combines a number of object and archive files, relocates their data and ties up symbol references. Usually the last step in compiling a program is to run ld.

It is uses to link your program with the C library and the C math library. You need to make sure that libc6-dev is installed:

foo@bar: $ dpkg -s libc6-dev

Or more generic, ensure build-essential, which depends on a handful of essential C packages.

foo@bar: $ dpkg -s build-essential