Hello Linux! \ N

2012.10.24

According to the introduction to Gcc on ubuntu wiki, We are initially familiar with Gcc usage. Compilation of a single file, capture errors, and compilation of multiple files. And easy to use Makefile.

An error occurred while connecting to the external database. When gcc-Wall file. c/usr/lib/libm. a-o file is used, the system prompts that this library does not exist. However, when gcc-Wall file. c-lm-o file is used, the compilation is successful and the program runs normally. Therefore, I have understood the meaning of-lm. The library libm. a does exist in my system. Then I used the find command and found that libm. a on my system is in the/usr/lib/x86_64-linux-gnu/folder. Is this the difference between a 64-bit host and a 32-bit host?