18th Linux Standard

GCC options:

1. Control the compilation options for the standard version

-ansi tells the compiler to comply with the ISO C90 standard

-std=:

c89,iso9899: The latest ISO c90 standard, gnu89:c89 standard

2. Constants that control the standard version

__strict_anti__

_posix_c_source=2

_bsd_source:

_gnu_source

3. Compiler warning Options

-pedantic:

The code can be made as portable as possible

-wformat:

Check that the parameters of the printf series are of the correct type

-wparenthese-wswitch-default-wunused-wall

Interfaces and LSB

18th Linux Standard