有没有办法只编译POSIX API

Question

I am developing a system that must be fully POSIX compatible

I am developing this on Fedora Core 14 with gcc and c++

I do not want to use anything that is not POSIX

How do I ensure I maintain this?

is there a compiler setting?

I am using Codeblocks

Answer 1

No, there's no "magic compiler switch" to insure you use only Posix APIs.

You can get the POSIX spec here:

• http://www.opengroup.org/onlinepubs/9699919799/toc.htm

• http://www.opengroup.org/bookstore/catalog/c082.htm

This suite allows you to check your application for conformance to the POSIX API:

• http://www.knosof.co.uk/poschk.html

Answer 2

This does not really have anything to do with the compiler. POSIX specifies utilities, interfaces and the accompanying header files - the compiler is only concerned with the specifics of the programming language.

That said, if the header file set that you are using is well-implemented you should be able to enable/disable the feature sets that you are using with proper -D and -U options for gcc .

For example including fcntl.h will not allow access to fallocate() unless _GNU_SOURCE has been defined. With the same header, you need to define _POSIX_C_SOURCE to 200809L or greater for the F_DUPFD_CLOEXEC fcntl() to be available.