is the posix api and the c api used together? sorry . i am also confused about this two things . because i find that when i config the rtems kernel ,there is a option which is --enable posix.
bin.w...@qkmtech.com From: bin.w...@qkmtech.com Date: 2017-12-29 09:25 To: Chris Johns; Users Subject: Re: Re: the difference between posix user and c user i google the posix .now i know that posix is the abbreviation of "the Portable Operating System Interface" it is for software compatibility with variants of Unix and other operating systems but you said, "POSIX and the Classic API are both C APIs." than i think the posix is packaged on the basis of the standard C, is it right ? the classic api is the standard c interface , is it right? best wishes bin.w...@qkmtech.com From: Chris Johns Date: 2017-12-29 02:18 To: users Subject: Re: the difference between posix user and c user On 29/12/17 12:00 am, bin.w...@qkmtech.com wrote: > hi everyone: > > i am new to linux and rtems. i do not understand > what the difference between posix user and c user . > > i am confused about these two concept. which condition i should choose posix ? > which condition i should choose c ? > This is a good question and it is understandable why you do not understand the difference. The reason is specific to RTEMS and relates to it's history. The original RTEMS was written in Ada and C and the C API is what we now call the Classic API. It's manual was called the C User Guide hence the name. The Ada version of RTEMS was removed from the source tree and POSIX came a while later. POSIX and the Classic API are both C APIs. The C User manual is now called the RTEMS Classic API Guide. See: https://docs.rtems.org/ Chris _______________________________________________ users mailing list users@rtems.org http://lists.rtems.org/mailman/listinfo/users
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