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Subject: Re: clang manual page?
To: sgk@troutmask.apl.washington.edu, Conrad Meyer <cem@freebsd.org>
Cc: freebsd-current <freebsd-current@freebsd.org>
References: <20180405223852.GA43120@troutmask.apl.washington.edu>
 <CAG6CVpUpj7B6ujUSCUkznCBKSGKcuM2czZ=VBgKK+km5wFwfmg@mail.gmail.com>
 <20180406001514.GA43793@troutmask.apl.washington.edu>
From: Pete Wright <pete@nomadlogic.org>
Message-ID: <347cc907-96b3-140d-5a8f-084f91283be5@nomadlogic.org>
Date: Thu, 5 Apr 2018 17:30:04 -0700
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On 04/05/2018 17:15, Steve Kargl wrote:
> This assumes that a gcc(1) is available on the system.
>
> % man gcc
> No manual entry for gcc
>
> If the system compiler is clang/clang++, then it ought to be
> documented better than it currently is.  Ian's suggests for
> 'clang --help' is even worse
>
> %  clang --help | grep -- -std
>    -cl-std=<value>         OpenCL language standard to compile for.
>    -std=<value>            Language standard to compile for
>    -stdlib=<value>         C++ standard library to use
>
> Does <value> == <language>?
>
a quick google search turns up the following additional information:

"clang supports the -std option, which changes what language mode clang 
uses. The supported modes for C are c89, gnu89, c99, gnu99, c11, gnu11, 
c17, gnu17, and various aliases for those modes. If no -std option is 
specified, clang defaults to gnu11 mode. Many C99 and C11 features are 
supported in earlier modes as a conforming extension, with a warning. 
Use |-pedantic-errors| to request an error if a feature from a later 
standard revision is used in an earlier mode."

https://clang.llvm.org/docs/UsersManual.html


-p


-- 
Pete Wright
pete@nomadlogic.org
@nomadlogicLA