Date: Tue, 17 Aug 2010 11:04:06 -0400 From: Eitan Adler <lists@eitanadler.com> To: Daniel Nebdal <dnebdal@gmail.com> Cc: Dimitry Andric <dimitry@andric.com>, current@freebsd.org Subject: Re: Building world with clang Message-ID: <AANLkTinugt9jH3NDGKq02iojvmtwqZsYpsVcgBbXdGoi@mail.gmail.com> In-Reply-To: <AANLkTi=%2BMntj2KPSUXZj=1qCPCOMq9YORB2JhR6k9ztK@mail.gmail.com> References: <4C6A7357.8000606@andric.com> <19F5467B-6432-4531-BF04-62D8EB4F3093@gid.co.uk> <AANLkTi=wAhVDKX7vVd0Cds9zTSDQJ6vR%2BoyAbC-H_SK=@mail.gmail.com> <4C6A92E0.4050104@andric.com> <AANLkTi=%2BMntj2KPSUXZj=1qCPCOMq9YORB2JhR6k9ztK@mail.gmail.com>
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On Tue, Aug 17, 2010 at 10:28 AM, Daniel Nebdal <dnebdal@gmail.com> wrote:
> On Tue, Aug 17, 2010 at 3:47 PM, Dimitry Andric <dimitry@andric.com> wrot=
e:
>> On 2010-08-17 15:03, Daniel Nebdal wrote:
>>>>> However, a disadvantage is that the built-in search paths of the
>>>>> bootstrap compiler are not entirely disabled by using the -isysroot, =
-B
>>>>> and -L flags,
>> ...
>>> For clarification, did you (Dimitry, that is) mean
>>> a) The paths are still there so they could resurface if some Makefile
>>> doesn't specify those flags , or
>>> b) they sometimes come into play even when using the appropriate flags?
>>
>> Any sub-makefiles would not have to specify those flags explicitly,
>> since they were added to ${CC} and ${CXX}.
>>
>> But what I meant is that even if you specify those flags, the compiler
>> still searches for headers and libraries in the base system. =C2=A0So if=
some
>> header is removed from /usr/src, for example, but is still available in
>> /usr/include, it can be erroneously picked up during buildworld.
>>
>
> Mmh, I just read through the in-detail description you gave in another
> mail. It's a bit surprising that there isn't a simple and reliable way
> to disable/replace all hardcoded paths, but I guess it doesn't come up
> that often.
what about -nostdinc ?
Do not search the standard system directories for header files.
Or will this also disable the command line equivalents ?
--=20
Eitan Adler
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