config.guess manufacturer string?

[Ralf Corsepius]

Panu Matilainen wrote:
> On Wed, 18 Feb 2009, Dan Nicholson wrote:
> 
>> On Wed, Feb 18, 2009 at 9:13 AM, Stepan Kasal <skasal at redhat.com> wrote:
>>>
>>> Actually, if you care about the host triplet used for rpm builds,
>>> that's something where config.guess is not directly involved.
>>>
>>> Most spec files call %configure.  That macro calls configure with
>>> option --build.  With that option given, configure does not call
>>> config.guess.

>> The advantage of setting --build correctly is that autoconf macros
>> will use test against the triplet will work as expected. For instance
>> AC_PROG_CC will search for gcc with the host triplet prefixed. Right
>> now, it searches for x86_64-unknown-linux-gnu-gcc. That's not how gcc
>> is installed on fedora (nor with the -gnu, but that's a separate
>> matter).
> 
> Right, there's /usr/bin/x86_64-redhat-linux-gcc instead, and quite 
> obviously the build tools should be configured to match within the 
> distro.
Please elaborate.

Unlike you're saying, it's actually not obvious.

/usr/bin/x86_64-redhat-linux-gcc only exists as legacy being installed 
in parallel to /usr/bin/gcc for cases where people are violently passing 
--build/--host/--target (such as current rpm).

> But where does the redhat in the gcc name come from?

It originates from the value having been passed to GCC's --target as 
part of configuring GCC.

Ralf