Re: [gentoo-user] Re: How to alter ./configure flags from emerge

["Francesco R." <vivo@gentoo.org>]

Alle 19:37, mercoledì 23 novembre 2005, Harry Putnam el ga butta:
> |"Francesco R." <vivo@gentoo.org> writes:
> |
> |
> |[...] Snipped good info here  ...  Thanks
> |
> |> also the "configure" option you see at compile time may _not_ be
> |> the same the ebuild used, _but_ what the ebuild set always
> |> override the MySQL default.
> |
> |So we cannot really tell what is passed to the compiler?  The output
> |of emerge is just nonsense compared to what really happens?

The output of emerge _is_ what really happens, as it's the output from 
the build system (auto* tools and gcc)
Consider the first "configure" you find:

------------
/var/tmp/portage/mysql-5.0.16-r2/work/mysql
>>> Source unpacked.
 * before to use federated engine be sure to read
 * http://dev.mysql.com/doc/mysql/en/federated-limitations.html
 * econf: updating mysql/bdb/dist/config.guess 
with /usr/share/gnuconfig/config.guess
 * econf: updating mysql/bdb/dist/config.sub 
with /usr/share/gnuconfig/config.sub
 * econf: updating mysql/config.guess 
with /usr/share/gnuconfig/config.guess
 * econf: updating mysql/config.sub with /usr/share/gnuconfig/config.sub
./configure --prefix=/usr --host=i686-pc-linux-gnu 
--mandir=/usr/share/man [......] --without-big-tables 
--build=i686-pc-linux-gnu
checking build system type... i686-pc-linux-gnu
------------

for example "--build=i686-pc-linux-gnu" it's not directly setted by the 
ebuild (speaking of ebuild code, not the portage one)

and this other (sub)configure, it also contain option not setted by the 
ebuild.

---------------
config.status: executing default commands
configure: configuring in innobase
configure: running /bin/sh './configure' --prefix=/usr  
'--prefix=/usr' [......] --cache-file=/dev/null --srcdir=.
checking build system type... i686-pc-linux-gnu
---------------

As a final ans side note, it's gentoo policy that the ebuild set all the 
configure options avaiable to it (but it's not _mandated_ to leave the 
user the possibility to select them via use-flags).


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