[gentoo-amd64] eselect-compiler and multilib toolchain support

[gentoo-amd64] eselect-compiler and multilib toolchain support

[Jeremy Huddleston]

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So we're one step closer to getting multilib toolchain to the point
where we can drop ABI and base everything off of CHOST.  I just
committed eselect-compiler to portage (in package.mask) which will be
replacing gcc-config.  If you'd like to test it out, add the following
to /etc/portage/package.unmask:

app-admin/eselect-compiler
sys-devel/gcc-config

Most of the gcc-config commands should be the same, but you have a bit
more control using 'eselect compiler'.  If you've emerged gcc within the
last week, then you'll have the multilib profiles automatically.  If
not, the upgrade process tries to set it up for you automatically.  It
works fine for the normal user, but it's not smart enough to figure out
how to create the multilib profiles, so you'll either have to re-emerge
gcc or edit the configs in /etc/eselect/compiler yourself (see attached
examples).

If you edit the configs manually, do a 'eselect compiler update' to make
sure the wrappers are up to date.  This will result in you having an
i686-pc-linux-gnu- prefixed compiler set rather than using 'gcc32' or
remembering the '-m32' in CFLAGS.  You can also use a separate version
and specs for the x86 and amd64 toolchains this way.

Please test this out, break it, and send me feedback and patches.  Once
this gets cleaned up and hammered out, we can do the same for
binutils-config as well...

Thanks,
Jeremy

[-- Attachment #1.2: selection.conf --]
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[global]
	default_ctarget=x86_64-pc-linux-gnu
	native_ctarget=x86_64-pc-linux-gnu
	scan_path=0

[i386-pc-linux-gnu]
	profile=x86_64-pc-linux-gnu-3.4.4/x86-vanilla

[i686-pc-linux-gnu]
	profile=x86_64-pc-linux-gnu-3.4.4/x86-hardened

[x86_64-pc-linux-gnu]
	profile=x86_64-pc-linux-gnu-3.4.4/amd64-hardened

[-- Attachment #1.3: x86_64-pc-linux-gnu-3.4.3.conf --]
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[global]
	version=x86_64-pc-linux-gnu-3.4.3
	binpath=/usr/x86_64-pc-linux-gnu/gcc-bin/3.4.3
	manpath=/usr/share/gcc-data/x86_64-pc-linux-gnu/3.4.3/man
	infopath=/usr/share/gcc-data/x86_64-pc-linux-gnu/3.4.3/info
	stdcxx_incdir=g++-v3
	alias_cc=gcc
	alias_f77=g77
	alias_gfortran=g77

[x86-vanilla]
	ctarget=i686-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/32
	cflags=-m32 -L/emul/linux/x86/lib -L/emul/linux/x86/usr/lib

[x86-hardened]
	ctarget=i686-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/32
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/hardened.specs
	cflags=-m32 -L/emul/linux/x86/lib -L/emul/linux/x86/usr/lib

[x86-hardenednossp]
	ctarget=i686-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/32
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/hardenednossp.specs
	cflags=-m32 -L/emul/linux/x86/lib -L/emul/linux/x86/usr/lib

[x86-hardenednopie]
	ctarget=i686-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/32
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/hardenednopie.specs
	cflags=-m32 -L/emul/linux/x86/lib -L/emul/linux/x86/usr/lib

[x86-hardenednopiessp]
	ctarget=i686-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/32
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/hardenednopiessp.specs
	cflags=-m32 -L/emul/linux/x86/lib -L/emul/linux/x86/usr/lib

[amd64-vanilla]
	ctarget=x86_64-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3

[amd64-hardened]
	ctarget=x86_64-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/hardened.specs

[amd64-hardenednossp]
	ctarget=x86_64-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/hardenednossp.specs

[amd64-hardenednopie]
	ctarget=x86_64-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/hardenednopie.specs

[amd64-hardenednopiessp]
	ctarget=x86_64-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.3/hardenednopiessp.specs

[-- Attachment #1.4: x86_64-pc-linux-gnu-3.4.4.conf --]
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[global]
	version=x86_64-pc-linux-gnu-3.4.4
	binpath=/usr/x86_64-pc-linux-gnu/gcc-bin/3.4.4
	manpath=/usr/share/gcc-data/x86_64-pc-linux-gnu/3.4.4/man
	infopath=/usr/share/gcc-data/x86_64-pc-linux-gnu/3.4.4/info
	stdcxx_incdir=g++-v3
	alias_cc=gcc
	alias_f77=g77
	alias_gfortran=g77

[x86-vanilla]
	ctarget=i686-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/32
	cflags=-m32 -L/emul/linux/x86/lib -L/emul/linux/x86/usr/lib

[x86-hardened]
	ctarget=i686-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/32
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/hardened.specs
	cflags=-m32 -L/emul/linux/x86/lib -L/emul/linux/x86/usr/lib

[x86-hardenednossp]
	ctarget=i686-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/32
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/hardenednossp.specs
	cflags=-m32 -L/emul/linux/x86/lib -L/emul/linux/x86/usr/lib

[x86-hardenednopie]
	ctarget=i686-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/32
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/hardenednopie.specs
	cflags=-m32 -L/emul/linux/x86/lib -L/emul/linux/x86/usr/lib

[x86-hardenednopiessp]
	ctarget=i686-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/32
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/hardenednopiessp.specs
	cflags=-m32 -L/emul/linux/x86/lib -L/emul/linux/x86/usr/lib

[amd64-vanilla]
	ctarget=x86_64-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4

[amd64-hardened]
	ctarget=x86_64-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/hardened.specs

[amd64-hardenednossp]
	ctarget=x86_64-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/hardenednossp.specs

[amd64-hardenednopie]
	ctarget=x86_64-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/hardenednopie.specs

[amd64-hardenednopiessp]
	ctarget=x86_64-pc-linux-gnu
	ldpath=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4
	spec=/usr/lib/gcc/x86_64-pc-linux-gnu/3.4.4/hardenednopiessp.specs

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[gentoo-amd64] Re: eselect-compiler and multilib toolchain support

[Duncan]

Jeremy Huddleston posted <1128138531.768.5.camel@cloud.outersquare.org>,
excerpted below,  on Fri, 30 Sep 2005 20:48:51 -0700:

> So we're one step closer to getting multilib toolchain to the point
> where we can drop ABI and base everything off of CHOST.  I just
> committed eselect-compiler to portage (in package.mask) which will be
> replacing gcc-config.  If you'd like to test it out, add the following
> to /etc/portage/package.unmask:
> 
> app-admin/eselect-compiler
> sys-devel/gcc-config

Very cool!  I've followed the intro on the dev list, but I've been busy
and not as bleeding edge lately as normal, so haven't yet merged it as I
had no time to manually configure it and trace down errors.  Things are
getting a bit more sane again, lately, and I'm about caught up, so this
looks to be one of my first "new" projects I'll be trying...

-- 
Duncan - List replies preferred.   No HTML msgs.
"Every nonfree program has a lord, a master --
and if you use the program, he is your master."  Richard Stallman in
http://www.linuxdevcenter.com/pub/a/linux/2004/12/22/rms_interview.html


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