[Keystone Slip #46] Change gcc-links

Thomas 'Balu' Walter tw at itreff.de
Sat Mar 24 09:38:39 PST 2001

+-lfs-book at linuxfromscratch.org-(lfs-book at linuxfromscratch.org)-[24.03.01 17:48]:
> Also, that would explain renaming to cpp0 even more -- forcing the use
> of /usr/bin/cpp. If we used that file (for our links) from the start,
> we wouldn't have any problems.

I've read the gcc-installation-docs today. There it says that 
"user leverl binaries can be found in prefix/bin"
So I think linking /lib/cpp and /usr/lib/cpp to that one will be
correct just as people said on lfs-discuss.

I'll try that during my next installation (which I hope to get done on

Other things I've noticed reading that docs (and which might should be

says that it is possible to install binutils together with gcc if you
just unpack the binutils distribution either in the same directory or a
separate one (which then has to be linked to) - even though this might
be shorter I think we should stay with the separate installation. It's
clearer what is going on then, but I don't know if the merged
installation has some advantages. ?!?

"These additional options control where certain parts of the
distribution are installed. Normally you should not need to use these
--with-gxx-include-dir=dirname -- Specify the installation directory for
        g++ header files. The default is /usr/local/include/g++."

I am not sure if we need to specify this include-dir - they say it is
not needed, but the default is wrong for us. then again I think it
might be $prefix/include/g++.for default...

"--enable-shared -- Build shared versions of the C++ runtime libraries if
        supported. This is the default on most systems. Use
        --disable-shared for static libraries. Note that up to the gcc
        version 2.95.x series, static libraries were the default on all

Looks like --enable-shared is not needed in Chapter 6.

What is --enable-threads for? Is it default?

--enable-cpp creates a shell script which emulates traditional cpp
functionality. Might be useful?

I've noticed that it is possible to "make bootstrap-lean" on systems
where you are short on disk-space. Perhaps add a note to the book?

Also it says that you can save roughly 40% of disk space both for the
bootstrap and the final installation if you build the libraries with 
        -fno-implicit-templates' bootstrap
(yes I know we have a optimization hint ;-)

That's it for now.


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