[Clfs-dev] GCC 4.3.0 build options, tests results and comments

[David Broadfoot]

First off, Thanks for going though and writing this all up. We have 
slated this update for after the current release of the book.

Again, thanks for this, and I know that if I get time to play with this, 
I will use your notes here to help me.

Dave

Gabriel Barazer wrote:
> Hi,
>
> I spent the last 4 days looking at all the options used for building 
> GCC 4.3.0. I also compared to the old build options (in LFS/CLFS 
> books, in gentoo,debian and fedora systems) as well as the ones in the 
> only Linux distribution providing gcc 4.3 natively as far as I know 
> (Fedora 9 preview, stable out in ~10 days).
> Many build options are now deprecated, and a whole list of build 
> options, as usual, does not exists: each subsystem of gcc contains its 
> own configure script with new options that you have to define when 
> running the main script. The best way to see all the possible options 
> is to run all the configure scripts with the --help switch e.g.
> for i in $(find . -name 'configure'); do echo $i; $i --help; done
> in the gcc 4.3.0 source directory
>
> Here is a list of options which are still valid as of gcc-4.3.0:
> ../gcc-4.3.0/configure --prefix=/usr --libdir=/usr/lib64 
> --libexecdir=/usr/lib64 --mandir=/usr/share/man 
> --infodir=/usr/share/info --enable-bootstrap --enable-shared 
> --enable-threads=posix --enable-__cxa_atexit --enable-checking=release 
> --with-system-zlib --enable-languages=c,c++
>
> I compared to the configure options provided for gcc 4.2.2 in the CLFS 
> manual (SVN 20080228 x86_64). These are not needed anymore:
> --enable-c99: on by default
> --enable-long-long: on by default
> --enable-clocale=gnu: detection is automatic and correct
> --disable-libstdcxx-pch: on by default, depends on 
> --enable-hosted-libstdcxx which is also on by default
>
> other options that _might_ be useful, although on by default:
> --enable-multilib
> --enable-bootstrap
> --enable-shared
> --with-system-zlib : obviously, this one has to be removed when 
> building gcc on a new system without zlib (or maybe we could build 
> zlib with the cross compiler before the final gcc build).
>
> I also compared the fedora 9 build options for gcc-4.3: looks like 
> they were in a hurry and forgot an old option:
> --disable-libunwind-exceptions: doesn't exist anymore since 2004, 
> always disabled except if an external libunwind is specified with 
> --with-system-libunwind
> all the other options such as --disable-dssi or --enable-plugin are 
> for java
>
> GCC 4.3.0 is still using an old autoconf version, so we have to fix 
> the man/info pages paths with --mandir and --infodir
>
> Last note: gcc's libiberty is not identical anymore to the one in 
> binutils. The most recent one is in gcc, I guess we have to correct 
> that as well in the manual.
>
> Next move: testing. No serious errors have been detected according to 
> the test summary:
> -----
> === g++ tests ===
>
>
> Running target unix
> WARNING: Could not compile g++.dg/compat/struct-layout-1 generator
>
> === gcc tests ===
>
>
> Running target unix
> WARNING: Could not compile gcc.dg/compat/struct-layout-1 generator
> XPASS: gcc.dg/cpp/cmdlne-dI-M.c scan-file 
> (^|\\\\n)cmdlne-dI-M.*:[^\\\\n]*cmdlne-dI-M.c
> XPASS: gcc.dg/cpp/cmdlne-dM-M.c scan-file 
> (^|\\\\n)cmdlne-dM-M[^\\\\n]*:[^\\\\n]*cmdlne-dM-M.c
>
> === libmudflap tests ===
>
>
> Running target unix
> FAIL: libmudflap.c++/pass41-frag.cxx execution test
> FAIL: libmudflap.c++/pass41-frag.cxx ( -O) execution test
> FAIL: libmudflap.c++/pass41-frag.cxx (-O2) execution test
> FAIL: libmudflap.c++/pass41-frag.cxx (-O3) execution test
>
> === libstdc++ tests ===
>
>
> Running target unix
> XPASS: 26_numerics/headers/cmath/c99_classification_macros_c.cc (test 
> for excess errors)
>
> -----
>
> The failed libmudflap tests are a known problem related to timeouts 
> being too short.
>
> Another note regarding the tests: some gcc tests are _very_ memory 
> hungry (~1.5GB). I think it is important to warn users about this in 
> the manual.
>
> Can anyone update the book to include gcc 4.3.0 ?
>
> Gabriel
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