------- Comment #17 from fxcoudert at gcc dot gnu dot org 2006-03-07 15:42
-------
(In reply to comment #15)
> I did manage to get GCC-4.1.0 Fortran to build, I simple 'reworked'
> GMP/MPFR...
OK. I'm closing this PR since it's not a bug in gfortran, but a mis-compilation
in GMP/MPFR.
> I built GMP with the following:
>
> CC=gcc-3.2.3 CXX=g++-3.2.3 CPP=cpp-3.2.3 \
> CFLAGS="-O2 -mieee -finline -fomit-frame-pointer -mtune=ev56 -w -pipe" \
> CXXFLAGS="-O2 -mieee -finline -fomit-frame-pointer -mtune=ev56 -w -pipe" \
> ./configure \
> --build=alpha-alpha-linux \
> --prefix=/usr \
> --sysconfdir=/etc \
> --infodir=/usr/info \
> --mandir=/usr/man \
> --disable-cxx \
> --disable-nails \
> --disable-mpfr
>
> MPFR:
>
> CC="ccache gcc-3.2.3" CXX="ccache g++-3.2.3" CPP="ccache cpp-3.2.3" \
> CFLAGS="-O2 -fno-strict-aliasing -fomit-frame-pointer -mtune=ev56 -w -pipe" \
> CXXFLAGS="-O2 -fomit-frame-pointer -mtune=ev56 -w -pipe" \
> ./configure \
> --build=alpha-alpha-linux \
> --prefix=/usr \
> --sysconfdir=/etc \
> --infodir=/usr/info \
> --mandir=/usr/man \
> --enable-shared \
> --enable-mpfr
Please note that GMP/MFPR are well known for miscompiling. The GMP webpage is
full of warnings that builds with non-default options (and exotic or recent
compilers) are very risky.
As gfortran uses GMP/MPFR only at compile time (it's not used in the generated
code) and for very few tasks, I'd advise not to look for performance but for
safety. CFLAGS="-O2 -mieee -finline -fomit-frame-pointer -mtune=ev56 -w -pipe"
seems very risky to me, given my bad experiences with GMP.
--
fxcoudert at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|FIXED |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26564
