http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47196
Tobias Burnus <burnus at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Component|bootstrap |libfortran
Resolution| |WONTFIX
--- Comment #1 from Tobias Burnus <burnus at gcc dot gnu.org> 2011-01-07
08:52:01 UTC ---
I would suggest that you read the libquadmath related part of
http://gcc.gnu.org/install/configure.html
If you do not want to use libquadmath in libgfortran, build with
--disable-libquadmath-support -- or supply a system version of libquadmath
library/header files. Whether libquadmath is build (as part of GCC) is
independent from whether Fortran (gfortran, libgfortran) uses libquadmath or
not. This allows for the following four combination:
a) Build libquadmath and Fortran with libquadmath-based REAL(16) support
(default on systems where __float128 is supported)
b) Build neither libquadmath nor libquadmath-based REAL(16) support
(obviously the default on systems lacking __float128 support;
Other use: Save a few kilobytes by having one library less)
c) Build libquadmath but no Fortran REAL(16) support
If one wants to save a few KiB for Fortran but wants to us libquadmath, e.g,
with C/C++
d) Don't build libquadmath, but support libquadmath-based REAL(16) in gfortran
Useful only if the system has already a (compatible) libquadmath
installation
libgfortran then links "-lquadmath" but the user/builder has to make sure
that
it is in the -I and the -L paths.
