See http://websympa.loria.fr/wwsympa/arc/mpfr/2009-07/msg00031.html
and the following discussion.
This was on t2.math.washington.edu with
/usr/local/gcc-4.4.0-sun-linker/bin/gcc:
zimme...@t2:/tmp/mpfr-2.4.1$ /usr/local/gcc-4.4.0-sun-linker/bin/gcc -v
Using built-in specs.
Target: sparc-sun-solaris2.10
Configured with: /home/kirkby/gcc-4.4.0/configure CC=/usr/sfw/bin/gcc
--prefix=/usr/local/gcc-4.4.0-sun-linker --without-gnu-as --without-gnu-ld
--with-as=/usr/ccs/bin/as --with-ld=/usr/ccs/bin/ld
--enable-languages=c,c++,fortran --with-mpfr-lib=/usr/local/lib
--with-mpfr-include=/usr/local/include --with-gmp-include=/usr/local/include
--with-gmp-lib=/usr/local/lib --with-libiconv-prefix=/usr/lib/iconv
Thread model: posix
gcc version 4.4.0 (GCC)
--
Summary: gcc 4.4.0 miscompiles mpfr-2.4.1
Product: gcc
Version: 4.4.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: zimmerma+gcc at loria dot fr
GCC build triplet: sparc-sun-solaris2.10
GCC host triplet: sparc-sun-solaris2.10
GCC target triplet: sparc-sun-solaris2.10
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40757
