Dear David,
as Vincent Lefèvre said, the fact that MPFR uses the same CC/CFLAGS as GMP
(by reading them in gmp.h) is a new feature that solves many problems.
However in your case it seems the Solaris compiler (which was used to compile
GMP) fails to correctly compile MPFR.
Either you can try to investigate more the errors produced with the Solaris
compiler (but this is an old version of gcc, and more likely they are bugs
fixed either in gcc or in the Solaris port).
Or you can configure MPFR with CC=/usr/local/gcc-4.4.0-sun-linker/bin/gcc
to force the use of gcc 4.4.0.
You can also recompile GMP with gcc 4.4.0. Then MPFR will automatically pick
the right compiler.
Paul Zimmermann
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