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Installing MPFR
===============
0. You first need to install GMP. See <http://www.swox.com/gmp/>.
MPFR requires GMP version 4.1 or later.
After you have successfully built GMP and installed it using
"make install", you'll need to manually install some GMP header
files needed by MPFR. In the GMP build directory, type:
cp config.h gmp-impl.h gmp-mparam.h longlong.h GMPINSTALL/include
where GMPINSTALL is the directory where you have installed GMP,
i.e. you configured GMP with ./configure --prefix=GMPINSTALL.
1. In the MPFR build directory, type "./configure --with-gmp=GMPINSTALL"
where GMPINSTALL is the directory where you have installed GMP. If this
fails, please check that the C compiler and its options are the same as
those for the GMP build. You can see the later with the following:
grep "^CC\|^CFLAGS" GMPBUILD/Makefile
where GMPBUILD is the GMP build directory, then type (for example,
under a sh-compatible shell):
CC=<C compiler> CFLAGS=<compiler options> ./configure --with-gmp=GMPINSTALL
Other options can be seen with "./configure --help". For example, if you
want to install MPFR in /local instead of /usr/local (default), type:
./configure --prefix=/local
2. Type "make" (produces libmpfr.a). On some architectures, you should
provide further options to match those used by GMP, for example, on
powerpc-aix:
make AR="ar -X64"
3. Type "make dvi" to produce the documentation (DVI file mpfr.dvi).
4. Type "make check" (produces and runs the test files).
5. Type "make install" (installs the library in /usr/local or in the
directory given in the --prefix option of configure). You'll probably
need to be "root" to install MPFR in directories like /usr/local.
./configure options
===================
--prefix=DIR installs MPFR headers and library in DIR/include
and DIR/lib respectively
--with-gmp-include=DIR assumes that DIR contains gmp-impl.h, longlong.h...
--with-gmp-lib=DIR assumes that DIR contains libgmp.a
--with-gmp=DIR same as --with-gmp-lib=DIR/lib --with-gmp-include=DIR/include
Known problems.
===============
See file BUGS for known bugs in MPFR. Some patches may be available on the
MPFR web page <http://www.mpfr.org/> or <http://www.loria.fr/projets/mpfr/>.
Linux on Alpha is known to have problems with IEEE conformance. Also with
OSF and gcc 2.8.1, we had problems with the square root functions:
Testing tsqrt
libm.a differs from mpfr_sqrt for a=1.72800271916104480000e+210, rnd_mode=GMP_RNDZ
libm.a gives 1.31453517227993750000e+105, mpfr_sqrt gives 1.31453517227993730000e+105 (-1 ulp)
maybe you've found a bug in libm.a...
### tsqrt failed ###
Testing tsqrt_ui
mpfr_sqrt_ui differs from sqrt for a=851401618, rnd_mode=GMP_RNDU
sqrt gives 2.91787871235251990000e+04, mpfr_sqrt_ui gives 2.91787871235252020000e+04 (1 ulp)
maybe you've found a bug in libm.a
### tsqrt_ui failed ###
(in both cases the MPFR result is the correct one).
In case of problem.
===================
Please contact us at mpfr@loria.fr, indicating the machine and operating
system used (uname -a), the compiler and version used (gcc -v if you use
gcc), the compile options used if any, the version of GMP and MPFR used
and a description of the problem encountered.
If it is a problem concerning the MPFR compilation or test (i.e. during
configure, make or make check), please send us a log of the installation.
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