This module wraps the MPC library functions. This version of Math::MPC needs mpc-0.8 or later. The MPC library is a C library for multiple-precision complex number computations with exact rounding. It is based on the MPFR C library which, in turn, is based on the GMP C library. MPC, like MPFR and GMP, is free. It is distributed under the GNU Lesser General Public License (GNU Lesser GPL). Because this module wraps the MPC functions, it requires that the MPC library (version 0.8.0 or later), the GMP library (version 4.3.2 or later) and the MPFR library (version 3.0.0 or later) have been installed. For the GMP library see: http://gmplib.org For the MPFR library see: http://www.mpfr.org Do not use the (outdated) MPFR library source that ships with the GMP source. For the MPC library see: http://www.multiprecision.org/mpc/ You'll also need to have Math::MPFR (version 2.01 or later) installed. To build this module you need perl 5.6.0 or later. I'm not sure of all the requirements to get it to build with earlier versions of perl, but it's definite that the XS code relating to operator overloading will not compile with perl versions prior to 5.6. Build in the usual way: perl Makefile.PL make make test make install When building this module, the MPC, GMP and MPFR libraries will need to be accessible. If those files are in a location where your compiler does not find them by default, then instead of running 'perl Makefile.PL', you'll need to run: perl Makefile.pl INC="-I/path/to/gmp_includes -I/path/to/mpfr_includes -I/path/to/mpc/include" LIBS="-L/path/to/mpc_lib -lmpc -L/path/to/mpfr_lib -lmpfr -L/path/to/gmp_lib -lgmp" ================================== 64-bit-int and long double support ================================== If your perl's Config reports that 'ivsize' is greater than or equal to 8 && 'ivtype' is not 'long', then Math::MPC will, by default, be built with access to the mpc_*_uj and mpc_*_sj functions. Else, access to those functions is, by default, denied. You can override the default by opening up the Makefile.PL and uncommenting the appropriate line (just a few lines down from the top of the file ... the comments in that file should make it clear). Similarly, if your perl's Config reports that 'nvsize' is greater than 8 then Math::MPC will be built with access to the mpc_*_ld functions. Else, access to those functions is, by default, denied. Again, you can override the default by opening up the Makefile.PL and uncommenting the appropriate line. I believe it to be both unnecessary and inadvisable to override the default - but if you do find that you need to override the default, please let me know. That you have found it necessary to override the default is something I probably ought to know about. =================== __float128 support =================== If $Config{nvtype} is __float128 then passing these values from perl to Math::MPC will be automatically supported - using Rmpc_set_NV and Rmpc_set_NV_NV functions. Returning the values (as __float128) from Math::MPC has to be done via accessing the real and imaginary parts as Math::MPFR objects (for which you use RMPC_RE and RMPC_IM) - and then using Rmpfr_get_NV to return the __float128 values. ========================= _Complex C types support ========================= The mpc library (beginning with version 0.9) provides support for assigning and returning the 'double _Complex' and 'long double _Complex' C data types. Therefore Math::MPC (beginning with version 0.90) provides optional support for assigning/returning Math::Complex_C (double _Complex) objects and Math::Complex_C::L (long double _Complex) objects, using the Rmpc_set_dc, Rmpc_set_ldc, Rmpc_get_dc and Rmpc_get_ldc functions. If Math::Complex_C or Math::Complex_C::L can be loaded then complex.h will be included in the compilation and, iff _MPC_H_HAVE_COMPLEX is thereby defined (in mpc.h), then Math::MPC will be built with support for the above mentioned set/get functions. If there's a need to override this default behaviour, just open the Makefile.PL and comment in the line of code that forces '$do_complex_h' to be assigned the value you want ... either -1 (to force exclusion of support), or 1 (to force support). Then run 'make realclean' and start over again. Any problems, let me know. I am contactable by email at sisyphus at(@) cpan dot (.) org.