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README.md

Givaro: C++ library for arithmetic and algebraic computations

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LICENSE


Givaro is distributed unded the terms of the CeCILL-B free software license (see COPYING).

PURPOSE


Givaro main features are implementations of the basic arithmetic of many mathematical entities: Primes fields, Extensions Fields, Finite Fields, Finite Rings, Polynomials, Algebraic numbers, Arbitrary precision integers and rationals (C++ wrappers over gmp), fixed precision integers. It also provides data-structures and templated classes for the manipulation of basic algebraic objects, such as vectors, matrices, univariate polynomials (and therefore recursive multivariate). It contains different program modules and is fully compatible with the FFLAS-FFPACK and LinBox linear algebra libraries.

Download and install


For lastest releases, please check out this website; older releases can be found on that website. Then, you can install doing:

> tar -zxvf givaro-*.tar.gz
> cd givaro-*
> ./configure --prefix=##GIVAROROOT#
> make install

Configuration can be adapted. Check configure --help to print the parameter choices.

In particular if GMP is not installed to the default location you might need to add for instance --with-gmp=##GMPROOT#/gmp-x-y-z to the configure line.

Also, on non-Linux systems you might need to use gmake instead of make.

Compile your own files


Givaro uses pkgconfig to expose the compilation flags it requires.

You will get the compilation flags by calling

pkg-config --cflags givaro

and the linking flags by calling

pkg-config --libs givaro

If you have installed givaro in a non-standard directory (such as /usr/local), make sure to have added the path where to find givaro's .pc file to the PKG_CONFIG_PATH environment variable.

PKG_CONFIG_PATH=${PKG_CONFIG_PATH}:<path to your givaro install>/lib/pkgconfig

An alternative option is to just add the following line to your Makefile. Then a simple call will compile your C and C++ files.

include ##GIVAROROOT##/bin/givaro-makefile

Frequently Asked Questions

  • When compiling, I get error messages similar to
/tmp/ccjZqIED.s: Assembler messages:
/tmp/ccjZqIED.s:142: Error: operand type mismatch for `vxorps'
/tmp/ccjZqIED.s:768: Error: no such instruction: `shlx %rax,%rdx,%rdx'
/tmp/ccjZqIED.s:1067: Error: no such instruction: `shlx %rax,%rdx,%rdx'

It means that the assembler is not capable of handling instructions generated by the compiler. You should either upgrade your assembler (e.g., by upgrading binutils on Linux) or use CXXFLAGS in ./configure to controls the instructions generated by the compiler (e.g., by adding -march=..., or -mno-avx2 or similar, depending on your machine and assembler version).

For more information, see this link.

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