cosmopolitan

mirror of https://github.com/jart/cosmopolitan.git synced 2025-02-07 15:03:34 +00:00

History

Justine Tunney 0d748ad58e Fix warnings This change fixes Cosmopolitan so it has fewer opinions about compiler warnings. The whole repository had to be cleaned up to be buildable in -Werror -Wall mode. This lets us benefit from things like strict const checking. Some actual bugs might have been caught too.		2023-09-01 20:50:18 -07:00
..
libmpdec	Fix bugs in cosmocc toolchain	2023-06-08 23:44:03 -07:00
tests	python-3.6.zip added from Github	2021-08-09 05:39:42 -07:00
_decimal.c	Unbreak the x86-64 build	2023-06-16 20:05:24 -07:00
docstrings.h	Fix warnings	2023-09-01 20:50:18 -07:00
README.txt	python-3.6.zip added from Github	2021-08-09 05:39:42 -07:00

README.txt


About
=====

_decimal.c is a wrapper for the libmpdec library. libmpdec is a fast C
library for correctly-rounded arbitrary precision decimal floating point
arithmetic. It is a complete implementation of Mike Cowlishaw/IBM's
General Decimal Arithmetic Specification.


Build process for the module
============================

As usual, the build process for _decimal.so is driven by setup.py in the top
level directory. setup.py autodetects the following build configurations:

   1) x64         - 64-bit Python, x86_64 processor (AMD, Intel)

   2) uint128     - 64-bit Python, compiler provides __uint128_t (gcc)

   3) ansi64      - 64-bit Python, ANSI C

   4) ppro        - 32-bit Python, x86 CPU, PentiumPro or later

   5) ansi32      - 32-bit Python, ANSI C

   6) ansi-legacy - 32-bit Python, compiler without uint64_t

   7) universal   - Mac OS only (multi-arch)


It is possible to override autodetection by exporting:

   PYTHON_DECIMAL_WITH_MACHINE=value, where value is one of the above options.


NOTE
====

decimal.so is not built from a static libmpdec.a since doing so led to
failures on AIX (user report) and Windows (mixing static and dynamic CRTs
causes locale problems and more).