cpython

History

Victor Stinner c0e77364ca [3.6] bpo-30923: Silence fall-through warnings included in -Wextra since gcc-7.0 (#3518 ) * bpo-30923: Disable warning that has been part of -Wextra since gcc-7.0. (#3142) (cherry picked from commit `d73a960c57`) * bpo-30923: Silence fall-through warnings included in -Wextra since gcc-7.0. (#3157) (cherry picked from commit `f432a3234f`) * bpo-31275: Small refactoring to silence a fall-through warning. (#3206) (cherry picked from commit `138753c1b9`)		2017-09-12 16:09:44 -07:00
..
libmpdec	[3.6] bpo-30923: Silence fall-through warnings included in -Wextra since gcc-7.0 (#3518 )	2017-09-12 16:09:44 -07:00
tests	[3.6] bpo-27425: Be more explicit in .gitattributes (GH-840) (GH-2083)	2017-06-10 15:39:29 -05:00
README.txt	Remove trailing whitespace.	2013-01-16 15:16:10 +01:00
_decimal.c	[3.6] bpo-31406: Fix crash due to lack of type checking in subclassing. (GH-3477) (#3479 )	2017-09-10 18:46:49 +02:00
docstrings.h	Issue #25928 : Add Decimal.as_integer_ratio(). Python parts and docs by	2015-12-28 23:02:02 +01:00

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).