README.txt
1
2
3About
4=====
5
6_decimal.c is a wrapper for the libmpdec library. libmpdec is a fast C
7library for correctly-rounded arbitrary precision decimal floating point
8arithmetic. It is a complete implementation of Mike Cowlishaw/IBM's
9General Decimal Arithmetic Specification.
10
11
12Build process for the module
13============================
14
15As usual, the build process for _decimal.so is driven by setup.py in the top
16level directory. setup.py autodetects the following build configurations:
17
18 1) x64 - 64-bit Python, x86_64 processor (AMD, Intel)
19
20 2) uint128 - 64-bit Python, compiler provides __uint128_t (gcc)
21
22 3) ansi64 - 64-bit Python, ANSI C
23
24 4) ppro - 32-bit Python, x86 CPU, PentiumPro or later
25
26 5) ansi32 - 32-bit Python, ANSI C
27
28 6) ansi-legacy - 32-bit Python, compiler without uint64_t
29
30 7) universal - Mac OS only (multi-arch)
31
32
33It is possible to override autodetection by exporting:
34
35 PYTHON_DECIMAL_WITH_MACHINE=value, where value is one of the above options.
36
37
38NOTE
39====
40
41decimal.so is not built from a static libmpdec.a since doing so led to
42failures on AIX (user report) and Windows (mixing static and dynamic CRTs
43causes locale problems and more).
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