1 2 3 About 4 ===== 5 6 _decimal.c is a wrapper for the libmpdec library. libmpdec is a fast C 7 library for correctly-rounded arbitrary precision decimal floating point 8 arithmetic. It is a complete implementation of Mike Cowlishaw/IBM's 9 General Decimal Arithmetic Specification. 10 11 12 Build process for the module 13 ============================ 14 15 As usual, the build process for _decimal.so is driven by setup.py in the top 16 level 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 33 It is possible to override autodetection by exporting: 34 35 PYTHON_DECIMAL_WITH_MACHINE=value, where value is one of the above options. 36 37 38 NOTE 39 ==== 40 41 decimal.so is not built from a static libmpdec.a since doing so led to 42 failures on AIX (user report) and Windows (mixing static and dynamic CRTs 43 causes locale problems and more). 44 45 46 47
