Use MPIR for Big* numbers on Windows
#11412
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HertzDevil
added
kind:feature
platform:windows
oprypin
reviewed
Nov 9, 2021
straight-shoota
approved these changes
Nov 9, 2021
oprypin
approved these changes
Nov 11, 2021
oprypin
approved these changes
Nov 15, 2021
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This PR adds support for the
BigInt,BigFloat,BigRational, andBigDecimaltypes on Windows by using MPIR, an API-compatible fork of GMP. The main benefit is it provides Visual Studio projects, so setup on CI is quite easy compared to GMP's autoconf-based workflow. All existingBig*-related specs pass except for the accuracy loss inBigFloat#**(GMP and MPIR do nothing about this, but MPFR does; see #11410).Due to the size differences of
LibC::Longbetween Linux 64-bit and Windows 64-bit, GMP probably wouldn't work on the latter even if it successfully compiles. But we don't need to switch to MPIR for the former either, since GMP is readily available there.