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nim-decimal/decimal/mpdecimal_wrapper
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mratsim 865d3c20c8 updated generation readme 2018-03-22 17:53:54 +01:00
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generated updated generation readme 2018-03-22 17:53:54 +01:00
mpdecimal_sources Reorg source files 2018-03-22 12:04:46 +01:00
README.md updated generation readme 2018-03-22 17:53:54 +01:00
genSources.sh Separate the config.h 2018-03-22 17:49:17 +01:00

README.md

Wrapper for mpdecimal

For users

When installing through nimble, configuration is done automatically.

For development on your local machine

mpdecimal checks at compile-time if the computer is 32-bit or 64-bit and GCC builtin __uint128_t. It then generates mpdecimal.h from the template mpdecimal.h.in.

To support multiple architectures: x86_64, ARMv7 32-bit and ARMv9 64-bit you should run the genSources.sh build script which would configure mpdecimal properly for your platform.

Details

When doing ./configure, mpdecimal creates:

  • Makefile (unused)
  • libmpdec/Makefile (unused)
  • tests/Makefile (unused)
  • limpdec/mpdecimal.h (used everywhere)
  • config.h (contains global defines like pointer size and uint128 support)

For our Nim wrapping purpose:

  1. We copy the source files in a temp dir mpdecimal_temp
  2. We run .configure in this dir
  3. We copy config.h to a generateddestination folder
  4. We append #include "config.h" and copy the .h and .c files to the generated destination folder
  5. We delete mpdecimal_temp