scala-native/scala-native

Provide bindings for libc

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#104 opened on May 18, 2016

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 (24 comments) (0 reactions) (0 assignees)Scala (4,654 stars) (386 forks)batch import
component:nativelibfeaturegood first issueinterop

Description

For sake of having nice interop with C we need to have access to all the same base libraries. The full list of header files is given below:

  • assert.h (not useable without C-style macros.)
  • complex.h
  • ctype.h
  • errno.h
  • fenv.h
  • float.h
  • inttypes.h
  • iso646.h
  • limits.h
  • locale.h
  • math.h
  • setjmp.h
  • signal.h
  • stdalign.h
  • stdarg.h
  • stdatomic.h
  • stdbool.h
  • stddef.h
  • stdint.h
  • stdio.h
  • stdlib.h
  • stdnoreturn.h
  • string.h
  • tgmath.h
  • threads.h
  • time.h
  • uchar.h
  • wchar.h
  • wctype.h

Each header would map to a single extern object in scala.scalanative.libc package. Some of the headers might not map directly or need some additional compiler magic, we need to discover those cases sooner rather than later.

Contributor guide

Tech stack
c
Domain
tooling
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
over 1 week
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
ScalaC programmingScala Native internals
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
15
Research direction
This issue involves providing Scala Native bindings for the remaining libc headers. Contributors should examine already implemented headers (e.g., stdio.h, stdlib.h) in the scala.scalanative.libc package for examples. The 24 comments contain discussions on implementation strategies and potential compiler magic needed for headers like setjmp.h or threads.h. Focus on one unchecked header at a time, starting with simpler ones like limits.h or time.h.