ocaml/dune

How are compiled C++ stubs?

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#949 opened on Jul 3, 2018

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Description

I’m trying to build software that use dune as build system and have C++ stubs. And compilation fails. I’ve already reported https://github.com/AltGr/ocaml-mccs/issues/12 and https://github.com/janestreet/re2/issues/21.

My understanding is that there are C++ files which must be compiled by a C++ compiler; and dune asks the OCaml compiler whether it knows about a C compiler and uses the result. Is my understanding correct? Is that supposed to work? Can I manually override this to tell dune about a C++ compiler (e.g., to trust the CXX environment variable)?

Contributor guide

Research direction
Investigate how dune detects the C++ compiler for compiling C++ stubs. Check the dune source code for C++ compilation rules and environment variable handling, especially CXX. Look at related issues and documentation for workarounds.
Tech stack
cpp
Domain
build systemcompilers
Issue type
Bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
OCamlduneC++ build basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60