termux/termux-packages

libllvm does not create a native llvm-config

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#879 opened on Mar 25, 2017

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Description

Cross compiling llvm builds a native (host=build) version of llvm-config as a make step. But in termux, this is not the case. The native llvm-config is built for target host. The native build takes place in $TERMUX_PKG_BUILDDIR/NATIVE. I was unable to find the root cause, but, the native build also uses $TERMUX_STANDALONE_TOOLCHAIN/bin/clang++. I suspect that this may be a bug in the cross compilation mechanism of cmake itself.

This is required to build rustc and other packages dependent on llvm-config.

Contributor guide

Research direction
Inspect the NATIVE build directory in $TERMUX PKG BUILDDIR/NATIVE. Compare the compiler paths used in the native build with the target build. Verify that the correct host compiler is used. Check CMake toolchain files for any overrides that might affect the native build. Look for environment variables like CC and CXX that might be set incorrectly.
Tech stack
shell
Domain
build system
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.
3-5 days
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.
Clear
Prerequisites
None
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30