How to force clang to use libc++?

To: "pkgsrc-users%NetBSD.org@localhost" <pkgsrc-users%NetBSD.org@localhost>
Subject: How to force clang to use libc++?
From: "hung.nguyengia" <hung.nguyengia%protonmail.com@localhost>
Date: Tue, 29 Jun 2021 15:46:00 +0000

I'm trying to use pkgsrc with clang as the compiler. Clang by default still uses libstdc++ as the standard library. I found I could force it to use libc++ with this line in mk.conf:

CXXFLAGS+= -stdlib=libc++

But lang/nodejs still fails to build. I found when compiling clang used libc++ headers so compilation when really straight forward but when linking it still default to link with libstdc++ so this cause the problem.

What is the correct way to force clang to use libc++?

Follow-Ups:
- Re: How to force clang to use libc++?
  - From: Mansour Moufid
- Re: How to force clang to use libc++?
  - From: Tobias Nygren

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