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Date: Wed, 23 Mar 2016 09:28:40 -0400
From: Kurt H Maier <>
Subject: Re: Why there's no __MUSL__ macro question

On Wed, Mar 23, 2016 at 01:08:16PM +0000, Sérgio Marques wrote:
> How are we expected to solve this kind of problem if not by using the
> __MUSL__ macro?

The recommended solution is to fix the code to be portable, instead of
installing yet another special-case workaround.

In this case, wrapping the "#include <execinfo.h>" line in an
#ifdef __GLIBC__ would be more appropriate than special-casing for musl,
since musl is not the only environment that lacks execinfo.h.  I suspect
this code would also fail to build on cygwin, for instance.

If there existed a __MUSL__ macro, the maintainers of software like this
would just use it instead of writing portable code.  By refusing to
implement a __MUSL__ macro, musl is helping to urge projects in the
right direction.


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