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Date: Fri, 23 Nov 2012 22:15:33 -0800
From: Isaac Dunham <>
Cc: Florian Fainelli <>,
Subject: Re: Support for musl libc in OpenWrt

On Fri, 23 Nov 2012 21:10:33 +0100
Florian Fainelli <> wrote:

> Hi All,
> Support for musl libc in OpenWrt has been added in revision r34314, 
Glad to hear it!

> Note that the following issues are known:
> - unable to complete libstdc++ build due to some missing declarations (WIP)
Are you using the default "linux-gnu" libstdc++, or the "generic" target?
Only the latter is known to work at this point.

> - MIPS and MIPSel ports are not functionnal (details below)

> --
> MIPS and MIPSel specific issues:
> using qemu's binary emulation (qemu-mips[el]) against a statically 
> linked binary works, a dynamic binary makes my host qemu segv. Using 
> qemu-system-mips[el], the binary segfaults while being executed by the 
> kernel. So far I have not had the time to debug this further.

There are likely other issues, but are you using a hardfloat-compatible kernel (FPU emulation enabled)?
At present, musl/mips relies on certain instructions that the kernel  ordinarily emulates when they aren't supported.

Isaac Dunham <>

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