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Date: Fri, 28 Aug 2015 16:16:02 +0200
From: Szabolcs Nagy <>
Subject: Re: _Unwind_Backtrace crashes

* Alexander Monakov <> [2015-08-28 16:21:08 +0300]:
> I was able to reproduce this using the musl-gcc wrapper on a glibc-based
> system.  I tracked it down to dl_iterate_phdr callback in libgcc failing to
> find PT_GNU_EH_FRAME header in this loop:
> And indeed adding -Wl,--eh-frame-hdr to the musl-gcc command line fixes it.

here the test works even without .eh_frame_hdr with gcc-5.1 (alpine, musl based toolchain).

but i see the same failure with gcc-4.9.2 (debian, glibc based) and then --eh-frame-hdr fixes it.

> Normally this ld option is present in built-in specs, but musl-gcc's specs
> don't set it.
> Alexander

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