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Date: Wed, 24 Jul 2013 23:36:11 +0800
From: orc <>
Subject: Re: Missing symbols for supporting glibc-built

On Wed, 24 Jul 2013 10:47:27 -0400
Rich Felker <> wrote:

> On Wed, Jul 24, 2013 at 10:20:03PM +0800, orc wrote:
> > About a year ago while experimenting with musl desktop, various
> > binary blobs I unfortunately tied to (you should remember
> > short discuss about nvidia blob compatibility) I tried to use my
> > host with musl linker and that failed because of gnu
> > "unique symbol" extension. Did you encountered same problem here?
> > If so, is it solved now?
> I have only tested with simple C++ .so files using the musl-built
>, and so far, they've worked fine. These tests are by no
> means extensive, just "hello world". I have not tried using the
> glibc-built again; the "missing symbols" check was
> based purely on the output of:
>     nm -u -D | grep -v -e _[UJ] -e ' w '
> Do you know the subject line of the thread where your issue was
> discussed before? I'd be happy to go look and see if I think the issue
> is fixed now.

I did not send a report about this especially, just my experiments
showed that. Just because nvidia blob did not require at
all. But others did.
You can start reading somewhere in long 'Hello' thread about 6 Jul 2012.

Tested now:
- Hello world prog:
#include <iostream>
int main()
    std::cout << "Hello, world!" << std::endl;
    return 0;

% g++ -o test-cpp
% musl-out/lib/ ./test-cpp
[lots of "Error relocating..." errors]
% musl-out/lib/ ./test-cpp 2>&1 | fgrep _ZGVNSt7collateIwE2idE #
picking one
% nm /usr/lib/ | fgrep _ZGVNSt7collateIwE2idE
00000000002e40d8 u _ZGVNSt7collateIwE2idE
(man nm says that 'u' is "unique global" and gnu extension)

On musl system there is 'V' instead of 'u'.
Is my example falls under "glibc-built"?

> Rich

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