[WIP] Support musl

[YangKeao]

Signed-off-by: Yang Keao keao.yang@yahoo.com

Related with #27 . But there are still problems to build on musl:

1. symbolic-demangle has to be modified to avoid dynamic linking with stdc++. cpp_link_stdlib(None) can simply solve this.

2. The backtrace works not well:

Here is an example running the multithread_flamegraph 😢 .

[xhebox]

Any new progress? I can help, I am on a native musl host.

[YangKeao]

@xhebox Really thanks for your help! It would be appreciated to submit a PR and make it work with musl. If you need any help on pprof-rs, feel free to contact me (under #41, or through email).

There is no new progress for this PR 😭 . I have tried to modify symbolic-demangle and make it compiled under musl. However, as shown before, it works not well. Once your commits arrive, I would close this one.

[xhebox]

Oh, the flame graph? Maybe there is a workaround.. But maybe not, I will look into this and ask the author of musl-libc for some help.

The problem is that it is blocking my compilation of tikv. I do not really need a well working pprof on musl. Backtracing never works well on musl... Maybe could, somehow, first pass the build of tikv.

[YangKeao]

@xhebox Well. It would be better to use conditional compilation and target specified dependency to avoid building pprof-rs on musl.

[bohutang]

@YangKeao

Hello, are there any plans to restart this pr?

[fredr]

I ended up here after getting empty profiles from our services built with musl. I wasn't sure what the status was, are we still waiting for something to be released in #41, or do we know what is not working with musl?