[Regression] libunwind.8 linker error at launching any new compiled binary

[leha-bot]

Problem description
After some updates any new generated binaries will not launch, faling with linker error.

Steps to reproduce

1. Compile any C/C++ program with clang/clang++, e.g.

int main() {}

2. compile with clang/clang++:
   clang++ main.cpp

3. Launch resulted a.out:
   a.out

4. Got this text:

CANNOT LINK EXECUTABLE DEPENDENCIES: cannot locate symbol "dl_iterate_phdr" referenced by "libunwind.so.8"...

Expected behavior
Working applcatiob

Additional information
Post output of command termux-info:

Updatable packages:
All packages up to date
System information:
Linux localhost 3.10.33-g678969f #1 SMP PREEMPT Mon Aug 24 10:37:00 PDT 2015 armv7l Android
Termux-packages arch:
arm
Android version:
5.1.1
Device manufacturer:
NVIDIA
Device model:
SHIELD Tablet

[ghost]

Cannot reproduce on Android 6 ARM. Maybe something Android 5-specific.

[leha-bot]

Seems that new compiler adds news unwind exports which doesn't available in libunwind.so.8

[ghost]

Looks like you have libunwind package installed.
Without this package clang++ works as it should.

[leha-bot]

Seems that ~/../lib/libunwind.8.so contains this symbol (dl_iterate_phdr), but it's unresolved:
https://gist.github.com/leha-bot/3658551a142ac7a62730008928f5a1c0

[its-pointless]

We should move to llvm unwind for all archs but arm Or not even have it...

[leha-bot]

Looks like you have libunwind package installed.
Without this package clang++ works as it should.

Yes, it presents in system. But it's weird that it worked before update o_o

[leha-bot]

Seems that libunwind-arm doesn't have resolved symbol as libunwind.so.8: https://gist.github.com/leha-bot/13387e4ac599d545b78f790bb92a211b

I also found an interesting LLVM issue related to this problem: https://reviews.llvm.org/D39468

But Android 5.1.1 API_LEVEL is 22

[ghost]

Closing since libunwind is no longer shipped as package.