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-D_GLIBCXX_USE_CXX11_ABI=0 cflags?

See original GitHub issue

Hi, I wonder how to set -D_GLIBCXX_USE_CXX11_ABI=1 when building apex. I got this error when using syncbn:

Warning:  using Python fallback for SyncBatchNorm, possibly because apex was installed without --cuda_ext.  The exception raised when attempting t
o import the cuda backend was:  /usr/lib/python3.7/site-packages/syncbn.cpython-37m-x86_64-linux-gnu.so: undefined symbol: _ZN3c105ErrorC1ENS_14So
urceLocationERKSs

and then I got:

$ c++filt _ZN3c105ErrorC1ENS_14SourceLocationERKSs
c10::Error::Error(c10::SourceLocation, std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)

It is said related to -D_GLIBCXX_USE_CXX11_ABI according to this post. Also, I check ABI by:

$ strings /usr/lib/python3.7/site-packages/torch/lib/libtorch.so|grep ABI
CXXABI_1.3.8
CXXABI_1.3.5
CXXABI_1.3.7
CXXABI_1.3.3
CXXABI_1.3

$ strings /usr/lib/python3.7/site-packages/syncbn.cpython-37m-x86_64-linux-gnu.so|grep ABI
CXXABI_1.3
CXXABI_1.3.3
CXXABI_1.3.5

A solution to this is compile apex with -D_GLIBCXX_USE_CXX11_ABI=1. So, how could I do that?

Issue Analytics

State:
Created 5 years ago
Comments:7 (2 by maintainers)

Top GitHub Comments

1reaction

leomaocommented, Apr 12, 2019

https://github.com/pytorch/pytorch/commit/e0c593eae7679fbf9e08d933f695ba9781b24da2

So the problem is that pytorch is compiled from source but the version string is set binary-formatted manually in the PKGBUILD. This issue is resolved in the commit above (3 days ago) but not in the pytorch v1.0.1.

I compiled pytorch master from source with cuda/intel-mkl and compiled apex with it. I can verify the problem does not exist for pytorch master.

1reaction

j6ecommented, Mar 29, 2019

@mcarilli So in order for apex to build and function I first need to build pytorch with D_GLIBCXX_USE_CXX11_ABI=1 instead of the 0 in the spots you mentioned?

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