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Re: GCC 7.3.0 -std=gnu++17 failed to getline() from std::ifstream




Christian Franke wrote:
Marco Atzeri wrote:
On 6/12/2018 7:11 PM, Christian Franke wrote:
...
The attached patch for
/usr/lib/gcc/*-pc-cygwin/7.3.0/include/c++/bits/basic_string.h
fixes this.


Please forget this patch. It was bases on a wrong assumption and only cures symptoms.



It seems an upstream bug so could you report it there ?


Done:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86138


If build with -std=c++17, a duplicate _S_empty_rep_storage[] which already exists in the DLL is generated in the executable. This results in a false negative string.empty() test in the DLL. See:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86138#c6

Workarounds:
- Link with -static, or
- Compile with -D_GLIBCXX_USE_CXX11_ABI

Fix:
https://gcc.gnu.org/viewcvs/gcc?view=revision&revision=261873

Regards,
Christian


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