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[eMTee <2028276@xxxxxxxxxxxxxxxxxx>]

[09:24:34] <eMTee> https://sourceforge.net/p/mingw-w64/mailman/message/36804945/ "* __FORTIFY_SOURCE support "
[09:40:16] <eMTee> https://github.com/StephanTLavavej/mingw-distro/issues/71 ,  https://github.com/msys2/MINGW-packages/issues/5803  
[11:39:11] <eMTee> meh, it's not because of these. I tried         '-fstack-check=no',        '-fno-stack-check',        '-fno-stack-protector',        '-fno-stack-clash-protection',        '-D_FORTIFY_SOURCE=0' , still errors

[14:16:20] <eMTee> managed to compile it by adding 'BufferOverflowU' lib from the SDK. Altough some fix it by using dummy defines like https://github.com/kfrlib/fft-benchmark/blob/master/mingw_fix.h
I tried 

extern "C" {
   int __security_cookie;
}

with no luck, not sure if I added it to the proper place though.

[14:17:37] <eMTee> I still want to know what option to disable or what was enabled vs. the old 8.1 build we've been using but I'm at a loss how to find it out what it is. 
[14:18:39] <eMTee> Nevertheless these checks should make the app more safe, not sure to what extent though since it's a 20 year old technology/practice.

Will try a similar winlibs built compiler which reportedly don't exhibit
this issue with its defaults.


** Bug watch added: github.com/StephanTLavavej/mingw-distro/issues #71
   https://github.com/StephanTLavavej/mingw-distro/issues/71

** Bug watch added: github.com/msys2/MINGW-packages/issues #5803
   https://github.com/msys2/MINGW-packages/issues/5803

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https://bugs.launchpad.net/bugs/2028276

Title:
  gcc linker error: undefined reference to `__security_cookie' when
  building with gcc 8.5.0 based MinGW-w64 release

Status in DC++:
  New

Bug description:
  Trying to build DC++ with https://github.com/niXman/mingw-builds-
  binaries/releases/tag/8.5.0-rt_v10-rev0 , win32, seh.

  Got multiple " undefined reference to `__security_cookie'" errors when
  linking the HTMLHelp lib. This is a new issue, does not happen with a
  gcc 8.1 based compiler.

  https://stackoverflow.com/questions/21627607/gcc-linker-error-
  undefined-reference-to-security-cookie probably tells the cause (link
  to MS docs is broken, originally
  <https://web.archive.org/web/20070121194753/http://support.microsoft.com/?id=894573>)

  It says you either need to link bufferoverflowU.lib or build without
  the /GS switch.

  <https://stackoverflow.com/questions/57361083/gcc-equivalent-of-gs-gl-
  gy-oi-md-in-msvc> says "/GS is roughly equivalent to -fstack-
  protector-strong -fstack-clash-protection -D_FORTIFY_SOURCE=2. It also
  requires optimization (e.g., -O2 or -O3)" yet the error still happens
  even when building debug in which case all optimizations should be
  disabled.

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