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From: Tony Kelman <tony AT kelman DOT net>
To: "cygwin AT cygwin DOT com" <cygwin AT cygwin DOT com>
Subject: Re: [ANNOUNCEMENT] Updated: mingw64-*-gcc-5.4.0-1 (x86/x86_64) (Testing)
Date: Sat, 6 Aug 2016 06:58:03 +0000
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Have you backported the patch for GCC bug 66655 here? I was expecting
this to miscompile LLVM and cause test failures when building the Julia
language, as I've seen for all other GCC 5.x versions on mingw targets.
The fix was https://gcc.gnu.org/viewcvs/gcc/trunk/gcc/config/i386/winnt.c?r1=232828&r2=232827&pathrev=232828
which is only on gcc 6, it has not been applied to the gcc-5 branch
https://gcc.gnu.org/viewcvs/gcc/branches/gcc-5-branch/gcc/config/i386/winnt.c?view=log

I was expecting the following to fail, but surprisingly it seems okay.
(It's large and would take an hour or more for you to reproduce this,
probably no need since it's working so far):

# check build prereqs
curl --version
patch --version
python --version
g++ --version
m4 --version
cmake --version
7z -h
x86_64-w64-mingw32-gcc --version
x86_64-w64-mingw32-g++ --version
x86_64-w64-mingw32-gfortran --version
# end of build prereq checks
git clone https://github.com/JuliaLang/julia -b release-0.5
cd julia
mkdir -p usr/bin # I'll need to fix Julia's build system for libvtv
cp /usr/x86_64-w64-mingw32/sys-root/mingw/bin/libvtv-0.dll usr/bin
make -j8 test # defaults to cross-compile when build env is cygwin


-Tony


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