[Rd] Optimization bug when byte compiling with gcc 5.3.0 on windows

Ray Donnelly rdonnelly at continuum.io
Mon Apr 4 03:44:21 CEST 2016


Apologies for breaking the threading on this, I've only just signed up to
the list and the last email was from September 2015.

I've started to look into building R for Windows using MSYS2 as both the
build environment and tools + libraries provider (where possible). I've
managed to get the testsuite to pass on a recent MSYS2 MinGW-w64 x86-64 GCC:
gcc.exe (Rev1, Built by MSYS2 project) 5.3.1 20160228

I've attached two patches that I needed, described below. I hope this is
the appropriate place and way to suggest patches. Comments for improvements
are very welcome.

Removes the __GNUC__ <= 4 for Windows ISNAN R_sqrt hack and doesn't replace
it with any version check since I don't see any reason to second-guess when
it might be fixed. When it is fixed in MinGW-w64 we can just remove the
hack and be happy (I would hope to be able to get round to this in the next
few months).

The reason that boxplot.stats() was crashing was because when isnan() is
called with an int it emits a UD2 instruction to force a crash, so let us
just cast the input value to a double to prevent that. The code for this
can be seen here:


Best regards,

Ray Donnelly,

Continuum Analytics Inc.

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