[Bioc-devel] New Windows toolchain

Dan Tenenbaum dtenenba at fredhutch.org
Fri Mar 13 01:15:32 CET 2015

A quick update: Sounds like there is a strong possibility that the toolchain will be rolled back to use the older gcc and avoid all these issues.

Alternatively, some of the issues may be fixed in the next few days.

So, please do NOT make any changes to your packages in response to these issues because you might just have to roll them back.

For tonight's build we will use the new toolchain in order to gather data about what breaks and what doesn't, but after that we may switch back, depending on the extent of damage and on what CRAN decides to do. We'll keep you posted.


----- Original Message -----
> From: "Dan Tenenbaum" <dtenenba at fredhutch.org>
> To: "bioc-devel" <bioc-devel at r-project.org>
> Sent: Thursday, March 12, 2015 4:06:27 PM
> Subject: New Windows toolchain
> Hi all,
> This is relevant (and possibly quite important) to all package
> maintainers whose packages contain C or C++ code, or depend on one
> that does.
> A new toolchain is available for building R and R packages on
> Windows. This toolchain uses gcc 4.9.2 whereas the old one used gcc
> 4.6.3.
> Another major difference is that gcc is no longer in the PATH; and
> the flags -m32 and -m64 can't be used to delegate to the appropriate
> compiler, so any Makefiles/Makevars/configure scripts that expect to
> find gcc/g++ on the PATH need to be changed.
> See https://stat.ethz.ch/pipermail/r-devel/2015-March/070800.html and
> other emails in that thread for more information.
> The new toolchain has been installed on the bioc-devel build machine
> for Windows, SO...it's possible that this could wreak a little havoc
> on our build system (just on windows) tomorrow. The main point of
> this email is to say not to worry, we'll figure these things out. If
> your package suddenly fails to build tomorrow, it's likely related
> to this change. We'll post updates as we figure out what package
> maintainers need to do to get things working again.
> For those who develop on windows, grab the latest R-devel and the
> latest Rtools in order to be on the same page as the build system.
> Let us know if you have questions.
> Dan

More information about the Bioc-devel mailing list