Dear CRAN maintainers, (I am writing to this list since I guess you read it anyway, and there isn't any "contact information" at the R Mac Builder site.) The Mac Builder service does not seem to compile even a basic Rcpp package anymore, see here: https://mac.r-project.org/macbuilder/results/1767974115-2b3446b6016a0ee3/ #include <cmath> is not found, same for #include <iostream>. Some help on this issue would be greatly appreciated. Best wishes, Matthias
[R-pkg-devel] R mac builder, c++
3 messages · Matthias Gondan, Uwe Ligges, Simon Urbanek
On 09.01.2026 17:18, Matthias Gondan wrote:
Dear CRAN maintainers, (I am writing to this list since I guess you read it anyway, and there isn't any "contact information" at the R Mac Builder site.) The Mac Builder service does not seem to compile even a basic Rcpp package anymore, see here:
- A new Rcpp version is currently under reverse dependency checks on CRAN. - In general report issues with the macbuilder service to its maintainer, Simon Urbanek. Best, Uwe Ligges
https://mac.r-project.org/macbuilder/results/1767974115-2b3446b6016a0ee3/ #include <cmath> is not found, same for #include <iostream>. Some help on this issue would be greatly appreciated. Best wishes, Matthias [[alternative HTML version deleted]]
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Matthias, thanks, now fixed: https://mac.r-project.org/macbuilder/results/1767996503-3a8243f5318cf480/ It's the old Xcode update bug which can be fixed with sudo rm -rf /Library/Developer/CommandLineTools/usr/include/c++ Cheers, Simon PS: contact info is on the main page (=me, preferred) or R-SIG-Mac.
On 10/01/2026, at 05:18, Matthias Gondan <matthias-gondan at gmx.de> wrote: Dear CRAN maintainers, (I am writing to this list since I guess you read it anyway, and there isn't any "contact information" at the R Mac Builder site.) The Mac Builder service does not seem to compile even a basic Rcpp package anymore, see here: https://mac.r-project.org/macbuilder/results/1767974115-2b3446b6016a0ee3/ #include <cmath> is not found, same for #include <iostream>. Some help on this issue would be greatly appreciated. Best wishes, Matthias [[alternative HTML version deleted]]
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