Perhaps same as https://stat.ethz.ch/pipermail/r-sig-mac/2024-September/015042.html Try this: sudo rm -rf /Library/Developer/CommandLineTools/usr/include/c++
On Fri, Aug 29, 2025 at 8:09?PM Lee Hsiang Liow <l.h.liow at nhm.uio.no> wrote:
New to the list.
Got a new laptop, running OS 15.5 Sequoia.
R version 4.5.1 (2025-06-13) -- "Great Square Root"
Have new Xcode, new gofortran
Trying to install an R package that runs C++, have the R dependencies, the error in installation is:
** using staged installation
** libs
using C++ compiler: ?Apple clang version 16.0.0 (clang-1600.0.26.6)?
using SDK: ?MacOSX15.2.sdk?
[??. Removing some non relevant info??]
fatal error: 'cmath' file not found
37 | #include <cmath>
| ^~~~~~~
1 error generated.
Can any one advise? Thank you!
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