Hello,

I've encountered an error with Rcpp on Mac OS X (14.3.1, with the latest version of Xcode tools installed). Here is a reproducible example:

R version 4.3.3 (2024-02-29) -- "Angel Food Cake"
Copyright (C) 2024 The R Foundation for Statistical Computing
Platform: aarch64-apple-darwin20 (64-bit)

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> setwd('/Users/rbradley')

> library (Rcpp)

library (Rcpp)

> sourceCpp ("bug.cpp")

sourceCpp ("bug.cpp")
using C++ compiler: 'Apple clang version 15.0.0 (clang-1500.3.9.4)'
using SDK: 'MacOSX14.4.sdk'
clang++ -arch arm64 -std=gnu++17 -I"/Library/Frameworks/R.framework/Resources/include" -DNDEBUG   -I"/Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/library/Rcpp/include" -I"/Users/rbradley" -I/opt/R/arm64/include    -fPIC  -mtune=core2  -O0  -g   -c bug.cpp -o bug.o
clang: error: unsupported argument 'core2' to option '-mtune='
make: *** [bug.o] Error 1
Error in sourceCpp("bug.cpp") : Error 1 occurred building shared library.
> sessionInfo()

sessionInfo()
R version 4.3.3 (2024-02-29)
Platform: aarch64-apple-darwin20 (64-bit)
Running under: macOS Sonoma 14.3.1

Matrix products: default
BLAS:   /Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/lib/libRblas.0.dylib 
LAPACK: /Library/Frameworks/R.framework/Versions/4.3-arm64/Resources/lib/libRlapack.dylib;  LAPACK version 3.11.0

locale:
[1] en_US.UTF-8/en_US.UTF-8/en_US.UTF-8/C/en_US.UTF-8/en_US.UTF-8

time zone: America/Los_Angeles
tzcode source: internal

attached base packages:
[1] grDevices utils     datasets  stats     graphics  methods   base     

other attached packages:
[1] Rcpp_1.0.12    dplyr_1.1.4    tidyr_1.3.1    readr_2.1.5    tibble_3.2.1   magrittr_2.0.3

loaded via a namespace (and not attached):
 [1] utf8_1.2.4       R6_2.5.1         tidyselect_1.2.0 tzdb_0.4.0       glue_1.7.0       pkgconfig_2.0.3  generics_0.1.3   lifecycle_1.0.4  cli_3.6.2        fansi_1.0.6     
[11] vctrs_0.6.5      compiler_4.3.3   tools_4.3.3      purrr_1.0.2      hms_1.1.3        pillar_1.9.0     rlang_1.1.3

The contents of the example file bug.cpp are:

#include <Rcpp.h>

using namespace Rcpp;

1;

I would be grateful for any help! I have used Rcpp extensively in the past but not in approximately one year, so I'm unsure when this compilation problem appeared.

Thank you, Rob