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Close #442
Problem
On macOS, downstream packages get this linker warning during
R CMD check:unwind_protect_wrapper.ois compiled by thecccrate in savvy'sbuild.rs. WhenMACOSX_DEPLOYMENT_TARGETis unset,ccfalls back toxcrun --show-sdk-version(e.g. 26.2), which mismatches R's deployment target (e.g. 15.0).So far, downstream packages have worked around this in their own
configurescript (cf. yutannihilation/string2path#202, yutannihilation/string2path#208). It would be nicer to fix it once in savvy itself.Fix
Propagate
MACOSX_DEPLOYMENT_TARGETjust the same as yutannihilation/string2path#208 does