Setting MACOSX_DEPLOYMENT_TARGET

[mudge]

In the most recent of re2, I need to target macOS 10.14 due to compilation errors from Abseil such as the following:

error: 'visit<BufferSizeVisitor, std::__1::variant<std::__1::variant<unsigned long long, long long, unsigned int, int, bool>, std::__1::variant<unsigned long long, long long, double>, absl::lts_20250814::Span<const char>, std::__1::variant<unsigned int, int, float> > &>' is unavailable: introduced in macOS 10.14

MACOSX_DEPLOYMENT_TARGET is currently hardcoded to 10.13 in

rake-compiler-dock/build/mk_osxcross.sh

Line 28 in cc84689

echo "export MACOSX_DEPLOYMENT_TARGET=10.13" >> /etc/rubybashrc

I’m overriding it by explicitly setting it to 10.14 in my extconf.rb but is there a more “blessed” way to achieve this?