Testing fails on macOS 12: ld: dynamic main executables must link with libSystem.dylib for architecture x86_64

[ryandesign (Ryan Carsten Schmidt)]

Testing base fails on macOS 12:

===> making test in src/machista1.0
clang -dynamiclib -g -O2 -std=c99 -Wextra -Wall -pedantic  -fPIC  -Wl,-single_module \
		$(if [ 20 -lt 10 ]; then echo "-arch i386 -arch ppc"; elif [ 20 -lt 20 ]; then echo "-arch x86_64 -arch i386"; else echo "-arch x86_64 -arch arm64"; fi) \
		-nostdlib \
		-install_name tests/libmachista-test-dependency.dylib \
		tests/empty.c \
		-o tests/libmachista-test-dependency.dylib
ld: dynamic main executables must link with libSystem.dylib for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [tests/libmachista-test-dependency.dylib] Error 1
make[1]: *** [test] Error 1
make: *** [test] Error 1

[ryandesign (Ryan Carsten Schmidt)]

We only see this on macOS 12, both ​on arm64 and ​on x86_64.

[jmroot (Joshua Root)]

[eb20cf80840f9af2d57905138bee1c9c2fa1bcc7/macports-base]