Support for Mac OS X 10.4

[plicease]

error:
https://gist.github.com/plicease/976f953c14c40b0aa2505220cc1e96ed
work around:
https://gist.github.com/plicease/8f9ab734f41227fff8b76e86f1e6cdc9

[plicease]

Then once Test2::Tools::FFI is installed:

figment% make test
"/Users/ollisg/opt/perl/5.34.0/bin/perl" -MFFI::Build::MM=cmd -e fbx_build
"/Users/ollisg/opt/perl/5.34.0/bin/perl" -MFFI::Build::MM=cmd -e fbx_test
+env MACOSX_DEPLOYMENT_TARGET=10.3 cc -L/Users/ollisg/opt/perl/5.34.0/lib/site_perl/5.34.0/darwin-2level/auto/share/dist/Test2-Tools-FFI/lib -dynamiclib -undefined dynamic_lookup -L/opt/local/lib -fstack-protector t/ffi/_build/absolute-path.c.o t/ffi/_build/argless.c.o t/ffi/_build/callbacks.c.o t/ffi/_build/null.c.o t/ffi/_build/opaque.c.o t/ffi/_build/overload.c.o t/ffi/_build/pointers.c.o t/ffi/_build/simple-args.c.o t/ffi/_build/simple-returns.c.o t/ffi/_build/struct.c.o -Wl,-rpath,/Users/ollisg/opt/perl/5.34.0/lib/site_perl/5.34.0/darwin-2level/auto/share/dist/Test2-Tools-FFI/lib -lt2t -install_name @rpath/t/ffi/_build/libtest.dylib -o t/ffi/_build/libtest.dylib
ld: -rpath can only be used when targeting Mac OS X 10.5 or later
collect2: ld returned 1 exit status
error building t/ffi/_build/libtest.dylib from t/ffi/_build/absolute-path.c.o t/ffi/_build/argless.c.o t/ffi/_build/callbacks.c.o t/ffi/_build/null.c.o t/ffi/_build/opaque.c.o t/ffi/_build/overload.c.o t/ffi/_build/pointers.c.o t/ffi/_build/simple-args.c.o t/ffi/_build/simple-returns.c.o t/ffi/_build/struct.c.o at /Users/ollisg/opt/perl/5.34.0/lib/site_perl/5.34.0/darwin-2level/FFI/Build.pm line 269.
make: *** [fbx_test] Error 1