libstdc++ SDK 10.9 or 10.13

[efa]

the readme:
https://github.com/tpoechtrager/osxcross#deployment-target
say:
>= 10.9 also defaults to libc++ instead of libstdc++

while build.sh:
https://github.com/tpoechtrager/osxcross/blob/master/build.sh#L406
say:
Use <= 10.13 SDK if you rely on libstdc++ support

[efa]

also from readme:
https://github.com/tpoechtrager/osxcross#deployment-target
seems that default deployment target can be only:
SDK <= 10.13: macOS 10.6
SDK >= 10.14: macOS 10.9
but from current build.sh:
https://github.com/tpoechtrager/osxcross/blob/master/build.sh#L31
I saw can be:
SDK >= 14: macOS 10.13

While seems confirmed that last version that can build for 32 bit is:
SDK 10.13*) TARGET=darwin17

[HinTak]

FWIW, "default" means alternatives are available (but not the default). I don't really understand what's the issue. There is a "default", and there are "alternarives" different from the default if you set some options with command flags, etc.

[efa]

readme and build.sh report different default information.
For clarity it would be very helpful to align readme with the latest build.sh (if it is the most up to date)

[HinTak]

There is git history, likely readme is behind - the build script is authoritative. The readme probably means "you can get the non-defaults if you use a different branch, or go back in history and use an earlier version of this". I am still not sure what is the issue... you can expand the readme yourself if you think it is unclear/incorrect...

[efa]

about default deployment target I also think that build.sh is authoritative and you confirmed that.

About defaulting to libc++ instead of libstdc++, I think that readme is right and can be as issue in build.sh
https://github.com/tpoechtrager/osxcross/blob/master/build.sh#L406
Do you confirm that?