skip dependencies based on triplet

[elcombs]

I have a question that is similar to issue 30497. I want to be able to skip a port depending on a triplet. Here is my use case.

I am building python3 in manifest mode. This all works great when I build for Windows or Linux using native compilers. However, it fails when cross compiling on Linux. It fails when cross compiling because the port called gettext-libintl returns the error,

-- libintl header: LIBINTL_H-NOTFOUND

The problem seems to be that the gettext-libintl portfile.cmake uses find_package(Intl) which does not find the include file when cross compiling even though libintl.h is in the /usr/aarch64-linux-gnu/include directory. The only thing the gettext-libintl port seems to do on Linux is confirm that the libintl.h exists. Since I know that the libintl.h file exists, I would like to skip this port when I run on Linux or more specifically when I run using my cross compile triplet.

I know I can solve this issue using overlay ports. I don't want to really create an overlay for python3, but creating an overlay for gettext-libintl would not be too bad. I'd just like to avoid creating any overlay ports. Any ideas would be appreciated.

Thanks.