Add support for static frameworks / XCFramework in create-frameworks.sh

[johnhammerlund]

The problem: create-frameworks.sh is limited to producing dynamic libraries. In use cases that make sense, static linking can lead to better optimization.

This adds a simple flag to create-frameworks.sh, -s, which overrides the mach-o format to instead be a static library. The resulting output frameworks, along with the final XCFramework, are produced as static libraries instead of dynamic libraries. Since the existing OpenSSL.framework is already just a simple repackaging of the libcrypto and libssl libraries, I don't believe that anything else needs to be touched.

Examples:

./scripts/create-frameworks.sh # Builds dynamic frameworks / dynamic XCFramework, as usual
./scripts/create-frameworks.sh -s # Builds static frameworks / static XCFramework

No worries if you'd prefer a different approach, or if this isn't in the scope of this project.

[richardtop]

Interested in having this feature!

[krzyzanowskim]

thank you!