tree 35a06ee9baded35e32a053cf56922ae89edd21a4
parent 79098d23eb2ac54ad8c47e27cdb614d73a64282c
author Gregor Jasny <gjasny@googlemail.com> 1596890049 +0200
committer Gregor Jasny <gjasny@googlemail.com> 1596892932 +0200

CMakeIOSInstallCombined: Enforce disjoint architecture sets

Starting with Xcode 12 the arm64 architecture is supported
as an iOS device as well as simulator architecture.

But the fat macho file format does not distinguish by SDK,
only by architecture. That makes lipo (rightfully) complain
that it cannot add both architectures to a single file.

To work around we make sure that both SDKs are built for a
disjoint set of architectures. If an architecture is present
for both SDKs we prefer the currently configured one.

The log output has been extended to reflect that:

```
[iOS combined] Architectures (iphoneos): arm64 arm64e armv7 armv7s
[iOS combined] Architectures (iphonesimulator): arm64 arm64e i386 x86_64
[iOS combined] Architectures (iphonesimulator) after pruning: i386 x86_64
```