warning: overriding '-mmacosx-version-min=10.14' option

[kinke]

On Saturday, 11 January 2020 at 11:15:52 UTC, Jacob Carlborg 
wrote:
> I get warnings like this:
>
> clang: warning: overriding '-mmacosx-version-min=10.14' option 
> with '--target=arm64-apple-ios12.0' [-Woverriding-t-option]
>
> Looking at the `build.ninja` file that is generated there are 
> 72 targets (or whatever they're called) that contains the 
> following:
>
> FLAGS = -DHAVE_UNISTD_H -isysroot $MAC_OSX_SDK_PATH 
> -mmacosx-version-min=10.14   -target arm64-apple-ios12.0 
> -isysroot $IOS_SDK_PATH
>
> (I've replaced the actual SDK paths with $MAC_OSX_SDK_PATH and 
> $IOS_SDK_PATH to reduce the text).

Without specifying a C cross-compiler directly, either via 
setting the CC env variable or by using a CMake toolchain file, 
CMake will probe and configure the compiler for the host.

There are probably guides for how to set up CMake 
cross-compilation from macOS to iOS. There might even be some 
builtin CMake support in the meantime: 
https://gitlab.kitware.com/cmake/cmake/issues/17870

> --cFlags='-target arm64-apple-ios12.0;-isysroot $IOS_SDK_PATH' \
> --linkerFlags='-target arm64-apple-ios12.0;-isysroot 
> $IOS_SDK_PATH' \

The spaces here should be replaced by semicolons.