cflocal | launch CF apps , push and pull droplets | Continuous Deployment library

I am trying to build ITK on a mac with 10.12.6 Sierra. To install I followed the following procedure:

1. I cloned the source from the itk git and created a build directory.
2. Then I run cmake ../ITK from within the build directory, pointing to the ITK source directory, this works fine.
3. Then I run make from within the build directory

During this last step however I get the following error pointing to a header file in the Core Foundation Framework:

I am working on formatting user input as currency. I have a very basic view controller that contains two labels and a text field. The scene looks like this:

The leading label is intended to display currency symbols for currencies that contain the symbol before the value. The trailing label is intended to display currency symbols for currencies that contain the symbol after the value. The text field expands and contracts horizontally to fit the entered text so that the trailing currency symbol is always pinned to the entered value. The text property of the unused label is set to nil so that it appears hidden.

So far, everything works as expected. When setting the scheme's locale to use different currency formats, the labels are populated correctly. I am detecting the position of the currency symbol in the following code:

In Objective C, one can create a CFLocale as follows (taken from this post in 2012):

• CFLocaleRef myLocale = CFLocaleCopyCurrent() for the current locale; or:

• CFLocaleRef myLocale = CFLocaleCreate(kCFAllocatorDefault, CFSTR("ja")), for a target locale. The locale name comes from the rightmost column of the ISO 639-1/639-2 table, which Apple specifies as their standard for language codes here.*

*Note: very old code examples refer to long language codes like 'Japanese', as may be expected by versions of Mac OS X older than 10.4.

How does one create a CFLocale in Swift 3, as the API appears to have changed in several ways?