[swift-users] Serious Issue with Project Preprocessor Build Setting, Xcode 7.3 and Swift.

[Daniel Dunbar]

To follow on to what Joe said, can you provide more info about the exact problem. Is this a C preprocessor definition that you expect to be available in code imported by the Clang importer (i.e., bridging header files, etc.), or is a a macro you are expecting to use within Swift itself? And please let us know exactly which build setting you are referring to.

Thanks,
 - Daniel

> On Mar 23, 2016, at 3:59 PM, Joe Groff via swift-users <swift-users at swift.org> wrote:
> 
> 
>> On Mar 23, 2016, at 9:43 AM, James Campbell via swift-users <swift-users at swift.org> wrote:
>> 
>> We are experiencing an issue when compiling swift code under Xcode 7.3.
>> 
>> Preprocessor macros specified in the Xcode Project aren't imported into swift. Ones manually declared in code are imported fine.
>> 
>> Specifying Xcode 7.3 to use the Xcode 7.2 toolchain (Swift 2.1 etc) has no effect on this.
>> 
>> This is preventing us from using Xcode 7.3 and being able to test for 9.3. Anybody else getting this issue?
> 
> The Swift and C family build settings in Xcode are distinct. Are you sure you set the -D flags in "Other Swift Flags" and not in the C build settings? Swift doesn't have preprocessor macros.
> 
> -Joe
> 
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