[Development] iOS, libpcre16, QString::trimmed_helper()

[Tim Blechmann]

>> I'm attempting to use libQt5Core with self compiled qt5.5 snapshot,
>> which is a couple of weeks old.   The link fails, complaining about
>> missing libpcre16.
>> I believe that is not standard on iOS, at least it does not come up when
>> looking for "Other Libs" pcre in XCode.   There does seem to be some
>> version of libpcre for OSX.
> 
> libpcre is bundled with Qt. Can you check your config.summary for what it 
> decided to do for PCRE?

it is bundled, but not necessarily linked automatically. e.g. qt's cmake
integration lacks the usage requirement for libpcre (compare QTBUG-38913)

tim