I've updated to C++Builder 13.1 a couple of weeks ago. I will do a comprehensive test in a few days. Also I've updated my subscription, so I will be able to support C++/ARM/Windows with OWLNext when the new compiler will be available.
For me, switching LARGE projects to another language, even with IA aid, it's technically and economically impractical. Even switching from 'classic C++' to 'modern c++' requires work. Moreover, after you move to another framework/language using IA you have to audit that conversion. I've have used VCL and FMX in small applications, they are technically very good, but you'll depend on Borland/Embarcadero compilers. QT and wxWidgets are more open. wxWidgets was also recommended by the same Borland as...
Support for the Clang-based Embarcadero compilers
Update on Win64+UNICODE: Currently OWLMaker dont allow to build the UNICODE versions of OWLNext, OCFnext and other in Win64+UNICODE for C++Builder compilers (c++Builder clang) Using C:\OWL644\source\owlcore\CBXE3\owl.cbproj I've builded both Debug and Release version of OWLNext Win64+UNICODE. I've used C++Builder 10.x (10.1 actually). I've renamed them using the owlnext file name convention: https://sourceforge.net/p/owlnext/wiki/OWLNext_naming_convention/ Then I've opened small and medium projects...
And finally, I've builded CoolProj 6.44.28 with all these variations with C++Builder13 'Florence'; - Win32/Win64 - Debug/Release - ANSI/UNICODE - static. So we can move to have an updated version of OWLMaker.
Same for OWLext 6.44.28, I've builded successfully the variations: - Win32/Win64 - Debug/Release - ANSI/UNICODE - static. I've used 'branches/6.44/source/owlext/CBXE3/owlext.cbproj' project file to do it.
With current state [r8559] I've builded the following variations of OCFNext 6.44.28 with C++Builder 13/Florence. : - Win32/Win64 - Debug/Release - ANSI/UNICODE - static I've used 'branches/6.44/source/ocf/CBXE3/ocf.cbproj' project file to do it.
It has sense. OWL 6.4x it's in support mode, so no need to support the newest ISO standard. I will make more test (ocf, coolproj, owlext) to ensure all it's ready. I will also make tests with bracnh/owl7 source code.