I've been using the iODBC framework (https://sourceforge.net/projects/iodbc/files/iodbc/3.52.16/iODBC-SDK-3.52.16-macOS11.dmg/download) for some time in a few Xcode Objective-C projects. Older projects work. Recent new projects fail to compile, with the following error: /Library/Frameworks/iODBC.framework/Headers/sqltypes.h:220:24 Typedef redefinition with different types ('unsigned long' vs 'UInt32' (aka 'unsigned int')) The definition in question, from iODBC/sqltypes.h, is: typedef unsigned long ULONG; The previous definition, from CoreFoundation/CFPluginCOM.h is: typedef UInt32 ULONG; Older projects open, compile and run normally in Xcode 15 and earlier. Only new projects created with Xcode 14 or 15 exhibit this behavior. CoreFondation/CFPluginCOM.h appears to provide non-essential Component Object Model (COM) support for Win32 apps. The definition of ULONG as UInt32 looks odd considering that CFPluginCOM seems to be aimed at 32-bit architecture. I find no way to mitigate this conflict within the Xcode project. Is there some way to exclude CFPluginCOM.h, which appears non-essential, from my project?