CODEWITHSUNDEEP
c++objective-cxcodebuild
krb
krb

Reputation: 16345

Build fails when including C++ files

I have an XCode project (Objective-C) to which I'm trying to add a C++ library I've coded earlier. As soon as I add a single .cpp or .mm file, the build process will trip up on random things, usually when building the prefix header. The same thing happens when I include .c files. Basically, I can only use .m files in my target. The last error I've got was:

SDKpath/public/CoreGraphics.framework/Headers/CGFont.h:53:

error: expected constructor, destructor, or type conversion before ';' token

The code at that line being:

CG_EXTERN CGFontGetGlyphsForUnichars(CGFontRef font, void* chars, CGGlyph* glyphs, int len)
CG_AVAILABLE_STARTING(__MAC_10_2, __IPHONE_2_0);

I'm pretty sure that the code isn't what caused that issue, but I can't figure out what is wrong with my build settings. If I get rid of that include, then the build process will trip on the first bit of Objective-C code it gets to.

This is my prefix header:

#ifdef __OBJC__
#import <Foundation/Foundation.h>
#import <CoreGraphics/CoreGraphics.h>
#import <IOSurface/IOSurfaceAPI.h>
#import "CGColorUtil.h"
#endif

Upvotes: 1

Views: 343

Answers (2)

krb
krb

Reputation: 16345

I'm an idiot. For some reason the return type was missing from the function.

CG_EXTERN void CGFontGetGlyphsForUnichars(CGFontRef font, void* chars, CGGlyph* glyphs, int len)
CG_AVAILABLE_STARTING(__MAC_10_2, __IPHONE_2_0);

Upvotes: 1

Charles
Charles

Reputation: 2661

You need to set the compile target as Objective-C++ or change the file extension to .mm of your C/C++ code files. Same thing for an entire library.

I'm also pretty sure that the compiler always defines the OBJC macro, so if you don't want to include that code you need to find a different way to hide it from the compiler.

Upvotes: 0

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