mac objective C++, @import not working?

[davecotter]

1: must i name an objective C++ file with .mm extension? i can name it with .cpp in xcode and just tell xcode what compiler to use for that file, and it works. in my pro file i added the .cpp file to OBJECTIVE_SOURCES but that didn't seem to help?

2: when i have @import <some framework>, i get this error:

error: use of '@import' when C++ modules are disabled, consider using -fmodules and -fcxx-modules

so i add this to my PRO file:

QMAKE_CXXFLAGS += -fcxx-modules

and now i see this in my compiler output:

clang: warning: argument unused during compilation: '-fcxx-modules'

what am i missing here?

[davecotter]

buried in some obscure forum, apparently the correct method is

for an objectiveC++ framework, you can't add the path this way:

QMAKE_LFLAGS += -F$${DIR_PADDLE_FRAMEWORK}

you have to add it this way:

QMAKE_OBJECTIVE_CFLAGS += -F$${DIR_PADDLE_FRAMEWORK}

Then it will somehow @import

[kenchan]

@davecotter
Hi, I use the .mm extension and #include instead of @import.
I put the path to .mm source file in the OBJECTIVE_SOURCES section of the pro file and it all seems to work fine.

[davecotter]

I've tried all these and none work:

//@#import <Paddle/Paddle.h>
//#include <Paddle.framework/Headers/Paddle.h>
//#import <Paddle/Paddle.h>
//#import <Paddle>
//@import Paddle
#include <Paddle/Paddle.h>

and yes the folder that contains the framework is in my includes path, and the framework is also added in the pro file

DIR_PADDLE_FRAMEWORK	= $${DIR_EXTERNAL}Paddle/Mac/framework.4.0.11/
QMAKE_LFLAGS += -F$${DIR_PADDLE_FRAMEWORK}
LIBS += -framework Paddle
INCLUDEPATH += $${DIR_PADDLE_FRAMEWORK}

but really, i want to know how i can use @import

[davecotter]

i'm praying that someone who uses objC++ in QT with "modules" can chime in here? pretty please?

[davecotter]

buried in some obscure forum, apparently the correct method is

for an objectiveC++ framework, you can't add the path this way:

QMAKE_LFLAGS += -F$${DIR_PADDLE_FRAMEWORK}

you have to add it this way:

QMAKE_OBJECTIVE_CFLAGS += -F$${DIR_PADDLE_FRAMEWORK}

Then it will somehow @import