Re: Unable to compile Cocoa/Objective-C program to C++
Re: Unable to compile Cocoa/Objective-C program to C++
- Subject: Re: Unable to compile Cocoa/Objective-C program to C++
- From: Paul Johnson <email@hidden>
- Date: Sun, 12 May 2013 12:06:53 -0500
I am able to compile my one Objective-C++ file as Objective-C++. (I
selected the Build Phases tab for the project I expanded the Compile
Sources section and on the line for the Objective-C++ file I added in
the Compiler Flags column: '-x objective-c++'.
When I do this, this compiler is called twice, one to compile the
Objective-C file and one to compile the Objective-C++ file.
I'm still getting a fatal compile error in one of the header files
#included in the 3rd party software though.
(If I compile the Objective-C++ file, by a calling clang in Terminal,
I can compile the Objective-C++ file with just one warning message, so
I'm definitely getting closer to solving this problem.)
On Sun, May 12, 2013 at 11:03 AM, Paul Johnson <email@hidden> wrote:
> In my Cocoa/Objective-C program I'm trying to access 3rd party
> software written in C++.
>
> I'm trying to use Objective-C++ to accomplish this but it appears that
> Xcode is not recognizing the file where I call the C++ as having been
> written in Objective-C++. (The long compiler command contains '-x
> objective-c'.) I've renamed the file to give it a .mm extension, which
> is the extension used for Objective-C++ files, and I've also set the
> File Type to 'Default- Objective-C++' in the Identity and Type section
> of the File Inspector. I also removed the Objective-C++ file from my
> project and reinserted it.)
>
> I #include one header from the 3rd party software and have one line
> that calls the software to instantiate a C++ object there. This header
> file references other header files and one of them has the line
> '#include <string>'. The compiler complains that it can't find the
> file 'string'.
>
> I used the 'locate' command in Terminal to find the 'string' file, and
> found two occurrences, one at /usr/include/c++/4.2.1/string and
> another at /usr/lib/c++/v1/string.
>
> I've tried adding /usr/include/c++/4.2.1 to the HEADER_SEARCH_PATHS in
> Xcode but get lots of additional compile errors.
>
> Can someone help me with this issue with calling C++?
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