[SOLVED]Build fails due to preprocessor macro in "TargetConditionals.h" file

[Mr.Zeus]

May I first thank each and every member of the SFML Team and anyone who has contributed to the SFML project for you work. I LOVE SFML so much! It gives what may I call "simplistic control," the best kind. 

Now for some context:
I am working on a Pong extension named Pong++. I have set up a game engine/game state manager, and have coded a splash screen. But, when I build I am greeted by this error complaining about the

#if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR

line of "Config.hpp" file(line 54 to be exact). Here is the full error:

/usr/local/include/SFML/Config.hpp:54:9: error: invalid token at start of a preprocessor expression
    #if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
        ^
 

I am on MacOS(OS X as it was called at the time of release)version 1.9 (Mavericks), and have SFML 2.5.1 installed. I have not tried reinstalling SFML, but it seems to be an issue with my version of SFML, so if I do I will install the latest commit.

(I did try this in a file just importing the "Config.h" file by itself in a single file and still got an error.)

[eXpl0it3r]

Odd that nobody else has run into this.
This seems like a code error on our part. 

Try to change the SFML Config.hpp to #if defined(TARGET_OS_IPHONE) || defined(TARGET_IPHONE_SIMULATOR) and same a few lines down #elif defined(TARGET_OS_MAC).

Let me know if that helps, so we can fix it on master.

[Mr.Zeus]

Thanks; That worked. I a new to C++ and the whole preprocessor thing, sorry if it was obvious. I have worked with Python before and might check out the SFML bindings for it.  Have a nice day/night/evening/morning/afternoon!

EDIT: Was this the right category to post this question in? If not, whoops!

[Laurent]

According to the documentation inside that header, and various examples found for example on stackoverflow, the original code was right. These macros are always defined, it's their value that must be tested.

    TARGET_OS_*
    These conditionals specify in which Operating System the generated code will
    run. At most one of the these is true, the rest are false.

[eXpl0it3r]

Hmm interesting, but then I wonder, are the ones for iOS always required to exist? Like isn't there an option to install XCode or similar without iOS support?

Maybe we should move the macOS check up or check if defined first and only then check the value?

[Laurent]

All the versions of that file that I could find, always define all these macros (unconditionally).

Mr.Zeus, maybe you should investigate what happens in your specific environment, since you're the only one who gets this error. You can post the content of your TargetConditional.h header for example, or post a preprocessed version of Config.hpp.

[Mr.Zeus]

Here is my TargetConditionals.h file in full:

(click to show/hide)

/*
 * Copyright (c) 2000-2008 by Apple Inc.. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_LICENSE_HEADER_END@
 */
 
/*
     File:       TargetConditionals.h
 
     Contains:   Autoconfiguration of TARGET_ conditionals for Mac OS X and iPhone
     
                 Note:  TargetConditionals.h in 3.4 Universal Interfaces works
                        with all compilers.  This header only recognizes compilers
                        known to run on Mac OS X.
 
*/

#ifndef __TARGETCONDITIONALS__
#define __TARGETCONDITIONALS__
/****************************************************************************************************

    TARGET_CPU_*    
    These conditionals specify which microprocessor instruction set is being
    generated.  At most one of these is true, the rest are false.

        TARGET_CPU_PPC          - Compiler is generating PowerPC instructions for 32-bit mode
        TARGET_CPU_PPC64        - Compiler is generating PowerPC instructions for 64-bit mode
        TARGET_CPU_68K          - Compiler is generating 680x0 instructions
        TARGET_CPU_X86          - Compiler is generating x86 instructions
        TARGET_CPU_ARM          - Compiler is generating ARM instructions
        TARGET_CPU_MIPS         - Compiler is generating MIPS instructions
        TARGET_CPU_SPARC        - Compiler is generating Sparc instructions
        TARGET_CPU_ALPHA        - Compiler is generating Dec Alpha instructions


    TARGET_OS_*
    These conditionals specify in which Operating System the generated code will
    run. The MAC/WIN32/UNIX conditionals are mutually exclusive.  The EMBEDDED/IPHONE
        conditionals are variants of TARGET_OS_MAC.

        TARGET_OS_MAC           - Generate code will run under Mac OS
        TARGET_OS_WIN32         - Generate code will run under 32-bit Windows
        TARGET_OS_UNIX          - Generate code will run under some non Mac OS X unix
        TARGET_OS_EMBEDDED      - Generate code will run under an embedded OS variant
                                  of TARGET_OS_MAC
        TARGET_OS_IPHONE        - Generate code will run under iPhone OS which
                                  is a variant of TARGET_OS_MAC.

    TARGET_RT_*
    These conditionals specify in which runtime the generated code will
    run. This is needed when the OS and CPU support more than one runtime
    (e.g. Mac OS X supports CFM and mach-o).

        TARGET_RT_LITTLE_ENDIAN - Generated code uses little endian format for integers
        TARGET_RT_BIG_ENDIAN    - Generated code uses big endian format for integers    
        TARGET_RT_64_BIT        - Generated code uses 64-bit pointers    
        TARGET_RT_MAC_CFM       - TARGET_OS_MAC is true and CFM68K or PowerPC CFM (TVectors) are used
        TARGET_RT_MAC_MACHO     - TARGET_OS_MAC is true and Mach-O/dlyd runtime is used


    TARGET_IPHONE_SIMULATOR     - Generate code for running under iPhone Simulator
       

****************************************************************************************************/


/*
 *    gcc based compiler used on Mac OS X
 */
#if defined(__GNUC__) && ( defined(__APPLE_CPP__) || defined(__APPLE_CC__) || defined(__MACOS_CLASSIC__) )
    #define TARGET_OS_MAC               1
    #define TARGET_OS_WIN32             0
    #define TARGET_OS_UNIX              0
    #define TARGET_OS_EMBEDDED          @CONFIG_EMBEDDED@
    #define TARGET_OS_IPHONE            @CONFIG_IPHONE@
    #define TARGET_IPHONE_SIMULATOR     @CONFIG_IPHONE_SIMULATOR@
    #if defined(__ppc__)
        #define TARGET_CPU_PPC          1
        #define TARGET_CPU_PPC64        0
        #define TARGET_CPU_68K          0
        #define TARGET_CPU_X86          0
        #define TARGET_CPU_X86_64       0
        #define TARGET_CPU_ARM          0
        #define TARGET_CPU_MIPS         0
        #define TARGET_CPU_SPARC        0  
        #define TARGET_CPU_ALPHA        0
        #define TARGET_RT_LITTLE_ENDIAN 0
        #define TARGET_RT_BIG_ENDIAN    1
        #define TARGET_RT_64_BIT        0
        #ifdef __MACOS_CLASSIC__
           #define TARGET_RT_MAC_CFM    1
           #define TARGET_RT_MAC_MACHO  0
        #else
           #define TARGET_RT_MAC_CFM    0
           #define TARGET_RT_MAC_MACHO  1
       #endif
    #elif defined(__ppc64__)
        #define TARGET_CPU_PPC          0
        #define TARGET_CPU_PPC64        1
        #define TARGET_CPU_68K          0
        #define TARGET_CPU_X86          0
        #define TARGET_CPU_X86_64       0
        #define TARGET_CPU_ARM          0
        #define TARGET_CPU_MIPS         0
        #define TARGET_CPU_SPARC        0  
        #define TARGET_CPU_ALPHA        0
        #define TARGET_RT_LITTLE_ENDIAN 0
        #define TARGET_RT_BIG_ENDIAN    1
        #define TARGET_RT_64_BIT        1
        #define TARGET_RT_MAC_CFM       0
        #define TARGET_RT_MAC_MACHO     1
     #elif defined(__i386__)
        #define TARGET_CPU_PPC          0
        #define TARGET_CPU_PPC64        0
        #define TARGET_CPU_68K          0
        #define TARGET_CPU_X86          1
        #define TARGET_CPU_X86_64       0
        #define TARGET_CPU_ARM          0
        #define TARGET_CPU_MIPS         0
        #define TARGET_CPU_SPARC        0
        #define TARGET_CPU_ALPHA        0
        #define TARGET_RT_MAC_CFM       0
        #define TARGET_RT_MAC_MACHO     1
        #define TARGET_RT_LITTLE_ENDIAN 1
        #define TARGET_RT_BIG_ENDIAN    0
        #define TARGET_RT_64_BIT        0
     #elif defined(__x86_64__)
        #define TARGET_CPU_PPC          0
        #define TARGET_CPU_PPC64        0
        #define TARGET_CPU_68K          0
        #define TARGET_CPU_X86          0
        #define TARGET_CPU_X86_64       1
        #define TARGET_CPU_ARM          0
        #define TARGET_CPU_MIPS         0
        #define TARGET_CPU_SPARC        0
        #define TARGET_CPU_ALPHA        0
        #define TARGET_RT_MAC_CFM       0
        #define TARGET_RT_MAC_MACHO     1
        #define TARGET_RT_LITTLE_ENDIAN 1
        #define TARGET_RT_BIG_ENDIAN    0
        #define TARGET_RT_64_BIT        1
     #elif defined(__arm__)
        #define TARGET_CPU_PPC          0
        #define TARGET_CPU_PPC64        0
        #define TARGET_CPU_68K          0
        #define TARGET_CPU_X86          0
        #define TARGET_CPU_X86_64       0
        #define TARGET_CPU_ARM          1
        #define TARGET_CPU_MIPS         0
        #define TARGET_CPU_SPARC        0
        #define TARGET_CPU_ALPHA        0
        #define TARGET_RT_MAC_CFM       0
        #define TARGET_RT_MAC_MACHO     1
        #define TARGET_RT_LITTLE_ENDIAN 1
        #define TARGET_RT_BIG_ENDIAN    0
        #define TARGET_RT_64_BIT        0
    #else
        #error unrecognized GNU C compiler
    #endif


/*
 *   CodeWarrior compiler from Metrowerks/Motorola
 */
#elif defined(__MWERKS__)
    #define TARGET_OS_MAC               1
    #define TARGET_OS_WIN32             0
    #define TARGET_OS_UNIX              0
    #define TARGET_OS_EMBEDDED          0
    #if defined(__POWERPC__)
        #define TARGET_CPU_PPC          1
        #define TARGET_CPU_PPC64        0
        #define TARGET_CPU_68K          0
        #define TARGET_CPU_X86          0
        #define TARGET_CPU_MIPS         0
        #define TARGET_CPU_SPARC        0
        #define TARGET_CPU_ALPHA        0
        #define TARGET_RT_LITTLE_ENDIAN 0
        #define TARGET_RT_BIG_ENDIAN    1
    #elif defined(__INTEL__)
        #define TARGET_CPU_PPC          0
        #define TARGET_CPU_PPC64        0
        #define TARGET_CPU_68K          0
        #define TARGET_CPU_X86          1
        #define TARGET_CPU_MIPS         0
        #define TARGET_CPU_SPARC        0
        #define TARGET_CPU_ALPHA        0
        #define TARGET_RT_LITTLE_ENDIAN 1
        #define TARGET_RT_BIG_ENDIAN    0
    #else
        #error unknown Metrowerks CPU type
    #endif
    #define TARGET_RT_64_BIT            0
    #ifdef __MACH__
        #define TARGET_RT_MAC_CFM       0
        #define TARGET_RT_MAC_MACHO     1
    #else
        #define TARGET_RT_MAC_CFM       1
        #define TARGET_RT_MAC_MACHO     0
    #endif

/*
 *   unknown compiler
 */
#else
    #if defined(TARGET_CPU_PPC) && TARGET_CPU_PPC
        #define TARGET_CPU_PPC64    0
        #define TARGET_CPU_68K      0
        #define TARGET_CPU_X86      0
        #define TARGET_CPU_X86_64   0
        #define TARGET_CPU_ARM      0
        #define TARGET_CPU_MIPS     0
        #define TARGET_CPU_SPARC    0
        #define TARGET_CPU_ALPHA    0
    #elif defined(TARGET_CPU_PPC64) && TARGET_CPU_PPC64
        #define TARGET_CPU_PPC      0
        #define TARGET_CPU_68K      0
        #define TARGET_CPU_X86      0
        #define TARGET_CPU_X86_64   0
        #define TARGET_CPU_ARM      0
        #define TARGET_CPU_MIPS     0
        #define TARGET_CPU_SPARC    0
        #define TARGET_CPU_ALPHA    0
    #elif defined(TARGET_CPU_X86) && TARGET_CPU_X86
        #define TARGET_CPU_PPC      0
        #define TARGET_CPU_PPC64    0
        #define TARGET_CPU_X86_64   0
        #define TARGET_CPU_68K      0
        #define TARGET_CPU_ARM      0
        #define TARGET_CPU_MIPS     0
        #define TARGET_CPU_SPARC    0
        #define TARGET_CPU_ALPHA    0
    #elif defined(TARGET_CPU_X86_64) && TARGET_CPU_X86_64
        #define TARGET_CPU_PPC      0
        #define TARGET_CPU_PPC64    0
        #define TARGET_CPU_X86      0
        #define TARGET_CPU_68K      0
        #define TARGET_CPU_ARM      0
        #define TARGET_CPU_MIPS     0
        #define TARGET_CPU_SPARC    0
        #define TARGET_CPU_ALPHA    0
    #elif defined(TARGET_CPU_ARM) && TARGET_CPU_ARM
        #define TARGET_CPU_PPC      0
        #define TARGET_CPU_PPC64    0
        #define TARGET_CPU_X86      0
        #define TARGET_CPU_X86_64   0
        #define TARGET_CPU_68K      0
        #define TARGET_CPU_MIPS     0
        #define TARGET_CPU_SPARC    0
        #define TARGET_CPU_ALPHA    0
    #else
        /*
            NOTE:   If your compiler errors out here then support for your compiler
            has not yet been added to TargetConditionals.h.  
           
            TargetConditionals.h is designed to be plug-and-play.  It auto detects
            which compiler is being run and configures the TARGET_ conditionals
            appropriately.  
           
            The short term work around is to set the TARGET_CPU_ and TARGET_OS_
            on the command line to the compiler (e.g. -DTARGET_CPU_MIPS=1 -DTARGET_OS_UNIX=1)
           
            The long term solution is to add a new case to this file which
            auto detects your compiler and sets up the TARGET_ conditionals.
            Then submit the changes to Apple Computer.
        */
        #error TargetConditionals.h: unknown compiler (see comment above)
        #define TARGET_CPU_PPC    0
        #define TARGET_CPU_68K    0
        #define TARGET_CPU_X86    0
        #define TARGET_CPU_ARM    0
        #define TARGET_CPU_MIPS   0
        #define TARGET_CPU_SPARC  0
        #define TARGET_CPU_ALPHA  0
    #endif
    #define TARGET_OS_MAC                1
    #define TARGET_OS_WIN32              0
    #define TARGET_OS_UNIX               0
    #define TARGET_OS_EMBEDDED           0
    #if TARGET_CPU_PPC || TARGET_CPU_PPC64
        #define TARGET_RT_BIG_ENDIAN     1
        #define TARGET_RT_LITTLE_ENDIAN  0
    #else
        #define TARGET_RT_BIG_ENDIAN     0
        #define TARGET_RT_LITTLE_ENDIAN  1
    #endif
    #if TARGET_CPU_PPC64 || TARGET_CPU_X86_64
        #define TARGET_RT_64_BIT         1
    #else
        #define TARGET_RT_64_BIT         0
    #endif
    #ifdef __MACH__
        #define TARGET_RT_MAC_MACHO      1
        #define TARGET_RT_MAC_CFM        0
    #else
        #define TARGET_RT_MAC_MACHO      0
        #define TARGET_RT_MAC_CFM        1
    #endif
   
#endif

#endif  /* __TARGETCONDITIONALS__ */

Now I don't quite know what you mean by "preprocessed version of Config.hpp." but I assume you mean a list of the values of the defines. How might I get that? (Again, new to C++, sorry.) Just point me in the right direction and will get them to you ASAP.

Oh, also, I am not using XCode or have installed its Developer Tools(I am using VS Code: https://code.visualstudio.com/). I moved the SFML include(named "SFML", of course) directory right into my "/usr/local/include" directory. Should I have done that?

[Laurent]

Now I don't quite know what you mean by "preprocessed version of Config.hpp."

You can invoke the compiler on a source file, with specific flags, so that it outputs the preprocesses version of that file, ie. with only the preprocessor pass done (not compiled). The goal is to know how the preprocessor replaces those macros in Config.hpp.

[Mr.Zeus]

The preprocessor passed "Config.hpp" file:

(click to show/hide)

# 1 "Config.hpp"
# 1 "<built-in>" 1
# 1 "<built-in>" 3
# 175 "<built-in>" 3
# 1 "<command line>" 1
# 1 "<built-in>" 2
# 1 "Config.hpp" 2
# 52 "Config.hpp"
# 1 "./TargetConditionals.h" 1
# 53 "Config.hpp" 2
# 206 "Config.hpp"
namespace sf
{
    typedef signed char Int8;
    typedef unsigned char Uint8;
    typedef signed short Int16;
    typedef unsigned short Uint16;
    typedef signed int Int32;
    typedef unsigned int Uint32;
        typedef signed long long Int64;
        typedef unsigned long long Uint64;
}
 

Hope it helps!