GCC 4.8 Compiles on OS X 10.11.1 with XCode 7.1 (7B91b); Availability.h has a couple obvious bugs (sigh.) BUT FIXED!

0-gists-are-sorted-alphabetically-hackityhack.md

README FIRST; or. tl;dr: copy the file below to /usr/local/include and rebrew.

October 24, 2015: Being slightly bitter about Apple oversights into their seemingly thoughtful approaches and finding zero solutions in my fully updated OS X 10.1 (El Capitan!) macbook, I stopped waiting. This problem was easy enough; small oversight and lines 228 and 250 are modified to keep things moving on OS X. To be fair these fixes may also apply to the blocks for tvOS, watchos, ios, etc. The solution to this kind of stuff is to simply test these headers before pushing them out to the public.

apple@rich: /somewhere/gcc/: ./configure && make check

But I digress. This is how you get up and running with homebrew:

1. Move this copy of Availability.h into your /usr/local/include directory
2. If you find you still have the problem, you should introduce your include flag to homebrew at the command line, but you should be fine with this:

  brew install -vd gcc48

3. Now, sit back and relax. My little ol' 2014 macbook, albeit unfairly used finally returned this;

  ==> Summary
  🍺  /usr/local/Cellar/gcc48/4.8.4: 1028 files, 143M, built in 22.8 minutes

NOTE: If you are still running into the this mess:

In file included from /usr/include/stdlib.h:61:0,
                 from ../../../../libsanitizer/sanitizer_common/sanitizer_allocator.cc:22:
/usr/include/Availability.h:221:22: error: missing binary operator before token "("
   #if __has_attribute(availability)
                  ^
/usr/include/Availability.h:243:22: error: missing binary operator before token "("
   #if __has_attribute(availability)

Be cool. Stop drop and roll. And check to see if homebrew magically included your /usr/local/include folder and make sure it's showing up before the evil version of the file in /usr/include. Lots of ways to make that happen, but the magic approach should work.

--pavgup
This is a hack.  Wait for apple.

Availability.h

/*
 * Copyright (c) 2007-2015 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@
 */
 
#ifndef __AVAILABILITY__
#define __AVAILABILITY__
 /*     
    These macros are for use in OS header files. They enable function prototypes
    and Objective-C methods to be tagged with the OS version in which they
    were first available; and, if applicable, the OS version in which they 
    became deprecated.  
     
    The desktop Mac OS X and iOS each have different version numbers.
    The __OSX_AVAILABLE_STARTING() macro allows you to specify both the desktop
    and iOS version numbers.  For instance:
        __OSX_AVAILABLE_STARTING(__MAC_10_2,__IPHONE_2_0)
    means the function/method was first available on Mac OS X 10.2 on the desktop
    and first available in iOS 2.0 on the iPhone.
    
    If a function is available on one platform, but not the other a _NA (not
    applicable) parameter is used.  For instance:
            __OSX_AVAILABLE_STARTING(__MAC_10_3,__IPHONE_NA)
    means that the function/method was first available on Mac OS X 10.3, and it
    currently not implemented on the iPhone.

    At some point, a function/method may be deprecated.  That means Apple
    recommends applications stop using the function, either because there is a 
    better replacement or the functionality is being phased out.  Deprecated
    functions/methods can be tagged with a __OSX_AVAILABLE_BUT_DEPRECATED()
    macro which specifies the OS version where the function became available
    as well as the OS version in which it became deprecated.  For instance:
        __OSX_AVAILABLE_BUT_DEPRECATED(__MAC_10_0,__MAC_10_5,__IPHONE_NA,__IPHONE_NA)
    means that the function/method was introduced in Mac OS X 10.0, then
    became deprecated beginning in Mac OS X 10.5.  On iOS the function 
    has never been available.  
    
    For these macros to function properly, a program must specify the OS version range 
    it is targeting.  The min OS version is specified as an option to the compiler:
    -mmacosx-version-min=10.x when building for Mac OS X, and -miphoneos-version-min=y.z
    when building for the iPhone.  The upper bound for the OS version is rarely needed,
    but it can be set on the command line via: -D__MAC_OS_X_VERSION_MAX_ALLOWED=10x0 for
    Mac OS X and __IPHONE_OS_VERSION_MAX_ALLOWED = y0z00 for iOS.  
    
    Examples:

        A function available in Mac OS X 10.5 and later, but not on the phone:
        
            extern void mymacfunc() __OSX_AVAILABLE_STARTING(__MAC_10_5,__IPHONE_NA);


        An Objective-C method in Mac OS X 10.5 and later, but not on the phone:
        
            @interface MyClass : NSObject
            -(void) mymacmethod __OSX_AVAILABLE_STARTING(__MAC_10_5,__IPHONE_NA);
            @end

        
        An enum available on the phone, but not available on Mac OS X:
        
            #if __IPHONE_OS_VERSION_MIN_REQUIRED
                enum { myEnum = 1 };
            #endif
           Note: this works when targeting the Mac OS X platform because 
           __IPHONE_OS_VERSION_MIN_REQUIRED is undefined which evaluates to zero. 
        

        An enum with values added in different iPhoneOS versions:
		
			enum {
			    myX  = 1,	// Usable on iPhoneOS 2.1 and later
			    myY  = 2,	// Usable on iPhoneOS 3.0 and later
			    myZ  = 3,	// Usable on iPhoneOS 3.0 and later
				...
		      Note: you do not want to use #if with enumeration values
			  when a client needs to see all values at compile time
			  and use runtime logic to only use the viable values.
			  

    It is also possible to use the *_VERSION_MIN_REQUIRED in source code to make one
    source base that can be compiled to target a range of OS versions.  It is best
    to not use the _MAC_* and __IPHONE_* macros for comparisons, but rather their values.
    That is because you might get compiled on an old OS that does not define a later
    OS version macro, and in the C preprocessor undefined values evaluate to zero
    in expresssions, which could cause the #if expression to evaluate in an unexpected
    way.
    
        #ifdef __MAC_OS_X_VERSION_MIN_REQUIRED
            // code only compiled when targeting Mac OS X and not iPhone
            // note use of 1050 instead of __MAC_10_5
            #if __MAC_OS_X_VERSION_MIN_REQUIRED < 1050
                // code in here might run on pre-Leopard OS
            #else
                // code here can assume Leopard or later
            #endif
        #endif


*/

#define __MAC_10_0            1000
#define __MAC_10_1            1010
#define __MAC_10_2            1020
#define __MAC_10_3            1030
#define __MAC_10_4            1040
#define __MAC_10_5            1050
#define __MAC_10_6            1060
#define __MAC_10_7            1070
#define __MAC_10_8            1080
#define __MAC_10_9            1090
#define __MAC_10_10         101000
#define __MAC_10_10_2       101002
#define __MAC_10_10_3       101003
#define __MAC_10_11         101100
/* __MAC_NA is not defined to a value but is uses as a token by macros to indicate that the API is unavailable */

#define __IPHONE_2_0     20000
#define __IPHONE_2_1     20100
#define __IPHONE_2_2     20200
#define __IPHONE_3_0     30000
#define __IPHONE_3_1     30100
#define __IPHONE_3_2     30200
#define __IPHONE_4_0     40000
#define __IPHONE_4_1     40100
#define __IPHONE_4_2     40200
#define __IPHONE_4_3     40300
#define __IPHONE_5_0     50000
#define __IPHONE_5_1     50100
#define __IPHONE_6_0     60000
#define __IPHONE_6_1     60100
#define __IPHONE_7_0     70000
#define __IPHONE_7_1     70100
#define __IPHONE_8_0     80000
#define __IPHONE_8_1     80100
#define __IPHONE_8_2     80200
#define __IPHONE_8_3     80300
#define __IPHONE_8_4     80400
#define __IPHONE_9_0     90000
/* __IPHONE_NA is not defined to a value but is uses as a token by macros to indicate that the API is unavailable */

#define __TVOS_9_0       90000

#define __WATCHOS_1_0    10000
#define __WATCHOS_2_0    20000

#include <AvailabilityInternal.h>

#ifdef __IPHONE_OS_VERSION_MIN_REQUIRED
    #define __OSX_AVAILABLE_STARTING(_osx, _ios) __AVAILABILITY_INTERNAL##_ios
    #define __OSX_AVAILABLE_BUT_DEPRECATED(_osxIntro, _osxDep, _iosIntro, _iosDep) \
                                                    __AVAILABILITY_INTERNAL##_iosIntro##_DEP##_iosDep
    #define __OSX_AVAILABLE_BUT_DEPRECATED_MSG(_osxIntro, _osxDep, _iosIntro, _iosDep, _msg) \
                                                    __AVAILABILITY_INTERNAL##_iosIntro##_DEP##_iosDep##_MSG(_msg)

#elif defined(__MAC_OS_X_VERSION_MIN_REQUIRED)
    #define __OSX_AVAILABLE_STARTING(_osx, _ios) __AVAILABILITY_INTERNAL##_osx
    #define __OSX_AVAILABLE_BUT_DEPRECATED(_osxIntro, _osxDep, _iosIntro, _iosDep) \
                                                    __AVAILABILITY_INTERNAL##_osxIntro##_DEP##_osxDep
    #define __OSX_AVAILABLE_BUT_DEPRECATED_MSG(_osxIntro, _osxDep, _iosIntro, _iosDep, _msg) \
                                                    __AVAILABILITY_INTERNAL##_osxIntro##_DEP##_osxDep##_MSG(_msg)

#else
    #define __OSX_AVAILABLE_STARTING(_osx, _ios)
    #define __OSX_AVAILABLE_BUT_DEPRECATED(_osxIntro, _osxDep, _iosIntro, _iosDep)
    #define __OSX_AVAILABLE_BUT_DEPRECATED_MSG(_osxIntro, _osxDep, _iosIntro, _iosDep, _msg)
#endif


#if defined(__has_feature)
  #if __has_feature(attribute_availability_with_message)
    #define __OS_AVAILABILITY(_target, _availability)            __attribute__((availability(_target,_availability)))
    #define __OS_AVAILABILITY_MSG(_target, _availability, _msg)  __attribute__((availability(_target,_availability,message=_msg)))
  #else
    #define __OS_AVAILABILITY(_target, _availability)
    #define __OS_AVAILABILITY_MSG(_target, _availability, _msg)
  #endif
#else
    #define __OS_AVAILABILITY(_target, _availability)
    #define __OS_AVAILABILITY_MSG(_target, _availability, _msg)
#endif


/* for use to document app extension usage */
#if defined(__has_feature)
  #if __has_feature(attribute_availability_app_extension)
    #define __OSX_EXTENSION_UNAVAILABLE(_msg)  __OS_AVAILABILITY_MSG(macosx_app_extension,unavailable,_msg)
    #define __IOS_EXTENSION_UNAVAILABLE(_msg)  __OS_AVAILABILITY_MSG(ios_app_extension,unavailable,_msg)
  #else
    #define __OSX_EXTENSION_UNAVAILABLE(_msg)
    #define __IOS_EXTENSION_UNAVAILABLE(_msg)
  #endif
#else
    #define __OSX_EXTENSION_UNAVAILABLE(_msg)
    #define __IOS_EXTENSION_UNAVAILABLE(_msg)
#endif

#define __OS_EXTENSION_UNAVAILABLE(_msg)  __OSX_EXTENSION_UNAVAILABLE(_msg) __IOS_EXTENSION_UNAVAILABLE(_msg)



/* for use marking APIs available info for Mac OSX */
#if defined(__has_attribute) && defined(__has_feature)
  #if __has_attribute(availability)
    #define __OSX_UNAVAILABLE                    __OS_AVAILABILITY(macosx,unavailable)
    #define __OSX_AVAILABLE(_vers)               __OS_AVAILABILITY(macosx,introduced=_vers)
    #define __OSX_DEPRECATED(_start, _dep, _msg) __OSX_AVAILABLE(_start) __OS_AVAILABILITY_MSG(macosx,deprecated=_dep,_msg)
  #endif
#endif

#ifndef __OSX_UNAVAILABLE
  #define __OSX_UNAVAILABLE
#endif

#ifndef __OSX_AVAILABLE
  #define __OSX_AVAILABLE(_vers)
#endif

#ifndef __OSX_DEPRECATED
  #define __OSX_DEPRECATED(_start, _dep, _msg)
#endif


/* for use marking APIs available info for iOS */
#if defined(__has_attribute) && defined(__has_feature)
  #if __has_attribute(availability)
    #define __IOS_UNAVAILABLE                    __OS_AVAILABILITY(ios,unavailable)
    #define __IOS_PROHIBITED                     __OS_AVAILABILITY(ios,unavailable)
    #define __IOS_AVAILABLE(_vers)               __OS_AVAILABILITY(ios,introduced=_vers)
    #define __IOS_DEPRECATED(_start, _dep, _msg) __IOS_AVAILABLE(_start) __OS_AVAILABILITY_MSG(ios,deprecated=_dep,_msg)
  #endif
#endif

#ifndef __IOS_UNAVAILABLE
  #define __IOS_UNAVAILABLE
#endif

#ifndef __IOS_PROHIBITED
  #define __IOS_PROHIBITED
#endif

#ifndef __IOS_AVAILABLE
  #define __IOS_AVAILABLE(_vers)
#endif

#ifndef __IOS_DEPRECATED
  #define __IOS_DEPRECATED(_start, _dep, _msg)
#endif


/* for use marking APIs available info for tvOS */
#if defined(__has_feature)
  #if __has_feature(attribute_availability_tvos)
    #define __TVOS_UNAVAILABLE                    __OS_AVAILABILITY(tvos,unavailable)
    #define __TVOS_PROHIBITED                     __OS_AVAILABILITY(tvos,unavailable)
    #define __TVOS_AVAILABLE(_vers)               __OS_AVAILABILITY(tvos,introduced=_vers)
    #define __TVOS_DEPRECATED(_start, _dep, _msg) __TVOS_AVAILABLE(_start) __OS_AVAILABILITY_MSG(tvos,deprecated=_dep,_msg)
  #endif
#endif

#ifndef __TVOS_UNAVAILABLE
  #define __TVOS_UNAVAILABLE
#endif

#ifndef __TVOS_PROHIBITED
  #define __TVOS_PROHIBITED
#endif

#ifndef __TVOS_AVAILABLE
  #define __TVOS_AVAILABLE(_vers)
#endif

#ifndef __TVOS_DEPRECATED
  #define __TVOS_DEPRECATED(_start, _dep, _msg)
#endif


/* for use marking APIs available info for Watch OS */
#if defined(__has_feature)
  #if __has_feature(attribute_availability_watchos)
    #define __WATCHOS_UNAVAILABLE                    __OS_AVAILABILITY(watchos,unavailable)
    #define __WATCHOS_PROHIBITED                     __OS_AVAILABILITY(watchos,unavailable)
    #define __WATCHOS_AVAILABLE(_vers)               __OS_AVAILABILITY(watchos,introduced=_vers)
    #define __WATCHOS_DEPRECATED(_start, _dep, _msg) __WATCHOS_AVAILABLE(_start) __OS_AVAILABILITY_MSG(watchos,deprecated=_dep,_msg)
  #endif
#endif

#ifndef __WATCHOS_UNAVAILABLE
  #define __WATCHOS_UNAVAILABLE
#endif

#ifndef __WATCHOS_PROHIBITED
  #define __WATCHOS_PROHIBITED
#endif

#ifndef __WATCHOS_AVAILABLE
  #define __WATCHOS_AVAILABLE(_vers)
#endif

#ifndef __WATCHOS_DEPRECATED
  #define __WATCHOS_DEPRECATED(_start, _dep, _msg)
#endif


#endif /* __AVAILABILITY__ *

I'm having this output from log

:info:build /usr/include/Availability.h:221:22: error: missing binary operator before token "("
:info:build #if __has_attribute(availability)
:info:build ^
:info:build /usr/include/Availability.h:243:22: error: missing binary operator before token "("
:info:build #if __has_attribute(availability)
:info:build ^
:info:build In file included from /usr/include/stdlib.h:61:0,
:info:build from /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_lang_gcc48/gcc48/work/gcc-4.8.5/libsanitizer/sanitizer_common/sanitizer_symbolizer_itanium.cc:15:
:info:build /usr/include/Availability.h:221:22: error: missing binary operator before token "("
:info:build #if __has_attribute(availability)
:info:build ^
:info:build /usr/include/Availability.h:243:22: error: missing binary operator before token "("
:info:build #if __has_attribute(availability)
:info:build ^

Looks like the same problem but i'm trying via Macports. I'll try with this hack. Thanks.

I can't edit content or permissions of this file. How did you do?

Hi FrancoHM,

I had the same problem as you with a MacPorts and I handled it on my El Captain. To start with everything you have to disable the restrictions on your system. To do this you have to start the system in the Recovery Mode and perform the csrutil disable command. just follow this tuts: http://stackoverflow.com/a/32910408
After you do this, you will be able to copy the Availability.h to /usr/include location.

Next I run the port install gcc48 but it also failed because of a type-o at the end of the file. Just add the '/' character to the last line:
-#endif /* __AVAILABILITY__ *
+#endif /* __AVAILABILITY__ */

This should help... for a while, because I see some other problem now:

Backtrace: command execution failed
while executing
"system -nice 0 $fullcmdstring"
("eval" body line 1)
invoked from within
"eval system $notty $nice $fullcmdstring"
invoked from within
"command_exec build"
(procedure "portbuild::build_main" line 8)
invoked from within
"portbuild::build_main org.macports.build"
("eval" body line 1)
invoked from within
"eval $procedure $targetname"
:info:build Warning: targets not executed for gcc48: org.macports.activate org.macports.build org.macports.destroot org.macports.install

khdevel said exactly what I would have guessed. Drop the restrictions on the machine first (csrutil disable -- khdevel's link is excellent) and then hop into the files and make adjustments. To be fair, I've not looked at this in a little while and am unsure if these changes are still relevant (though I'm guessing they still are as I write this).