Re: mingw compilation of base broken

[Fred Kiefer]

This problem is due to old versions of gcc (< 4.0) not supporting the 
build in __builtin_offsetof. I just committed a workaround that defines 
this as a macro. This code is based on a suggestion by David Chisnall 
and I could not test it myself as I don't have a gcc that old. Please 
give it a try and don't forget to test with gcc 2.95 as well.

Fred

On 22.08.2011 12:38, Riccardo Mottola wrote:
> while compiling I get:
>
> Compiling file NSNumberFormatter.m ...
> Compiling file NSObjCRuntime.m ...
> Compiling file NSObject.m ...
> NSObject.m:422: warning: implicit declaration of function
> `__builtin_offsetof'
> NSObject.m:422: error: syntax error before "struct"
> NSObject.m:422: warning: no semicolon at end of struct or union
> NSObject.m:422: error: syntax error before '}' token
> NSObject.m:422: error: syntax error before '}' token
> NSObject.m:422: error: syntax error before '}' token
> NSObject.m:422: error: syntax error before '}' token
> NSObject.m:424: error: syntax error before '}' token
> NSObject.m: In function `NSDecrementExtraRefCountWasZero':
> NSObject.m:474: error: invalid use of undefined type `struct obj_layout'
> NSObject.m:474: error: dereferencing pointer to incomplete type
> NSObject.m:489: error: invalid use of undefined type `struct obj_layout'
> NSObject.m:489: error: dereferencing pointer to incomplete type
> NSObject.m:511: error: invalid use of undefined type `struct obj_layout'
> NSObject.m:511: error: dereferencing pointer to incomplete type
> NSObject.m:517: error: invalid use of undefined type `struct obj_layout'
> NSObject.m:517: error: dereferencing pointer to incomplete type
> NSObject.m: In function `NSExtraRefCount':
> NSObject.m:542: error: invalid use of undefined type `struct obj_layout'
> NSObject.m:542: error: dereferencing pointer to incomplete type
> NSObject.m: In function `NSIncrementExtraRefCount':
> NSObject.m:585: error: invalid use of undefined type `struct obj_layout'
> NSObject.m:585: error: dereferencing pointer to incomplete type
> NSObject.m:607: error: invalid use of undefined type `struct obj_layout'
> NSObject.m:607: error: dereferencing pointer to incomplete type
> NSObject.m:612: error: invalid use of undefined type `struct obj_layout'
> NSObject.m:612: error: dereferencing pointer to incomplete type
> NSObject.m: In function `NSAllocateObject':
> NSObject.m:810: error: invalid application of `sizeof' to incomplete
> type `obj_layout'
> NSObject.m:819: error: invalid use of undefined type `struct obj_layout'
> NSObject.m:819: error: dereferencing pointer to incomplete type
> NSObject.m: In function `NSDeallocateObject':
> NSObject.m:860: error: invalid use of undefined type `struct obj_layout'
> NSObject.m:860: error: dereferencing pointer to incomplete type
> make[4]: *** [obj/libgnustep-base.obj/NSObject.m.o] Error 1
> make[3]: *** [internal-library-all_] Error 2
>
> Ideas? Anybody else experiencing something similar.
>
> This is not latest mingw, but it used to compile routinely up to about 2
> weeks ago.