Riccardo Mottola wrote:
while compiling base on Linux/ppc32 with gcc 4.3.2 I get:
Compiling file NSObject.m ...
/tmp/ccwBOh8K.s: Assembler messages:
/tmp/ccwBOh8K.s:8384: Error: symbol `incmodified' is already defined
make[4]: *** [obj/libgnustep-base.obj/NSObject.m.o] Error 1
What could that be? A compiler error? or some problematic code
which confuses the linker/compiler?
It's a duplication of assembler labels in inline assembler code that
is used more than once. I have fixed that in svn by using a local
label instead of incmodified.
Fred Kiefer wrote:
What I don't understand is how this code could lead to a duplicate
definition of this symbol. Could you try to have a look at the
intermediate assembler file? Most likely it gets deleted before you
may have a look, but you should be able to ask the compiler just to
produce this file and stop compilation there.
Code duplication occurs because GSAtomicIncrement is used in
NSIncrementExtraRefCount, which is a public inline function. Thus,
the compiler generates the definition of NSIncrementExtraRefCount so
that other files can call it. Furthermore the function's code is
expanded inline where it is used in NSObject.m, namely in the -retain
method.
Wolfgang
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