Il 03/11/2012 16:26, Blue Swirl ha scritto: >> > It's a clang bug. The error should be suppressed, since the function is >> > used with the weak alias. >> > >> > Or try if adding "|| defined __clang__" to compiler.h fixes it. > It does.
Yeah, I tested now Clang/Linux myself and reported it as http://llvm.org/bugs/show_bug.cgi?id=14250. With a simple testcase such as this: static int g() { return 42; } typeof(g) f __attribute__((__weak__, __alias__("g"))); it's easy to see that the function is actually emitted---and with "g" as the name, even: .file "g2.c" .text .align 16, 0x90 .type g,@function g: # @g .cfi_startproc # BB#0: movl $42, %eax ret .Ltmp0: .size g, .Ltmp0-g .cfi_endproc .weak f f = g .section ".note.GNU-stack","",@progbits > Maybe __APPLE__ should be replaced by __clang__, or can the > problem also occur with GCC on Apple systems? It can occur with GCC, though it will be just a "note" if I understand correctly and not fail with -Werror. No idea whether the generated code would run, probably not. My favorite fix is to just disable the warning, otherwise make the function inline. Paolo
