2013/12/20 Stephan Aßmus <superstippi@xxxxxx>: >> diff --git a/headers/private/kernel/arch/smp.h >> b/headers/private/kernel/arch/smp.h >> index f85fcf1..440617b 100644 >> --- a/headers/private/kernel/arch/smp.h >> +++ b/headers/private/kernel/arch/smp.h >> @@ -10,6 +10,8 @@ >> >> struct kernel_args; >> >> +class CPUSet; >> + >> >> #ifdef __cplusplus >> extern "C" { > > Just wondering… is it correct to add the forward definition in a part of the > header that may be used from C code? It would be correct if CPUSet was forward declared as a "struct". However, because: 1) this header is virtually empty when included in a C code, 2) it shouldn't be used by anything except src/system/kernel/smp.cpp and the file that implements the functions declared there, 3) I think we are using extern "C" in kernel much more often that it is absolutely necessary I think it would be better to just remove that __cplusplus guards from this header and make it C++ only. Paweł