On Fri, Nov 22, 2013 at 10:34 PM, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: > On 22 November 2013 14:09, Terry Guo wrote: >> But if you search i386.c, you will find many bool type variables. Why >> it works for i386.c but not for i386.h? > > i386.h is a header, it's not only used in one place. > > I assume your error is because i386.c is compiled as a C++ file, but > i386.h is included in a file that is compiled as a C file, e.g. > libgcc.c Yes. I have same understanding. Is it possible to compile libgcc.c as a C++ file? BR, Terry