On 07/06/2015 04:01 PM, Yuxin Ren wrote: > I use Ubuntu. Year I also can find unwind.h on my system. > But I cannot find it in the gcc source code (cloned from the gcc github). > Where is unwind.h in the gcc source code? > And if it doesn't have such file, how it can be correctly compiled? Did you not see >> unwind.h is copied from gcc/trunk/libgcc/unwind-generic.h on some >> systems. unwind.h is created and installed when GCC is built and installed. Andrew.