%general-entities; ]> Linux-Libc-Headers tools, headers For years it has been common practice to use raw kernel headers (straight from a kernel tarball) in /usr/include, but over the last few years, the kernel developers have taken a strong stance that this should not be done. This gave birth to the Linux-Libc-Headers Project, which was designed to maintain an Application Programming Interface (API) stable version of the Linux headers. Install the header files: cp -R include/asm-i386 /tools/include/asm cp -R include/linux /tools/include If your architecture is not i386 (compatible), adjust the first command accordingly.