Details on this package are located in Section 6.7.2, “Contents of Linux-Headers.”
The Linux-Headers expose the kernel's API for use by Glibc.
The Linux kernel needs to expose an Application Programming Interface (API) for the system's C library (Glibc in LFS) to utilize. This is done by way of sanitizing various C header files that are shipped in the Linux kernel source tarball.
Install the header files:
make mrproper make headers_install make headers_check cp -av usr/include/* /tools/include
Details on this package are located in Section 6.7.2, “Contents of Linux-Headers.”