bc 1.06.95 bc --version
Sphinx\ [#f1]_ 1.7 sphinx-build --version
cpio any cpio --version
+GNU tar 1.28 tar --version
+gtags (optional) 6.6.5 gtags --version
====================== =============== ========================================
.. [#f1] Sphinx is needed only to build the Kernel documentation
enabled. You will also need openssl development packages to build kernels 4.3
and higher.
+Tar
+---
+
+GNU tar is needed if you want to enable access to the kernel headers via sysfs
+(CONFIG_IKHEADERS).
+
+gtags / GNU GLOBAL (optional)
+-----------------------------
+
+The kernel build requires GNU GLOBAL version 6.6.5 or later to generate
+tag files through ``make gtags``. This is due to its use of the gtags
+``-C (--directory)`` flag.
System utilities
****************