buildroot/package/patch/Config.in

config BR2_PACKAGE_PATCH
	bool "patch"
	depends on BR2_USE_WCHAR
	help
	  Take patch files (containing difference listings) and apply them
	  to original files, producing patched versions.

	  http://www.gnu.org/software/patch/

comment "patch needs a toolchain with WCHAR support"
	depends on !BR2_USE_WCHAR