initial buildroot for linux 5.15

package/efivar/Config.in

@@ -0,0 +1,30 @@
+config BR2_PACKAGE_EFIVAR_ARCH_SUPPORTS
+	bool
+	default y
+	depends on BR2_arm || BR2_aarch64 || BR2_i386 || BR2_x86_64 \
+		|| BR2_powerpc64le || BR2_mipsel || BR2_mips64el
+
+config BR2_PACKAGE_EFIVAR
+	bool "efivar"
+	depends on BR2_PACKAGE_EFIVAR_ARCH_SUPPORTS
+	depends on !BR2_STATIC_LIBS # dlfcn.h
+	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12 # linux/nvme.h
+	# linux/nvme.h has been renamed to linux/nvme_ioctl.h since 4.4,
+	# and the efivar source handles that situation. However, some
+	# Sourcery CodeBench toolchains use 4.4 kernel headers but they
+	# don't have that header file renamed, and that is causing build
+	# failures. So, prevent this package to be built using those
+	# toolchains.
+	depends on !BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
+	help
+	  Tools and libraries to manipulate EFI variables
+
+	  https://github.com/rhboot/efivar
+
+comment "efivar needs a toolchain w/ dynamic library, headers >= 3.12, gcc >= 4.9"
+	depends on BR2_PACKAGE_EFIVAR_ARCH_SUPPORTS
+	depends on BR2_STATIC_LIBS || \
+		!BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12 || \
+		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_9
+	depends on !BR2_TOOLCHAIN_EXTERNAL_CODESOURCERY_MIPS