initial buildroot for linux 5.15

package/libseccomp/Config.in

@@ -0,0 +1,28 @@
+config BR2_PACKAGE_LIBSECCOMP_ARCH_SUPPORTS
+	bool
+	default y if BR2_aarch64
+	default y if BR2_arm || BR2_armeb
+	default y if BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el
+	default y if BR2_i386 || BR2_x86_64
+	default y if BR2_powerpc64 || BR2_powerpc
+
+config BR2_PACKAGE_LIBSECCOMP
+	bool "libseccomp"
+	depends on BR2_PACKAGE_LIBSECCOMP_ARCH_SUPPORTS
+	depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12
+	help
+	  High level interface to the Linux Kernel's seccomp filter
+
+	  The libseccomp library provides an easy to use, platform
+	  independent, interface to the Linux Kernel's syscall filtering
+	  mechanism: seccomp. The libseccomp API is designed to abstract
+	  away the underlying BPF based syscall filter language and
+	  present a more conventional function-call based filtering
+	  interface that should be familiar to, and easily adopted by
+	  application developers.
+
+	  https://github.com/seccomp/libseccomp
+
+comment "libseccomp needs a toolchain w/ headers >= 3.12"
+	depends on BR2_PACKAGE_LIBSECCOMP_ARCH_SUPPORTS
+	depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_12

package/libseccomp/libseccomp.hash

@@ -0,0 +1,4 @@
+# From https://github.com/seccomp/libseccomp/releases/tag/v2.4.4
+sha256  4e79738d1ef3c9b7ca9769f1f8b8d84fc17143c2c1c432e53b9c64787e0ff3eb  libseccomp-2.4.4.tar.gz
+# Locally calculated
+sha256  102900208eef27b766380135906d431dba87edaa7ec6aa72e6ebd3dd67f3a97b  LICENSE

package/libseccomp/libseccomp.mk

@@ -0,0 +1,14 @@
+################################################################################
+#
+# libseccomp
+#
+################################################################################
+
+LIBSECCOMP_VERSION = 2.4.4
+LIBSECCOMP_SITE = https://github.com/seccomp/libseccomp/releases/download/v$(LIBSECCOMP_VERSION)
+LIBSECCOMP_LICENSE = LGPL-2.1
+LIBSECCOMP_LICENSE_FILES = LICENSE
+LIBSECCOMP_CPE_ID_VENDOR = libseccomp_project
+LIBSECCOMP_INSTALL_STAGING = YES
+
+$(eval $(autotools-package))