initial buildroot for linux 5.15

package/slirp/Config.in

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+config BR2_PACKAGE_SLIRP
+	bool "slirp"
+	depends on BR2_USE_MMU # libglib2
+	depends on BR2_USE_WCHAR # libglib2
+	depends on BR2_TOOLCHAIN_HAS_THREADS # libglib2
+	select BR2_PACKAGE_LIBGLIB2
+	help
+	  libslirp is a user-mode networking library used by virtual
+	  machines, containers or various tools.
+
+	  https://gitlab.freedesktop.org/slirp/libslirp/
+
+	  NOTE:
+	  This package has some history of a unique kind:
+	    - originally developped as 'slirp' by Danny Gasparovski, and
+	      seemingly abandonned (developper /disapeared/)
+	    - then re-maintained at sourceforge by "Kelly", up to some
+	      time around 2009: http://slirp.sourceforge.net/
+	    - during that period, QEMU (Fabrice BELLARD) forked the code
+	      and included it in QEMU
+	    - and it was imported from this breed by the Spice project
+	      around May 2009 which archived it in 2012
+	    - So we switched to
+	      https://gitlab.freedesktop.org/slirp/libslirp
+
+comment "slirp needs a toolchain w/ wchar, threads"
+	depends on BR2_USE_MMU
+	depends on !BR2_USE_WCHAR || !BR2_TOOLCHAIN_HAS_THREADS

package/slirp/slirp.hash

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+# Locally computed:
+sha256  b8a22ac4d601ba16122a67827c0f4361785d4d283f21ff8ed48d4aa1e7693477  libslirp-4.6.1.tar.xz
+sha256  b28aecf4796a6a22054167f0a976de13d9db335669d37afd2dc7ea4c335e1e13  COPYRIGHT

package/slirp/slirp.mk

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+################################################################################
+#
+# slirp
+#
+################################################################################
+
+SLIRP_VERSION = 4.6.1
+SLIRP_SOURCE = libslirp-$(SLIRP_VERSION).tar.xz
+SLIRP_SITE = https://gitlab.freedesktop.org/slirp/libslirp/uploads/83b199ea6fcdfc0c243dfde8546ee4c9
+SLIRP_LICENSE = BSD-3-Clause
+SLIRP_LICENSE_FILES = COPYRIGHT
+SLIRP_CPE_ID_VENDOR = libslirp_project
+SLIRP_CPE_ID_PRODUCT = libslirp
+SLIRP_INSTALL_STAGING = YES
+SLIRP_DEPENDENCIES = libglib2
+
+$(eval $(meson-package))