initial buildroot for linux 5.15

package/libxmlpp/Config.in

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+config BR2_PACKAGE_LIBXMLPP
+	bool "libxml++"
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # C++11
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_USE_WCHAR # glibmm -> libglib2
+	depends on BR2_TOOLCHAIN_HAS_THREADS # glibmm -> libglib2
+	depends on BR2_USE_MMU # glibmm -> libglib2
+	select BR2_PACKAGE_LIBXML2
+	select BR2_PACKAGE_GLIBMM
+	help
+	  libxml++ is a C++ wrapper for the libxml XML parser library.
+
+	  https://libxmlplusplus.github.io/libxmlplusplus/
+
+comment "libxml++ needs a toolchain w/ C++, wchar, threads, gcc >= 4.9"
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 || !BR2_USE_WCHAR \
+		||!BR2_TOOLCHAIN_HAS_THREADS || !BR2_INSTALL_LIBSTDCPP
+	depends on BR2_USE_MMU

package/libxmlpp/libxmlpp.hash

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+# From http://ftp.gnome.org/pub/GNOME/sources/libxml++/3.2/libxml++-3.2.0.sha256sum
+sha256  b786fae7fd7820d356698069a787d107995c3efcbef50d8f4efd3766ab768e4f  libxml++-3.2.0.tar.xz
+
+# Hash for license file
+sha256  a190dc9c8043755d90f8b0a75fa66b9e42d4af4c980bf5ddc633f0124db3cee7  COPYING

package/libxmlpp/libxmlpp.mk

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+################################################################################
+#
+# libxmlpp
+#
+################################################################################
+
+LIBXMLPP_VERSION_MAJOR = 3.2
+LIBXMLPP_VERSION = $(LIBXMLPP_VERSION_MAJOR).0
+LIBXMLPP_LICENSE = LGPL-2.1 (library), LGPL-2.0+ (examples)
+LIBXMLPP_LICENSE_FILES = COPYING
+LIBXMLPP_SOURCE = libxml++-$(LIBXMLPP_VERSION).tar.xz
+LIBXMLPP_SITE = http://ftp.gnome.org/pub/GNOME/sources/libxml++/$(LIBXMLPP_VERSION_MAJOR)
+LIBXMLPP_INSTALL_STAGING = YES
+LIBXMLPP_DEPENDENCIES = libxml2 glibmm host-pkgconf
+
+$(eval $(autotools-package))