initial buildroot for linux 5.15

package/rrdtool/Config.in

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+config BR2_PACKAGE_RRDTOOL
+	bool "rrdtool"
+	depends on BR2_USE_WCHAR # libglib2
+	depends on BR2_TOOLCHAIN_HAS_THREADS # libglib2
+	depends on BR2_USE_MMU # libglib2
+	select BR2_PACKAGE_LIBGLIB2
+	help
+	  RRDtool is the OpenSource industry standard, high performance
+	  data logging and graphing system for time series data.
+
+	  http://oss.oetiker.ch/rrdtool/
+
+if BR2_PACKAGE_RRDTOOL
+
+config BR2_PACKAGE_RRDTOOL_RRDGRAPH
+	bool "rrd_graph"
+	default y
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4 # pango -> harfbuzz
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 # pango -> harfbuzz
+	depends on BR2_INSTALL_LIBSTDCPP # freetype support from pango
+	select BR2_PACKAGE_CAIRO
+	select BR2_PACKAGE_CAIRO_PDF
+	select BR2_PACKAGE_CAIRO_PNG
+	select BR2_PACKAGE_CAIRO_PS
+	select BR2_PACKAGE_CAIRO_SVG
+	select BR2_PACKAGE_PANGO
+	help
+	  This enables the graphing capabilities ('rrdgraph').
+	  Without this it will only act as a database backend.
+
+comment "rrd_graph support needs a toolchain w/ C++, gcc >= 4.8"
+	depends on !BR2_INSTALL_LIBSTDCPP || \
+		!BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
+	depends on BR2_TOOLCHAIN_HAS_SYNC_4
+
+endif
+
+comment "rrdtool needs a toolchain w/ wchar, threads"
+	depends on BR2_USE_MMU
+	depends on !BR2_USE_WCHAR || !BR2_TOOLCHAIN_HAS_THREADS

package/rrdtool/rrdtool.hash

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+# Locally calculated
+sha256 a199faeb7eff7cafc46fac253e682d833d08932f3db93a550a4a5af180ca58db rrdtool-1.7.2.tar.gz
+sha256 ab6b4646e9e01f1ec287c29c351c886c4cb7f945c11efc0a1be9f6e5e6cc5320 COPYRIGHT
+sha256 d8c320ffc0030d1b096ae4732b50d2b811cf95e9a9b7377c1127b2563e0a0388 LICENSE

package/rrdtool/rrdtool.mk

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+################################################################################
+#
+# rrdtool
+#
+################################################################################
+
+RRDTOOL_VERSION = 1.7.2
+RRDTOOL_SITE = http://oss.oetiker.ch/rrdtool/pub
+RRDTOOL_LICENSE = GPL-2.0+ with FLOSS license exceptions as explained in COPYRIGHT
+RRDTOOL_LICENSE_FILES = COPYRIGHT LICENSE
+RRDTOOL_DEPENDENCIES = host-pkgconf libglib2 $(TARGET_NLS_DEPENDENCIES)
+# autoreconf needed to avoid link failure due to missing -lintl,
+# gettextize needed as a consequence of autoreconf
+RRDTOOL_AUTORECONF = YES
+RRDTOOL_GETTEXTIZE = YES
+RRDTOOL_INSTALL_STAGING = YES
+RRDTOOL_CONF_OPTS = \
+	--disable-examples \
+	--disable-libdbi \
+	--disable-librados \
+	--disable-libwrap \
+	--disable-lua \
+	--disable-perl \
+	--disable-python \
+	--disable-ruby \
+	--disable-tcl
+
+ifeq ($(BR2_PACKAGE_RRDTOOL_RRDGRAPH),y)
+RRDTOOL_DEPENDENCIES += cairo pango
+else
+RRDTOOL_CONF_OPTS += --disable-rrd_graph
+endif
+
+ifeq ($(BR2_PACKAGE_LIBXML2),y)
+RRDTOOL_DEPENDENCIES += libxml2
+else
+RRDTOOL_CONF_OPTS += --disable-rrd_restore
+endif
+
+$(eval $(autotools-package))