initial buildroot for linux 5.15

package/riemann-c-client/Config.in

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+config BR2_PACKAGE_RIEMANN_C_CLIENT
+	bool "riemann-c-client"
+	depends on BR2_INSTALL_LIBSTDCPP # protobuf-c
+	depends on BR2_TOOLCHAIN_HAS_THREADS # protobuf-c
+	depends on BR2_HOSTARCH = "x86_64" || BR2_HOSTARCH = "x86" # protobuf-c
+	select BR2_PACKAGE_PROTOBUF_C
+	help
+	  Riemann-c-client is a C client library for the Riemann
+	  monitoring system, providing a convenient and simple API,
+	  high test coverage and a copyleft license, along with API
+	  and ABI stability.
+
+	  https://github.com/algernon/riemann-c-client
+
+comment "riemann-c-client needs a toolchain w/ C++, threads"
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS
+	depends on BR2_HOSTARCH = "x86_64" || BR2_HOSTARCH = "x86"

package/riemann-c-client/riemann-c-client.hash

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+# Locally calculated
+sha256 334874f0b9a507a8abbc7138df719cba4f28f12c02c39d5e55090b8edb86f9d2 riemann-c-client-1.10.4.tar.gz
+sha256 da7eabb7bafdf7d3ae5e9f223aa5bdc1eece45ac569dc21b3b037520b4464768 LICENSE

package/riemann-c-client/riemann-c-client.mk

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+################################################################################
+#
+# riemann-c-client
+#
+################################################################################
+
+RIEMANN_C_CLIENT_VERSION = 1.10.4
+RIEMANN_C_CLIENT_SITE = \
+	$(call github,algernon,riemann-c-client,riemann-c-client-$(RIEMANN_C_CLIENT_VERSION))
+RIEMANN_C_CLIENT_LICENSE = LGPL-3.0+
+RIEMANN_C_CLIENT_LICENSE_FILES = LICENSE
+RIEMANN_C_CLIENT_INSTALL_STAGING = YES
+RIEMANN_C_CLIENT_MAKE = $(MAKE1)
+# From git
+RIEMANN_C_CLIENT_AUTORECONF = YES
+RIEMANN_C_CLIENT_DEPENDENCIES = \
+	host-pkgconf protobuf-c \
+	$(if $(BR2_PACKAGE_GNUTLS),gnutls) \
+	$(if $(BR2_PACKAGE_JSON_C),json-c)
+
+$(eval $(autotools-package))