initial buildroot for linux 5.15

package/snmppp/Config.in

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+config BR2_PACKAGE_SNMPPP
+	bool "snmp++"
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_TOOLCHAIN_HAS_THREADS
+	depends on !BR2_STATIC_LIBS
+	help
+	  SNMP++v3.x is a C++ API which supports SNMP v1, v2c, and v3.
+
+	  http://www.agentpp.com/snmp_pp3_x/snmp_pp3_x.html
+
+if BR2_PACKAGE_SNMPPP
+
+config BR2_PACKAGE_SNMPPP_LOGGING
+	bool "enable logging"
+	help
+	  Enable logging output for SNMP++.
+	  According to the SNMP++ documentation, disabling logging
+	  "increases performance drastically and minimizes memory
+	  consumption".
+
+config BR2_PACKAGE_SNMPPP_SNMPV3
+	bool "enable SNMPv3"
+	default y
+	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_8 # C++11
+	select BR2_PACKAGE_OPENSSL
+	select BR2_PACKAGE_LIBOPENSSL_ENABLE_DES if BR2_PACKAGE_LIBOPENSSL
+	help
+	  Enable optional support for SNMP++. This selects OpenSSL.
+
+comment "SNMPv3 needs a toolchain w/ gcc >= 4.8"
+	depends on !BR2_TOOLCHAIN_GCC_AT_LEAST_4_8
+
+endif
+
+comment "snmp++ needs a toolchain w/ threads, C++, dynamic library"
+	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS || \
+		BR2_STATIC_LIBS

package/snmppp/snmppp.hash

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+# Locally computed:
+sha256  a3eb75e2310c315d9b2c2094154c7cd9b46684adb80a4b36b8957dcc09af4041  snmp++-3.4.2.tar.gz
+sha256  f6fd4321c7eb6e51a272f91f964aea7f53039bb2b55f690d5a9d042f3a5d79b9  src/v3.cpp

package/snmppp/snmppp.mk

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+################################################################################
+#
+# snmppp
+#
+################################################################################
+
+SNMPPP_VERSION = 3.4.2
+SNMPPP_SOURCE = snmp++-$(SNMPPP_VERSION).tar.gz
+SNMPPP_SITE = http://www.agentpp.com/download
+SNMPPP_DEPENDENCIES = host-pkgconf
+SNMPPP_INSTALL_STAGING = YES
+SNMPPP_CONF_OPTS = $(if $(BR2_PACKAGE_SNMPPP_LOGGING),--enable-logging,--disable-logging)
+SNMPPP_LICENSE = SNMP++
+SNMPPP_LICENSE_FILES = src/v3.cpp
+
+ifeq ($(BR2_PACKAGE_SNMPPP_SNMPV3),y)
+SNMPPP_CONF_ENV += CXXFLAGS="$(TARGET_CXXFLAGS) -std=c++11"
+SNMPPP_CONF_OPTS += --enable-snmpv3
+SNMPPP_DEPENDENCIES += openssl
+else
+SNMPPP_CONF_OPTS += --disable-snmpv3
+endif
+
+$(eval $(autotools-package))