snmppp: add option to enable logging

SNMP++ logging can be overly verbose, and according to the SNMP++
documentation, disabling logging "increases performance drastically and
minimizes memory consumption".

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/snmppp/Config.in

@@ -8,5 +8,16 @@ config BR2_PACKAGE_SNMPPP
 
 	  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".
+
+endif
+
 comment "snmp++ needs a toolchain w/ threads, C++"
 	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS

package/snmppp/snmppp.mk

@@ -11,6 +11,7 @@ SNMPPP_DEPENDENCIES = openssl host-pkgconf
 SNMPPP_INSTALL_STAGING = YES
 # no configure script in tarball
 SNMPPP_AUTORECONF = YES
+SNMPPP_CONF_OPT = $(if $(BR2_PACKAGE_SNMPPP_LOGGING),--enable-logging,--disable-logging)
 SNMPPP_LICENSE = SNMP++
 SNMPPP_LICENSE_FILES = src/v3.cpp