config BR2_PACKAGE_LIBSIGC2
	bool "libsigc++ (2.x.x)"
	depends on BR2_TOOLCHAIN_GCC_AT_LEAST_4_9 # C++11
	depends on BR2_INSTALL_LIBSTDCPP
	help
	  libsigc++ implements a typesafe callback system for standard
	  C++. It allows you to define signals and to connect those
	  signals to any callback function, either global or a member
	  function, regardless of whether it is static or virtual.

	  This is the last version before the API and ABI change
	  introduced in 3.0.0 which requires C++17.

	  https://libsigcplusplus.github.io/libsigcplusplus/

comment "libsigc++ (2.x.x) needs a toolchain w/ C++, gcc >= 4.9"
	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_GCC_AT_LEAST_4_9