config BR2_PACKAGE_FMT bool "fmt" depends on BR2_INSTALL_LIBSTDCPP depends on BR2_USE_WCHAR help fmt is an open-source formatting library for C++. It can be used as a safe alternative to printf or as a fast alternative to IOStreams. https://fmt.dev comment "fmt needs a toolchain w/ C++, wchar" depends on !BR2_INSTALL_LIBSTDCPP || !BR2_USE_WCHAR