readsb: new package

This package is based on dump1090-fa with many modifications. A big
advantage over dump1090-fa is that it can connect to multiple services
like adsbexchange, piaware or fr24feed.

As the idea for this package is mostly to feed other services, the HTML
files to serve via a webserver have not been included. The service(s)
that will be fed by readsb can offer such a webpage instead.

Finally, the init script does not use local variables, as local is
undefined in POSIX.

Signed-off-by: Stijn Tintel <stijn@linux-ipv6.be>

utils/readsb/Makefile

@@ -0,0 +1,73 @@
+# Copyright (C) 2020 Stijn Tintel <stijn@linux-ipv6.be>
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=readsb
+PKG_VERSION:=3.8.3
+PKG_RELEASE:=1
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=https://codeload.github.com/Mictronics/readsb/tar.gz/v$(PKG_VERSION)?
+PKG_HASH:=bf59b8ecd0ff66945b210c55a5b824aa63ff8cbb1704249528d30a4902e716b2
+
+PKG_LICENSE:=GPL-3.0-or-later
+PKG_LICENSE_FILES:=COPYING LICENSE
+
+PKG_MAINTAINER:=Stijn Tintel <stijn@linux-ipv6.be>
+
+PKG_BUILD_DEPENDS:=!USE_GLIBC:argp-standalone
+PKG_BUILD_PARALLEL:=1
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/readsb/default
+  SECTION:=utils
+  CATEGORY:=Utilities
+  DEPENDS:=+libncurses
+  TITLE:=Mode-S/ADSB/TIS decoder for various devices
+  URL:=https://github.com/Mictronic/readsb
+endef
+
+define Package/readsb
+  $(call Package/readsb/default)
+  TITLE+= (readsb)
+  DEPENDS+=+librtlsdr
+endef
+
+define Package/viewadsb
+  $(call Package/readsb/default)
+  TITLE+= (viewadsb)
+endef
+
+MAKE_FLAGS += \
+	BLADERF=no \
+	CFLAGS="$(TARGET_CFLAGS)" \
+	RTLSDR=yes \
+	UNAME="Linux"
+
+TARGET_CFLAGS += -ffunction-sections -fdata-sections -flto
+TARGET_LDFLAGS += \
+	$(if $(CONFIG_LIBC_USE_GLIBC),,-largp) \
+	-Wl,--gc-sections,--as-needed
+
+define Package/readsb/conffiles
+/etc/config/readsb
+endef
+
+define Package/readsb/install
+	$(INSTALL_DIR) $(1)/etc/{config,init.d} $(1)/usr/bin
+	$(INSTALL_CONF) ./files/readsb.config $(1)/etc/config/readsb
+	$(INSTALL_BIN) ./files/readsb.init $(1)/etc/init.d/readsb
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/readsb $(1)/usr/bin
+endef
+
+define Package/viewadsb/install
+	$(INSTALL_DIR) $(1)/usr/bin
+	$(INSTALL_BIN) $(PKG_BUILD_DIR)/viewadsb $(1)/usr/bin
+endef
+
+$(eval $(call BuildPackage,readsb))
+$(eval $(call BuildPackage,viewadsb))