Integrate Adaptive link (#1742)

general/package/Config.in

@@ -1,3 +1,4 @@
+source "$BR2_EXTERNAL_GENERAL_PATH/package/adaptive-link/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/aic8800-openipc/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/allwinner-osdrv-v83x/Config.in"
 source "$BR2_EXTERNAL_GENERAL_PATH/package/allwinner-osdrv-v85x/Config.in"

general/package/adaptive-link/Config.in

@@ -0,0 +1,5 @@
+config BR2_PACKAGE_ADAPTIVE_LINK
+	bool "Adaptive link (not enabled by default)"
+	help
+	  Controls the bitrate and other link parameters depending on the link quality.
+	  https://github.com/OpenIPC/adaptive-link

general/package/adaptive-link/adaptive-link.mk

@@ -0,0 +1,34 @@
+################################################################################
+#
+# Adaptive Link
+#
+################################################################################
+
+ADAPTIVE_LINK_SITE = $(call github,openipc,adaptive-link,$(ADAPTIVE_LINK_VERSION))
+ADAPTIVE_LINK_VERSION = 'd4b8ec142a0566f2c1fd302bccaef77ca1f5817c'
+
+ADAPTIVE_LINK_LICENSE = GPL-3.0
+ADAPTIVE_LINK_LICENSE_FILES = LICENSE
+
+
+ifeq ($(BR2_TOOLCHAIN_USES_GLIBC),y)
+	ADAPTIVE_LINK_OPTIONS = "-rdynamic -s -Os -lm"
+else
+	ADAPTIVE_LINK_OPTIONS = "-rdynamic -s -Os"
+endif
+
+define ADAPTIVE_LINK_BUILD_CMDS
+	@echo "Building Adaptive link"
+	$(MAKE) CC=$(TARGET_CC) OPT=$(ADAPTIVE_LINK_OPTIONS) -C $(@D)
+endef
+
+define ADAPTIVE_LINK_INSTALL_TARGET_CMDS
+	$(INSTALL) -m 755 -d $(TARGET_DIR)/etc
+	$(INSTALL) -m 755 -d $(TARGET_DIR)/usr/bin
+
+	$(INSTALL) -m 644 -t $(TARGET_DIR)/etc $(@D)/alink.conf
+	$(INSTALL) -m 644 -t $(TARGET_DIR)/etc $(@D)/txprofiles.conf
+	$(INSTALL) -m 755 -t $(TARGET_DIR)/usr/bin $(@D)/alink_drone
+endef
+
+$(eval $(generic-package))