cxxopts: add new package

This is needed by microsocks11.

Signed-off-by: CN_SZTL <cnsztl@project-openwrt.eu.org>

package/ctcgfw/cxxopts/Makefile

@@ -0,0 +1,44 @@
+#
+# Copyright (C) 2021 CTCGFW Project-OpenWrt
+# (https://project-openwrt.eu.org)
+#
+# This is free software, licensed under the GNU General Public License v3.
+# See /LICENSE for more information.
+#
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=cxxopts
+PKG_VERSION:=2.2.1
+PKG_RELEASE:=1
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=https://codeload.github.com/jarro2783/cxxopts/tar.gz/v$(PKG_VERSION)?
+PKG_HASH:=984aa3c8917d649b14d7f6277104ce38dd142ce378a9198ec926f03302399681
+
+PKG_LICENSE:=MIT
+PKG_LICENSE_FILES:=LICENSE
+PKG_MAINTAINER:=CN_SZTL <cnsztl@project-openwrt.eu.org>
+
+PKG_BUILD_PARALLEL:=1
+CMAKE_INSTALL:=1
+
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/cmake.mk
+
+CMAKE_OPTIONS+= -DCXXOPTS_ENABLE_INSTALL=ON \
+	-DCXXOPTS_BUILD_EXAMPLES=OFF \
+	-DCXXOPTS_BUILD_TESTS=OFF
+
+define Package/cxxopts
+  SECTION:=lib
+  CATEGORY:=Libraries
+  URL:=https://github.com/jarro2783/cxxopts
+  TITLE:=Lightweight C++ command line option parser
+  DEPENDS:=+libc
+endef
+
+define Package/cxxopts/description
+  This is a lightweight C++ option parser library, supporting the standard GNU style syntax for options.
+endef
+
+$(eval $(call BuildPackage,cxxopts))