nghttp2: add libnghttp2 package

The nghttp2 library is an implementation of the Hypertext Transfer
Protocol version 2 in C; it supports RFC7540 and RFC7541.
The package enables only the reusable C library; binary size is 130K (X86)

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

package/libs/nghttp2/Makefile

@@ -0,0 +1,47 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=nghttp2
+PKG_VERSION:=1.26.0
+PKG_RELEASE:=1
+PKG_SOURCE_URL:=https://github.com/nghttp2/nghttp2.git
+PKG_SOURCE_PROTO:=git
+PKG_SOURCE_VERSION:=0389af5724010627e19425237e9e5e0bf343bc6f
+PKG_SOURCE_DIR:=$(PKG_NAME)
+PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_MIRROR_HASH:=e7d6d6239cb5a6957b9aafe22a15ea01fafefdf472eff84ec959bb31c5023f79
+PKG_LICENSE:=MIT
+PKG_LICENSE_FILES:=COPYING
+CMAKE_INSTALL:=1
+
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/cmake.mk
+
+define Package/libnghttp2
+  SECTION:=libs
+  CATEGORY:=Libraries
+  TITLE:=Library implementing the framing layer of HTTP/2
+  MAINTAINER:=Hans Dedecker <dedeckeh@gmail.com>
+endef
+
+define Package/libnghttp2/description
+ C library implementing the framing layer of the HTTP/2 protocol. It can be used to build a HTTP/2-capable HTTP client or server
+endef
+
+CMAKE_OPTIONS += \
+        -DENABLE_LIB_ONLY=ON
+
+define Build/InstallDev
+	$(INSTALL_DIR) $(1)/usr/include/nghttp2
+	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/include/nghttp2/*.h $(1)/usr/include/nghttp2/
+	$(INSTALL_DIR) $(1)/usr/lib/pkgconfig
+	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/lib/pkgconfig/*.pc $(1)/usr/lib/pkgconfig/
+	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/lib/libnghttp2.so* $(1)/usr/lib/
+endef
+
+define Package/libnghttp2/install
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(INSTALL_DATA) $(PKG_INSTALL_DIR)/usr/lib/libnghttp2.so* $(1)/usr/lib
+endef
+
+$(eval $(call BuildPackage,libnghttp2))