librsocket-cpp: Add new package librsocket-cpp

C++ implementation of RSocket
RSocket is a binary protocol for use on byte stream transports such as
TCP, WebSockets, and Aeron. (https://rsocket.io/)

This ships with two separte libraries, yarpl and rsocket

Patch 100 is already upstream
(862202c6e9).
Patch 101 in process of upstreaming as it needs to made compatible with
using both gold and ld.

[Dependency of https://github.com/facebook/openr]

Compile tested: openwrt master - nbg6817, arc700

Signed-off-by: Amol Bhave <ambhave@fb.com>

libs/librsocket-cpp/Makefile

@@ -0,0 +1,61 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=librsocket-cpp
+PKG_SOURCE_DATE:=2019-05-08
+PKG_SOURCE_VERSION:=ddc80392b17a3fadcbea09f82ea5f6936f0fd459
+PKG_RELEASE:=1
+
+PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=https://codeload.github.com/rsocket/rsocket-cpp/tar.gz/$(PKG_SOURCE_VERSION)?
+PKG_HASH:=b9b5177be57f6cd23ff3592845b11209167f679b683cb73acbf351e7a3550a76
+PKG_BUILD_DIR:=$(BUILD_DIR)/rsocket-cpp-$(PKG_SOURCE_VERSION)
+
+PKG_LICENSE:=Apache-2.0
+PKG_LICENSE_FILES:=LICENSE
+
+include $(INCLUDE_DIR)/package.mk
+include $(INCLUDE_DIR)/cmake.mk
+
+PKG_BUILD_PARALLEL:=1
+CMAKE_BINARY_SUBDIR:=builddir
+CMAKE_OPTIONS:= \
+	-DBUILD_BENCHMARKS=OFF \
+	-DBUILD_EXAMPLES=OFF \
+	-DBUILD_TESTS=OFF \
+	-DBUILD_SHARED_LIBS=ON
+CMAKE_INSTALL:=1
+
+define Package/librsocket-cpp
+	SECTION:=libs
+	CATEGORY:=Libraries
+	TITLE:=C++ implementation of RSocket
+	DEPENDS:=+libfolly +gflags +glog +libopenssl +libyarpl
+endef
+
+define Package/libyarpl
+	SECTION:=libs
+	CATEGORY:=Libraries
+	TITLE:=yarpl: Yet Another Reactive Programming Library
+	DEPENDS:=+libfolly +gflags +glog +libatomic
+endef
+
+define Package/librsocket-cpp/description
+	C++ implementation of RSocket, and Application protocol providing Reactive Streams semantics
+endef
+
+define Package/libyarpl/description
+	C++ implementation of reactive functional programming including both Observable and Flowable types.
+endef
+
+define Package/librsocket-cpp/install
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libReactiveSocket.so* $(1)/usr/lib/
+endef
+
+define Package/libyarpl/install
+	$(INSTALL_DIR) $(1)/usr/lib
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libyarpl*.so* $(1)/usr/lib/
+endef
+
+$(eval $(call BuildPackage,librsocket-cpp))
+$(eval $(call BuildPackage,libyarpl))

libs/librsocket-cpp/patches/100-fix-momit-leaf-frame-pointer-error.patch

@@ -0,0 +1,16 @@
+diff --git a/yarpl/CMakeLists.txt b/yarpl/CMakeLists.txt
+--- a/yarpl/CMakeLists.txt       Fri May 03 07:45:18 2019 -0700
++++ b/yarpl/CMakeLists.txt       Tue May 07 02:03:23 2019 -0700
+@@ -21,7 +21,11 @@
+   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -Wno-unused-parameter")
+   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-weak-vtables -Wno-padded")
+   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-omit-frame-pointer")
+-  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -momit-leaf-frame-pointer")
++  include(CheckCXXCompilerFlag)
++  CHECK_CXX_COMPILER_FLAG("-momit-leaf-frame-pointer" HAVE_OMIT_LEAF_FRAME_POINTER)
++  if(HAVE_OMIT_LEAF_FRAME_POINTER)
++    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -momit-leaf-frame-pointer")
++  endif()
+ endif()
+
+ if(YARPL_WRAP_SHARED_IN_LOCK)

libs/librsocket-cpp/patches/101-do-not-use-gold.patch

@@ -0,0 +1,11 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -67,7 +67,6 @@
+   if (RSOCKET_ASAN)
+     set(ASAN_FLAGS -fsanitize=address,undefined)
+   endif ()
+-  set(EXTRA_LINK_FLAGS ${EXTRA_LINK_FLAGS} -fuse-ld=gold)
+
+ elseif (${CMAKE_CXX_COMPILER_ID} MATCHES Clang)
+   if (RSOCKET_ASAN)