Merge pull request microsoft#465 from fcharlie/master

fix build on linux use clang

Author: ras0219-msft

Release/CMakeLists.txt

@@ -136,6 +136,11 @@ if(CMAKE_CXX_COMPILER_ID MATCHES "Clang" OR IOS)
   if(ANDROID)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-pedantic")
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-attributes -Wno-pointer-arith")
+  elseif(CMAKE_SYSTEM_NAME MATCHES "Linux")
+    set(WARNINGS -Wall -Wextra -Wcast-qual -Wconversion -Wformat=2 -Winit-self -Winvalid-pch -Wmissing-format-attribute -Wmissing-include-dirs -Wpacked -Wredundant-decls)
+    set(LINUX_SUPPRESSIONS -Wno-overloaded-virtual -Wno-sign-conversion -Wno-deprecated -Wno-unknown-pragmas -Wno-reorder -Wno-char-subscripts -Wno-switch -Wno-unused-parameter -Wno-unused-variable -Wno-deprecated -Wno-unused-value -Wno-unknown-warning-option -Wno-return-type-c-linkage -Wno-unused-function -Wno-sign-compare -Wno-shorten-64-to-32 -Wno-reorder -Wno-unused-local-typedefs)
+    set(WARNINGS ${WARNINGS} ${LINUX_SUPPRESSIONS})
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-return-type-c-linkage -Wno-unneeded-internal-declaration")
   else()
     set(WARNINGS -Wall -Wextra -Wcast-qual -Wconversion -Wformat=2 -Winit-self -Winvalid-pch -Wmissing-format-attribute -Wmissing-include-dirs -Wpacked -Wredundant-decls)
     set(OSX_SUPPRESSIONS -Wno-overloaded-virtual -Wno-sign-conversion -Wno-deprecated -Wno-unknown-pragmas -Wno-reorder -Wno-char-subscripts -Wno-switch -Wno-unused-parameter -Wno-unused-variable -Wno-deprecated -Wno-unused-value -Wno-unknown-warning-option -Wno-return-type-c-linkage -Wno-unused-function -Wno-sign-compare -Wno-shorten-64-to-32 -Wno-reorder -Wno-unused-local-typedefs)

Release/libs/websocketpp/CMakeLists.txt

@@ -135,7 +135,11 @@ if (BUILD_TESTS OR BUILD_EXAMPLES)
         endif()
         set (WEBSOCKETPP_PLATFORM_TSL_LIBS ssl crypto)
         set (WEBSOCKETPP_BOOST_LIBS system thread)
-        set (CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-std=c++0x -stdlib=libc++") # todo: is libc++ really needed here?
+        if(CMAKE_SYSTEM_NAME MATCHES "Linux")
+          set (CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-std=c++0x")
+        else()
+          set (CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-std=c++0x -stdlib=libc++") # todo: is libc++ really needed here?
+        endif()
         if (NOT APPLE)
             add_definitions (-DNDEBUG -Wall -Wno-padded) # todo: should we use CMAKE_C_FLAGS for these?
         endif ()
@@ -241,4 +245,3 @@ install (FILES
   "${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/websocketpp-config.cmake"
   "${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/websocketpp-configVersion.cmake"
   DESTINATION "${INSTALL_CMAKE_DIR}" COMPONENT dev)
-