From df4d7167fdd568aa63169d6a948d857a8e62b35e Mon Sep 17 00:00:00 2001
From: Jonne Nauha <jonne.nauha@adminotech.com>
Date: Wed, 3 Apr 2013 01:56:10 +0300
Subject: [PATCH] CMake continued: Try to detect g++, clang, windows and osx
 and setup appropriate defines and build flags. Improve so that each setup can
 define platform, boost and ssl libs. I tried to copy everything that I could
 from the scons scripts, probably some of this can be removed (might be
 automated from cmake already), left todo:s for that. Added building simple
 examples, more to follow. NOTE: This has only been tested on windows.

---
 .gitignore                          |   3 +
 CMakeLists.txt                      | 129 ++++++++++++++++++++++++----
 cmake/CMakeHelpers.cmake            |  62 +++++++++++--
 examples/CMakeLists.txt             |  15 +---
 examples/echo_client/CMakeLists.txt |  11 +++
 examples/echo_server/CMakeLists.txt |  10 +++
 websocketpp/CMakeLists.txt          |  17 +---
 7 files changed, 198 insertions(+), 49 deletions(-)
 create mode 100644 examples/echo_client/CMakeLists.txt
 create mode 100644 examples/echo_server/CMakeLists.txt

diff --git a/.gitignore b/.gitignore
index 17581269e7..249c560a12 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,8 +31,11 @@ install_manifest.txt
 *.suo
 *.ncb
 */Debug/*
+*/*/Debug/*
 */Release/*
+*/*/Release/*
 */RelWithDebInfo/*
+*/*/RelWithDebInfo/*
 
 objs_shared/
 objs_static/
diff --git a/CMakeLists.txt b/CMakeLists.txt
index acc019cc77..70edccefb7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,6 @@
 
+############ Setup project and cmake
+
 # Project name
 project (websocketpp)
 
@@ -6,20 +8,98 @@ project (websocketpp)
 # cmake for the dependency find macros etc. to be up to date.
 cmake_minimum_required (VERSION 2.5)
 
-# Include our cmake macros
-set (CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} cmake)
-include (CMakeHelpers)
-
-# Build customization: 
-# - Override from command line "CMake -D<OPTION>=TRUE/FALSE/0/1". Remove CMakeCache.txt before the run.
-option (ENABLE_CPP11 "Build websocketpp with CPP11 features enabled." FALSE) # todo
-option (BUILD_EXAMPLES "Build websocketpp examples." FALSE)
-option (BUILD_TESTS "Build websocketpp tests." FALSE) # todo
+# Set CMake library search policy
+if (COMMAND cmake_policy)
+    cmake_policy (SET CMP0003 NEW)
+    cmake_policy (SET CMP0005 NEW)
+endif ()
 
 # Disable unnecessary build types
 set (CMAKE_CONFIGURATION_TYPES "Release;RelWithDebInfo;Debug" CACHE STRING "Configurations" FORCE)
 
-# Spesify useful paths
+# Include our cmake macros
+set (CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
+include (CMakeHelpers)
+
+
+############  Build customization
+
+# Override from command line "CMake -D<OPTION>=TRUE/FALSE/0/1"
+option (ENABLE_CPP11 "Build websocketpp with CPP11 features enabled." TRUE)
+option (BUILD_EXAMPLES "Build websocketpp examples." TRUE)
+option (BUILD_TESTS "Build websocketpp tests." FALSE)
+
+
+############ Compiler specific setup
+
+set (WEBSOCKETPP_PLATFORM_LIBS "")
+set (WEBSOCKETPP_PLATFORM_TSL_LIBS "")
+set (WEBSOCKETPP_BOOST_LIBS "")
+
+# VC9 and C++11 reasoning
+if (ENABLE_CPP11 AND MSVC AND MSVC90)
+    message("* Detected Visual Studio 9 2008, disabling C++11 support.")
+    set (ENABLE_CPP11 FALSE)        
+endif ()
+
+# Detect clang. Not officially reported by cmake.
+if ("${CMAKE_CXX_COMPILER} ${CMAKE_CXX_COMPILER_ARG1}" MATCHES ".*clang")
+    set (CMAKE_COMPILER_IS_CLANGXX 1)
+endif ()
+
+# C++11 defines
+if (ENABLE_CPP11)
+    add_definitions (-D_WEBSOCKETPP_CPP11_STL_)
+endif ()
+
+# Visual studio
+if (MSVC)
+    set (WEBSOCKETPP_BOOST_LIBS system thread regex)
+    set (CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /GL /Gy /GF /Ox /Ob2 /Ot /Oi /MP /arch:SSE2 /fp:fast")
+    set (CMAKE_SHARED_LINKER_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG /INCREMENTAL:NO /OPT:REF /OPT:ICF")
+    add_definitions (/W3 /wd4996 /wd4995 /wd4355)
+    add_definitions (-DUNICODE -D_UNICODE)
+    add_definitions (-D_CRT_SECURE_NO_WARNINGS -D_SCL_SECURE_NO_WARNINGS)
+    add_definitions (-DNOMINMAX)
+endif ()
+
+# g++
+if (CMAKE_COMPILER_IS_GNUCXX)
+    set (WEBSOCKETPP_PLATFORM_LIBS pthread rt)
+    set (WEBSOCKETPP_PLATFORM_TSL_LIBS ssl crypto)
+    set (WEBSOCKETPP_BOOST_LIBS system thread)
+    set (CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-std=c++0x")
+    if (NOT APPLE)
+        add_definitions (-DNDEBUG -Wall -Wcast-align) # todo: should we use CMAKE_C_FLAGS for these?
+    endif ()
+
+    # Try to detect version. Note: Not tested!
+    execute_process (COMMAND ${CMAKE_CXX_COMPILER} "-dumpversion" OUTPUT_VARIABLE GCC_VERSION)
+    if ("${GCC_VERSION}" STRGREATER "4.4.0")
+        message("* C++11 support partially enabled due to GCC version ${GCC_VERSION}")
+        set (WEBSOCKETPP_BOOST_LIBS system thread regex)
+        add_definitions (-D_WEBSOCKETPP_NO_CPP11_REGEX_)
+    endif ()
+endif ()
+
+# clang
+if (CMAKE_COMPILER_IS_CLANGXX)
+    set (WEBSOCKETPP_PLATFORM_LIBS pthread rt)
+    set (WEBSOCKETPP_PLATFORM_TSL_LIBS ssl crypto)
+    set (CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "-std=c++0x -stdlib=libc++") # todo: is libc++ really needed here?
+    if (NOT APPLE)
+        add_definitions (-DNDEBUG -Wall -Wno-padded) # todo: should we use CMAKE_C_FLAGS for these?
+    endif ()
+endif ()
+
+# OSX, can override above.
+if (APPLE)
+    add_definitions (-DNDEBUG -Wall -O0)
+endif ()
+
+
+############ Paths
+
 set (WEBSOCKETPP_ROOT ${CMAKE_CURRENT_SOURCE_DIR})
 set (WEBSOCKETPP_BIN ${WEBSOCKETPP_ROOT}/bin)
 set (WEBSOCKETPP_LIB ${WEBSOCKETPP_ROOT}/lib)
@@ -27,16 +107,26 @@ set (WEBSOCKETPP_INCLUDE ${WEBSOCKETPP_ROOT}/websocketpp)
 set (WEBSOCKETPP_PREFIX ${WEBSOCKETPP_ROOT}/build)
 
 # CMake install step prefix. I assume linux users want the prefix to 
-# be the default usr so this is only adjusted on Windows.
-# How to invoke:
+# be the default /usr or /usr/local so this is only adjusted on Windows.
 # - Windows: Build the INSTALL project in your solution file.
 # - Linux/OSX: make install.
 if (MSVC)
 	set (CMAKE_INSTALL_PREFIX ${WEBSOCKETPP_PREFIX})
 endif ()
 
-# Find and configure Boost dependency. You should define BOOST_ROOT environment variable or
-# pass it to cmake with -DBOOST_ROOT=path. CMake variable BOOST_ROOT can be defined at this stage by -D or from cache.
+
+############ Dependencies
+
+# Set BOOST_ROOT env variable or pass with cmake -DBOOST_ROOT=path.
+# BOOST_ROOT can also be defined by a previous run from cmake cache.
+if (NOT "$ENV{BOOST_ROOT_CPP11}" STREQUAL "")
+    # Scons documentation for BOOST_ROOT_CPP11:
+    # "look for optional second boostroot compiled with clang's libc++ STL library
+    # this prevents warnings/errors when linking code built with two different
+    # incompatible STL libraries."
+    file (TO_CMAKE_PATH "$ENV{BOOST_ROOT_CPP11}" BOOST_ROOT)
+    set (BOOST_ROOT ${BOOST_ROOT} CACHE PATH "BOOST_ROOT dependency path" FORCE)
+endif ()
 if ("${BOOST_ROOT}" STREQUAL "")
     file (TO_CMAKE_PATH "$ENV{BOOST_ROOT}" BOOST_ROOT)
     # Cache BOOST_ROOT for runs that do not define $ENV{BOOST_ROOT}.
@@ -61,7 +151,7 @@ set (Boost_DEBUG FALSE)
 set (Boost_USE_MULTITHREADED TRUE)
 set (Boost_ADDITIONAL_VERSIONS "1.39.0" "1.40.0" "1.41.0" "1.42.0" "1.43.0" "1.44.0" "1.46.1") # todo: someone who knows better spesify these!
 
-find_package (Boost 1.39.0 COMPONENTS system thread regex) # todo: What do we need for each platform?
+find_package (Boost 1.39.0 COMPONENTS "${WEBSOCKETPP_BOOST_LIBS}")
 
 if (Boost_FOUND)
     # Boost is a project wide global dependency.
@@ -77,11 +167,18 @@ if (Boost_FOUND)
     foreach (library_dir ${Boost_LIBRARY_DIRS})
         message (STATUS "       " ${library_dir})
     endforeach ()
+    message (STATUS "-- Libraries")
+    foreach (boost_lib ${Boost_LIBRARIES})
+        message (STATUS "       " ${boost_lib})
+    endforeach ()
     message ("")
 else ()
     message (FATAL_ERROR "Failed to find required dependency: boost")
 endif ()
 
+
+############ Add projects
+
 # Add main library
 add_subdirectory (websocketpp)
 
@@ -94,3 +191,5 @@ endif ()
 if (BUILD_TESTS)
     add_subdirectory (test)
 endif ()
+
+print_used_build_config()
diff --git a/cmake/CMakeHelpers.cmake b/cmake/CMakeHelpers.cmake
index 947f6aa7b3..d3ed20d0d5 100644
--- a/cmake/CMakeHelpers.cmake
+++ b/cmake/CMakeHelpers.cmake
@@ -1,4 +1,22 @@
 
+# Print build configuration
+macro (print_used_build_config)
+    message ("\n=========== Used Build Configuration =============\n")
+    message (STATUS "ENABLE_CPP11        = " ${ENABLE_CPP11})
+    message (STATUS "BUILD_EXAMPLES      = " ${BUILD_EXAMPLES})
+    message (STATUS "BUILD_TESTS         = " ${BUILD_TESTS})
+    message ("")
+    message (STATUS "WEBSOCKETPP_ROOT    = " ${WEBSOCKETPP_ROOT})
+    message (STATUS "WEBSOCKETPP_BIN     = " ${WEBSOCKETPP_BIN})
+    message (STATUS "WEBSOCKETPP_LIB     = " ${WEBSOCKETPP_LIB})
+    message (STATUS "Install prefix      = " ${CMAKE_INSTALL_PREFIX})
+    message ("")
+    message (STATUS "WEBSOCKETPP_BOOST_LIBS        = ${WEBSOCKETPP_BOOST_LIBS}")
+    message (STATUS "WEBSOCKETPP_PLATFORM_LIBS     = ${WEBSOCKETPP_PLATFORM_LIBS}")
+    message (STATUS "WEBSOCKETPP_PLATFORM_TSL_LIBS = ${WEBSOCKETPP_PLATFORM_TSL_LIBS}")
+    message ("") 
+endmacro ()
+
 # Lists all subdirectories to the RESULT variable.
 macro (list_subdirectories RESULT curdir)
     set (_TEMP_DIRLIST "")
@@ -11,9 +29,21 @@ macro (list_subdirectories RESULT curdir)
     set (${RESULT} ${_TEMP_DIRLIST})
 endmacro ()
 
+# Adds the given folder_name into the source files of the current project. 
+# Use this macro when your module contains .cpp and .h files in several subdirectories.
+# Your sources variable needs to be SOURCE_FILES and headers variable HEADER_FILES.
+macro(add_source_folder folder_name)
+    file(GLOB H_FILES_IN_FOLDER_${folder_name} ${folder_name}/*.hpp ${folder_name}/*.h)
+    file(GLOB CPP_FILES_IN_FOLDER_${folder_name} ${folder_name}/*.cpp ${folder_name}/*.c)
+    source_group("Header Files\\${folder_name}" FILES ${H_FILES_IN_FOLDER_${folder_name}})
+    source_group("Source Files\\${folder_name}" FILES ${CPP_FILES_IN_FOLDER_${folder_name}})
+    set(HEADER_FILES ${HEADER_FILES} ${H_FILES_IN_FOLDER_${folder_name}})
+    set(SOURCE_FILES ${SOURCE_FILES} ${CPP_FILES_IN_FOLDER_${folder_name}})
+endmacro()
+
 # Initialize target.
 macro (init_target NAME)
-    set (TARGET_NAME ${NAME})   
+    set (TARGET_NAME ${NAME})
     message ("** " ${TARGET_NAME})
     
     # Include our own module path. This makes #include "x.h" 
@@ -21,18 +51,19 @@ macro (init_target NAME)
     include_directories (${CMAKE_CURRENT_SOURCE_DIR})
 endmacro ()
 
+# Build library for static and shared libraries
 macro (build_library TARGET_NAME LIB_TYPE)
-    # STATIC or SHARED
     set (TARGET_LIB_TYPE ${LIB_TYPE})
-
     message (STATUS "-- Build Type:")
     message (STATUS "       " ${TARGET_LIB_TYPE} " library")
    
     add_library (${TARGET_NAME} ${TARGET_LIB_TYPE} ${ARGN})
 
+    target_link_libraries (${TARGET_NAME} ${WEBSOCKETPP_PLATFORM_LIBS})
+
     if (MSVC)
         if (${TARGET_LIB_TYPE} STREQUAL "SHARED")
-            set_target_properties (${TARGET_NAME} PROPERTIES LINK_FLAGS_RELEASE "${CMAKE_SHARED_LINKER_FLAGS_RELEASE} /LTCG /INCREMENTAL:NO /OPT:REF /OPT:ICF")
+            set_target_properties (${TARGET_NAME} PROPERTIES LINK_FLAGS_RELEASE ${CMAKE_SHARED_LINKER_FLAGS_RELEASE})
         else ()
             set_target_properties (${TARGET_NAME} PROPERTIES STATIC_LIBRARY_FLAGS_RELEASE "/LTCG")
         endif ()
@@ -45,14 +76,23 @@ macro (build_library TARGET_NAME LIB_TYPE)
     endif ()
 
     set_target_properties (${TARGET_NAME} PROPERTIES DEBUG_POSTFIX d)
-endmacro (build_library)
+endmacro ()
 
+# Build executable for executables
 macro (build_executable TARGET_NAME)
     set (TARGET_LIB_TYPE "EXECUTABLE")
-    add_executable (${TARGET_NAME} ${ARGN})
-    set_target_properties (${TARGET_NAME} PROPERTIES DEBUG_POSTFIX d)
-endmacro (build_executable)
+    message (STATUS "-- Build Type:")
+    message (STATUS "       " ${TARGET_LIB_TYPE})
 
+    add_executable (${TARGET_NAME} ${ARGN})
+
+    include_directories (${WEBSOCKETPP_ROOT} ${WEBSOCKETPP_INCLUDE})
+
+    set_target_properties (${TARGET_NAME} PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${WEBSOCKETPP_BIN})
+    set_target_properties (${TARGET_NAME} PROPERTIES DEBUG_POSTFIX d)
+endmacro ()
+
+# Finalize target for all types
 macro (final_target)
     if (${TARGET_LIB_TYPE} STREQUAL "SHARED")
         install (TARGETS ${TARGET_NAME} 
@@ -83,4 +123,8 @@ macro (final_target)
 
     # Pretty printing
     message ("")
-endmacro (final_target)
\ No newline at end of file
+endmacro ()
+
+macro (link_boost)
+    target_link_libraries (${TARGET_NAME} ${Boost_LIBRARIES})
+endmacro ()
\ No newline at end of file
diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt
index ebe7d64e3c..5dd4873a67 100644
--- a/examples/CMakeLists.txt
+++ b/examples/CMakeLists.txt
@@ -1,17 +1,8 @@
 
+# Roams all subdirs for CMakeLists.txt
 list_subdirectories(SUBDIRS ${CMAKE_CURRENT_SOURCE_DIR})
 foreach (SUBDIR ${SUBDIRS})
-    # Check if this folder has source/header files
-    file (GLOB SOURCE_FILES ${SUBDIR}/*.cpp)
-    file (GLOB HEADER_FILES ${SUBDIR}/*.hpp)
-    list (LENGTH SOURCE_FILES SRC_LEN)
-    list (LENGTH HEADER_FILES H_LEN)
-    if (NOT SRC_LEN EQUAL 0 OR NOT H_LEN EQUAL 0)
-        init_target (${SUBDIR})
-        build_executable (${TARGET_NAME} ${SOURCE_FILES} ${HEADER_FILES})
-        include_directories (${WEBSOCKETPP_ROOT} ${WEBSOCKETPP_INCLUDE})
-        link_directories (${WEBSOCKETPP_LIB})
-        target_link_libraries (${TARGET_NAME} optimized libwebsocketpp debug libwebsocketppd)
-        final_target ()
+    if (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${SUBDIR}/CMakeLists.txt")
+        add_subdirectory (${SUBDIR})
     endif ()
 endforeach ()
diff --git a/examples/echo_client/CMakeLists.txt b/examples/echo_client/CMakeLists.txt
new file mode 100644
index 0000000000..a3d6d3b2e5
--- /dev/null
+++ b/examples/echo_client/CMakeLists.txt
@@ -0,0 +1,11 @@
+    
+file (GLOB SOURCE_FILES *.cpp)
+file (GLOB HEADER_FILES *.hpp)
+
+init_target (echo_client)
+
+build_executable (${TARGET_NAME} ${SOURCE_FILES} ${HEADER_FILES})
+
+link_boost ()
+final_target ()
+
diff --git a/examples/echo_server/CMakeLists.txt b/examples/echo_server/CMakeLists.txt
new file mode 100644
index 0000000000..adacc6aa76
--- /dev/null
+++ b/examples/echo_server/CMakeLists.txt
@@ -0,0 +1,10 @@
+    
+file (GLOB SOURCE_FILES *.cpp)
+file (GLOB HEADER_FILES *.hpp)
+
+init_target (echo_server)
+
+build_executable (${TARGET_NAME} ${SOURCE_FILES} ${HEADER_FILES})
+
+link_boost ()
+final_target ()
diff --git a/websocketpp/CMakeLists.txt b/websocketpp/CMakeLists.txt
index 614917d671..908ed73b6a 100644
--- a/websocketpp/CMakeLists.txt
+++ b/websocketpp/CMakeLists.txt
@@ -6,23 +6,14 @@ file (GLOB SOURCE_FILES *.cpp)
 file (GLOB HEADER_FILES *.hpp)
 
 # Sources from subdirectories.
-# todo: Make this generate source groups in visual 
-# studio solutions for a cleaner looking project.
-list_subdirectories(SUBDIRS ${CMAKE_CURRENT_SOURCE_DIR})
+list_subdirectories (SUBDIRS ${CMAKE_CURRENT_SOURCE_DIR})
 foreach (SUBDIR ${SUBDIRS})
-    file (GLOB SUBDIR_SOURCE_FILES ${SUBDIR}/*.cpp ${SUBDIR}/*.c)
-    file (GLOB SUBDIR_HEADER_FILES ${SUBDIR}/*.hpp ${SUBDIR}/*.h)
-    # Filter out certain files from 3rd party code
-    if (NOT ${SUBDIR} STREQUAL "sha1" AND NOT ${SUBDIR} STREQUAL "md5")
-        set (SOURCE_FILES ${SOURCE_FILES} ${SUBDIR_SOURCE_FILES})
+    # Filter out certain subdirs from 3rd party code
+    if (NOT ${SUBDIR} STREQUAL "sha1" AND NOT ${SUBDIR} STREQUAL "md5") # todo: AND NOT ${SUBDIR} STREQUAL "base64"
+        add_source_folder (${SUBDIR})
     endif ()
-    set (HEADER_FILES ${HEADER_FILES} ${SUBDIR_HEADER_FILES})
 endforeach ()
 
-# In preparation for building as dynamic lib on windows.
-# This should probably be supported at some point.
-# add_definitions (-DWEBSOCKETPP_MODULE_EXPORTS)
-
 build_library (${TARGET_NAME} STATIC ${SOURCE_FILES} ${HEADER_FILES})
 
 final_target ()
\ No newline at end of file