Build: Cleanup boost CMakeLists from pre-c++11 flag checks

dep/boost/CMakeLists.txt

@@ -12,8 +12,6 @@ if(WIN32)
   set(BOOST_DEBUG ON)
   if(DEFINED ENV{BOOST_ROOT})
     set(BOOST_ROOT $ENV{BOOST_ROOT})
-    list(APPEND BOOST_LIBRARYDIR
-      ${BOOST_ROOT}/lib${PLATFORM}-msvc-14.2 )
   endif()
 
   set(Boost_USE_STATIC_LIBS        ON)
@@ -38,20 +36,6 @@ if(NOT Boost_FOUND)
   endif()
 endif()
 
-# Find if Boost was compiled in C++03 mode because it requires -DBOOST_NO_CXX11_SCOPED_ENUMS
-
-set(CMAKE_REQUIRED_INCLUDES ${Boost_INCLUDE_DIR})
-set(CMAKE_REQUIRED_LIBRARIES ${Boost_SYSTEM_LIBRARY} ${Boost_FILESYSTEM_LIBRARY} ${Boost_IOSTREAMS_LIBRARY})
-set(CMAKE_REQUIRED_FLAGS "-std=c++11")
-check_cxx_source_compiles("
-  #include <boost/filesystem/path.hpp>
-  #include <boost/filesystem/operations.hpp>
-  int main() { boost::filesystem::copy_file(boost::filesystem::path(), boost::filesystem::path()); }"
-boost_filesystem_copy_links_without_NO_SCOPED_ENUM)
-unset(CMAKE_REQUIRED_INCLUDES)
-unset(CMAKE_REQUIRED_LIBRARIES)
-unset(CMAKE_REQUIRED_FLAGS)
-
 add_library(boost INTERFACE)
 
 target_link_libraries(boost
@@ -70,16 +54,6 @@ target_compile_definitions(boost
     -DBOOST_BIND_NO_PLACEHOLDERS
     -DBOOST_SYSTEM_USE_UTF8)
 
-if (NOT boost_filesystem_copy_links_without_NO_SCOPED_ENUM)
-  target_compile_definitions(boost
-    INTERFACE
-      -DBOOST_NO_CXX11_SCOPED_ENUMS)
-endif()
-
-target_compile_definitions(boost
-  INTERFACE
-    -DTC_HAS_BROKEN_WSTRING_REGEX)
-
 if (WITH_BOOST_STACKTRACE AND NOT WIN32)
   message("*** libbacktrace will be linked")
 

src/common/Utilities/Regex.h

@@ -18,15 +18,11 @@
 #ifndef TrinityCore_Regex_h__
 #define TrinityCore_Regex_h__
 
-#ifndef TC_HAS_BROKEN_WSTRING_REGEX
-#include <regex>
-#define TC_REGEX_NAMESPACE std
-#else
+// std::wregex doesn't work with patterns provided in db2 files
+// so we have to use boost
 #include <boost/regex.hpp>
 #define TC_REGEX_NAMESPACE boost
-#endif
 
-// regex compatibility layer, required for clang building with libstdc++-4.9
 namespace Trinity
 {
     using regex = TC_REGEX_NAMESPACE :: regex;