Fix g++ on MacOS compilation error

Author: stephen-webb

src/main/cpp/logstream.cpp

@@ -41,7 +41,7 @@ logstream_base::logstream_ios_base::logstream_ios_base(std::ios_base::fmtflags i
 	memset(this, 0, sizeof(*this));
 #endif
 #if LOG4CXX_INIT_IOS_BASE
-	std::ios_base::Init{};
+	init(NULL);
 #endif
 	flags(initval);
 	precision(initsize);

src/main/include/CMakeLists.txt

@@ -39,8 +39,10 @@ option(LOG4CXX_WCHAR_T "Enable wchar_t API methods" ON)
 option(LOG4CXX_UNICHAR "Enable UniChar API methods" OFF)
 set(INIT_IOS_BASE 0)
 if(APPLE)
-option(LOG4CXX_CFSTRING "Enable CFString API methods, requires Mac OS/X CoreFoundation" OFF)
-set(INIT_IOS_BASE 1)
+  option(LOG4CXX_CFSTRING "Enable CFString API methods, requires Mac OS/X CoreFoundation" OFF)
+  if("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
+    set(INIT_IOS_BASE 1)
+  endif()
 endif()
 set(CHAR_API 1)
 foreach(varName WCHAR_T  UNICHAR  CFSTRING )