[CMAKE/GCC] Prevent GCC from searching any of the default directories, except when we're dealing with set_cpp. Now GCC build is on par with the MSVC build in terms of header inclusions.

svn path=/trunk/; revision=66707

reactos/cmake/CMakeMacros.cmake

@@ -72,6 +72,8 @@ macro(set_cpp)
         if(MSVC)
             add_definitions(-DNATIVE_CPP_INCLUDE=${REACTOS_SOURCE_DIR}/include/c++)
             include_directories(${REACTOS_SOURCE_DIR}/include/c++/stlport)
+        else()
+            replace_compile_flags("-nostdinc" " ")
         endif()
     endif()
 

reactos/cmake/gcc.cmake

@@ -38,6 +38,10 @@ endif()
 
 # Compiler Core
 add_compile_flags("-pipe -fms-extensions -fno-strict-aliasing")
+
+# Prevent GCC from searching any of the default directories
+add_compile_flags("-nostdinc")
+
 if(GCC_VERSION VERSION_GREATER 4.7)
     add_compile_flags("-mstackrealign")
 endif()