diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8773f198523..9c31bbeb61c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,8 @@
 cmake_minimum_required(VERSION 2.8)
 project(REACTOS)
 
+include(CMakeMacros.cmake)
+
 set(CMAKE_INCLUDE_CURRENT_DIR ON)
 set(CMAKE_INCLUDE_DIRECTORIES_PROJECT_BEFORE ON)
 
@@ -46,7 +48,7 @@ add_definitions(-DUSE_COMPILER_EXCEPTIONS)
 add_definitions(-D_USE_32BIT_TIME_T)
 
 # Compiler Core
-add_definitions(-pipe -fms-extensions -fno-set-stack-executable)
+add_definitions(-pipe -fms-extensions)
 
 # Debugging (Note: DWARF-4 on 4.5.1 when we ship)
 add_definitions(-gdwarf-2 -g2 -femit-struct-debug-detailed=none -feliminate-unused-debug-types)
@@ -55,23 +57,23 @@ add_definitions(-gdwarf-2 -g2 -femit-struct-debug-detailed=none -feliminate-unus
 add_definitions(-march=pentium -mtune=i686)
 
 # Warnings
-add_definitions(-Wall -Wno-char-subscripts -Wpointer-arith -Wno-multichar -Wno-error=uninitialized -Wno-unused-value)
+add_definitions(-Wall -Wno-char-subscripts -Wpointer-arith -Wno-multichar -Wno-error=uninitialized -Wno-unused-value  -Winvalid-pch)
 
 # Optimizations
 add_definitions(-Os -fno-strict-aliasing -ftracer -momit-leaf-frame-pointer -mpreferred-stack-boundary=2 -fno-optimize-sibling-calls)
 
-include_directories(./include)
-include_directories(./include/psdk)
-include_directories(./include/dxsdk)
+include_directories(include)
+include_directories(include/psdk)
+include_directories(include/dxsdk)
 include_directories(${REACTOS_BINARY_DIR}/include/dxsdk)
 include_directories(${REACTOS_BINARY_DIR}/include/psdk)
 include_directories(${REACTOS_BINARY_DIR}/include/reactos)
-include_directories(./include/crt)
-include_directories(./include/crt/mingw32)
-include_directories(./include/ddk)
-include_directories(./include/ndk)
-include_directories(./include/reactos)
-include_directories(./include/reactos/libs)
+include_directories(include/crt)
+include_directories(include/crt/mingw32)
+include_directories(include/ddk)
+include_directories(include/ndk)
+include_directories(include/reactos)
+include_directories(include/reactos/libs)
 
 add_subdirectory(include/psdk)
 add_subdirectory(include/dxsdk)
diff --git a/CMakeMacros.cmake b/CMakeMacros.cmake
new file mode 100644
index 00000000000..d4104c2bf2b
--- /dev/null
+++ b/CMakeMacros.cmake
@@ -0,0 +1,40 @@
+MACRO(_PCH_GET_COMPILE_FLAGS _target_name _out_compile_flags _header_filename)
+
+    # Add the precompiled header to the build
+    SET(_gch_filename "${_header_filename}.gch")
+    LIST(APPEND ${_out_compile_flags} -c ${_header_filename} -o ${_gch_filename})
+
+    # This gets us our includes
+    GET_DIRECTORY_PROPERTY(DIRINC INCLUDE_DIRECTORIES)
+    FOREACH(item ${DIRINC})
+        LIST(APPEND ${_out_compile_flags} -I${item})
+    ENDFOREACH(item) 
+
+    # This is a particular bit of undocumented/hacky magic I'm quite proud of
+    GET_DIRECTORY_PROPERTY(_compiler_flags DEFINITIONS)
+    STRING(REPLACE "\ " "\t" _compiler_flags ${_compiler_flags})
+    LIST(APPEND ${_out_compile_flags} ${_compiler_flags})
+
+    # This gets any specific definitions that were added with set-target-property
+    GET_TARGET_PROPERTY(_target_defs ${_target_name} COMPILE_DEFINITIONS)
+    IF (_target_defs)
+    	FOREACH(item ${_target_defs})
+            LIST(APPEND ${_out_compile_flags} -D${item})
+   	ENDFOREACH(item)
+    ENDIF()
+
+ENDMACRO(_PCH_GET_COMPILE_FLAGS) 
+
+MACRO(add_pch _target_name _header_filename _src_list)
+
+	SET(_gch_filename "${_header_filename}.gch")
+
+	LIST(APPEND ${_src_list} ${_gch_filename})
+
+	_PCH_GET_COMPILE_FLAGS(${_target_name} _args ${_header_filename})
+
+	add_custom_command(OUTPUT ${_gch_filename}
+		   COMMAND rm -f ${_gch_filename}
+		   COMMAND ${CMAKE_C_COMPILER} ${CMAKE_C_COMPILER_ARG1} ${_args}
+			    DEPENDS ${_header_filename})
+ENDMACRO(add_pch _target_name _header_filename _src_list)
diff --git a/lib/rtl/CMakeLists.txt b/lib/rtl/CMakeLists.txt
index e9783e26500..fda01805ddb 100644
--- a/lib/rtl/CMakeLists.txt
+++ b/lib/rtl/CMakeLists.txt
@@ -11,6 +11,7 @@ list(REMOVE_ITEM SOURCE ${CMAKE_CURRENT_SOURCE_DIR}/avlsupp.c
                         ${CMAKE_CURRENT_SOURCE_DIR}/mem.c
                         ${CMAKE_CURRENT_SOURCE_DIR}/memgen.c)
 
-add_library(rtl ${ARCH_SOURCE} ${SOURCE})
+add_library(rtl ${ARCH_SOURCE} ${SOURCE} ${CMAKE_CURRENT_SOURCE_DIR}/rtl.h.gch)
+add_pch(rtl ${CMAKE_CURRENT_SOURCE_DIR}/rtl.h ${SOURCE})
 add_dependencies(rtl psdk)
 
diff --git a/lib/sdk/crt/CMakeLists.txt b/lib/sdk/crt/CMakeLists.txt
index 3c9043ffccd..11e23964155 100644
--- a/lib/sdk/crt/CMakeLists.txt
+++ b/lib/sdk/crt/CMakeLists.txt
@@ -1,4 +1,3 @@
-
 include_directories(./include)
 
 add_definitions(-D_CRTBLD)
@@ -7,8 +6,11 @@ file(GLOB_RECURSE CRT_SOURCE "*.c")
 LIST(REMOVE_ITEM CRT_SOURCE ${CMAKE_CURRENT_SOURCE_DIR}/stdio/findgen.c)
 LIST(REMOVE_ITEM CRT_SOURCE ${CMAKE_CURRENT_SOURCE_DIR}/string/strtold.c)
 
-add_library(crt ${CRT_SOURCE})
+SET_SOURCE_FILES_PROPERTIES(${CMAKE_CURRENT_BINARY_DIR}/precomp.h.gch PROPERTIES GENERATED ON)
+
+add_library(crt ${CRT_SOURCE} ${CMAKE_CURRENT_SOURCE_DIR}/precomp.h.gch)
 set_property(TARGET crt PROPERTY COMPILE_DEFINITIONS __MINGW_IMPORT=extern USE_MSVCRT_PREFIX _MSVCRT_LIB_ _MSVCRT_ _MT)
+add_pch(crt ${CMAKE_CURRENT_SOURCE_DIR}/precomp.h ${CRT_SOURCE})
 add_dependencies(crt psdk)
 
 if(ARCH MATCHES i386)