Add internal configuration file, add missing includes, rename some options

CMakeLists.txt

@@ -10,6 +10,9 @@ include(CheckIPOSupported)
 include(CheckIncludeFile)
 include(CheckSymbolExists)
 
+# Project settings
+option(BH_PLATFORM_THREADS "Enable multithreading support" TRUE)
+
 # Check for IPO/LTO
 check_ipo_supported(RESULT supported)
 
@@ -55,6 +58,7 @@ set(BH_INCLUDE_DIRS
 if(WIN32)
     message(STATUS "Platform - Win32")
     set(BH_PLATFORM_WIN TRUE)
+    option(BH_THREADS_WINXP "Enable threading support for Windows XP" FALSE)
 
     # Add platform dependent files
     list(APPEND BH_SOURCE
@@ -62,8 +66,11 @@ if(WIN32)
     )
 
     # Check multithreading support
-    check_symbol_exists(_beginthread process.h BH_USE_WINTHREAD)
-    if(BH_USE_WINTHREAD)
+    if(BH_PLATFORM_THREADS)
+        check_symbol_exists(_beginthread process.h BH_PLATFORM_THREADS)
+    endif()
+
+    if(BH_PLATFORM_THREADS)
         message(STATUS "Multithreading enabled")
         list(APPEND BH_SOURCE
             src/thread_win.c
@@ -75,7 +82,7 @@ if(WIN32)
         )
     endif()
     
-    if(BH_NO_WINXP)
+    if(NOT BH_THREADS_WINXP)
         add_definitions(-D_WIN32_WINNT=_WIN32_WINNT_VISTA -DWINVER=_WIN32_WINNT_VISTA)
     endif()
 elseif(UNIX)
@@ -88,8 +95,11 @@ elseif(UNIX)
     )
 
     # Check multithreading support
-    check_include_file(pthread.h BH_USE_PTHREAD)
-    if(BH_USE_PTHREAD)
+    if(BH_PLATFORM_THREADS)
+        check_include_file(pthread.h BH_PLATFORM_THREADS)
+    endif()
+
+    if(BH_PLATFORM_THREADS)
         message(STATUS "Multithreading enabled")
         list(APPEND BH_SOURCE
             src/thread_posix.c
@@ -111,6 +121,7 @@ endif()
 
 # Configure library
 configure_file(include/bh/config.in include/bh/config.h)
+configure_file(include/bh/internal/config.in include/bh/internal/config.h)
 
 # Library
 add_library(bhlib STATIC ${BH_SOURCE} ${BH_HEADER})