fix build for platforms that do not support JIT; add --disable-jit configure option

svn: r16252

src/configure

@@ -1344,6 +1344,7 @@ Optional Features:
   --enable-dynlib         same as --enable-shared
   --enable-lt=<prog>      use <prog> instead of bundled libtool
   --enable-origtree       install with original directory structure
+  --enable-jit            compile JIT support (enabled by default)
   --enable-foreign        compile foreign support (enabled by default)
   --enable-places         compile places support
   --enable-cgcdefault     use CGC (Boehm or Senora) as default build
@@ -1879,6 +1880,14 @@ if test "${enable_origtree+set}" = set; then
 fi
 
 
+# Check whether --enable-jit was given.
+if test "${enable_jit+set}" = set; then
+  enableval=$enable_jit;
+else
+  enable_jit=yes
+fi
+
+
 # Check whether --enable-foreign was given.
 if test "${enable_foreign+set}" = set; then
   enableval=$enable_foreign;
@@ -2235,6 +2244,8 @@ if test "$LIBTOOLPROG" != "" ; then
 fi
 show_explicitly_enabled "${enable_orig}" "Original install tree"
 
+show_explicitly_disabled "${enable_jit}" JIT
+
 show_explicitly_disabled "${enable_foreign}" Foreign
 
 show_explicitly_enabled "${enable_sgc}" SGC
@@ -10365,6 +10376,12 @@ if test "${enable_noopt}" = "yes" ; then
   CXXFLAGS=`echo "$CXXFLAGS" | awk "$AWKPRG"`
 fi
 
+################### JIT ####################
+
+if test "${enable_jit}" = "no" ; then
+   PREFLAGS="${PREFLAGS} -DMZ_DONT_USE_JIT"
+fi
+
 ################ X OpenGL ##################
 
 if test "${enable_gl}" = "" ; then

src/mzscheme/configure.ac

@@ -39,6 +39,8 @@ AC_ARG_ENABLE(lt,      [  --enable-lt=<prog>      use <prog> instead of bundled
 
 AC_ARG_ENABLE(origtree,[  --enable-origtree       install with original directory structure])
 
+AC_ARG_ENABLE(jit,     [  --enable-jit            compile JIT support (enabled by default)], , enable_jit=yes)
+
 AC_ARG_ENABLE(foreign, [  --enable-foreign        compile foreign support (enabled by default)], , enable_foreign=yes)
 
 AC_ARG_ENABLE(places,  [  --enable-places         compile places support])
@@ -287,6 +289,8 @@ if test "$LIBTOOLPROG" != "" ; then
 fi
 show_explicitly_enabled "${enable_orig}" "Original install tree"
 
+show_explicitly_disabled "${enable_jit}" JIT
+
 show_explicitly_disabled "${enable_foreign}" Foreign
 
 show_explicitly_enabled "${enable_sgc}" SGC
@@ -1072,6 +1076,12 @@ if test "${enable_noopt}" = "yes" ; then
   CXXFLAGS=`echo "$CXXFLAGS" | awk "$AWKPRG"`
 fi
 
+################### JIT ####################
+
+if test "${enable_jit}" = "no" ; then
+   PREFLAGS="${PREFLAGS} -DMZ_DONT_USE_JIT"
+fi
+
 ################ X OpenGL ##################
 
 if test "${enable_gl}" = "" ; then

src/mzscheme/include/scheme.h

@@ -176,8 +176,10 @@ typedef struct FSSpec mzFSSpec;
 # define THREAD_LOCAL /* empty */
 #endif
 
-#if defined(MZ_USE_JIT_PPC) || defined(MZ_USE_JIT_I386) || defined(MZ_USE_JIT_X86_64)
-# define MZ_USE_JIT
+#ifndef MZ_DONT_USE_JIT
+# if defined(MZ_USE_JIT_PPC) || defined(MZ_USE_JIT_I386) || defined(MZ_USE_JIT_X86_64)
+#  define MZ_USE_JIT
+# endif
 #endif
 
 /* Define _W64 for MSC if needed. */

src/mzscheme/src/schpriv.h

@@ -3219,8 +3219,13 @@ unsigned short * scheme_ucs4_to_utf16(const mzchar *text, int start, int end,
 
 Scheme_Object *scheme_current_library_collection_paths(int argc, Scheme_Object *argv[]);
 
+#ifdef MZ_USE_JIT
 int scheme_can_inline_fp_op();
 int scheme_can_inline_fp_comp();
+#else
+# define scheme_can_inline_fp_op() 0
+# define scheme_can_inline_fp_comp() 0
+#endif
 
 /*========================================================================*/
 /*                           places                                       */