Basic GDB JIT Interface integration.

SConstruct

Index: SConstruct
diff --git a/SConstruct b/SConstruct
index f6d1385a62eaa2d8b506190600a7af3352c72823..6b6c0b39b7644d030e6739fa91e2d8b89061f083 100644
--- a/SConstruct
+++ b/SConstruct
@@ -229,6 +229,9 @@ LIBRARY_FLAGS = {
     },
     'prof:oprofile': {
       'CPPDEFINES':   ['ENABLE_OPROFILE_AGENT']
+    },
+    'gdbjit:on': {
+      'CPPDEFINES':   ['ENABLE_GDBJIT_INTERFACE']
     }
   },
   'msvc': {
@@ -704,6 +707,11 @@ SIMPLE_OPTIONS = {
     'default': 'off',
     'help': 'enable profiling of build target'
   },
+  'gdbjit': {
+    'values': ['on', 'off'],
+    'default': 'off',
+    'help': 'enable GDB JIT interface'
+  },
   'library': {
     'values': ['static', 'shared'],
     'default': 'static',
@@ -870,6 +878,8 @@ def VerifyOptions(env):
     return False
   if env['os'] == 'win32' and env['library'] == 'shared' and env['prof'] == 'on':
     Abort("Profiling on windows only supported for static library.")
+  if env['gdbjit'] == 'on' and (env['os'] != 'linux' or (env['arch'] != 'ia32' and env['arch'] != 'x64')):
+    Abort("GDBJIT interface is supported only for 32-bit Linux target.")

[Erik Corry, 2011/01/05 09:00:15]

32-bit should perhaps be Intel-compatible?

[Vyacheslav Egorov (Chromium), 2011/01/18 16:10:42]

Done.

   if env['prof'] == 'oprofile' and env['os'] != 'linux':
     Abort("OProfile is only supported on Linux.")
   if env['os'] == 'win32' and env['soname'] == 'on':