fixes to make this branch compatible with llvm versions before 3.4

llvmpy/include/llvm_binding/extra.h

@@ -955,6 +955,7 @@ PyObject* TargetRegistry_targets_list()
                   "llvm::Target", "llvm::Target");
 }
 
+#if LLVM_VERSION_MAJOR >= 3 and LLVM_VERSION_MINOR >= 4
 static
 PyObject* MemoryObject_readBytes(const llvm::MemoryObject *mobj,
                                  uint64_t addr,
@@ -986,7 +987,6 @@ fail:
     Py_RETURN_NONE;
 }
 
-#if LLVM_VERSION_MAJOR >= 3 and LLVM_VERSION_MINOR >= 4
 static
 PyObject* MCDisassembler_getInstruction(llvm::MCDisassembler *disasm, 
                                         llvm::MCInst &instr,

llvmpy/src/MC/__init__.py

@@ -1,3 +1,5 @@
+#this file is not processed unless the llvm library is 
+#version 3.4 or higher. see llvmpy/__init__.py for details.
 from binding import *
 from ..namespace import llvm
 from ..Support.StringRefMemoryObject import MemoryObject

llvmpy/src/Support/StringRefMemoryObject.py

@@ -2,31 +2,29 @@ from binding import *
 from ..namespace import llvm
 from ..ADT.StringRef import StringRef
 
-MemoryObject = llvm.Class()
 if LLVM_VERSION >= (3, 4):
+    MemoryObject = llvm.Class()
     StringRefMemoryObject = llvm.Class(MemoryObject)
 
-@MemoryObject
-class MemoryObject:
-    _include_ = "llvm/Support/MemoryObject.h"
+    @MemoryObject
+    class MemoryObject:
+        _include_ = "llvm/Support/MemoryObject.h"
 
-    getBase = Method(cast(Uint64, int))
-    getExtent = Method(cast(Uint64, int))
+        getBase = Method(cast(Uint64, int))
+        getExtent = Method(cast(Uint64, int))
 
-    readBytes = CustomMethod('MemoryObject_readBytes',
-                             PyObjectPtr,
-                             cast(int, Uint64), #address
-                             cast(int, Uint64)  #size 
-                             )
-    @CustomPythonMethod
-    def readAll(self):
-        result = self.readBytes(self.getBase(), self.getExtent())
-        if not result:
-            raise Exception("expected readBytes to be successful!")
-        return result
+        readBytes = CustomMethod('MemoryObject_readBytes',
+                                 PyObjectPtr,
+                                 cast(int, Uint64), #address
+                                 cast(int, Uint64)  #size 
+                                 )
+        @CustomPythonMethod
+        def readAll(self):
+            result = self.readBytes(self.getBase(), self.getExtent())
+            if not result:
+                raise Exception("expected readBytes to be successful!")
+            return result
 
-
-if LLVM_VERSION >= (3, 4):
     @StringRefMemoryObject
     class StringRefMemoryObject:
         _include_ = "llvm/Support/StringRefMemoryObject.h"

test/example-instruction-info.py

@@ -3,33 +3,36 @@ from llvmpy import api, extra
 
 
 def main():
-  triple = "i386--"
+    if llvm.version < (3, 4):
+        return 0
 
-  print("init start")
-  api.llvm.InitializeAllTargets()
-  api.llvm.InitializeAllTargetInfos()
-  api.llvm.InitializeAllTargetMCs()
-  api.llvm.InitializeAllAsmParsers()
-  api.llvm.InitializeAllAsmPrinters()
-  api.llvm.InitializeAllDisassemblers()
-  print("init done\n")
+    triple = "i386--"
 
-  tm = llvm.target.TargetMachine.x86()
-  if not tm:
-    print("error: failed to lookup target x86 \n")
-    return 1
+    print("init start")
+    api.llvm.InitializeAllTargets()
+    api.llvm.InitializeAllTargetInfos()
+    api.llvm.InitializeAllTargetMCs()
+    api.llvm.InitializeAllAsmParsers()
+    api.llvm.InitializeAllAsmPrinters()
+    api.llvm.InitializeAllDisassemblers()
+    print("init done\n")
 
-  print("created target machine\n")
+    tm = llvm.target.TargetMachine.x86()
+    if not tm:
+        print("error: failed to lookup target x86 \n")
+        return 1
 
-  MII = tm.instr_info
-  if not MII:
-    print("error: no instruction info for target " + triple + "\n")
-    return 1
+    print("created target machine\n")
 
-  print("created instr info\n")
-  MID = MII.get(919) #int3
-  print("INT3(%d): flags=0x%x, tsflags=0x%x\n" % (MID.getOpcode(), MID.getFlags(), MID.TSFlags))
+    MII = tm.instr_info
+    if not MII:
+        print("error: no instruction info for target " + triple + "\n")
+        return 1
 
-  return 0
+    print("created instr info\n")
+    MID = MII.get(919) #int3
+    print("INT3(%d): flags=0x%x, tsflags=0x%x\n" % (MID.getOpcode(), MID.getFlags(), MID.TSFlags))
+
+    return 0
 
 exit(main())

test/testall.py

@@ -652,6 +652,9 @@ def do_llvm_target():
          tm.is_little_endian()
 
 def do_llvm_mc():
+    if llvm.version < (3, 4):
+        return
+
     from llvm import target
     from llvm import mc