diff --git a/nimterop/cimport.nim b/nimterop/cimport.nim
index a47443c..8a85145 100644
--- a/nimterop/cimport.nim
+++ b/nimterop/cimport.nim
@@ -34,16 +34,20 @@ macro cDebug*(): untyped =
 macro cDefine*(name: static string, val: static string = ""): untyped =
   result = newNimNode(nnkStmtList)
   
-  var str = "-D" & name
+  var str = name
   if val.nBl:
     str &= &"=\"{val}\""
   
-  result.add(quote do:
-    {.passC: `str`.}
-  )
+  if str notin gDefines:
+    gDefines.add(str)
+    str = "-D" & str
 
-  if gDebug:
-    echo result.repr
+    result.add(quote do:
+      {.passC: `str`.}
+    )
+
+    if gDebug:
+      echo result.repr
 
 macro cAddSearchDir*(dir: static string): untyped =
   result = newNimNode(nnkStmtList)
diff --git a/nimterop/getters.nim b/nimterop/getters.nim
index 0412522..6ba83e8 100644
--- a/nimterop/getters.nim
+++ b/nimterop/getters.nim
@@ -1,15 +1,15 @@
-import macros, strutils
+import macros, strformat, strutils
 
 import regex
 
-import globals
+import git, globals
 
 proc getIdentifier*(str: string): string =
   result = str.strip(chars={'_'})
 
 proc getType*(str: string): string =
   result = str.strip(chars={'_'}).replace(re"([u]?int[\d]+)_t", "$1").replace(re"^void$", "object")
-  
+
 proc getLit*(str: string): string =
   if str.contains(re"^[\-]?[\d]+$") or
     str.contains(re"^[\-]?[\d]*\.[\d]+$") or
@@ -19,15 +19,8 @@ proc getLit*(str: string): string =
 proc getNodeValIf*(node: ref Ast, esym: Sym): string =
   if esym != node.sym:
     return
-  
-  return gCode[node.start .. node.stop-1].strip()
 
-proc getGccPaths*(mode = "c"): string =
-  var
-    nul = when defined(Windows): "nul" else: "/dev/null"
-    mmode = if mode == "cpp": "c++" else: mode
-  
-  return staticExec("gcc -Wp,-v -x" & mmode & " " & nul)
+  return gCode[node.start .. node.stop-1].strip()
 
 proc getLineCol*(node: ref Ast): tuple[line, col: int] =
   result.line = 1
@@ -36,4 +29,25 @@ proc getLineCol*(node: ref Ast): tuple[line, col: int] =
     if gCode[i] == '\n':
       result.col = 0
       result.line += 1
-    result.col += 1
\ No newline at end of file
+    result.col += 1
+
+proc getGccPaths*(mode = "c"): string =
+  var
+    nul = when defined(Windows): "nul" else: "/dev/null"
+    mmode = if mode == "cpp": "c++" else: mode
+
+  return staticExec("gcc -Wp,-v -x" & mmode & " " & nul)
+
+proc getPreprocessor*(fullpath: string, mode = "cpp"): string =
+  var
+    mmode = if mode == "cpp": "c++" else: mode
+    cmd = &"gcc -E -dD -x{mmode} "
+
+  for inc in gIncludeDirs:
+    cmd &= &"-I\"{inc}\" "
+
+  for def in gDefines:
+    cmd &= &"-D{def} "
+
+  cmd &= &"\"{fullpath}\""
+  return staticExec(cmd)
\ No newline at end of file