From 535ddedd6087a30efb3348d579c208cbf097ab43 Mon Sep 17 00:00:00 2001
From: geisserml <geisserml@gmail.com>
Date: Fri, 19 Jan 2024 23:45:21 +0100
Subject: [PATCH] Add option to get rid of all CPP defaults at once

---
 ctypesgen/__main__.py            | 7 ++++++-
 ctypesgen/parser/preprocessor.py | 6 ++++--
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/ctypesgen/__main__.py b/ctypesgen/__main__.py
index 5340f779..a689e501 100644
--- a/ctypesgen/__main__.py
+++ b/ctypesgen/__main__.py
@@ -192,13 +192,18 @@ def __call__(self, parser, namespace, values, option_string=None):
         help="Instruct the preprocessor to undefine the specified macro via commandline",
     )
     parser.add_argument(
-        "-X", "--no-default-cppflags",
+        "-X", "--pop-default-flags",
         nargs="+",
         action="extend",
         default=[],
         metavar="ENTRY",
         help="Remove ENTRY from preprocessor defaults, e.g. -X __GNUC__ can be used to not implicitly undefine __GNUC__.",
     )
+    parser.add_argument(
+        "--no-default-flags",
+        action="store_true",
+        help="Do not add any default defines/undefines at all. Beware: this will most probably lead to more parser errors."
+    )
     parser.add_argument(
         "--preproc-savepath",
         metavar="FILENAME",
diff --git a/ctypesgen/parser/preprocessor.py b/ctypesgen/parser/preprocessor.py
index 380b6b68..8f301c1f 100755
--- a/ctypesgen/parser/preprocessor.py
+++ b/ctypesgen/parser/preprocessor.py
@@ -61,7 +61,6 @@ def __init__(self, options, cparser):
         self.cparser = cparser  # An instance of CParser
         
         self.default_flags = {"-D": {}, "-U": []}
-        
         self.default_flags["-D"].update({
             "__extension__": "",
             "__asm__(x)": "",
@@ -97,8 +96,11 @@ def __init__(self, options, cparser):
     
     def _get_default_flags(self):
         
+        if self.options.no_default_flags:
+            return {}
+        
         flags_dict = copy.deepcopy(self.default_flags)
-        crossout = self.options.no_default_cppflags
+        crossout = self.options.pop_default_flags
         for params in flags_dict.values():
             deletor = params.pop if isinstance(params, dict) else params.remove
             unfound = []