From 4ca746deb79da42b865fe76d68349722e78cc9f7 Mon Sep 17 00:00:00 2001
From: ligazetom <krasnanskyjuraj@gmail.com>
Date: Thu, 9 Jan 2025 16:42:38 +0100
Subject: [PATCH] Allow for cmake w-flags addition

---
 mesonbuild/cmake/__init__.py |  3 ++-
 mesonbuild/cmake/common.py   | 17 +++++++++++++++++
 mesonbuild/modules/cmake.py  |  8 +++++++-
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/mesonbuild/cmake/__init__.py b/mesonbuild/cmake/__init__.py
index 607df8977cf6..600e327c3295 100644
--- a/mesonbuild/cmake/__init__.py
+++ b/mesonbuild/cmake/__init__.py
@@ -15,12 +15,13 @@
     'TargetOptions',
     'language_map',
     'cmake_defines_to_args',
+    'cmake_warning_flags_to_args',
     'check_cmake_args',
     'cmake_is_debug',
     'resolve_cmake_trace_targets',
 ]
 
-from .common import CMakeException, TargetOptions, cmake_defines_to_args, language_map, check_cmake_args, cmake_is_debug
+from .common import CMakeException, TargetOptions, cmake_defines_to_args, cmake_warning_flags_to_args, language_map, check_cmake_args, cmake_is_debug
 from .executor import CMakeExecutor
 from .interpreter import CMakeInterpreter
 from .toolchain import CMakeToolchain, CMakeExecScope
diff --git a/mesonbuild/cmake/common.py b/mesonbuild/cmake/common.py
index d9ff559971f7..6dfd1715660e 100644
--- a/mesonbuild/cmake/common.py
+++ b/mesonbuild/cmake/common.py
@@ -51,6 +51,9 @@
     'MESON_CMAKE_ROOT',
 ]
 
+blacklist_cmake_warning_flags = [
+]
+
 def cmake_is_debug(env: 'Environment') -> bool:
     if OptionKey('b_vscrt') in env.coredata.optstore:
         is_debug = env.coredata.get_option(OptionKey('buildtype')) == 'debug'
@@ -130,6 +133,20 @@ def cmake_defines_to_args(raw: T.List[T.Dict[str, TYPE_var]], permissive: bool =
 
     return res
 
+def cmake_warning_flags_to_args(raw: T.List[str], permissive: bool = False) -> T.List[str]:
+    res: T.List[str] = []
+
+    for flag in raw:
+        if flag in blacklist_cmake_warning_flags:
+            # idk something something
+            #mlog.warning('Setting', mlog.bold(flag), 'is not supported. See the meson docs for cross compilation support:')
+            #mlog.warning('  - URL: https://mesonbuild.com/CMake-module.html#cross-compilation')
+            #mlog.warning('  --> Ignoring this option')
+            continue
+        res += [f'-W{flag}']
+
+    return res
+
 # TODO: this function will become obsolete once the `cmake_args` kwarg is dropped
 def check_cmake_args(args: T.List[str]) -> T.List[str]:
     res: T.List[str] = []
diff --git a/mesonbuild/modules/cmake.py b/mesonbuild/modules/cmake.py
index 2168aaa516c0..4600cb6f47a8 100644
--- a/mesonbuild/modules/cmake.py
+++ b/mesonbuild/modules/cmake.py
@@ -11,7 +11,7 @@
 
 from .. import build, mesonlib, mlog, dependencies
 from ..options import OptionKey
-from ..cmake import TargetOptions, cmake_defines_to_args
+from ..cmake import TargetOptions, cmake_defines_to_args, cmake_warning_flags_to_args
 from ..interpreter import SubprojectHolder
 from ..interpreter.type_checking import REQUIRED_KW, INSTALL_DIR_KW, NoneType, in_set_validator
 from ..interpreterbase import (
@@ -191,6 +191,7 @@ def __init__(self) -> None:
         self.methods.update(
             {
                 'add_cmake_defines': self.add_cmake_defines,
+                'add_cmake_warning_flags': self.add_cmake_warning_flags,
                 'set_override_option': self.set_override_option,
                 'set_install': self.set_install,
                 'append_compile_args': self.append_compile_args,
@@ -209,6 +210,11 @@ def _get_opts(self, kwargs: TargetKW) -> SingleTargetOptions:
     def add_cmake_defines(self, state: ModuleState, args: T.Tuple[T.List[T.Dict[str, TYPE_var]]], kwargs: TYPE_kwargs) -> None:
         self.cmake_options += cmake_defines_to_args(args[0])
 
+    @typed_pos_args('subproject_options.add_cmake_warning_flags', varargs=str)
+    @noKwargs
+    def add_cmake_warning_flags(self, state: ModuleState, args: T.Tuple[T.List[str]], kwargs: TYPE_kwargs) -> None:
+        self.cmake_options += cmake_warning_flags_to_args(args[0])
+
     @typed_pos_args('subproject_options.set_override_option', str, str)
     @typed_kwargs('subproject_options.set_override_option', _TARGET_KW)
     def set_override_option(self, state: ModuleState, args: T.Tuple[str, str], kwargs: TargetKW) -> None: