compilers: drop dead code

no_warn_args is unused. Its only purpose was to implement automatic
hiding of UB in transpiled code, and it was not used at all in languages
other than C/C++ -- specifically when the C/C++ source files were
created by transpiling from vala or cython.

mesonbuild/compilers/compilers.py

@@ -1377,10 +1377,6 @@ class Compiler(HoldableObject, metaclass=abc.ABCMeta):
         """Arguments required for a debug build."""
         return []
 
-    def get_no_warn_args(self) -> T.List[str]:
-        """Arguments to completely disable warnings."""
-        return []
-
     def needs_static_linker(self) -> bool:
         raise NotImplementedError(f'There is no static linker for {self.language}')
 

mesonbuild/compilers/fortran.py

@@ -253,10 +253,6 @@ class G95FortranCompiler(FortranCompiler):
     def get_module_outdir_args(self, path: str) -> T.List[str]:
         return ['-fmod=' + path]
 
-    def get_no_warn_args(self) -> T.List[str]:
-        # FIXME: Confirm that there's no compiler option to disable all warnings
-        return []
-
 
 class SunFortranCompiler(FortranCompiler):
 

mesonbuild/compilers/java.py

@@ -52,9 +52,6 @@ class JavaCompiler(BasicLinkerIsCompilerMixin, Compiler):
     def get_werror_args(self) -> T.List[str]:
         return ['-Werror']
 
-    def get_no_warn_args(self) -> T.List[str]:
-        return ['-nowarn']
-
     def get_output_args(self, outputname: str) -> T.List[str]:
         if outputname == '':
             outputname = './'

mesonbuild/compilers/mixins/clike.py

@@ -177,10 +177,6 @@ class CLikeCompiler(Compiler):
         # TODO: this should be an enum
         return self.warn_args[level]
 
-    def get_no_warn_args(self) -> T.List[str]:
-        # Almost every compiler uses this for disabling warnings
-        return ['-w']
-
     def get_depfile_suffix(self) -> str:
         return 'd'
 

mesonbuild/compilers/mixins/pgi.py

@@ -61,9 +61,6 @@ class PGICompiler(Compiler):
     def get_module_incdir_args(self) -> T.Tuple[str]:
         return ('-module', )
 
-    def get_no_warn_args(self) -> T.List[str]:
-        return ['-silent']
-
     def gen_import_library_args(self, implibname: str) -> T.List[str]:
         return []
 

mesonbuild/compilers/rust.py

@@ -213,9 +213,6 @@ class RustCompiler(Compiler):
         # TODO: I'm not really sure what to put here, Rustc doesn't have warning
         return self._WARNING_LEVELS[level]
 
-    def get_no_warn_args(self) -> T.List[str]:
-        return self._WARNING_LEVELS["0"]
-
     def get_pic_args(self) -> T.List[str]:
         # relocation-model=pic is rustc's default already.
         return []

mesonbuild/compilers/vala.py

@@ -66,9 +66,6 @@ class ValaCompiler(Compiler):
     def get_warn_args(self, level: str) -> T.List[str]:
         return []
 
-    def get_no_warn_args(self) -> T.List[str]:
-        return ['--disable-warnings']
-
     def get_werror_args(self) -> T.List[str]:
         return ['--fatal-warnings']