Filter out UNIX flags from external deps when using the MSVC compiler

This is very useful to prevent compiler noise about invalid cflags; particularly
for the -mms-bitfields cflag which most libraries send to the mingw-gcc
compiler. More can be added later.

1 files changed, 22 insertions, 4 deletions

diff --git a/mesonbuild/compilers.py b/mesonbuild/compilers.py
index cb6b7c7..7cf152f 100644
--- a/mesonbuild/compilers.py
+++ b/mesonbuild/compilers.py
@@ -184,7 +184,10 @@ class Compiler():
     def has_function(self, *args, **kwargs):
         raise EnvironmentException('Language %s does not support function checks.' % self.language)
 
-    def unixtype_flags_to_native(self, args):
+    def unix_link_flags_to_native(self, args):
+        return args
+
+    def unix_compile_flags_to_native(self, args):
         return args
 
 class CCompiler(Compiler):
@@ -1174,7 +1177,7 @@ class VisualStudioCCompiler(CCompiler):
     def get_option_link_args(self, options):
         return options['c_winlibs'].value
 
-    def unixtype_flags_to_native(self, args):
+    def unix_link_flags_to_native(self, args):
         result = []
         for i in args:
             if i.startswith('-L'):
@@ -1182,6 +1185,15 @@ class VisualStudioCCompiler(CCompiler):
             result.append(i)
         return result
 
+    def unix_compile_flags_to_native(self, args):
+        result = []
+        for i in args:
+            # -mms-bitfields is specific to MinGW-GCC
+            if i == '-mms-bitfields':
+                continue
+            result.append(i)
+        return result
+
     def get_include_args(self, path, is_system):
         if path == '':
             path = '.'
@@ -1799,7 +1811,10 @@ class VisualStudioLinker():
     def get_option_link_args(self, options):
         return []
 
-    def unixtype_flags_to_native(self, args):
+    def unix_link_flags_to_native(self, args):
+        return args
+
+    def unix_compile_flags_to_native(self, args):
         return args
 
 class ArLinker():
@@ -1845,5 +1860,8 @@ class ArLinker():
     def get_option_link_args(self, options):
         return []
 
-    def unixtype_flags_to_native(self, args):
+    def unix_link_flags_to_native(self, args):
+        return args
+
+    def unix_compile_flags_to_native(self, args):
         return args