meson: don't error on formaters with mingw

MSVC is generally happy, but mingw errors. I've spent as much time
(several days) trying to squash all of these warnings and I'm done with
it, just leave them as warnings with MinGW.

Acked-by: Kristian H. Kristensen <hoegsberg@google.com>

diff --git a/meson.build b/meson.build
index 781a21cf2ee13678c727cce053f36ffa43d2575c..c96f1ed0f7be7e756883d2e4002926ff6ccfbef3 100644 (file)
--- a/meson.build
+++ b/meson.build
@@ -937,28 +937,41 @@ if cc.get_id() == 'msvc'
     cpp_args += '-Wno-microsoft-enum-value'
   endif
 else
-  foreach a : ['-Werror=implicit-function-declaration',
-              '-Werror=missing-prototypes',
-              '-Werror=return-type',
-              '-Werror=incompatible-pointer-types',
-              '-Werror=format',
-              '-Wformat-security',
-              '-Wno-missing-field-initializers',
-              '-Wno-format-truncation',
-              '-fno-math-errno',
-              '-fno-trapping-math',
-              '-Qunused-arguments']
+  _trial = [
+    '-Werror=implicit-function-declaration',
+    '-Werror=missing-prototypes',
+    '-Werror=return-type',
+    '-Werror=incompatible-pointer-types',
+    '-Wno-missing-field-initializers',
+    '-Wno-format-truncation',
+    '-fno-math-errno',
+    '-fno-trapping-math',
+    '-Qunused-arguments',
+  ]
+  # MinGW chokes on format specifiers and I can't get it all working
+  if not (cc.get_id() == 'gcc' and host_machine.system() == 'windows')
+    _trial += ['-Werror=format', '-Wformat-security']
+  endif
+  foreach a : _trial
     if cc.has_argument(a)
       c_args += a
     endif
   endforeach
 
-  # Check for generic C++ arguments
-  foreach a : ['-Werror=return-type',
-               '-Werror=format',
-               '-Wformat-security',
-               '-fno-math-errno', '-fno-trapping-math',
-               '-Qunused-arguments']
+  _trial = [
+    '-Werror=return-type',
+    '-Wno-non-virtual-dtor',
+    '-Wno-missing-field-initializers',
+    '-Wno-format-truncation',
+    '-fno-math-errno',
+    '-fno-trapping-math',
+    '-Qunused-arguments',
+  ]
+  # MinGW chokes on format specifiers and I can't get it all working
+  if not (cc.get_id() == 'gcc' and host_machine.system() == 'windows')
+    _trial += ['-Werror=format', '-Wformat-security']
+  endif
+  foreach a : _trial
     if cpp.has_argument(a)
       cpp_args += a
     endif
@@ -974,20 +987,6 @@ else
     c_vis_args += '-fvisibility=hidden'
   endif
 
-  foreach a : ['-Werror=return-type',
-               '-Werror=format',
-               '-Wformat-security',
-               '-Wno-non-virtual-dtor',
-               '-Wno-missing-field-initializers',
-               '-Wno-format-truncation',
-               '-fno-math-errno',
-               '-fno-trapping-math',
-               '-Qunused-arguments']
-    if cpp.has_argument(a)
-      cpp_args += a
-    endif
-  endforeach
-
   # Check for C and C++ arguments for MSVC2013 compatibility. These are only
   # used in parts of the mesa code base that need to compile with old versions
   # of MSVC, mainly common code