include: Provide a definition of NOP_FUNCTION that works on GCC.

NOP_FUNCTION is a drop-in function replacement that ignores its arguments but also suppresses compiler warnings about them being unused. For example, on MSVC, 0(foo, bar, baz()); or __noop(foo, bar, baz()); would suppress warnings about foo and bar being unused and not call baz at all. Neither of those syntaxes is supported on GCC, which provides no similar way to suppress unused variable warnings, but we can at least allow such code to compile by defining NOP_FUNCTION to be an empty variadic macro. Signed-off-by: Alex Henrie <alexhenrie24@gmail.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

include: Provide a definition of NOP_FUNCTION that works on GCC.
3ad4def4 · Alex Henrie · Alexandre Julliard · 1cad3c00 · 3ad4def4
Commit 3ad4def4 authored Sep 08, 2021 by Alex Henrie Committed by Alexandre Julliard Sep 09, 2021
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winnt.h include/winnt.h +7 -3

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--- a/include/winnt.h
+++ b/include/winnt.h
@@ -123,10 +123,14 @@ extern "C" {
 #endif

 #ifndef NOP_FUNCTION
-# if defined(_MSC_VER) && (_MSC_VER >= 1210)
-#  define NOP_FUNCTION __noop
+# if defined(_MSC_VER)
+#  if (_MSC_VER >= 1210)
+#   define NOP_FUNCTION __noop
+#  else
+#   define NOP_FUNCTION (void)0
+#  endif
 # else
-#  define NOP_FUNCTION (void)0
+#  define NOP_FUNCTION(...)
 # endif
 #endif