@@ -600,6 +600,12 @@ Warn when a @code{pragma()} is encountered that is not understood by
where a pragma that is part of the D language, but not implemented by
the compiler, won't get reported.
+@item -Wno-varargs
+@cindex Wvarargs
+@cindex Wno-varargs
+Do not warn upon questionable usage of the macros used to handle variable
+arguments like @code{va_start}.
+
@item -fignore-unknown-pragmas
@cindex @option{-fignore-unknown-pragmas}
@cindex @option{-fno-ignore-unknown-pragmas}
@@ -146,6 +146,10 @@ Wunknown-pragmas
D LangEnabledBy(D, Wall)
; Documented in C
+Wvarargs
+D
+; Documented in C
+
X
D
Generate JSON file.
new file mode 100644
@@ -0,0 +1,18 @@
+// { dg-do compile }
+
+import core.stdc.stdarg;
+
+void
+error (int a)
+{
+ va_list vp;
+ va_start (vp, a); // { dg-error "used in function with fixed arguments" }
+}
+
+void
+warn (int a, int b, ...)
+{
+ va_list vp;
+ va_start (vp, a); // { dg-warning "second parameter" }
+ va_end (vp);
+}
new file mode 100644
@@ -0,0 +1,19 @@
+// { dg-options "-Wno-varargs" }
+// { dg-do compile }
+
+import core.stdc.stdarg;
+
+void
+error (int a)
+{
+ va_list vp;
+ va_start (vp, a); // { dg-error "used in function with fixed arguments" }
+}
+
+void
+warn (int a, int b, ...)
+{
+ va_list vp;
+ va_start (vp, a); // No warning because of -Wno-varargs in effect.
+ va_end (vp);
+}