[cstdarg.syn] Directly index contents of header synopsis

Author: AlisdairM

source/support.tex

@@ -5993,21 +5993,16 @@
 \rSec2[cstdarg.syn]{Header \tcode{<cstdarg>} synopsis}
 
 \indexheader{cstdarg}%
-\indexlibraryglobal{va_list}%
-\indexlibraryglobal{va_start}%
-\indexlibraryglobal{va_copy}%
-\indexlibraryglobal{va_end}%
-\indexlibraryglobal{va_arg}%
 \begin{codeblock}
 // all freestanding
 namespace std {
-  using va_list = @\seebelow@;
+  using @\libglobal{va_list}@ = @\seebelow@;
 }
 
-#define va_arg(V, P) @\seebelow@
-#define va_copy(VDST, VSRC) @\seebelow@
-#define va_end(V) @\seebelow@
-#define va_start(V, P) @\seebelow@
+#define @\libmacro{va_arg}@(V, P) @\seebelow@
+#define @\libmacro{va_copy}@(VDST, VSRC) @\seebelow@
+#define @\libmacro{va_end}@(V) @\seebelow@
+#define @\libmacro{va_start}@(V, P) @\seebelow@
 \end{codeblock}
 
 \pnum