Only forward declare '_mm_pause' if it is used

Richard Copley · Richard Copley · commit 7cd37f60cfde · 2026-03-11T09:53:04.000Z
diff --git a/include/stdexec/stop_token.hpp b/include/stdexec/stop_token.hpp
@@ -29,7 +29,9 @@
 #  include <stop_token>  // IWYU pragma: export
 #endif
 
+#if defined(_MSC_VER) && (defined(_M_IX86) || defined(_M_X64))
 extern void _mm_pause();
+#endif
 
 namespace STDEXEC::__stok
 {

Original file line number	Diff line number	Diff line change
`@@ -29,7 +29,9 @@`
`29`	`29`	`# include <stop_token> // IWYU pragma: export`
`30`	`30`	`#endif`
`31`	`31`
	`32`	`+#if defined(_MSC_VER) && (defined(_M_IX86) \|\| defined(_M_X64))`
`32`	`33`	`extern void _mm_pause();`
	`34`	`+#endif`
`33`	`35`
`34`	`36`	`namespace STDEXEC::__stok`
`35`	`37`	`{`