https://bugs.gentoo.org/show_bug.cgi?id=513428
https://bugs.gentoo.org/show_bug.cgi?id=536764
https://trac.macports.org/ticket/44170

--- libffi-3.2.1/src/x86/win32.S
+++ libffi-3.2.1/src/x86/win32.S
@@ -1184,7 +1184,6 @@
 
 #if defined(X86_WIN32) && !defined(__OS2__)
         .section	.eh_frame,"w"
-#endif
 .Lframe1:
 .LSCIE1:
         .long	.LECIE1-.LASCIE1  /* Length of Common Information Entry */
@@ -1343,6 +1342,7 @@
         /* End of DW_CFA_xxx CFI instructions.  */
         .align 4
 .LEFDE5:
+#endif /* defined(X86_WIN32) && !defined(__OS2__), for the eh_frame */
 
 #endif /* !_MSC_VER */