commit e0f5bcd9091a5f7abd423fce9f372c8079849a64
Author: Sam James <sam@gentoo.org>
Date:   Thu Nov 17 22:03:25 2022 +0000

    gram.y: Fix -Wimplicit-function-declaration
    
    Clang 16 makes -Wimplicit-function-declaration an error by default.
    
    For more information, see LWN.net [0] or LLVM's Discourse [1], the Gentoo wiki [2],
    or the (new) c-std-porting mailing list [3].
    
    [0] https://lwn.net/Articles/913505/
    [1] https://discourse.llvm.org/t/configure-script-breakage-with-the-new-werror-implicit-function-declaration/65213
    [2] https://wiki.gentoo.org/wiki/Modern_C_porting
    [3] hosted at lists.linux.dev.
    
    Bug: https://bugs.gentoo.org/880823
    Signed-off-by: Sam James <sam@gentoo.org>

diff --git a/gram.y b/gram.y
index 4115390c249ab62b..2b142125e9dd05ae 100644
--- a/gram.y
+++ b/gram.y
@@ -20,6 +20,10 @@
 
 #define YYERROR_VERBOSE 1
 
+int yylex (void);
+void yyset_in (FILE * _in_str);
+int yylex_destroy (void);
+
 #if 0 /* no longer necessary? */
 #ifndef HAVE_IN6_ADDR_S6_ADDR
 # ifdef __FreeBSD__