https://github.com/termux/termux-packages/issues/15852
Borrowed from https://github.com/gentoo/gentoo/blob/f9f2aed0b0a013a41482148a0224d14f70ea6818/app-text/dictd/files/dictd-1.13.0-lex.patch

From: orbea <orbea@riseup.net>
Date: Sat, 18 Jun 2022 09:10:18 -0700
Subject: [PATCH] build: Fix implicit function declarations

--- a/clientparse.y
+++ b/clientparse.y
@@ -24,6 +24,9 @@
 #define YYERROR_VERBOSE
 
 static dictServer *s;
+
+int yylex();
+void yyerror(const char *s);
 %}
 
 %union {
--- a/servparse.y
+++ b/servparse.y
@@ -30,6 +30,9 @@
 
 static dictDatabase *db;
 
+int yylex();
+void yyerror(const char *s);
+
 static int string2bool (const char *str)
 {
    if (