math/p5-Text-AsciiTeX: fix build with -fno-common

Turn a variable definition in a header file into a declaration and
move the definition to a source file.  This fixes the build on
FreeBSD 13+.

Approved by:	portmgr (build fix blanket)

math/p5-Text-AsciiTeX/Makefile

@@ -1,6 +1,6 @@
 PORTNAME=	Text-AsciiTeX
 PORTVERSION=	0.05
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	math perl5
 MASTER_SITES=	CPAN
 PKGNAMEPREFIX=	p5-
@@ -9,9 +9,6 @@ MAINTAINER=	perl@FreeBSD.org
 COMMENT=	Convert (La)TeX formulas to ASCII art
 WWW=		https://metacpan.org/release/Text-AsciiTeX
 
-BROKEN_FreeBSD_13=	error: duplicate symbol: SYNTAX_ERR_FLAG
-BROKEN_FreeBSD_14=	error: duplicate symbol: SYNTAX_ERR_FLAG
-
 LICENSE=	ART10 GPLv1+
 LICENSE_COMB=	dual
 

math/p5-Text-AsciiTeX/files/patch-src_asciitex_asciiTeX.c

@@ -0,0 +1,10 @@
+--- src/asciitex/asciiTeX.c.orig	2023-04-16 15:12:02 UTC
++++ src/asciitex/asciiTeX.c
+@@ -38,6 +38,7 @@
+ #include "dim.h"
+ #include "utils.h"
+ 
++STAT SYNTAX_ERR_FLAG;
+ char ** messages;
+ int Nmes;
+ int Nall;

math/p5-Text-AsciiTeX/files/patch-src_asciitex_asciiTeX__struct.h

@@ -0,0 +1,9 @@
+--- src/asciitex/asciiTeX_struct.h.orig	2023-04-16 15:11:41 UTC
++++ src/asciitex/asciiTeX_struct.h
+@@ -56,5 +56,5 @@ struct Tgraph {			/* the order of fields is important-
+ };
+ 
+ typedef enum {S_NOERR, S_WARN, S_ERR} STAT;
+-STAT SYNTAX_ERR_FLAG;
++extern STAT SYNTAX_ERR_FLAG;
+ #endif