print/tex-luatex: Avoid mixing libc++ and libstdc++, and don't use -fcommon

This port was not respecting the CC and CXX variables, thus it could
pick up gcc and g++ instead, and that would cause mixups between
libstdc++ (which is preferred by gcc) and libc++ (which is in base),
ultimately leading to link errors.

Also, the port uses a very old version of tex so it suffers from a few
-fno-common issues, mostly variables that have been declared without an
'extern' specifier. Add a few patches to fix these.

Appproved by:	maintainer timeout
PR:		234221
MFH:		2021Q2

print/tex-luatex/Makefile

@@ -1,6 +1,6 @@
 PORTNAME=	luatex
 PORTVERSION=	0.80.0
-PORTREVISION=	23
+PORTREVISION=	24
 CATEGORIES=	print
 MASTER_SITES=	ftp://tug.org/historic/systems/texlive/2015/
 PKGNAMEPREFIX=	tex-
@@ -72,14 +72,12 @@ CONFIGURE_ARGS+=--with-system-$L \
 		--with-$L-include=${LOCALBASE}/include \
 		--with-$L-libdir=${LOCALBASE}/lib
 .endfor
+CONFIGURE_ARGS+=CC="${CC}" \
+		CXX="${CXX}"
 CPPFLAGS+=	-I${LOCALBASE}/include
 MAKE_JOBS_UNSAFE=	yes
 TEX_FORMATS=	luatex
 
-# Fix build on recent current -- our tex is so outdated,
-# that it's unlikely that any upstream patches apply.
-CFLAGS+=	-fcommon
-
 # buildenv and dumpenv in Makefile uses hard-coded TEXMFCNF.
 post-extract:
 	cd ${WRKSRC}/.. && \

print/tex-luatex/files/patch-luatexdir_font_luatexfont.h

@@ -0,0 +1,11 @@
+--- luatexdir/font/luatexfont.h.orig	2015-03-20 07:59:58 UTC
++++ luatexdir/font/luatexfont.h
+@@ -149,8 +149,6 @@ void replace_packet_fonts(internal_font_number f, int 
+                           int *new_fontid, int count);
+ int *packet_local_fonts(internal_font_number f, int *num);
+ 
+-int packet_cur_s;               /* current |do_vf_packet()| recursion level */
+-int packet_stack_ptr;           /* pointer into |packet_stack| */
+ vf_struct *new_vfstruct(void);
+ 
+ /* writecff.c */

print/tex-luatex/files/patch-luatexdir_image_writeimg.h

@@ -0,0 +1,11 @@
+--- luatexdir/image/writeimg.h.orig	2015-03-20 07:59:58 UTC
++++ luatexdir/image/writeimg.h
+@@ -27,7 +27,7 @@
+ #  include "pdf/pdfpage.h"
+ 
+ typedef image_dict *idict_entry;
+-idict_entry *idict_array;
++extern idict_entry *idict_array;
+ 
+ void new_img_pdfstream_struct(image_dict *);
+ image *new_image(void);

print/tex-luatex/files/patch-luatexdir_image_writeimg.w

@@ -0,0 +1,11 @@
+--- luatexdir/image/writeimg.w.orig	2015-03-20 07:59:58 UTC
++++ luatexdir/image/writeimg.w
+@@ -125,6 +125,8 @@
+ #define HEADER_PDF "%PDF-1."
+ #define MAX_HEADER (sizeof(HEADER_PNG)-1)
+ 
++idict_entry *idict_array;
++
+ static void check_type_by_header(image_dict * idict)
+ {
+     int i;

print/tex-luatex/files/patch-luatexdir_pdf_pdftables.h

@@ -0,0 +1,11 @@
+--- luatexdir/pdf/pdftables.h.orig	2015-03-20 07:59:58 UTC
++++ luatexdir/pdf/pdftables.h
+@@ -21,7 +21,7 @@
+ #ifndef PDFTABLES_H
+ #  define PDFTABLES_H
+ 
+-const char *pdf_obj_typenames[PDF_OBJ_TYPE_MAX + 1];
++extern const char *pdf_obj_typenames[PDF_OBJ_TYPE_MAX + 1];
+ 
+ typedef enum {
+     union_type_int,

print/tex-luatex/files/patch-luatexdir_tex_textoken.w

@@ -0,0 +1,11 @@
+--- luatexdir/tex/textoken.w.orig	2015-03-28 00:34:27 UTC
++++ luatexdir/tex/textoken.w
+@@ -75,7 +75,7 @@ maximum memory usage. When code between the delimiters
+ report these statistics when |tracing_stats| is sufficiently large.
+ 
+ @c
+-int var_used, dyn_used;         /* how much memory is in use */
++int dyn_used;                   /* how much memory is in use */
+ 
+ halfword avail;                 /* head of the list of available one-word nodes */
+ unsigned fix_mem_end;           /* the last one-word node used in |mem| */