fix tumble -fno-common build

ok cwen@

graphics/tumble/Makefile

@@ -1,4 +1,4 @@
-# $OpenBSD: Makefile,v 1.1.1.1 2020/04/25 14:02:14 espie Exp $
+# $OpenBSD: Makefile,v 1.2 2021/02/02 06:53:29 jsg Exp $
 
 # author says so
 ONLY_FOR_ARCHS= ${LE_ARCHS}
@@ -8,6 +8,7 @@ COMMENT =	convert pictures into pdf book
 GH_PROJECT = 	tumble
 GH_ACCOUNT = 	brouhaha
 GH_TAGNAME = 	v0.36
+REVISION =	0
 
 CATEGORIES = 	graphics textproc
 

graphics/tumble/patches/patch-semantics_c

@@ -0,0 +1,16 @@
+$OpenBSD: patch-semantics_c,v 1.1 2021/02/02 06:53:29 jsg Exp $
+
+fix -fno-common build
+
+Index: semantics.c
+--- semantics.c.orig
++++ semantics.c
+@@ -119,7 +119,7 @@ typedef struct output_page_t
+ #endif
+ 
+ 
+-FILE *yyin;
++extern FILE *yyin;
+ int line;  /* line number in spec file */
+ 
+ int bookmark_level;

graphics/tumble/patches/patch-tumble_input_h

@@ -0,0 +1,13 @@
+$OpenBSD: patch-tumble_input_h,v 1.1 2021/02/02 06:53:29 jsg Exp $
+
+fix -fno-common build
+
+Index: tumble_input.h
+--- tumble_input.h.orig
++++ tumble_input.h
+@@ -71,4 +71,4 @@ void init_jpeg_handler (void);
+ void init_pbm_handler  (void);
+ void init_png_handler  (void);
+ 
+-input_handler_t blank_handler;
++extern input_handler_t blank_handler;