x11-misc/seetxt: fix build with gcc 10

Closes: https://bugs.gentoo.org/707402
Package-Manager: Portage-3.0.8, Repoman-3.0.2
Signed-off-by: Sam James <sam@gentoo.org>

x11-misc/seetxt/files/seetxt-0.72-fno-common.patch

@@ -0,0 +1,24 @@
+https://sources.debian.org/patches/see/0.72-7/40-fix_ftbfs.patch/
+https://bugs.gentoo.org/707402
+--- a/src/main.h
++++ b/src/main.h
+@@ -92,7 +92,8 @@ typedef struct {
+ struct matchspec {
+ 	int bgn;
+ 	int end;
+-} rgxp;
++};
++extern struct matchspec rgxp;
+ 
+ /* see.c */
+ void addtohistory (char *line);
+--- a/src/util.c
++++ b/src/util.c
+@@ -11,6 +11,7 @@ Public License along with this program.
+ #include "main.h"
+ 
+ char *EXDline, Me[64];
++struct matchspec rgxp;
+ 
+ int buflen (char *buffer) {
+ 	int blen = strlen(buffer), NofL=0, i;

x11-misc/seetxt/seetxt-0.72-r1.ebuild

@@ -1,9 +1,9 @@
-# Copyright 1999-2014 Gentoo Foundation
+# Copyright 1999-2020 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
-EAPI=5
+EAPI=7
 
-inherit autotools eutils
+inherit autotools
 
 DESCRIPTION="Clever, lightweight GUI text file and manual page viewer for X windows"
 HOMEPAGE="https://code.google.com/p/seetxt/ http://seetxt.sourceforge.net/"
@@ -12,16 +12,19 @@ SRC_URI="https://seetxt.googlecode.com/files/${P}.tar.bz2"
 LICENSE="GPL-3"
 SLOT="0"
 KEYWORDS="~amd64"
-IUSE=""
 
+BDEPEND="virtual/pkgconfig"
 RDEPEND="x11-libs/gtk+:2"
-DEPEND="${RDEPEND}
-	virtual/pkgconfig"
+DEPEND="${RDEPEND}"
+
+PATCHES=(
+	"${FILESDIR}/${PV}-0001-fix-linking.patch"
+	"${FILESDIR}/${PV}-0002-fix-shared-files-install.patch"
+	"${FILESDIR}/${PN}-0.72-fno-common.patch"
+)
 
 src_prepare() {
-	epatch \
-		"${FILESDIR}/${PV}-0001-fix-linking.patch" \
-		"${FILESDIR}/${PV}-0002-fix-shared-files-install.patch"
+	default
 	eautoreconf
 }