--- /dev/null
+Fix errors caused by -Wformat -Werror=format-security
+https://bugs.gentoo.org/show_bug.cgi?id=542134
+
+* xvpbm.c:888:4: error: format not a string literal and no format arguments [-Werror=format-security]
+* if (*pix) fprintf(fp,str1);
+
+--- xv-3.10a/xvpbm.c
++++ xv-3.10a/xvpbm.c
+@@ -885,8 +885,8 @@
+ }
+ }
+ else {
+- if (*pix) fprintf(fp,str1);
+- else fprintf(fp,str0);
++ if (*pix) fprintf(fp,"%s",str1);
++ else fprintf(fp,"%s",str0);
+ len+=2;
+ if (len>68) { fprintf(fp,"\n"); len=0; }
+ }
--- /dev/null
+# Copyright 1999-2016 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=6
+
+inherit eutils flag-o-matic
+
+JUMBOV=20070520
+DESCRIPTION="Interactive image manipulation program supporting a wide variety of formats"
+HOMEPAGE="http://www.trilon.com/xv/index.html http://www.sonic.net/~roelofs/greg_xv.html"
+SRC_URI="mirror://sourceforge/png-mng/${P}-jumbo-patches-${JUMBOV}.tar.gz
+ ftp://ftp.cis.upenn.edu/pub/xv/${P}.tar.gz
+ mirror://gentoo/${P}.png.bz2"
+
+LICENSE="xv"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~sparc ~x86 ~x86-fbsd ~x86-freebsd ~amd64-linux ~x86-linux ~ppc-macos"
+IUSE="jpeg tiff png"
+
+DEPEND="x11-libs/libXt
+ jpeg? ( virtual/jpeg:0 )
+ tiff? ( media-libs/tiff:0 )
+ png? ( >=media-libs/libpng-1.2:0= sys-libs/zlib )"
+RDEPEND="${DEPEND}"
+
+PATCHES=(
+ "${WORKDIR}/${P}-jumbo-fix-enh-patch-${JUMBOV}.txt"
+ "${FILESDIR}/${P}-osx-bsd-${JUMBOV}.patch"
+ "${FILESDIR}/${P}-vdcomp-osx-${JUMBOV}.patch"
+ "${FILESDIR}/${P}-disable-jp2k-${JUMBOV}.patch"
+ "${FILESDIR}/${P}-fix-wait-${JUMBOV}.patch"
+ "${FILESDIR}/${P}-add-ldflags-${JUMBOV}.patch"
+ "${FILESDIR}/${P}-libpng15-r1.patch"
+ "${FILESDIR}/${P}-wformat-security.patch"
+)
+
+src_prepare() {
+ default
+
+ append-cppflags -DUSE_GETCWD -DLINUX -DUSLEEP
+ use jpeg && append-cppflags -DDOJPEG
+ use png && append-cppflags -DDOPNG
+ use tiff && append-cppflags -DDOTIFF -DUSE_TILED_TIFF_BOTLEFT_FIX
+
+ # Link with various image libraries depending on use flags
+ IMAGE_LIBS=""
+ use jpeg && IMAGE_LIBS="${IMAGE_LIBS} -ljpeg"
+ use png && IMAGE_LIBS="${IMAGE_LIBS} -lz -lpng"
+ use tiff && IMAGE_LIBS="${IMAGE_LIBS} -ltiff"
+
+ sed -i \
+ -e 's/\(^JPEG.*\)/#\1/g' \
+ -e 's/\(^PNG.*\)/#\1/g' \
+ -e 's/\(^TIFF.*\)/#\1/g' \
+ -e "s/\(^LIBS = .*\)/\1${IMAGE_LIBS}/g" Makefile || die
+
+ # /usr/bin/gzip => /bin/gzip
+ sed -i -e 's#/usr\(/bin/gzip\)#'"${EPREFIX}"'\1#g' config.h || die
+
+ # Fix installation of ps docs
+ sed -i -e 's#$(DESTDIR)$(LIBDIR)#$(LIBDIR)#g' Makefile || die
+}
+
+src_compile() {
+ emake \
+ CC="$(tc-getCC)" CCOPTS="${CFLAGS}" LDFLAGS="${LDFLAGS}" \
+ PREFIX="${EPREFIX}"/usr \
+ DOCDIR="${EPREFIX}/usr/share/doc/${PF}" \
+ LIBDIR="${T}"
+}
+
+src_install() {
+ dodir /usr/bin
+ dodir /usr/share/man/man1
+
+ emake \
+ DESTDIR="${D}" \
+ PREFIX="${EPREFIX}"/usr \
+ DOCDIR="${EPREFIX}/usr/share/doc/${PF}" \
+ LIBDIR="${T}" install
+
+ dodoc CHANGELOG BUGS IDEAS
+ newicon "${WORKDIR}"/${P}.png ${PN}.png
+ make_desktop_entry xv "" "" "Graphics;Viewer"
+}