sys-boot/elilo: fix build failure on ia64 against gnu-efi-3.0.6

Disambiguate setpjmp()/longjmp()/jmp_buf implementation across
elilo copy and gnu-efi-3.0.6.

To avoid behaviour change I'm keeping elilo's implementation for now
as the jmp_buf passing ABI is slightly different across the two.

```
  setjmp.h:25:14: error: conflicting types for 'jmp_buf'
   typedef long jmp_buf[_JBLEN] __attribute__ ((aligned (16)));
                ^~~~~~~
  In file included from /usr/include/efi/efisetjmp.h:5:0,
                   from /usr/include/efi/efi.h:60,
                   from gzip.c:29:
  /usr/include/efi/ia64/efisetjmp_arch.h:45:23: note: previous
    declaration of 'jmp_buf' was here
   } ALIGN(JMPBUF_ALIGN) jmp_buf;
                         ^~~~~~~
```

Reported-by: Stanton Arch
Package-Manager: Portage-2.3.28, Repoman-2.3.9

1 files changed, 88 insertions, 0 deletions

diff --git a/sys-boot/elilo/elilo-3.16-r2.ebuild b/sys-boot/elilo/elilo-3.16-r2.ebuild
new file mode 100644
index 000000000000..840e7f568f8e
--- /dev/null
+++ b/sys-boot/elilo/elilo-3.16-r2.ebuild
@@ -0,0 +1,88 @@
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+inherit toolchain-funcs eutils multilib
+
+DESCRIPTION="Linux boot loader for EFI-based systems such as IA-64"
+HOMEPAGE="https://sourceforge.net/projects/elilo/"
+SRC_URI="mirror://sourceforge/elilo/${P}-all.tar.gz
+	mirror://debian/pool/main/e/elilo/elilo_3.14-3.debian.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="0"
+KEYWORDS="~amd64 ~ia64 ~x86"
+IUSE=""
+
+# gnu-efi contains only static libs, so there's no run-time dep on it
+DEPEND=">=sys-boot/gnu-efi-3.0g
+	dev-util/patchutils"
+# dosfstools[compat] to enable 'dosfsck' symlink
+RDEPEND="sys-boot/efibootmgr
+	sys-fs/dosfstools[compat]"
+
+S="${WORKDIR}/${P}-source"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-3.16-elilo-loop.patch #299665
+	"${FILESDIR}"/${PN}-3.16-gnu-efi-3.0.6-ia64.patch
+)
+
+src_unpack() {
+	unpack ${A} ./${P}-source.tar.gz
+	mv debian "${S}"/ || die
+}
+
+src_prepare() {
+	default
+
+	case $(tc-arch) in
+	ia64)  iarch=ia64 ;;
+	x86)   iarch=ia32 ;;
+	amd64) iarch=x86_64 ;;
+	*)     die "unknown architecture: $(tc-arch)" ;;
+	esac
+
+	# Now Gentooize it.
+	sed -i \
+		-e '1s:/bin/sh:/bin/bash:' \
+		-e "s:##VERSION##:${PV}:" \
+		-e 's:Debian GNU/:Gentoo :g' \
+		-e 's:Debian:Gentoo:g' \
+		-e 's:debian:gentoo:g' \
+		-e "s:dpkg --print-architecture:echo ${iarch}:" \
+		debian/elilo.sh || die
+}
+
+src_compile() {
+	# "prefix" on the next line specifies where to find gcc, as, ld,
+	# etc.  It's not the usual meaning of "prefix".  By blanking it we
+	# allow PATH to be searched.
+	local libdir="${SYSROOT}${EPREFIX}/usr/$(get_libdir)"
+	emake -j1 \
+		prefix= \
+		AS="$(tc-getAS)" \
+		CC="$(tc-getCC)" \
+		LD="$(tc-getLD)" \
+		HOSTARCH=${iarch} \
+		ARCH=${iarch} \
+		EFIINC="${SYSROOT}${EPREFIX}/usr/include/efi" \
+		GNUEFILIB="${libdir}" \
+		EFILIB="${libdir}" \
+		EFICRT0="${libdir}"
+}
+
+src_install() {
+	exeinto /usr/lib/elilo
+	doexe elilo.efi
+
+	newsbin debian/elilo.sh elilo
+	dosbin tools/eliloalt
+
+	insinto /etc
+	newins "${FILESDIR}"/elilo.conf.sample elilo.conf
+
+	dodoc docs/* "${FILESDIR}"/elilo.conf.sample
+	doman debian/*.[0-9]
+}