dev-scheme/guile: Fix breakage with GCC 5 (bug #560736)

Preprocessor changes in GCC 5 cause guile-snarf to output garbage.

Gentoo-Bug: https://bugs.gentoo.org/560736

dev-scheme/guile/files/guile-1.8.8-gcc5.patch

@@ -0,0 +1,15 @@
+Preprocessor changes in GCC 5 cause guile-snarf to output garbage.
+
+https://bugs.gentoo.org/560736
+
+--- a/libguile/guile-snarf.in
++++ b/libguile/guile-snarf.in
+@@ -50,7 +50,7 @@
+     ## Apparently, AIX's preprocessor is unhappy if you try to #include an
+     ## empty file.
+     echo "/* cpp arguments: $@ */" ;
+-    ${cpp} -DSCM_MAGIC_SNARF_INITS -DSCM_MAGIC_SNARFER "$@" > ${temp} && cpp_ok_p=true
++    ${cpp} -P -DSCM_MAGIC_SNARF_INITS -DSCM_MAGIC_SNARFER "$@" > ${temp} && cpp_ok_p=true
+     grep "^ *\^ *\^" ${temp} | sed -e "s/^ *\^ *\^//" -e "s/\^\ *:\ *\^.*/;/"
+ }
+ 

dev-scheme/guile/guile-1.8.8-r2.ebuild

@@ -0,0 +1,116 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+inherit eutils autotools flag-o-matic elisp-common
+
+DESCRIPTION="Scheme interpreter"
+HOMEPAGE="https://www.gnu.org/software/guile/"
+SRC_URI="mirror://gnu/guile/${P}.tar.gz"
+
+LICENSE="LGPL-2.1"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~m68k ~mips ~ppc ~ppc64 ~s390 ~sh ~sparc ~x86 ~ppc-aix ~amd64-fbsd ~x86-fbsd ~x86-interix ~amd64-linux ~arm-linux ~x86-linux ~ppc-macos ~x64-macos ~x86-macos"
+IUSE="networking +regex discouraged +deprecated emacs nls debug-freelist debug-malloc debug +threads"
+RESTRICT="!regex? ( test )"
+
+RDEPEND="
+	>=dev-libs/gmp-4.1:0=
+	>=sys-devel/libtool-1.5.6
+	sys-devel/gettext
+	sys-libs/ncurses:0=
+	emacs? ( virtual/emacs )"
+DEPEND="${RDEPEND}
+	sys-apps/texinfo"
+
+# Guile seems to contain some slotting support, /usr/share/guile/ is slotted,
+# but there are lots of collisions. Most in /usr/share/libguile. Therefore
+# I'm slotting this in the same slot as guile-1.6* for now.
+SLOT="12"
+MAJOR="1.8"
+
+src_prepare() {
+	epatch "${FILESDIR}/${P}-fix_guile-config.patch" \
+		"${FILESDIR}/${P}-gcc46.patch" \
+		"${FILESDIR}/${P}-gcc5.patch" \
+		"${FILESDIR}/${P}-makeinfo-5.patch" \
+		"${FILESDIR}/${P}-gtexinfo-5.patch"
+	sed \
+		-e "s/AM_CONFIG_HEADER/AC_CONFIG_HEADERS/g" \
+		-e "/AM_PROG_CC_STDC/d" \
+		-i guile-readline/configure.in
+	eautoreconf
+}
+
+src_configure() {
+	# see bug #178499
+	filter-flags -ftree-vectorize
+
+	#will fail for me if posix is disabled or without modules -- hkBst
+	econf \
+		--disable-error-on-warning \
+		--disable-static \
+		--enable-posix \
+		$(use_enable networking) \
+		$(use_enable regex) \
+		$(use deprecated || use_enable discouraged) \
+		$(use_enable deprecated) \
+		$(use_enable emacs elisp) \
+		$(use_enable nls) \
+		--disable-rpath \
+		$(use_enable debug-freelist) \
+		$(use_enable debug-malloc) \
+		$(use_enable debug guile-debug) \
+		$(use_with threads) \
+		--with-modules \
+		EMACS=no
+}
+
+src_compile()  {
+	emake
+
+	# Above we have disabled the build system's Emacs support;
+	# for USE=emacs we compile (and install) the files manually
+	if use emacs; then
+		cd emacs
+		elisp-compile *.el || die
+	fi
+}
+
+src_install() {
+	einstall
+
+	dodoc AUTHORS ChangeLog GUILE-VERSION HACKING NEWS README THANKS
+
+	# texmacs needs this, closing bug #23493
+	dodir /etc/env.d
+	echo "GUILE_LOAD_PATH=\"${EPREFIX}/usr/share/guile/${MAJOR}\"" > "${ED}"/etc/env.d/50guile
+
+	# necessary for registering slib, see bug 206896
+	keepdir /usr/share/guile/site
+
+	if use emacs; then
+		elisp-install ${PN} emacs/*.{el,elc} || die
+		elisp-site-file-install "${FILESDIR}/50${PN}-gentoo.el" || die
+	fi
+}
+
+pkg_postinst() {
+	[ "${EROOT}" == "/" ] && pkg_config
+	use emacs && elisp-site-regen
+}
+
+pkg_postrm() {
+	use emacs && elisp-site-regen
+}
+
+pkg_config() {
+	if has_version dev-scheme/slib; then
+		einfo "Registering slib with guile"
+		install_slib_for_guile
+	fi
+}
+
+_pkg_prerm() {
+	rm -f "${EROOT}"/usr/share/guile/site/slibcat
+}