dev-scheme/scm: fix bug 596630, partial LDFLAGS fix, EAPI=7

LDFLAGS are now respected on the main build but
not plugins yet.  Ebuild is also bumped to EAPI=7 and several unused
eclass inherits are removed.
Closes: https://bugs.gentoo.org/596630

Package-Manager: Portage-2.3.40, Repoman-2.3.9

dev-scheme/scm/files/scm-5.5.6-respect-ldflags.patch

@@ -0,0 +1,12 @@
+diff -ur b/Makefile a/Makefile
+--- b/Makefile	2018-06-21 14:02:53.439716620 -0500
++++ a/Makefile	2018-06-21 14:03:33.900568504 -0500
+@@ -111,7 +111,7 @@
+ 
+ # SCMLIT -- try making this first!
+ scmlit:	$(ofiles) scmmain.o require.scm Makefile
+-	$(LD) -o scmlit $(ofiles) scmmain.o $(LIBS)
++	$(LD) $(LDFLAGS) -o scmlit $(ofiles) scmmain.o $(LIBS)
+ 	$(MAKE) checklit
+ scmflags.h:	scmflags
+ scmflags:

dev-scheme/scm/scm-5.5.6-r4.ebuild

@@ -0,0 +1,169 @@
+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+#version magic thanks to masterdriverz and UberLord using bash array instead of tr
+trarr="0abcdefghi"
+MY_PV="$(ver_cut 1)${trarr:$(ver_cut 2):1}$(ver_cut 3)"
+
+MY_P=${PN}-${MY_PV}
+S=${WORKDIR}/${PN}
+DESCRIPTION="SCM is a Scheme implementation from the author of slib"
+SRC_URI="http://groups.csail.mit.edu/mac/ftpdir/scm/${MY_P}.zip"
+HOMEPAGE="http://swiss.csail.mit.edu/~jaffer/SCM"
+
+SLOT="0"
+LICENSE="LGPL-3"
+KEYWORDS="~amd64 ~x86 ~amd64-linux ~x86-macos"
+IUSE="arrays bignums cautious dynamic-linking engineering-notation gsubr inexact ioext libscm macro ncurses posix readline regex sockets unix"
+
+BDEPEND="app-arch/unzip"
+DEPEND=">=dev-scheme/slib-3.1.5
+	dev-util/cproto
+	ncurses? ( sys-libs/ncurses:0= )
+	readline? ( sys-libs/libtermcap-compat )"
+RDEPEND="${DEPEND}"
+
+PATCHES=( "${FILESDIR}/${P}-multiplefixes.patch"
+	"${FILESDIR}/${P}-respect-ldflags.patch" )
+
+src_compile() {
+	# SLIB is required to build SCM.
+	local slibpath="${EPREFIX}/usr/share/slib/"
+	if [ -n "$SCHEME_LIBRARY_PATH" ]; then
+		einfo "using SLIB $SCHEME_LIBRARY_PATH"
+	elif [ -d ${slibpath} ]; then
+		export SCHEME_LIBRARY_PATH=${slibpath}
+	fi
+
+	einfo "Making scmlit"
+	emake -j1 scmlit clean
+
+	einfo "Building scm"
+	local features=""
+	use arrays && features+="arrays"
+	use bignums && features+=" bignums"
+	use cautious && features+=" cautious"
+	use engineering-notation && features+=" engineering-notation"
+	use inexact && features+=" inexact"
+	use macro && features+=" macro"
+
+	( use readline ||
+	  use ncurses ||
+	  use regex ||
+	  use posix ||
+	  use ioext ||
+	  use gsubr ||
+	  use sockets ||
+	  use unix ||
+	  use dynamic-linking ) && features+=" dynamic-linking"
+
+	./build \
+		--compiler-options="${CFLAGS}" \
+		--linker-options="${LDFLAGS} -L${EPREFIX}/$(get_libdir)" \
+		-s "${EPREFIX}"/usr/$(get_libdir)/scm \
+		-F ${features:="none"} \
+		-h system \
+		-o scm || die
+
+	einfo "Building DLLs"
+	if use readline; then
+		./build \
+			--compiler-options="${CFLAGS}" \
+			--linker-options="${LDFLAGS}" \
+			-h system \
+			-F edit-line \
+			-t dll || die
+	fi
+	if use ncurses ; then
+		./build \
+			--compiler-options="${CFLAGS}" \
+			--linker-options="${LDFLAGS}" \
+			-F curses \
+			-h system \
+			-t dll || die
+	fi
+	if use regex ; then
+		./build \
+			--compiler-options="${CFLAGS}" \
+			--linker-options="${LDFLAGS}" \
+			-c rgx.c \
+			-h system \
+			-t dll || die
+	fi
+	if use gsubr ; then
+		./build \
+			--compiler-options="${CFLAGS}" \
+			--linker-options="${LDFLAGS}" \
+			-c gsubr.c \
+			-h system \
+			-t dll || die
+	fi
+	if use ioext ; then
+		./build \
+			--compiler-options="${CFLAGS}" \
+			--linker-options="${LDFLAGS}" \
+			-c ioext.c \
+			-h system \
+			-t dll || die
+	fi
+	if use posix; then
+		./build \
+			--compiler-options="${CFLAGS}" \
+			--linker-options="${LDFLAGS}" \
+			-c posix.c \
+			-h system \
+			-t dll || die
+	fi
+	if use sockets ; then
+		./build \
+			--compiler-options="${CFLAGS}" \
+			--linker-options="${LDFLAGS}" \
+			-c socket.c \
+			-h system \
+			-t dll || die
+	fi
+	if use unix ; then
+		./build \
+			--compiler-options="${CFLAGS}" \
+			--linker-options="${LDFLAGS}" \
+			-c unix.c \
+			-h system \
+			-t dll || die
+	fi
+
+	if use libscm ; then
+		emake libscm.a
+	fi
+}
+
+src_test() {
+	emake check
+}
+
+src_install() {
+	emake DESTDIR="${D}" man1dir="${EPREFIX}"/usr/share/man/man1/ \
+		install
+
+	if use libscm; then
+		emake DESTDIR="${D}" libdir="${EPREFIX}"/usr/$(get_libdir)/ \
+			installlib
+	fi
+
+	doinfo scm.info
+	doinfo hobbit.info
+}
+
+regen_catalog() {
+	einfo "Regenerating catalog..."
+	scm -e "(require 'new-catalog)"
+}
+
+pkg_postinst() {
+	[ "${ROOT}" == "/" ] && regen_catalog
+}
+
+pkg_config() {
+	regen_catalog
+}