sci-mathematics/mathomatic: update EAPI 6 -> 8

Closes: https://bugs.gentoo.org/805899
Closes: https://bugs.gentoo.org/810325
Signed-off-by: David Seifert <soap@gentoo.org>

sci-mathematics/mathomatic/mathomatic-16.0.5-r1.ebuild

@@ -1,29 +1,32 @@
 # Copyright 1999-2022 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
-EAPI=6
+EAPI=8
+
 inherit toolchain-funcs flag-o-matic
 
 DESCRIPTION="Automatic algebraic manipulator"
 HOMEPAGE="https://github.com/mfillpot/mathomatic"
 SRC_URI="https://github.com/mfillpot/mathomatic/archive/${P}.tar.gz"
+S="${WORKDIR}/${PN}-${P}"
 
 LICENSE="LGPL-2.1"
 SLOT="0"
 KEYWORDS="amd64 ~ppc x86 ~amd64-linux ~x86-linux"
 IUSE="doc gnuplot"
 
-DEPEND="sys-libs/readline:=
+DEPEND="
+	sys-libs/readline:=
 	sys-libs/ncurses:="
 RDEPEND="${DEPEND}
 	gnuplot? ( sci-visualization/gnuplot )"
-
-S="${WORKDIR}/${PN}-${P}"
+BDEPEND="doc? ( app-text/htmldoc )"
 
 src_compile() {
 	append-cflags -DBOLD_COLOR=1
 	emake READLINE=1 CC="$(tc-getCC)"
 	emake CC="$(tc-getCC)" -C primes
+	use doc && emake pdf
 }
 
 src_test() {
@@ -32,12 +35,15 @@ src_test() {
 }
 
 src_install() {
-	emake prefix="${EPREFIX}/usr" DESTDIR="${D}" bininstall m4install
-	emake prefix="${EPREFIX}/usr" DESTDIR="${D}" -C primes install
+	emake DESTDIR="${D}" prefix="${EPREFIX}"/usr \
+		mathdocdir="${EPREFIX}"/usr/share/doc/${PF} \
+		bininstall m4install
+	emake DESTDIR="${D}" prefix="${EPREFIX}"/usr -C primes install
 	dodoc changes.txt README.txt AUTHORS
 	newdoc primes/README.txt README-primes.txt
 	use doc && emake \
-		prefix="${EPREFIX}/usr" \
-		mathdocdir="${EPREFIX}/usr/share/doc/${PF}" \
-		DESTDIR="${D}" docinstall
+		DESTDIR="${D}" \
+		prefix="${EPREFIX}"/usr \
+		mathdocdir="${EPREFIX}"/usr/share/doc/${PF} \
+		docinstall
 }