app-text/mandoc: Fixed build with make-4.3

Closes: https://bugs.gentoo.org/706024
Package-Manager: Portage-2.3.85, Repoman-2.3.20
Signed-off-by: Lars Wendler <polynomial-c@gentoo.org>

app-text/mandoc/mandoc-1.14.5.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2019 Gentoo Authors
+# Copyright 1999-2020 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI="6"
@@ -28,6 +28,13 @@ src_prepare() {
 		-e '/^db-install:/s:$: base-install:' \
 		Makefile || die
 
+	# make-4.3 doesn't like the CC line (bug #706024)
+	# and "echo -n" is not portable
+	sed \
+		-e "s@^\(CC=\).*\$@\1\"$(tc-getCC)\"@" \
+		-e 's@echo -n@printf@g' \
+		-i configure || die
+
 	cat <<-EOF > "configure.local"
 		PREFIX="${EPREFIX}/usr"
 		BINDIR="${EPREFIX}/usr/bin"