sys-apps/gentoo-functions: update for meson

Signed-off-by: Sam James <sam@gentoo.org>

sys-apps/gentoo-functions/gentoo-functions-9999.ebuild

@@ -11,20 +11,26 @@ else
 	KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~arm64-macos ~ppc-macos ~x64-macos ~x64-solaris"
 fi
 
-inherit toolchain-funcs flag-o-matic
+inherit meson
 
 DESCRIPTION="Base functions required by all Gentoo systems"
 HOMEPAGE="https://gitweb.gentoo.org/proj/gentoo-functions.git"
 
 LICENSE="GPL-2"
 SLOT="0"
+IUSE="test"
+RESTRICT="!test? ( test )"
 
 # Specifically needs GNU find, as well.
 RDEPEND=">=sys-apps/findutils-4.9"
 
 src_configure() {
-	tc-export CC
-	append-lfs-flags
-	export ROOTPREFIX="${EPREFIX}"
-	export PREFIX="${EPREFIX}/usr"
+	local emesonargs=(
+		# Deliberately avoid /usr as consumers assume we're at /lib/gentoo.
+		--prefix="${EPREFIX:-/}"
+		--mandir="${EPREFIX}/usr/share/man"
+		$(meson_use test tests)
+	)
+
+	meson_src_configure
 }