dev-libs/libatasmart: support cross-compiling

The strpool directory must be compiled natively.  The build system
makes an attempt to handle this by setting CC, AM_CFLAGS, etc., but
configure substitutes CFLAGS directly, so it winds up with CBUILD
CC and CHOST CFLAGS which breaks everything.  This just runs emake
in that directory while overriding flags with command arguments.

Package-Manager: Portage-3.0.9, Repoman-3.0.2
Signed-off-by: David Michael <fedora.dm0@gmail.com>
Signed-off-by: Mike Gilbert <floppym@gentoo.org>

dev-libs/libatasmart/libatasmart-0.19_p5.ebuild

@@ -3,6 +3,8 @@
 
 EAPI=7
 
+inherit toolchain-funcs
+
 DESCRIPTION="A small and lightweight parser library for ATA S.M.A.R.T. hard disks"
 HOMEPAGE="https://salsa.debian.org/utopia-team/libatasmart"
 SRC_URI="mirror://debian/pool/main/liba/${PN}/${PN}_${PV/_p*}.orig.tar.xz
@@ -15,9 +17,7 @@ IUSE="static-libs"
 
 RDEPEND="virtual/libudev:="
 DEPEND="${RDEPEND}"
-BDEPEND="
-	virtual/pkgconfig
-"
+BDEPEND="virtual/pkgconfig"
 
 S="${WORKDIR}/${P/_p*}"
 
@@ -34,6 +34,17 @@ src_configure() {
 	econf $(use_enable static-libs static)
 }
 
+src_compile() {
+	if tc-is-cross-compiler; then
+		tc-export_build_env
+		emake -C strpool strpool \
+			CFLAGS="${BUILD_CFLAGS}" \
+			CPPFLAGS="${BUILD_CPPFLAGS}" \
+			LDFLAGS="${BUILD_LDFLAGS}"
+	fi
+	emake
+}
+
 src_install() {
 	default
 	find "${ED}" -type f -name "*.la" -delete || die