dev-libs/memkind: respect AR

Closes: https://bugs.gentoo.org/799452
Signed-off-by: Alessandro Barbieri <lssndrbarbieri@gmail.com>

dev-libs/memkind/files/memkind-respect-ar.patch

@@ -0,0 +1,11 @@
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -518,7 +518,7 @@
+ endef
+ 
+ static_lib: libmemkind.la
+-	bash -c "ar -M < <(echo -e '$(ar_prog)')"
++	bash -c "${AR} -M < <(echo -e '$(ar_prog)')"
+ 	cp libmemkind.a .libs/
+ 	rm libmemkind.a
+ 

dev-libs/memkind/memkind-1.11.0-r1.ebuild

@@ -5,7 +5,7 @@ EAPI=8
 
 PYTHON_COMPAT=( python3_{8..10} pypy3 )
 
-inherit autotools linux-info python-any-r1
+inherit autotools linux-info python-any-r1 toolchain-funcs
 
 DESCRIPTION="user extensible heap manager built on top of jemalloc"
 HOMEPAGE="https://memkind.github.io/memkind"
@@ -25,6 +25,7 @@ DEPEND="
 	${PYTHON_DEPS}
 "
 
+PATCHES=( "${FILESDIR}/${PN}-respect-ar.patch" )
 RESTRICT="test" # ERROR: ./test/test.sh requires a NUMA enabled system with more than one node.
 #RESTRICT="!test? ( test )"
 
@@ -35,6 +36,7 @@ src_prepare() {
 }
 
 src_configure() {
+	tc-export AR
 	local myconf=(
 		--disable-silent-rules
 		--enable-shared