stockfish: use upstream's cxxflags, fix ftbfs

srcpkgs/stockfish/template

@@ -1,12 +1,13 @@
 # Template file for 'stockfish'
 pkgname=stockfish
 version=12
-revision=1
+revision=2
 _net_file=nn-82215d0fd0df.nnue
 wrksrc="Stockfish-sf_${version}"
 build_wrksrc=src
 build_style=gnu-makefile
 make_build_target=build
+make_use_env=yes
 hostmakedepends="tar"
 short_desc="Free UCI chess engine derived from Glaurung"
 maintainer="cipr3s <cipr3s@gmx.com>"
@@ -20,6 +21,9 @@ skip_extraction="${_net_file}"
 
 LDFLAGS+="-lpthread -Wl,-z,stack-size=2097152"
 
+# We know how to optimize ourselves
+make_build_args="optimize=no "
+
 case $XBPS_TARGET_MACHINE in
 	x86_64*) make_build_args+="ARCH=x86-64" ;;
 	i686*) make_build_args+="ARCH=x86-32" ;;
@@ -28,6 +32,7 @@ case $XBPS_TARGET_MACHINE in
 	armv7*) make_build_args+="ARCH=armv7" ;;
 	ppc64*) make_build_args+="ARCH=ppc-64" ;;
 	ppc*) make_build_args+="ARCH=ppc-32" ;;
+	*) broken="Not supported" ;;
 esac
 
 if [ "$XBPS_TARGET_NO_ATOMIC8" ]; then
@@ -39,6 +44,10 @@ post_extract() {
 	cp $XBPS_SRCDISTDIR/${pkgname}-${version}/${_net_file} ./src
 }
 
+post_patch() {
+	vsed -i -e '/CXX=/d' Makefile
+}
+
 do_install() {
 	vbin stockfish
 }