openvdb: fix build on platforms without 64-bit atomics

srcpkgs/openvdb/template

@@ -13,6 +13,15 @@ homepage="https://openvdb.org"
 distfiles="https://github.com/AcademySoftwareFoundation/openvdb/archive/v${version}.tar.gz"
 checksum=97bc8ae35ef7ccbf49a4e25cb73e8c2eccae6b235bac86f2150707efcd1e910d
 
+if [ "$XBPS_TARGET_NO_ATOMIC8" ]; then
+	makedepends+=" libatomic-devel"
+fi
+
+post_patch() {
+	[ "$XBPS_TARGET_NO_ATOMIC8" ] || return 0
+	vsed -i 's,ZLIB::ZLIB,ZLIB::ZLIB atomic,' openvdb/CMakeLists.txt
+}
+
 post_install() {
 	vlicense LICENSE
 }