--- /dev/null
+Accept relative paths to AR as well.
+
+https://bugs.gentoo.org/720966
+--- a/configure.in
++++ b/configure.in
+@@ -105,7 +105,7 @@ AC_LIBTOOL_WIN32_DLL
+ AC_PROG_LIBTOOL
+ AC_PROG_INSTALL
+ AC_PROG_LN_S
+-AC_PATH_PROG(AR, ar, no)
++AC_CHECK_PROG(AR, ar, no)
+ if [[ $AR = "no" ]] ; then
+ AC_MSG_ERROR("Could not find ar - needed to create a library")
+ fi
--- /dev/null
+# Copyright 1999-2020 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+inherit autotools multilib-minimal
+
+DESCRIPTION="A free, cross-platform, open-source, audio I/O library"
+HOMEPAGE="http://www.portaudio.com/"
+SRC_URI="http://www.portaudio.com/archives/pa_stable_v190600_20161030.tgz
+ https://sources.debian.org/data/main/p/portaudio19/19.6.0-1/debian/patches/audacity-portmixer.patch -> ${PN}-19.06.00-audacity-portmixer.patch"
+
+LICENSE="MIT"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~mips ~ppc ~ppc64 ~sparc ~x86 ~amd64-linux ~x86-linux"
+IUSE="alsa +cxx debug doc jack oss static-libs"
+
+RDEPEND="alsa? ( >=media-libs/alsa-lib-1.0.27.2[${MULTILIB_USEDEP}] )
+ jack? ( virtual/jack[${MULTILIB_USEDEP}] )"
+DEPEND="${RDEPEND}"
+BDEPEND="
+ doc? ( app-doc/doxygen )
+ virtual/pkgconfig
+"
+
+S="${WORKDIR}/${PN}"
+
+DOCS=( README.txt )
+
+PATCHES=(
+ "${DISTDIR}/${PN}-19.06.00-audacity-portmixer.patch"
+ "${FILESDIR}"/${PN}-19.06.00-AR.patch # bug #720966, trigger reconf
+)
+
+src_prepare() {
+ default
+
+ eautoconf
+}
+
+multilib_src_configure() {
+ local myeconfargs=(
+ $(use_enable debug debug-output)
+ $(use_enable cxx)
+ $(use_enable static-libs static)
+ $(use_with alsa)
+ $(use_with jack)
+ $(use_with oss)
+ )
+
+ ECONF_SOURCE="${S}" econf "${myeconfargs[@]}"
+}
+
+multilib_src_compile() {
+ # workaround parallel build issue
+ emake lib/libportaudio.la
+ emake
+}
+
+src_compile() {
+ multilib-minimal_src_compile
+
+ if use doc; then
+ doxygen -u Doxyfile || die
+ doxygen Doxyfile || die
+ fi
+}
+
+multilib_src_install_all() {
+ einstalldocs
+ use doc && dodoc -r doc/html
+ find "${ED}" -name "*.la" -delete || die
+}