===============================================================================
Subject: Honour AR/CXX from environment
Bug:     https://bugs.gentoo.org/720964
From:    Gavin Pryke <gavinlee303@gmail.com>
===============================================================================
diff -Naru -x '*.swp' rtaudio-5.1.0.orig/configure.ac rtaudio-5.1.0/configure.ac
--- rtaudio-5.1.0.orig/configure.ac	2019-04-18 01:24:28.000000000 +0100
+++ rtaudio-5.1.0/configure.ac	2020-12-22 11:37:19.689983090 +0000
@@ -67,10 +67,11 @@
 AS_IF([test "x$CFLAGS" = "x" ], [override_c=yes], [override_c=no])
 
 # Checks for programs.
-AC_PROG_CXX(g++ CC c++ cxx)
-AM_PROG_AR
-AC_PATH_PROG(AR, ar, no)
-AS_IF([test "x${AR}" = "xno" ], [
+# inherit from environment first then pick standard command names,
+# this is to keep distributions happy that allow overrides for toolchain.
+AC_PROG_CXX(["$CXX" g++ c++ cxx])
+AM_PROG_AR(["$AR" ar])
+AS_IF([test "x${AR}" = "x" ], [
     AC_MSG_ERROR([Could not find ar - needed to create a library])
 ])