https://github.com/libofx/libofx/commit/a647c1db417459bded7fb47af69dff375eae83c1

From a647c1db417459bded7fb47af69dff375eae83c1 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Sat, 6 Mar 2021 05:57:49 +0000
Subject: [PATCH] configure.ac: Respect --libdir for OpenSP

When searching for OpenSP, we want to use
the libdir passed in to autotools (--libdir)
to ensure that we find the library
for the correct ABI.

It is possible that we pick up the wrong
copy from e.g. /usr/lib/ where a 32-bit
copy of OpenSP exists
when we're in the middle of a 64-bit build.

Use ${libdir} to ensure we respect
any preferences/information given and
search for OpenSP in the right place.

Bug: https://bugs.gentoo.org/693458
Signed-off-by: Sam James <sam@gentoo.org>
--- a/configure.ac
+++ b/configure.ac
@@ -112,7 +112,7 @@ AC_ARG_WITH(opensp-libs,
 [  --with-opensp-libs=PATH         specify where to look for libosp
                                   - default is /usr/lib],
 			OPENSPLIBPATH="$with_opensp_libs",
-			OPENSPLIBPATH="/usr/lib")
+			OPENSPLIBPATH="${libdir}")
 
 			echo $OPENSPLIBPATH
 for d in /usr/include/OpenSP /usr/local/include/OpenSP /usr/include/sp/generic /usr/local/include/sp/generic; do