This is c language only port. Specifying this fixes lib-depends-check
on sparc64 showing Extra: estdc++.19

okay?
Index: Makefile
===================================================================
RCS file: /cvs/ports/audio/libmysofa/Makefile,v
retrieving revision 1.3
diff -u -p -u -r1.3 Makefile
--- Makefile	11 Mar 2022 18:20:15 -0000	1.3
+++ Makefile	21 Dec 2024 18:59:17 -0000
@@ -6,6 +6,8 @@ GH_ACCOUNT=	hoene
 GH_PROJECT=	libmysofa
 GH_TAGNAME=	v${VER}
 
+REVISION=	0
+
 SHARED_LIBS=	mysofa	0.0
 
 HOMEPAGE=	https://github.com/hoene/libmysofa
@@ -18,6 +20,7 @@ PERMIT_PACKAGE=	Yes
 WANTLIB=	m z
 
 COMPILER=	base-clang ports-clang ports-gcc
+COMPILER_LANGS=	c
 
 MODULES=	devel/cmake