$NetBSD: patch-src_Makevars,v 1.1 2026/05/26 13:46:53 mef Exp $

symbol backtrace_symbols is defined in /usr/lib/libexecinfo

--- src/Makevars.orig	2023-02-14 22:58:59.000000000 +0900
+++ src/Makevars	2026-05-26 22:43:31.573177454 +0900
@@ -1,4 +1,12 @@
 ## -*- mode: makefile; -*-
 
+UNAME := $(shell uname)
+
 PKG_CPPFLAGS = -I../inst/include -I.
 PKG_LIBS = $(LAPACK_LIBS) $(BLAS_LIBS) $(FLIBS)
+
+ifneq ($(UNAME), Linux)
+ifneq ($(UNAME), SunOS)
+PKG_LIBS += -lexecinfo
+endif
+endif
