From a02d4e78531550b4ff658aa6fff8806f05715330 Mon Sep 17 00:00:00 2001
From: Jason Thorpe <thorpej@me.com>
Date: Sun, 3 Mar 2024 07:54:39 -0800
Subject: [PATCH] Tweak the FreeBSD version of proc_self_dirname() to work on
 NetBSD use it.

---
 kernel/yosys.cc | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/kernel/yosys.cc b/kernel/yosys.cc
index 20f9791c6..57433d0d9 100644
--- a/kernel/yosys.cc
+++ b/kernel/yosys.cc
@@ -55,7 +55,7 @@
 #  include <glob.h>
 #endif
 
-#ifdef __FreeBSD__
+#if defined(__FreeBSD__) || defined(__NetBSD__)
 #  include <sys/sysctl.h>
 #endif
 
@@ -901,10 +901,14 @@ std::string proc_self_dirname()
 		buflen--;
 	return std::string(path, buflen);
 }
-#elif defined(__FreeBSD__)
+#elif defined(__FreeBSD__) || defined(__NetBSD__)
 std::string proc_self_dirname()
 {
+#ifdef __NetBSD__
+	int mib[4] = {CTL_KERN, KERN_PROC_ARGS, getpid(), KERN_PROC_PATHNAME};
+#else
 	int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};
+#endif
 	size_t buflen;
 	char *buffer;
 	std::string path;