From 3699e50e003549b9b19955e07516753cd90a665a Mon Sep 17 00:00:00 2001
From: Mahmoud Al-Qudsi <mqudsi@neosmart.net>
Date: Fri, 20 Nov 2020 15:49:57 -0600
Subject: [PATCH] Explicitly check for KERN_PROC_PATHNAME

While FreeBSD, DragonflyBSD, and NetBSD have KERN_PROC_PATHNAME,
OpenBSD does not.
---
 src/common.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/common.cpp b/src/common.cpp
index 7dad9f72d..f30b81e2f 100644
--- a/src/common.cpp
+++ b/src/common.cpp
@@ -1995,7 +1995,7 @@ std::string get_executable_path(const char *argv0) {
     // https://opensource.apple.com/source/adv_cmds/adv_cmds-163/ps/print.c
     uint32_t buffSize = sizeof buff;
     if (_NSGetExecutablePath(buff, &buffSize) == 0) return std::string(buff);
-#elif defined(__BSD__)
+#elif defined(__BSD__) && defined(KERN_PROC_PATHNAME)
     // BSDs do not have /proc by default, (although it can be mounted as procfs via the Linux
     // compatibility layer). We can use sysctl instead: per sysctl(3), passing in a process ID of -1
     // returns the value for the current process.