From ff4b83917aa3cfb2eb1a992bd5104b2ed6cc3102 Mon Sep 17 00:00:00 2001
From: Kevin Ryde <user42@zip.com.au>
Date: Wed, 11 Jun 2003 23:43:03 +0000
Subject: [PATCH] (scm_putenv): Add freebsd to comment about need to use
 unsetenv.

---
 libguile/posix.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/libguile/posix.c b/libguile/posix.c
index 4ff99911b..bd3c2fe97 100644
--- a/libguile/posix.c
+++ b/libguile/posix.c
@@ -1166,8 +1166,9 @@ SCM_DEFINE (scm_putenv, "putenv", 1, 0, 0,
     {
 #ifdef HAVE_UNSETENV
       /* No '=' in argument means we should remove the variable from
-	 the environment.  Not all putenvs understand this.  To be
-	 safe, we do it explicitely using unsetenv. */
+	 the environment.  Not all putenvs understand this (for instance
+	 FreeBSD 4.8 doesn't).  To be safe, we do it explicitely using
+	 unsetenv. */
       unsetenv (SCM_STRING_CHARS (str));
 #else
       /* On e.g. Win32 hosts putenv() called with 'name=' removes the