From: Bruno Haible <bruno@clisp.org>
Date: Sun, 5 Jun 2011 12:32:56 +0000 (+0200)
Subject: unsetenv: Avoid gcc warning.
X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6f88ff35bd7cbf4d48212a0eda501613c595904d;p=pspp

unsetenv: Avoid gcc warning.

* lib/unsetenv.c (unsetenv): Provide declaration if system lacks it.
---

diff --git a/ChangeLog b/ChangeLog
index 5fdf8a49f5..d41786cb96 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2011-06-05  Bruno Haible  <bruno@clisp.org>
+
+	unsetenv: Avoid gcc warning.
+	* lib/unsetenv.c (unsetenv): Provide declaration if system lacks it.
+
 2011-06-05  Bruno Haible  <bruno@clisp.org>
 
 	setenv: Avoid gcc warning.
diff --git a/lib/unsetenv.c b/lib/unsetenv.c
index 215bba0646..16b50d15e3 100644
--- a/lib/unsetenv.c
+++ b/lib/unsetenv.c
@@ -97,6 +97,13 @@ weak_alias (__unsetenv, unsetenv)
 #else /* HAVE_UNSETENV */
 
 # undef unsetenv
+# if !HAVE_DECL_UNSETENV
+#  if VOID_UNSETENV
+extern void unsetenv (const char *);
+#  else
+extern int unsetenv (const char *);
+#  endif
+# endif
 
 /* Call the underlying unsetenv, in case there is hidden bookkeeping
    that needs updating beyond just modifying environ.  */