-# setenv.m4 serial 12
-dnl Copyright (C) 2001-2004, 2006-2009 Free Software Foundation, Inc.
+# setenv.m4 serial 16
+dnl Copyright (C) 2001-2004, 2006-2010 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
[AC_RUN_IFELSE([AC_LANG_PROGRAM([[
#include <stdlib.h>
#include <errno.h>
+ #include <string.h>
]], [[
- if (setenv (NULL, "", 0) != -1) return 1;
+ if (setenv ("", "", 0) != -1) return 1;
if (errno != EINVAL) return 2;
if (setenv ("a", "=", 1) != 0) return 3;
if (strcmp (getenv ("a"), "=") != 0) return 4;
AC_LIBOBJ([unsetenv])
gl_PREREQ_UNSETENV
else
+ dnl Some BSDs return void, failing to do error checking.
AC_CACHE_CHECK([for unsetenv() return type], [gt_cv_func_unsetenv_ret],
[AC_TRY_COMPILE([#include <stdlib.h>
extern
REPLACE_UNSETENV=1
AC_LIBOBJ([unsetenv])
fi
+
+ dnl Solaris 10 unsetenv does not remove all copies of a name.
+ AC_CACHE_CHECK([whether unsetenv works on duplicates],
+ [gl_cv_func_unsetenv_works],
+ [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+ #include <stdlib.h>
+ ]], [[
+ char entry[] = "b=2";
+ if (putenv ((char *) "a=1")) return 1;
+ if (putenv (entry)) return 2;
+ entry[0] = 'a';
+ unsetenv ("a");
+ if (getenv ("a")) return 3;
+ ]])],
+ [gl_cv_func_unsetenv_works=yes], [gl_cv_func_unsetenv_works=no],
+ [gl_cv_func_unsetenv_works="guessing no"])])
+ if test "$gl_cv_func_unsetenv_works" != yes; then
+ REPLACE_UNSETENV=1
+ AC_LIBOBJ([unsetenv])
+ fi
fi
])