setenv: Avoid gcc warning.

[gnulib.git] / lib / setenv.c

diff --git a/lib/setenv.c b/lib/setenv.c
index 5ad22c5..0a5f67d 100644 (file)
--- a/lib/setenv.c
+++ b/lib/setenv.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1992,1995-1999,2000-2003,2005-2009 Free Software Foundation, Inc.
+/* Copyright (C) 1992, 1995-2003, 2005-2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    This program is free software: you can redistribute it and/or modify
@@ -15,8 +15,14 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #if !_LIBC
+# define _GL_USE_STDLIB_ALLOC 1
 # include <config.h>
 #endif
+
+/* Don't use __attribute__ __nonnull__ in this compilation unit.  Otherwise gcc
+   optimizes away the name == NULL test below.  */
+#define _GL_ARG_NONNULL(params)
+
 #include <alloca.h>
 
 /* Specification.  */
@@ -107,8 +113,8 @@ int
 __add_to_environ (const char *name, const char *value, const char *combined,
                   int replace)
 {
-  register char **ep;
-  register size_t size;
+  char **ep;
+  size_t size;
   const size_t namelen = strlen (name);
   const size_t vallen = value != NULL ? strlen (value) + 1 : 0;
 
@@ -142,6 +148,9 @@ __add_to_environ (const char *name, const char *value, const char *combined,
                    : realloc (last_environ, (size + 2) * sizeof (char *)));
       if (new_environ == NULL)
         {
+          /* It's easier to set errno to ENOMEM than to rely on the
+             'malloc-posix' and 'realloc-posix' gnulib modules.  */
+          __set_errno (ENOMEM);
           UNLOCK;
           return -1;
         }
@@ -244,7 +253,7 @@ __add_to_environ (const char *name, const char *value, const char *combined,
           if (np == NULL)
 #endif
             {
-              np = malloc (namelen + 1 + vallen);
+              np = (char *) malloc (namelen + 1 + vallen);
               if (np == NULL)
                 {
 #if defined USE_TSEARCH && !defined _LIBC
@@ -341,6 +350,9 @@ weak_alias (__clearenv, clearenv)
 #if HAVE_SETENV
 
 # undef setenv
+# if !HAVE_DECL_SETENV
+extern int setenv (const char *, const char *, int);
+# endif
 # define STREQ(a, b) (strcmp (a, b) == 0)
 
 int