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authorRoland McGrath <roland@hack.frob.com>2014-03-14 10:44:34 -0700
committerRoland McGrath <roland@hack.frob.com>2014-03-14 11:32:51 -0700
commit498a22333b835a598ccaed4656e97a0ec3573665 (patch)
treef02f8e2d4dcf1a93467f0747c56af83c74300101 /include/stackinfo.h
parentc7de50250367167d8c9f35594b264f6a0af8dd0c (diff)
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Compile with -Wundef.
Diffstat (limited to 'include/stackinfo.h')
-rw-r--r--include/stackinfo.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/include/stackinfo.h b/include/stackinfo.h
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--- /dev/null
+++ b/include/stackinfo.h
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+/* Details about the machine's stack: wrapper header.
+ Copyright (C) 2014 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _INCLUDE_STACKINFO_H
+#define _INCLUDE_STACKINFO_H 1
+
+/* A sysdeps/.../stackinfo.h file defines details for the CPU.
+ It is obliged to define either _STACK_GROWS_DOWN or _STACK_GROWS_UP. */
+#include_next <stackinfo.h>
+
+#if defined _STACK_GROWS_DOWN && _STACK_GROWS_DOWN
+# ifdef _STACK_GROWS_UP
+# error "stackinfo.h should not define both!"
+# else
+# define _STACK_GROWS_UP 0
+# endif
+#elif defined _STACK_GROWS_UP && _STACK_GROWS_UP
+# ifdef _STACK_GROWS_DOWN
+# error "stackinfo.h should not define both!"
+# else
+# define _STACK_GROWS_DOWN 0
+# endif
+#else
+# error "stackinfo.h must define _STACK_GROWS_UP or _STACK_GROWS_DOWN!"
+#endif
+
+#endif /* include/stackinfo.h */