busybox/libbb/ptr_to_globals.c

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/* vi: set sw=4 ts=4: */
/*
* Copyright (C) 2008 by Denys Vlasenko <vda.linux@googlemail.com>
*
* Licensed under GPLv2, see file LICENSE in this source tree.
*/
#include <errno.h>
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struct globals;
#ifndef GCC_COMBINE
/* We cheat here. It is declared as const ptr in libbb.h,
* but here we make it live in R/W memory */
struct globals *ptr_to_globals;
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#ifdef __GLIBC__
int *bb_errno;
#endif
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#else
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/* gcc -combine will see through and complain */
/* Using alternative method which is more likely to break
* on weird architectures, compilers, linkers and so on */
struct globals *const ptr_to_globals __attribute__ ((section (".data")));
#ifdef __GLIBC__
int *const bb_errno __attribute__ ((section (".data")));
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#endif
#endif