/* Provide relocatable packages.   Copyright (C) 2003, 2005 Free Software Foundation, Inc.   Written by Bruno Haible <bruno@clisp.org>, 2003.   This program is free software; you can redistribute it and/or modify it   under the terms of the GNU Library General Public License as published   by the Free Software Foundation; either version 2, or (at your option)   any later version.   This program 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   Library General Public License for more details.   You should have received a copy of the GNU Library General Public   License along with this program; if not, write to the Free Software   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,   USA.  */#ifndef _RELOCATABLE_H#define _RELOCATABLE_H#ifdef __cplusplusextern "C" {#endif/* This can be enabled through the configure --enable-relocatable option.  */#if ENABLE_RELOCATABLE/* When building a DLL, we must export some functions.  Note that because   this is a private .h file, we don't need to use __declspec(dllimport)   in any case.  */#if HAVE_VISIBILITY && BUILDING_DLL# define RELOCATABLE_DLL_EXPORTED __attribute__((__visibility__("default")))#elif defined _MSC_VER && BUILDING_DLL# define RELOCATABLE_DLL_EXPORTED __declspec(dllexport)#else# define RELOCATABLE_DLL_EXPORTED#endif/* Sets the original and the current installation prefix of the package.   Relocation simply replaces a pathname starting with the original prefix   by the corresponding pathname with the current prefix instead.  Both   prefixes should be directory names without trailing slash (i.e. use ""   instead of "/").  */extern RELOCATABLE_DLL_EXPORTED void       set_relocation_prefix (const char *orig_prefix,			      const char *curr_prefix);/* Returns the pathname, relocated according to the current installation   directory.  */extern const char * relocate (const char *pathname);/* Memory management: relocate() leaks memory, because it has to construct   a fresh pathname.  If this is a problem because your program calls   relocate() frequently, think about caching the result.  *//* Convenience function:   Computes the current installation prefix, based on the original   installation prefix, the original installation directory of a particular   file, and the current pathname of this file.  Returns NULL upon failure.  */extern const char * compute_curr_prefix (const char *orig_installprefix,					 const char *orig_installdir,					 const char *curr_pathname);#else/* By default, we use the hardwired pathnames.  */#define relocate(pathname) (pathname)#endif#ifdef __cplusplus}#endif#endif /* _RELOCATABLE_H */