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5b79e16a32
On some systems, lt_preloaded_symbols may not be declared
const due to relocation issues. C99 requires qualification to
match for compatible declarations, so ensure we declare
const'ness in the same way everywhere; link-time optimization
may otherwise rightfully complain about inconsistencies.
Since ltdl.h may not depend upon config.h, rely on system
defines for choosing const'ness.
* NEWS: Update.
* doc/libtool.texi (Dlpreopening): Document this issue.
* libltdl/config/ltmain.m4sh (func_generate_dlsyms):
[__WINDOWS__, __CYGWIN__, _WIN32_WCE]: Define LT_DLSYM_CONST
according to system defines. Remove old shell cruft. Use
LT_DLSYM_CONST for lt_${my_prefix}_LTX_preloaded_symbols.
* libltdl/libltdl/lt_system.h (LT_DLSYM_CONST): Likewise,
define LT_DLSYM_CONST according to system defines.
* tests/demo/foo.h (LT_DLSYM_CONST): Likewise.
* tests/pdemo/foo.h (LT_DLSYM_CONST): Likewise.
* tests/demo/dlmain.c (lt_dlsymlist): Use LT_DLSYM_CONST.
* tests/pdemo/longer_file_name_dlmain.c (lt_dlsymlist):
Likewise.
* libltdl/m4/libtool.m4 (_LT_CMD_GLOBAL_SYMBOLS): Likewise
for configure test code.
* libltdl/ltdl.c (preloaded_symbols): Use LT_DLSYM_CONST.
* libltdl/ltdl.h (LTDL_SET_PRELOADED_SYMBOLS): Likewise.
Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>
108 lines
3.4 KiB
C
108 lines
3.4 KiB
C
/* foo.h -- interface to the libfoo library
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Copyright (C) 1996-1999, 2010 Free Software Foundation, Inc.
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Written by Gord Matzigkeit, 1996
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This file is part of GNU Libtool.
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GNU Libtool is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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GNU Libtool is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Libtool; see the file COPYING. If not, a copy
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can be downloaded from http://www.gnu.org/licenses/gpl.html,
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or obtained by writing to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/* Only include this header file once. */
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#ifndef _FOO_H_
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#define _FOO_H_ 1
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/* At some point, cygwin will stop defining __CYGWIN32__, but b19 and
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* earlier do not define __CYGWIN__. This snippit allows us to check
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* for __CYGWIN32__ reliably for both old and (probable) future releases.
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*/
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#ifdef __CYGWIN__
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# ifndef __CYGWIN32__
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# define __CYGWIN32__
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# endif
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#endif
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/* __BEGIN_DECLS should be used at the beginning of your declarations,
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so that C++ compilers don't mangle their names. Use __END_DECLS at
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the end of C declarations. */
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#undef __BEGIN_DECLS
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#undef __END_DECLS
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#ifdef __cplusplus
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# define __BEGIN_DECLS extern "C" {
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# define __END_DECLS }
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#else
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# define __BEGIN_DECLS /* empty */
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# define __END_DECLS /* empty */
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#endif
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/* LTDL_PARAMS is a macro used to wrap function prototypes, so that compilers
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that don't understand ANSI C prototypes still work, and ANSI C
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compilers can issue warnings about type mismatches. */
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#undef LTDL_PARAMS
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#if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(__CYGWIN32__) || defined(__cplusplus)
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# define LT_PARAMS(protos) protos
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# define lt_ptr_t void*
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#else
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# define LT_PARAMS(protos) ()
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# define lt_ptr_t char*
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#endif
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/* Keep this code in sync between libtool.m4, ltmain, lt_system.h, and tests. */
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#if defined(__WINDOWS__) || defined(__CYGWIN__) || defined(_WIN32_WCE)
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/* DATA imports from DLLs on WIN32 con't be const, because runtime
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relocations are performed -- see ld's documentation on pseudo-relocs. */
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# define LT_DLSYM_CONST
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#elif defined(__osf__)
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/* This system does not cope well with relocations in const data. */
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# define LT_DLSYM_CONST
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#else
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# define LT_DLSYM_CONST const
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#endif
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#ifdef __CYGWIN32__
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# ifdef LIBFOO_DLL
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/* need some (as yet non-existant) automake magic to tell
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* the object whether the libfoo it will be linked with is
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* a dll or not, ie whether LIBFOO_DLL is defined or not.
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*/
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# ifdef _LIBFOO_COMPILATION_
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# define EXTERN __declspec(dllexport)
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# else
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# define EXTERN extern __declspec(dllimport)
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# endif
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# else
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# define EXTERN extern
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# endif
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#else
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# define EXTERN extern
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#endif
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/* Silly constants that the functions return. */
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#define HELLO_RET 0xe110
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#define FOO_RET 0xf00
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/* Declarations. Note the wonderful use of the above macros. */
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__BEGIN_DECLS
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int foo LT_PARAMS((void));
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int foo2 LT_PARAMS((void));
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int hello LT_PARAMS((void));
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EXTERN int nothing;
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__END_DECLS
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#endif /* !_FOO_H_ */
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