shareLib.h

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/*************************************************************************\
* Copyright (c) 2012 UChicago Argonne LLC, as Operator of Argonne
* National Laboratory.
* Copyright (c) 2002 The Regents of the University of California, as
* Operator of Los Alamos National Laboratory.
* SPDX-License-Identifier: EPICS
* EPICS BASE is distributed subject to a Software License Agreement found
* in file LICENSE that is included with this distribution.
\*************************************************************************/
#undef epicsShareExtern
#undef epicsShareDef
#undef epicsShareClass
#undef epicsShareFunc
#undef epicsShareAPI
#undef READONLY

#if defined(_WIN32) || defined(__CYGWIN__)
/*
 * Check if EPICS_BUILD_DLL or EPICS_CALL_DLL defined and use the dllimport/
 * dllexport keywords if this is a shared library build of base under WIN32.
 */

# if defined(epicsExportSharedSymbols)
# if defined(EPICS_BUILD_DLL)
# define epicsShareExtern __declspec(dllexport) extern
# define epicsShareClass __declspec(dllexport)
# define epicsShareFunc __declspec(dllexport)
# else
# define epicsShareExtern extern
# define epicsShareClass
# define epicsShareFunc
# endif
# else
# if defined(EPICS_CALL_DLL)
# define epicsShareExtern __declspec(dllimport) extern
# define epicsShareClass __declspec(dllimport)
# define epicsShareFunc __declspec(dllimport)
# else
# define epicsShareExtern extern
# define epicsShareClass
# define epicsShareFunc
# endif
# endif
# define epicsShareDef
# define epicsShareAPI __stdcall /* function removes arguments */
# define READONLY const

#elif __GNUC__ >= 4
/*
 * See http://gcc.gnu.org/wiki/Visibility
 * For these to work, gcc must be given the flag
 * -fvisibility=hidden
 * and g++ the flags
 * -fvisibility=hidden -fvisibility-inlines-hidden
 */

# define epicsShareExtern __attribute__ ((visibility("default"))) extern
# define epicsShareClass __attribute__ ((visibility("default")))
# define epicsShareFunc __attribute__ ((visibility("default")))

# define epicsShareDef
# define epicsShareAPI
# if defined(__STDC__) || defined (__cplusplus)
# define READONLY const
# else
# define READONLY
# endif

/*
 * if its the old VAX C Compiler (not DEC C)
 */
#elif defined(VAXC)

 /*
 * VAXC creates FORTRAN common blocks when
 * we use "extern int fred"/"int fred=4". Therefore,
 * the initialization is not loaded unless we
 * call a function in that object module.
 *
 * DEC CXX does not have this problem.
 * We suspect (but do not know) that DEC C
 * also does not have this problem.
 */
# define epicsShareExtern globalref
# define epicsShareDef globaldef
# define READONLY const
# define epicsShareClass
# define epicsShareFunc
# define epicsShareAPI

#else

/* else => no import/export specifiers */

# define epicsShareExtern extern
# define epicsShareAPI
# define epicsShareClass
# define epicsShareDef

# define epicsShareFunc
# if defined(__STDC__) || defined (__cplusplus)
# define READONLY const
# else
# define READONLY
# endif

#endif

#ifndef INLINE_defs_EPICS
#define INLINE_defs_EPICS
# ifndef __cplusplus
# if defined (__GNUC__)
# define INLINE static __inline__
# elif defined (_MSC_VER)
# define INLINE __inline
# elif defined (_SUNPRO_C)
# pragma error_messages (off, E_EXTERN_PRIOR_REDECL_STATIC)
# define INLINE static
# else
# define INLINE static
# endif
# endif /* ifndef __cplusplus */
#endif /* ifdef INLINE_defs_EPICS */