__declspec(dllexport) & __declspec(dllimport) - platformunabhängig?

Mr X

Hallo,
Sind __declspec(dllexport) und __declspec(dllimport) platform, bzw. compilerunabhängig?

Wenn nein, was ist die platformunabhängige Alternative?

devkid

Nö.

devkid@desktop:~$ cat so.c
__declspec(dllexport) void foo ()
{
}
devkid@desktop:~$ gcc -shared so.c
so.c: In Funktion »__declspec«:
so.c:2: Fehler: expected »=«, »,«, »;«, »asm« or »__attribute__« before »{« token
so.c:3: Fehler: expected »{« at end of input

Brauchst du bei anderen System als Windows nicht.

ich includiere immer in jede headerDatei das hier zuerst:
die 3 links ganz oben sind ganz sinnvoll bei sowas.

Gruß

Martin

#ifndef COMPILERSETTINGS_H
#define COMPILERSETTINGS_H
// @see http://gcc.gnu.org/wiki/Visibility
// @see http://people.redhat.com/drepper/dsohowto.pdf
// @see http://www.eventhelix.com/RealtimeMantra/HeaderFileIncludePatterns.htm

// Generic helper definitions for shared library support
#if defined(_WIN32) || defined(__CYGWIN__)
#	if defined(_MSC_VER)   // Windows && MS Visual C
#		if _MSC_VER < 1310	//Version < 7.1?
#			pragma message ("Compiling with a Visual C compiler version < 7.1 (2003) has not been tested!")
#		endif // Version > 7.1
#		define MYLIB_HELPER_DLL_IMPORT __declspec(dllimport)
#		define MYLIB_HELPER_DLL_EXPORT __declspec(dllexport)
#		define MYLIB_HELPER_DLL_LOCAL
#	elif defined (__GNUC__)
#		define MYLIB_HELPER_DLL_IMPORT __attribute__((dllimport))
#		define MYLIB_HELPER_DLL_EXPORT __attribute__((dllexport))
#		define MYLIB_HELPER_DLL_LOCAL
#	endif
#	define BOOST_ALL_NO_LIB  //disable the msvc automatic boost-lib selection in order to link against the static libs!
#elif defined(__linux__) || defined(linux) || defined(__linux)
#	if __GNUC__ >= 4	// TODO Makefile: add -fvisibility=hidden to compiler parameter in Linux version
#		define MYLIB_HELPER_DLL_IMPORT __attribute__ ((visibility("default")))
#		define MYLIB_HELPER_DLL_EXPORT __attribute__ ((visibility("default")))
#		define MYLIB_HELPER_DLL_LOCAL  __attribute__ ((visibility("hidden")))
#	else
#		define MYLIB_HELPER_DLL_IMPORT
#		define MYLIB_HELPER_DLL_EXPORT
#		define MYLIB_HELPER_DLL_LOCAL
#	endif
#endif

// Now we use the generic helper definitions above to define MYLIB_API and MYLIB_LOCAL.
// MYLIB_API is used for the public API symbols. It either DLL imports or DLL exports (or does nothing for static build)
// MYLIB_LOCAL is used for non-api symbols.

#ifndef MYLIB_DLL
#define MYLIB_DLL
#endif
// TODO Makefile: add MYLIB_DLL and EXPORTS
#ifdef MYLIB_DLL // defined if MYLIB is compiled as a DLL
#	ifdef MYLIB_DLL_EXPORTS // defined if we are building the MYLIB DLL (instead of using it)
#		define DLL_PUBLIC MYLIB_HELPER_DLL_EXPORT
#	else
#		define DLL_PUBLIC MYLIB_HELPER_DLL_IMPORT
#	endif // MYLIB_DLL_EXPORTS
#		define DLL_LOCAL MYLIB_HELPER_DLL_LOCAL
#	else // MYLIB_DLL is not defined: this means MYLIB is a static lib.
#		define DLL_PUBLIC
#		define DLL_LOCAL
#endif // MYLIB_DLL

// disable some nasty MSVC Warnings
#ifdef _MSC_VER   // Windows && MS Visual C
#		pragma warning( disable : 4996 ) 	// disable deprecation warnings
//#		pragma warning( disable : 4091 )	// disable typedef warning without variable declaration
#		pragma warning( disable : 4275 )    // non – DLL-interface classkey 'identifier' used as base for DLL-interface classkey 'identifier'
#		pragma warning( disable : 4251 )    // like warning above but for templates (like std::string)
#endif

#endif //COMPILERSETTINGS_H

__declspec(dllexport) &amp; __declspec(dllimport) - platformunabhängig?

declspec(dllexport) & declspec(dllimport) - platformunabhängig?