√99以上 __declspec(dllexport) gcc 255134-__declspec(dllexport) gcc

Dec 22, 15__declspec(dllexport) is required in order make symbols available in a DLL This can be done through CMake variable without using the macro Classes and functions we write need not use the macro to export __declspec(dllimport) is optional The headers we expose to clients or for internal use across DLLs will benefit from this__declspec(dllexport) int sum(int a, int b) {return a b;} NOTE A "c" file is not a selectable file type in Visual Studio 08 so you may have to manually enter the file extension You can select a cpp file when adding to your project, but make sure toBetter yet, if you have an OS obstraction layer you can use another #define instead of __declspec to completely insure that POSIX builds never have to worry about this stuff

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__declspec(dllexport) gcc

__declspec(dllexport) gcc-If a class is marked declspec(dllexport), any specializations of class templates in the class hierarchy are implicitly marked as declspec(dllexport) This means that class templates are explicitly instantiated and the class's members must be defined dllexport of a function exposes the function with its decorated name For C functions, this includes name manglingApr 10, 12In fact if I'm not mistaken, GCC now has synonyms for __declspec (dllexport/dllimport) so there may not even be a need to use the preprocessor to first establish which compiler is in use for the import/export macros mentioned above It all depends on which version of GCC you're using

Building Your Own C Application

Dllexport and inline methods From Geoff Worboys <geoff at telesiscomputing dot com dot au>I have searched and only found information specific to the fortran compiler I have also found one mention in a forum that said get rid of it That won't work for a file I need to make transportable between Windows and Linux systemsLearn more about `__declspec` In this article Microsoft Specific The extended attribute syntax for specifying storageclass information uses the __declspec keyword, which specifies that an instance of a given type is to be stored with a Microsoftspecific storageclass attribute listed below Examples of other storageclass modifiers include the static and extern keywords

Import C The corresponding object file now has this symbol but the linker removes it, since it is building an exe on windows, and I guess GNU GCC tool chain by default removes all symbols (I did not try to switch the toolchain to Microsoft linkexe at this point)Jul 24, 15For global data symbols, __declspec (dllimport) must still be used when compiling against the code in the DLL The symbol is exported from the DLL correctly and automatically, but the compiler needs to know that it is being imported from a DLL at compile time All other function symbols will be automatically exported and imported by callersNote that explicit use of the dllimport and dllexport attributes on members of an exportable class is prohibited dllexport Classes When you declare a class dllexport, all its member functions and static data members are exported You

(gcc/linux, solaris), there is no requirements to explicitly export symbols for shared objects, and I use the export attributes as a MSFT extension only when i compile with VS or VSintelApr 11, 21__declspec(dllexport) is a Windowsspecific feature and not available on Linux In order to fix it in a compatible way, add this code either in a header that is included in every file containing __declspec(dllexport) or add it in each file where the error occurs #ifdef __linux__ #define __declspec(v)