On 11.02.10 16:09:34, Hendrik Sattler wrote: > Zitat von Michael Wild <them...@gmail.com>: > >> >> On 11. Feb, 2010, at 15:40 , Hendrik Sattler wrote: >> >>> Zitat von Bill Hoffman <bill.hoff...@kitware.com>: >>>> That said, you could have CMake configure a .h file that had this stuff >>>> in it. It might be nice if the function did that automatically, as it >>>> is almost the same code for every project. Then once your project was >>>> built with CMake, you would install the configured .h files and other >>>> build systems could still use the software. >>> >>> OTOH, cmake is a build system, not a code generator. >>> This export stuff is so simple[1], why all the hassle to generate it? >>> >>> HS >>> >>> [1]: you only have too cases: Windows and gcc>=4. All compilers on >>> Windows use the same syntax. >>> >> >> Also refer to http://gcc.gnu.org/wiki/Visibility > > ...which can be even simplified to: > #if defined _WIN32 || defined __CYGWIN__ > #ifdef PROJECT_EXPORT > #define DLL_PUBLIC __declspec(dllexport) > #endif > #else > #if __GNUC__ >= 4 > #define DLL_PUBLIC __attribute__ ((visibility("default"))) > #define DLL_LOCAL __attribute__ ((visibility("hidden"))) > #endif > #endif > #ifndef DLL_PUBLIC > #define DLL_PUBLIC > #endif > #ifndef DLL_LOCAL > #define DLL_LOCAL > #endif > > Note: __declspec(dllimport) is not used here as it is only to be used > when including a header file for a DLL. This needs a different solution > (some custom define) in the header, only.
At least Qt and KDE manage just fine with __declspec(dllimport) in their xxx_export headers defining these macros. That is they define DLL_PUBLIC to be __declspec(dllimport) when PROJECT_EXPORT is not defined and use the fact, that cmake sets a define already when building a shared library. (MAKE_XX_LIBRARY or something similar). Andreas -- Don't you feel more like you do now than you did when you came in? _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake
