diff options
Diffstat (limited to 'src/gui.h')
-rw-r--r-- | src/gui.h | 26 |
1 files changed, 26 insertions, 0 deletions
@@ -541,3 +541,29 @@ typedef enum # define CONVERT_FROM_UTF8(String) (String) # define CONVERT_FROM_UTF8_FREE(String) ((String) = (char_u *)NULL) #endif /* FEAT_GUI_GTK */ + +#ifdef FEAT_GUI_GTK +/* + * The second parameter of g_signal_handlers_disconnect_by_func() is supposed + * to be a function pointer which was passed to g_signal_connect_*() somewhere + * previously, and hence it must be of type GCallback, i.e., void (*)(void). + * + * Meanwhile, g_signal_handlers_disconnect_by_func() is a macro calling + * g_signal_handlers_disconnect_matched(), and the second parameter of the + * former is to be passed to the sixth parameter of the latter the type of + * which, however, is declared as void * in the function signature. + * + * While the ISO C Standard does not require that function pointers be + * interconvertible to void *, widely-used compilers such as gcc and clang + * do such conversion implicitly and automatically on some platforms without + * issuing any warning. + * + * For Solaris Studio, that is not the case. An explicit type cast is needed + * to suppress warnings on that particular conversion. + */ +# if defined(__SUNPRO_C) && defined(USE_GTK3) +# define FUNC2GENERIC(func) (void *)(func) +# else +# define FUNC2GENERIC(func) G_CALLBACK(func) +# endif +#endif /* FEAT_GUI_GTK */ |