diff options
| -rw-r--r-- | src/include/fmgr.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/src/include/fmgr.h b/src/include/fmgr.h index 0491e2e1d18..18c224ecfa4 100644 --- a/src/include/fmgr.h +++ b/src/include/fmgr.h @@ -344,11 +344,17 @@ typedef const Pg_finfo_record *(*PGFInfoFunction) (void); /* * Macro to build an info function associated with the given function name. - * Win32 loadable functions usually link with 'dlltool --export-all', but it - * doesn't hurt to add PGDLLIMPORT in case they don't. + * + * As a convenience, also provide an "extern" declaration for the given + * function name, so that writers of C functions need not write that too. + * + * On Windows, the function and info function must be exported. Our normal + * build processes take care of that via .DEF files or --export-all-symbols. + * We add PGDLLEXPORT nonetheless so that C functions built with a + * different build process are guaranteed to be exported. */ #define PG_FUNCTION_INFO_V1(funcname) \ -Datum funcname(PG_FUNCTION_ARGS); \ +extern PGDLLEXPORT Datum funcname(PG_FUNCTION_ARGS); \ extern PGDLLEXPORT const Pg_finfo_record * CppConcat(pg_finfo_,funcname)(void); \ const Pg_finfo_record * \ CppConcat(pg_finfo_,funcname) (void) \ |