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Provide DLLEXPORT markers for C functions via PG_FUNCTION_INFO_V1 macro.

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Second try at the change originally made in commit 8518583cd;
this time with contrib updates so that manual extern declarations
are also marked with PGDLLEXPORT.  The release notes should point
this out as a significant source-code change for extension authors,
since they'll have to make similar additions to avoid trouble on Windows.

Laurenz Albe, doc change by me

Patch: <A737B7A37273E048B164557ADEF4A58B53962ED8@ntex2010a.host.magwien.gv.at>
This commit is contained in:
Tom Lane
2016-11-04 19:04:56 -04:00
parent 20540710e8
commit c8ead2a397
4 changed files with 41 additions and 25 deletions
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7
src/include/fmgr.h
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@ -350,12 +350,11 @@ typedef const Pg_finfo_record *(*PGFInfoFunction) (void);
*
* 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.
* Module authors using a different build process might need to manually
* declare the function PGDLLEXPORT. We do that automatically here for the
* info function, since authors shouldn't need to be explicitly aware of it.
* Module authors using a different build process might do it differently,
* so we declare these functions PGDLLEXPORT for their convenience.
*/
#define PG_FUNCTION_INFO_V1(funcname) \
extern 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) \