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lots of errors from fmgr.h when I try to write a C UDF

From

Anh Pham

Date:

01 February 2014, 05:31:19

Hi,

I had Postgres 9.3 setup and run successfully in Eclipse (MacOSX)

I am trying to write a C user-defined function:

#include <fmgr.h>
...
#ifdef PG_MODULE_MAGIC
PG_MODULE_MAGIC;
#endif
...

However, when I tried to compile the code:

gcc -fpic -c ...

It gave me a lot of errors and warnings from fmgr.h:

...
/Users/atpham/workspacecdt/pgsql/src/include/fmgr.h:59:2: error: unknown type name 'MemoryContext'
        MemoryContext fn_mcxt;          /* memory context to store fn_extra in */
        ^
/Users/atpham/workspacecdt/pgsql/src/include/fmgr.h:71:2: error: unknown type name 'Oid'
        Oid                     fncollation;    /* collation for function to use */
        ^
/Users/atpham/workspacecdt/pgsql/src/include/fmgr.h:72:2: error: unknown type name 'bool'
        bool            isnull;                 /* function must set true if result is NULL */
...

Any suggestion where I did it wrong?

Thank you :)

Re: lots of errors from fmgr.h when I try to write a C UDF

From

Tom Lane

Date:

01 February 2014, 08:49:43

Anh Pham <atpham.wpi@gmail.com> writes:
> I am trying to write a C user-defined function:

> *#include <fmgr.h>*
> *...*
> *#ifdef PG_MODULE_MAGIC*
> *PG_MODULE_MAGIC;*
> *#endif*
> ...

> However, when I tried to compile the code:
> *gcc -fpic -c* ...
> It gave me a lot of errors and warnings from fmgr.h:

Most Postgres backend header files assume that you've included
postgres.h first ... did you do that?

            regards, tom lane