topic Re: The external identifier name exceeds 31 characters. in Operating System - OpenVMS

The external identifier name exceeds 31 characters.

Vengence123 — Fri, 17 Dec 2010 07:10:01 GMT

Hi All,

I am trying to compile a code in which I am getting the following compilation error.

%CC-W-LONGEXTERN, The external identifier name exceeds 31 characters

Actually the identifier is defined as:

extern PHPAPI zend_class_entry *spl_ce_RecursiveIteratorIterator;

I don't want to use a macro.
Is there any way out of it??

Re: The external identifier name exceeds 31 characters.

Joseph Huber_1 — Fri, 17 Dec 2010 08:00:40 GMT

How is PHPAPI defined ?

Re: The external identifier name exceeds 31 characters.

Steven Schweda — Fri, 17 Dec 2010 08:03:46 GMT

> I don't want to use a macro.

Any reason?

> Is there any way out of it??

As usual, many things are possible.

HELP CC /WARNINGS

Look for "DISABLE". Also (as suggested
there):

HELP CC Language_topics Preprocessor #pragma

Look for "message" and "disable".

HELP CC /NAMES

Look for "SHORTENED".

Re: The external identifier name exceeds 31 characters.

Steven Schweda — Fri, 17 Dec 2010 08:08:40 GMT

And of course, a better problem report would
include output from:

CC /VERSION

And a short test case which anyone could run
is always a nice touch.

Re: The external identifier name exceeds 31 characters.

Vengence123 — Fri, 17 Dec 2010 08:47:13 GMT

I have have found a solution to this question as seen in the comments below.

Re: The external identifier name exceeds 31 characters.

Joseph Huber_1 — Fri, 17 Dec 2010 09:15:38 GMT

In fact Your question can have 2 meanings:
First, how to avoid the warnings: Steven showed the possibilities using compiler options or pragmas.

Second, how to avoid the underlying problem:
The limit of 31 characters is imposed by the VMS object file/library module format, and is fixed. (Don't know if this limit is still on IA64 with its different object format).
So in a project involving different source areas and libraries in my opinion one should avoid long names, unless all component/library compilation can be forced to use the same /NAMES options.

Re: The external identifier name exceeds 31 characters.

Steven Schweda — Fri, 17 Dec 2010 15:05:05 GMT

> I have have found a solution [...]

Future readers might wish to know what that
solution was.

> [...] as seen in the comments below.

Below what?

Re: The external identifier name exceeds 31 characters.

H.Becker — Sat, 18 Dec 2010 22:40:08 GMT

>>> The limit of 31 characters is imposed by the VMS object file/library module format, and is fixed. (Don't know if this limit is still on IA64 with its different object format).

On Integrity the limit is 1024, imposed by the implementation of Librarian. But I don't know whether any compiler makes use of it.

Re: The external identifier name exceeds 31 characters.

WW304289 — Mon, 20 Dec 2010 01:00:34 GMT

You can compile with /names=(as_is, shortened) but callers must also be compiled this way, otherwise you'll get Linker's undef.

Thanks,
-Boris

Re: The external identifier name exceeds 31 characters.

John Reagan — Thu, 30 Dec 2010 04:22:44 GMT

The limit on Alpha is 64 if I recall correctly. The limit on I64 is larger as Hartmut mentioned.

The Pascal compiler uses longer names in the form "module-name.symbol-name" for static symbols in environment files.