The external identifier name exceeds 31 characters.

[Vengence123]

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??

[Joseph Huber_1]

How is PHPAPI defined ?

[Steven Schweda]

> 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".

[Steven Schweda]

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.

[Vengence123]

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

[Joseph Huber_1]

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.

[Steven Schweda]

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

Future readers might wish to know what that
solution was.

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

Below what?

[H.Becker]

>>> 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.

[WW304289]

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

[John Reagan]

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.