[Xsb-development] [ xsb-Bugs-733922 ] gpp hangs on end_of_file in middle of source files.

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Bugs item #733922, was opened at 2003-05-07 10:44
Message generated for change (Comment added) made by kifer
You can respond by visiting: 
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Category: Pre-processor
Group: Other
>Status: Closed
>Resolution: Invalid
Priority: 6
Submitted By: Luis Castro (lfcastro)
Assigned to: Nobody/Anonymous (nobody)
Summary: gpp hangs on end_of_file in middle of source files.

Initial Comment:
On Windows (and apparently only on Windows), when
compiling almost any non-trivial Prolog file which uses
the pre-processor, and which has a line with
'end_of_file.', the compilation process gets stuck in
the pre-processing phase.

That doesn't seem to occur in Linux, at least.

To reproduce, insert a line like

end_of_file.

in line #11 of XSB/lib/storage.P.



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>Comment By: Michael Kifer (kifer)
Date: 2003-05-12 01:57

Message:
Logged In: YES 
user_id=12609

How did u determine that the hanging is due to gpp?

I can't reproduce this.

First, line 11 in storage.P is inside comments, so it is not
helpful.
So I put end_of_file. in line 11 after the end of the
topmost comment.
I then ran gpp separately like this (your paths might be
different):

  h:\XSB\XSB\config\x86-pc-windows\gpp -I h:\XSB\XSB\emu 
storage.P

and it finished preprocessing the file.

Now: when I *compile* the same file in XSB then I see

   [Preprocessing .\storage.P]

and it is hanging. But you are wrong to blame it on gpp.
There is no
message saying "Preprocessing done", so not seeing anything
after 
the above msg dosnt mean that gpp is not done.
If u dont believe, edit parse.P and insert such a "gpp done"
msg and see
for yourself.
(You will see this msg if you uncomment the statement that
defines DEBUG_GPP preprocessor var in parse.P)


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