Powel Compiler for unix problems

Thread View: comp.lang.modula2

2 messages

[T] Back to Threads [V] Tree View [G] Group Articles

2 total messages Started by johnh Sat, 28 Feb 1987 23:12

#3627

Author: johnh
Date: Sat, 28 Feb 1987 23:12

27 lines
1883 bytes

We have discovered a problem (we think) with the Powell compiler from
Dec under unix.  (We have discovered and fixed several others).

The problem is if you have a definition module x which exports procedure
z and in implementation module x you have a 'inline' module y which exports
procedure z the symbol which is created for procedure z is x_y_z.  If you
have another module which imports procedure z from module x the linker
complains that symbol x_z is undefined.  This is even if the keyword
@unqualified is put before procedure z inside module y.  

A work around is to declare procedure z in the main module x and have that
call y.z with z being exported qualified.

Is there a better workaround?  

We have fixed several problems associated with returns in 'fuction' procedures.
We also have an idea on how to get the system to complain about def files which
have been modified since an object module was compiled at link time.

Any suggestions, comments or additional bugs fixed or not would be appreciated.
johnh...

-- 
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
UUCP: ihnp4!wheaton!johnh                    telephone: (312) 260-3871 (office)
Mail: John Hayward Math/Computer Science Dept. Wheaton College Wheaton Il 60187
       Act justly, love mercy and walk humbly with your God. Micah 6:8b

Re: Powel Compiler for unix problems

#3628

Author: ken
Date: Sun, 01 Mar 1987 06:35

11 lines
1040 bytes

Yes, the Powell compiler doesn't handle nested modules correctly.

You can also get into trouble with mutually recursive references in
imported modules even when there is no real circularity. This is due to
the way the definitions are handled (by textual inclusion).

Would someone official from DECWRL care to say whether it is legal to
post patches for bugs? I'm sure we could all get a better compiler by
sharing our fixes.

	Ken

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads