GCC 1.37.1 on a DECsystem 3100

[Eugene &]

In article <41714 at cornell.UUCP> alg at cornell.UUCP (Anne Louise Gockel) writes:


   The procedures suggest that you build gcc once with the Ultrix cc compiler, a
   second time with the gcc compiler and a third time with the new gcc in order
   to compare the binaries.  When I compared the binaries in the manner specified
   in Step 10) of the INSTALL document, I found that many of the files had
   differences beyond just the date stamp.  The differences were extremely
   regular, almost as if there was a datestamp in the middle of the file.

   Has anyone run into this problem?  Have I made a mistake in the installation
   procedure?  Is there a good explanation for these differences?

					   Thank you,
					   Anne Louise Gockel
					   Cornell Computer Science
   Internet: alg at cs.cornell.edu
   ----------
   Partial list of differences from the "cmp -l" command, comparing the stage2 and
   the stage3 .o files: 
   ----------
   c-convert.o
     4838  70  67
     4839  61  64
     4840  64  65
     4841  60  67
   c-decl.o
    52282  70  67
    52283  61  64

  etc...

I had the same problem with gcc 1.36, but I looked a bit further and
found that the so called differences are:

	diff ../testdiff/c-convert.o.hexl ./c-convert.o.hexl
	1c1
	< 00000000: 6201 0300 0eec 5826 3412 0000 6000 0000  b.....X&4...`...
	---
	> 00000000: 6201 0300 9df8 5726 3412 0000 6000 0000  b.....W&4...`...
	405c405
	< 00001940: 722f 746d 702f 6363 6130 3635 3130 2e73  r/tmp/cca06510.s
	---
	> 00001940: 722f 746d 702f 6363 6130 3334 3339 2e73  r/tmp/cca03439.s


According to me this is harmless, because they don't differ a lot !

The above output of a special diff shows that the first lines differ
and that half way the file is another difference. I have tested it,
and it appears to be in every *.o file. It is, I think, the name of
the intermediate assembler file where the *.o file is generated from
(but this is a guess !). Further I did not experience many problems in
using gcc (1.36) on the DEC Stations, but I did not use it extensively.

Eugene


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Name:     Eugene Bogaart | Software Engineering Research Centre 
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