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From: peic@core.north.de (Peter Eichler)
Newsgroups: comp.sys.amiga.programmer
Subject: Re: printf arrays in SAS/C
Message-ID: <1925766f.ARN0099@core.north.de>
Date: 15 May 91 19:25:51 GMT
References: <1991May13.182159.19294@nntp-server.caltech.edu>
Reply-To: peic@core.north.de (Peter Eichler)
Followup-To: comp.sys.amiga.programmer
Organization: Private UUCP-Site
Lines: 46

In article <1991May13.182159.19294@nntp-server.caltech.edu>, Robert Andrew Knop writes:

#Hi-
#
#Thank you to everyone who responded to my problem with linking to the amiga
#library and reading files.  I seem to have that one fixed, although I am
#having trouble checking that.  Now, I seem to have a different problem,
#and that is referencing arrays in printf.  Consider the following test
#program:
#
##include <stdio.h>
#
#main()
#{  int i;
#   float junk[5];
#   
#   for (i=0;i<5;i++) junk[i]=(float)i+0.5;
#   for (i=0;i<5;i++) printf("junk[i]=%f\n",junk[i]);
#}
#
#Compiled under UNIX, this program works exactly as I would expect it to.
#When I try to compile it on my Amiga with SAS/C 5.10, I get four very weird
#linker errors.  The linker tells me that I am trying to references undefined
#symbols.  These symbols are something like "_CVX45".  Am I forgetting
#to include some header file or some such?  What is going on here?  This has
#me quite befuddled.
#
#Thanks,
#
#-Rob Knop

No, in a way, everything is correct. SAC-C uses TWO kinds of printf().
The first is placed in the LC.lib (hope the name is correct) which offers
everything but floating point. In this way they avoid linking fp-calls
to programs which don't need floating point: It is shorter and faster.

The other other one is placed in LCM.lib (usually) and it enables you
to use floating-point.

Try to compile it with the -Lm option, like
lc -d0 -v -Lm foo

These "_CVX45" stuff are internal fp-routines...

Hope, that helps,
Peter