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From: Meskovic Zlatko <zlatko.meskovic@ubs.com>
Subject: gnat3.07 on AIX4.1.4: link problems
Date: 1996/12/12
Message-ID: <32B00C9A.41C6@ubs.com>#1/1
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organization: Union Bank of Switzerland
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newsgroups: comp.lang.ada
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Date: 1996-12-12T00:00:00+00:00
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Hi all,

I have a little problem with linking ada on my PowerPC.

I ported (or should i say, i rewrote some packages) gnat3.07 to
PowerPC running AIX4.1.4 so that it uses pthreads for tasking.

Tasking is now running very well, i didn't discover any error until now.
But for building a program i have to run following script:

  gcc -c x.adb
  gnatbind x.ali
  gnatlink -gnatlink /bin/ld -o x x.ali \
    -L/usr/local/lib/gcc-lib/powerpc-ibm-aix4.1.4.0/2.7.2.1/ \
    -L/usr/lib/threads \
    -lgcc -lgnat /lib/crt0_r.o -lc_r -lc
                      ~~~~~~~~   ~~~

This i a little bit complicated and i would prefer to use gnatmake.

But when i use the normal 'gnatmake x.adb'
the program aborts with an exception
  raised STORAGE_ERROR
because gnatlink used only '/lib/crt0.o -lc' for linking.

When i run 'gnatmake x.adb -largs /lib/crt0_r.o -lc_r'
then i get the link warning
  ld: 0711-224 WARNING: Duplicate symbol: __start
  ld: 0711-224 WARNING: Duplicate symbol: .__start
  ld: 0711-345 Use the -bloadmap or -bnoquiet option to obtain more information.

the -bnoquiet option says:
        The following duplicates were found:
 Symbol                    Source-File(Object) OR Import-File{Shared-object}
 ------------------------- -------------------------------------------------
 __start                   crt0main.s(/lib/crt0.o)
    ** Duplicate **        crt0main.s(/lib/crt0_r.o)
ld: 0711-224 WARNING: Duplicate symbol: .__start
 .__start                  crt0main.s(/lib/crt0.o)
    ** Duplicate **        crt0main.s(/lib/crt0_r.o)

############

It looks like gnatlink allways takes /lib/crt0.o first.

Now to my question:

  How can i force gnatlink _not_ to use /lib/crt0.o but 
  to use /lib/crt0_r.o -lc_r instead ???


thanks i advance for any help

  zlatko


--
Zlatko B. Meskovic
Union Bank of Switzerland
Bahnhofstrasse 41
CH-8021 Zuerich

Email: zlatko.meskovic@ubs.com
Phone: +41 - 236 82 50
FAX:   +41 - 236 94 40