Re: Simple program doesn't compile

[Gaius Mulley]

Peter Wiehe <info@pwiehe.de> writes:

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> Hello GNU Modula-2 list!
>
> I have the following program source code:
>
> ------------------
> MODULE Test;
>
> BEGIN
>
> END Test.
> ------------------
>
> It is in test.mod. I type in the shell:
> gm2 -g test.mod
>
> Then I get the following output:
> -----------------------------------
> /usr/bin/ld: /tmp/ccePqjIl.a(wayfarer1_m2.o): in function `init(int, char**)':
> /home/peter/Schreibtisch/dev/Wayfarer 1/wayfarer1_m2.cpp:69: undefined 
> reference to `_M2_Wayfarer1_init'
> /usr/bin/ld: /tmp/ccePqjIl.a(wayfarer1_m2.o): in function `finish()':
> /home/peter/Schreibtisch/dev/Wayfarer 1/wayfarer1_m2.cpp:80: undefined 
> reference to `_M2_Wayfarer1_finish'
> /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/m2/m2pim/libm2pim.so: undefined 
> reference to `RTco_select'
> /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/m2/m2pim/libm2pim.so: undefined 
> reference to `RTco_initSemaphore'
> /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/m2/m2pim/libm2pim.so: undefined 
> reference to `RTco_wait'
> /usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/10/m2/m2pim/libm2pim.so: undefined 
> reference to `RTco_signal'
> collect2: error: ld returned 1 exit status
> -------------------------------
> I use gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0
> and gm2 (Ubuntu 10.2.0-5ubuntu1~20.04) 10.2.0
>
> What can I do to get the program compiled?
>

Hi Peter,

many thanks for the bug report!  Yes this looks like a bug - you might
be able to work around this by forcing the linker to include RTco using:

gm2 -fruntime-modules=Storage,SYSTEM,M2RTS,RTExceptions,IOLink,RTco Test.mod

However on:

$ gm2 --version
gm2 (GCC) 10.2.1 20200915

this appears to work:

$ cat minimal.mod
MODULE minimal ;

BEGIN

END minimal.

$ gm2 minimal.mod
./a.out
$

it might be worth upgrading to 10.2.1 if possible?


regards,
Gaius