Fwd: A beginner's question

[Michael Riedl]

Hallo Rudolf,

perhaps a good idea to share some code you made some modifications on 
"to work around errors I suspect might be caused by GM2".

I remember I had some (small) issues at the beginning porting code from 
XDS Modula-2 to GM2 in a similar situation. So I hope I can help out at 
least
in some cases. For example GM2 is more strict with type compatibility - 
I detected some issues I was never aware about at that time...
But now I can compile with both compilers (and AWD M2) with close to 
zero modifications. Do not know GPM but "we will get that fixed" :-)

Gruß

Michael

Am 07.04.23 um 11:52 schrieb Rudolf Schubert:
>           Hi,
>
>           I'm about porting an old Programm developped with Gardens Point 
> Modula-2
>           (GPM) and facing a few problems. But before I possibly ask silly
>           questions I'd like to know how I can make sure to use the latest
>           version of GM2.
>
>           I'm working on a (current) Arch Linux with this gcc version:
>           gcc (GCC) 12.2.1 20230201
>
>           I started with the instructions found here:
>           https://www.nongnu.org/gm2/12/development.html
>
>           The idea was to have a local installation directory, so my
>           configure command was this:
>
>           ../gcc-git-devel-modula2/configure --prefix=<some_local_inst_dir> 
> --enable-languages=default,m2 --enable-libgm2
>
>           But during 'make install' I got this error:
>
>           /usr/bin/ld: build/genmodes.o: relocation R_X86_64_32S against 
> `.rodata' can not be used when making a PIE object; recompile with -fPIE
>
>           So finally I changed my configure command:
>
>           ../gcc-git-devel-modula2/configure --prefix=<some_local_inst_dir> 
> --with-system-zlib --enable-default-pie --enable-default-ssp 
> --enable-languages=default,m2 --enable-libgm2
>
>           and could easily compile the famous hello.mod:
>
>           <some_local_inst_dir>/bin/gm2 -g hello.mod
>
>           ldd showed this:
>
> rudolf@archkiste: /mo1/more_homedata/lern/gpm_gm2 $ ldd a.out
>           linux-vdso.so.1 (0x00007ffe00770000)
>           libstdc++.so.6 => /usr/lib/libstdc++.so.6 (0x00007fcb2ca00000)
>           libm.so.6 => /usr/lib/libm.so.6 (0x00007fcb2c918000)
>           libgcc_s.so.1 => /usr/lib/libgcc_s.so.1 (0x00007fcb2cc9f000)
>           libc.so.6 => /usr/lib/libc.so.6 (0x00007fcb2c731000)
>           /lib64/ld-linux-x86-64.so.2 => /usr/lib64/ld-linux-x86-64.so.2 
> (0x00007fcb2cd0e000)
>
> rudolf@archkiste: /mo1/more_homedata/lern/gpm_gm2 $ ./a.out
> hello world
>
>           This was the easy part. Then I tried compiling my 'big' programm
>           which I wanted to port but did  not succeed. I played around a bit
>           but with no success. Again I saw 'PIE' in some messages and I
>           guessed if the problem might be that my Arch system does not use
>           PIE but GM2 was now compiled with PIE and that this will go wrong.
>
>           So I installed a Debian sid with gm2 in a virtual machine (BTW,
>           gm2 --version says this: gm2 (Debian 12.2.0-14) 12.2.0) and with
>           this installation I am now finally able to compile and run a
>           modified version of my 'big' programm.
>
>           The modifications I made were to work around errors I suspect
>           might be caused by GM2. When using GPM, however I do not need
>           to use these workarounds! But I'm not sure if GM2 in Debian sid
>           really is the latest version. So I first want to make sure I'm
>           using the latest version. And thus my question simply is:
>
>           How will I do this?
> BR
>
> Rudolf
>
>
> --
> Rudolf Schubert                 \
> Kirchstr. 18a                    \  mailto:rudolf@muc.de
> 82054 Sauerlach                   > http://www.dose.muc.de
> Deutschland                      /
> Tel. 08104/908311               /