Ununtu 21.04 compilation issue

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Andrey Stepnov

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Sep 3, 2021, 5:02:00 AMSep 3
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Hi Community!

The issue arises during compilation on latest ubuntu server.

It looks like this on `system_control` source:

```
Making unix_modules in: /opt/ew/earthworm_7.10/src/system_control
make[1]: Entering directory '/opt/ew/earthworm_7.10/src/system_control'
----------
Making unix_modules in: /opt/ew/earthworm_7.10/src/system_control/pau
make[2]: Entering directory '/opt/ew/earthworm_7.10/src/system_control/pau'
gcc -g -pthread -Wall -Wextra -Wno-sign-compare -Wno-unused-parameter -Wno-unknown-pragmas -Wno-pragmas -Wformat -Wdeclaration-after-statement -D_LINUX -Dlinux -D_INTEL -D_USE_SCHED -D_USE_PTHREADS -D_USE_TERMIOS -D_FILE_OFFSET_BITS=64 -ltirpc -I/opt/ew/earthworm_7.10/include -I/usr/include -D_LINUX -Dlinux -D_INTEL -D_USE_SCHED -D_USE_PTHREADS -D_USE_TERMIOS -D_FILE_OFFSET_BITS=64 -ltirpc -I/opt/ew/earthworm_7.10/include -I/usr/include -c -o pau.o pau.c
gcc -g -pthread -Wall -Wextra -Wno-sign-compare -Wno-unused-parameter -Wno-unknown-pragmas -Wno-pragmas -Wformat -Wdeclaration-after-statement -D_LINUX -Dlinux -D_INTEL -D_USE_SCHED -D_USE_PTHREADS -D_USE_TERMIOS -D_FILE_OFFSET_BITS=64 -ltirpc -I/opt/ew/earthworm_7.10/include -I/usr/include -D_LINUX -Dlinux -D_INTEL -D_USE_SCHED -D_USE_PTHREADS -D_USE_TERMIOS -D_FILE_OFFSET_BITS=64 -ltirpc -I/opt/ew/earthworm_7.10/include -I/usr/include -c -o setflags.o setflags.c
gcc -o /opt/ew/earthworm_7.10/bin/pau -g -pthread -Wall -Wextra -Wno-sign-compare -Wno-unused-parameter -Wno-unknown-pragmas -Wno-pragmas -Wformat -Wdeclaration-after-statement -D_LINUX -Dlinux -D_INTEL -D_USE_SCHED -D_USE_PTHREADS -D_USE_TERMIOS -D_FILE_OFFSET_BITS=64 -ltirpc -I/opt/ew/earthworm_7.10/include -I/usr/include pau.o setflags.o /opt/ew/earthworm_7.10/lib/dirops_ew.o -L/opt/ew/earthworm_7.10/lib -lew_mt -lpthread
/usr/bin/ld: /opt/ew/earthworm_7.10/lib/libew_mt.a(getutil.o):/opt/ew/earthworm_7.10/include/startstop_lib.h:248: multiple definition of `oldNChild'; pau.o:/opt/ew/earthworm_7.10/include/startstop_lib.h:248: first defined here
/usr/bin/ld: /opt/ew/earthworm_7.10/lib/libew_mt.a(getutil.o):/opt/ew/earthworm_7.10/include/startstop_lib.h:249: multiple definition of `newNRing'; pau.o:/opt/ew/earthworm_7.10/include/startstop_lib.h:249: first defined here
/usr/bin/ld: /opt/ew/earthworm_7.10/lib/libew_mt.a(getutil.o):/opt/ew/earthworm_7.10/include/startstop_lib.h:253: multiple definition of `badProcessID'; pau.o:/opt/ew/earthworm_7.10/include/startstop_lib.h:253: first defined here
/usr/bin/ld: /opt/ew/earthworm_7.10/lib/libew_mt.a(getutil.o):/opt/ew/earthworm_7.10/include/startstop_lib.h:255: multiple definition of `lockfile'; pau.o:/opt/ew/earthworm_7.10/include/startstop_lib.h:255: first defined here
/usr/bin/ld: /opt/ew/earthworm_7.10/lib/libew_mt.a(getutil.o):/opt/ew/earthworm_7.10/include/startstop_lib.h:256: multiple definition of `lockfile_fd'; pau.o:/opt/ew/earthworm_7.10/include/startstop_lib.h:256: first defined here
collect2: error: ld returned 1 exit status
make[2]: *** [makefile.unix:23: /opt/ew/earthworm_7.10/bin/pau] Error 1
make[2]: Leaving directory '/opt/ew/earthworm_7.10/src/system_control/pau'
```

And for every next module, the ld error the same.

After a little investigation, I found that the default compiler is too new: `gcc-10` (installed by default). So the fix is to use gcc-8:

```
apt install build-essential gfortran gcc-8 g++-8
```

And fix `ew_linux.bash` env's:

```
...
export CC=gcc-8
export CXX=g++-8
if [ "${CC}" = "gcc-8" ] ; then
...
```

Maybe it will save some time for someone.

Have a nice day!

Andrey Stepnov

Paul Friberg

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Sep 3, 2021, 4:32:31 PMSep 3
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Thanks Andrey!!! That will help.

Paul

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Kevin Frechette

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Sep 4, 2021, 6:15:55 AMSep 4
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Note: When using a fresh checkout of the latest Earthworm (git clone https://gitlab.com/seismic-software/earthworm.git) it compiles fine with the default gcc (version 10.3.0) compiler.

On Fri, Sep 3, 2021 at 5:02 AM Andrey Stepnov <myj...@gmail.com> wrote:

Andrey Stepnov

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Sep 6, 2021, 8:17:55 AMSep 6
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Hi Kevin!

I have the same error with earthworm-working and gcc 10.0.3.

I also report that trig2disk was not compiled with either gcc-8 or gcc-10 (for both working and 7.10.1).

Andrey
> To view this discussion on the web visit https://groups.google.com/d/msgid/earthworm_forum/CAKjjztqqqvkE-o%3DLYJ%2BpjhD3dk%2BcfezTN%3DZHpoWpSoWxOMixEw%40mail.gmail.com.

Jean-Marie SAUREL

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Sep 21, 2021, 6:55:21 AMSep 21
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Hello,

Same error for me today with a fresh Debian 11 install (gcc 10.2.1-6)
and two EarthWorm versions :
- v7.10-1 from http://folkworm.ceri.memphis.edu/ew-dist/;
- today's git clone.

Regards.

Jean-Marie.
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Jean-Marie SAUREL

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Sep 21, 2021, 10:23:27 AMSep 21
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Hello,

Some more news : these seems related to gcc-10 compiler only.

I had the same error with the v7.10 old sources.
Choosing the older gcc-9 on Debian 11 solved the issue and the
compilation ended successfully.

The following modules were impacted the same way at link stage when
using gcc-10 :
- stropmodule;
- status;
- startstop;
- restart;
- reconfigure;
- pau.

Regards.

Jean-Marie.

Paul Friberg

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Sep 21, 2021, 1:59:52 PMSep 21
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Thanks Jean-Marie,

Yes, we haven't played much with Debian or the new gcc v10 edition yet. We will make sure to test that and get it all going for EW v7.11 release.

Cheers,

Paul

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