Ununtu 21.04 compilation issue

[Andrey Stepnov]

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]

Thanks Andrey!!! That will help.

Paul

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CEO/Seismologist
ISTI==Instrumental Software Technologies, Inc.
Phone +1.518.602.0001  

[Kevin Frechette]

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]

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]

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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Responsable technique
+33 1 83 95 74 37
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75238 Paris cédex 5

[Jean-Marie SAUREL]

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]

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

To view this discussion on the web visit https://groups.google.com/d/msgid/earthworm_forum/a2ad1fbc-be87-a1f2-fbd3-7e56cd6b1dd4%40ipgp.fr.