Describe the Problem

@robdarvell reports via Slack that MET-11.0.0-beta2 fails to compile due to a linker error.

../../../../src/basic/vx_log/libvx_log.a(main.o): In function `set_handlers()':
main.cc:(.text+0x243): undefined reference to `oom()'
collect2: ld returned 1 exit status
make[4]: *** [ensemble_stat] Error 1
make[4]: Leaving directory

This was added in beta2 but introduced a new dependency. The vx_log library now depends on the vx_util library. But I'm sure that vx_util already depends on vx_log. To avoid a circular dependency, recommend main.cc from vx_log into the vx_util library. Listed below is a

The first step here is trying to replicate this linker error. Check for ld options to enforce strict dependency checking. It would be nice for this to be flagged during development rather than leaving it to users to find.

Once we can replicate the error, confirm that moving main.cc into vx_util actually fixes it. Of course, this may impact the linking for other applications.

Here's a more detailed description of the problem:
The oom() (i.e. out-of-memory) handler is defined in vx_util/memory.cc. But it is called by vx_log/main.cc. That means that vx_log has a dependency on vx_util. And that means that we need "-lvx_log" to be followed by "-lvx_util" somewhere in the link in src/tools/core/ensemble_stat/Makefile.am. But this is NOT the case. "-lvx_log" is basically last and "-lvx_util" does not appear after it.

Only need to fix this for MET-11.0.0-beta3. We do not provide bugfixes for beta releases.

Expected Behavior

MET-11.0.0-beta3 should compile/link even when strict library dependencies are enforced.

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