Remove all the rest of the FT code

[jsquyres]

There's still a bunch of FT things left over in the code base that should be removed:

• opal/tools/opal-checkpoint
• opal/tools/opal-restart
• Various AM_CONDITIONALs, such as WANT_FT, WANT_FT_CR, WANT_FT_THREAD
• config/opal_setup_ft.m4
• OPAL_ENABLE_FT_* preprocessor macros
• ...possibly more? I stopped looking

[bosilca]

Not all of them are related to C/R. ULFM uses quite a few, so the removal should be done carefully.

[jsquyres]

Gotcha.

Of the list above, can you identify what ULFM is using?

[bosilca]

@abouteiller.

[abouteiller]

Can be removed without side effects on ULFM:

1. opal/tools/*: we do not use at all.
2. WANT_FT_CR: we do not use, can remove all blocks of code between ifdef ENABLE_FT_CR
3. WANT_FT_THREAD/ENABLE_FT_THREAD: this pertains only to opal/runtime/opal_cr.[ch]. We do not use.

What we need to KEEP:

1. config/opal_setup_ft.m4: NEEDED. We reuse most of the logic to add the FT_MPI case alongside the FT_CR case. We do not use any of the logic for WANT_FT_THREAD.
2. some schizo specific behavior about --enable-recovery, and the mpirun/orte logic to handle persistent DVM/PRRTE).

[jsquyres]

Cross-reference this against #7740.

[jjhursey]

Things to remove

• [x] opal-checkpoint tool
• [x] opal-restart tool
• [x] WANT_FT_CR code blocks
• [x] WANT_FT_THREAD/ENABLE_FT_THREAD code blocks
• [x] OPAL_ENABLE_FT_CR code blocks
• [x] pml/crcpw component
• [x] ompi/mca/crcp framework
• [x] opal/mca/crs framework (@abouteiller do you all use anything here?)
• [x] Remove OPAL_ENABLE_CRDEBUG blocks
• [x] opal_cr_, OPAL_CR_, and OPAL_CHECKPOINT_ variables
• [x] INC mechanism
• [x] NULL'ify the ft_event in any component providing them
• [x] OMPI_CRCP_ macros

[jjhursey]

PR #8311 should resolve this issue.

[jjhursey]

PR #8312 has been merged. This can be closed