[Asterisk-code-review] loader: Improve error handling. (asterisk[master])

[Corey Farrell]

Hello Richard Mudgett, Jenkins2, 

I'd like you to reexamine a change. Please visit

    https://gerrit.asterisk.org/10315

to look at the new patch set (#6).

Change subject: loader: Improve error handling.
......................................................................

loader: Improve error handling.

* Display list of unavailable dependencies when they cause another
  module to fail loading.
* When a module declines to load find all modules which depend on it so
  they can be declined and listed together.
* Prevent retry of declined modules during startup.
* When a module fails to dlopen try loading it with RTLD_LAZY so we can
  attempt to display the list of missing dependencies.

These changes are meant to reduce logger spam that were caused when a
module has many dependencies and declines to load.  This also fixes some
error paths which failed to recognize required modules.

Module load/start errors are delayed until the end of loader startup.

Change-Id: I046052c71331c556c09d39f47a3b92975f3e1758
---
M include/asterisk/logger.h
M main/loader.c
M main/logger.c
3 files changed, 257 insertions(+), 32 deletions(-)


  git pull ssh://gerrit.asterisk.org:29418/asterisk refs/changes/15/10315/6
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Gerrit-Project: asterisk
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I046052c71331c556c09d39f47a3b92975f3e1758
Gerrit-Change-Number: 10315
Gerrit-PatchSet: 6
Gerrit-Owner: Corey Farrell <git at cfware.com>
Gerrit-Reviewer: Corey Farrell <git at cfware.com>
Gerrit-Reviewer: Jenkins2 (1000185)
Gerrit-Reviewer: Richard Mudgett <rmudgett at digium.com>
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