- 'busy' has to be handled in a more atomic fashion to avoid crazy
  runtime race conditions
- the basic simulator is too fast sometimes; rewrite the accesses to
  the T cache to avoid there again crazy behaviors

Hopefully that's better...

This commit removes the warning:
make[4]: warning: jobserver unavailable: using -j1.  Add '+' to parent make rule.

Basically, inside a Makefile we should use $(MAKE) instead of make.

Since VCD has now to go through the T tracer, we enforce the consistency
of data found in common/utils/LOG/vcd_signal_dumper.[ch] with data
found in common/utils/T/T_messages.txt.

We might get completely rid of common/utils/LOG/vcd_signal_dumper.[ch] at some
point. For the moment, let's keep it.

This commit adds the program common/utils/T/check_vcd.c and necessary
modifications to enforce its use at compilation time.

If you modify common/utils/LOG/vcd_signal_dumper.[ch] but do not update
common/utils/T/T_messages.txt an error will pop up when you compile the
software. You have to keep both modules synchronized.

Use "error:" as prefix to error messages in genids.c
to help looking for errors in case of failure of
the build.

Don't use shm anymore. Use mmap directly.

Check result of send_is_on and close connection to tracee on error.

Make it compatible with 'template' gtwave files as found in openair's
repository.

The type VCD_NAME was added to the VCD IDs in T_messages.txt.
The database processing code was adapted to use it.
The tracer to_vcd was adapted to use it and render the produced vcd
output compatible with the 'template' gtkwave files.

When running to_vcd, do not forget to pass -vcd to use this feature.

This tracer allows the connection of several tracers to one tracee.

To use the multi tracer:
- run the tracee as usual, eg. ./lte-softmodem -O xxxx.conf --T_stdout 0
- run the multi tracer: ./multi -d ../T_messages.txt
- connect other tracers to the multi tracer:
   - ./enb -d ../T_messages.txt -p 2022
   - ./textlog -d ../T_messages.txt -p 2022
   - etc.

By default the multi tracer connects to the tracee to the port 2021,
as for any other tracer.

Then it accepts connections from other tracers on the port 2022.

This can be changed with parameters on the command line.

The tracee and the other tracers can be stopped/started at any time.

- bug fixed in ue and enb tracer: the socket needs to be closed
  in case of restart
- cleanup: fix spacing in T_messages.txt

Summary of changes:
- bug fixes in various places

A better solution has to be found.

Pass the command line arguemnt -vcd to trace all VCD variables
and functions.

 -- balanced (current version): all UE shares the same BW
 -- single-ue : one UE will use the whole requested BW
 -- unbalanced : all but one UE will use a residual 2% of the requested BW
                 the rest of requested BW will be used by one UE
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

One of the optimized RE allocation function does not work properly
and generates some decoding errors with a COTS UE. Let's use the
generic function for the moment, while analyzing what is wrong.

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Merge remote-tracking branch 'origin/338-correcting-changes-made-in-dlsch_demodulation-c-in-8cbe7cf6' into develop_integration_2018_w31

Conflicts:
	openair1/PHY/LTE_UE_TRANSPORT/dlsch_demodulation.c

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Merge remote-tracking branch 'origin/337-fix-t_ids-h-issue-for-phy_mex' into develop_integration_2018_w31

Conflicts:
	cmake_targets/CMakeLists.txt

Merge remote-tracking branch 'origin/issue332-dft-initializations' into develop_integration_2018_w31

Merge remote-tracking branch 'origin/334-iq-replay-without-mmap-usage' into develop_integration_2018_w31

 * adding merge request allow flag:
  -- if false no forced merge to develop
  -- if true and if branch is not develop, then forced merge to develop
 * lowered the ru gains in CI conf files
 * adding on-the-fly HTML summary within python main.py script
 * adding 20 MHz testcases to FDD band 7 scenario
 * adding GitLab status for
  -- centOS build
  -- FDD-band7 tests
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

 -- if false no forced merge to develop
 -- if true and if branch is not develop, then forced merge to develop
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

  -- Adding script to notify developer when introducing compilation warnings
  -- Fix on the CentOS log archiving / reporting
Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

- install package 'vim-common' to have 'xxd' needed by the compilation
  process of the T tracer
- change the way xxd is called so that no file is created in case
  of error