Thanks to the previous commit of @mikael-s.

Mikaël Salson authored Jan 31, 2018 and Mathieu Giraud committed Feb 01, 2018

Useful so that make doesn't tell it has failed while it was just the file that
already existed

Mikaël Salson authored Jan 31, 2018 and Mathieu Giraud committed Feb 01, 2018

See !147

See #3003.

See #3003.

'make demo' should be run before this

See #2635.

Follows #3003.
Re-closes #3032.

We add '-X 1000' to command lines on LIL-L4.
See #3027.

Closes #3032.

out/ directory may not exist, leading to errors.
In that case we can do without temporary files.

When calling exit() the memory allocated by the system is not
properly free-ed. This is not really a problem in itself but
Valgrind will complain about that.

There are two solutions:
1. replace exit() with return, but this
   requires to be in the main() function
2. prevent Valgrind from being used in
   other cases (exit because of an error)

See #3031

Some allocations were not properly free-ed.
Spotted by Valgrind.

See #3031

See #3031

See #2247.

Closes #3003.

See #3003.

See #3003.

Closes #2635.

See #2635.

See #2635.

See #2635, but also #3027.

See #2635.

Closes #3012 and opens #3026.

The {} initializer was buggy on some g++-4.8 versions.

Closes #3023