GitLab

If we don't do this we'll continually add flags on recursion.  This
is mainly for users to set in their environment before invoking make.

Avoid conflicts with dash-W on case-insensitive filesystems.

 w32/compat/posixfcn.c: Fix the forgotten OUTPUT_SYNC conditional.
 job.h: Ditto, but in a comment.

Don't dup stdout into stderr in the test suite.
Don't rely on $port_type eq "UNIX" to mean case-preserving.
Check against the real output of ar when creating archives.

 output.c [WINDOWS32]: Include windows.h and sub_proc.h, to avoid
 compiler warnings for CLOSE_ON_EXEC.

We are restarting with the original command line flags, so if we set
MAKEFLAGS as well that will cause double flags.

In this mode we still collect all the output from a given target and
dump it at once.  However we don't treat recursive lines any differently
from non-recursive lines.  Also we don't print enter/leave messages
after every dump.  However we do ensure that we always print them once
to stdout, so the parent make will collect it properly.

Create a new file, output.c, and collect functions that generate output there.
We introduce a new global context specifying where output should go (to stdout
or to a sync file), and the lowest level output generator chooses where to
write output based on that context.

This allows us to set the context globally, and all operations that write
output (including functions like $(info ...) etc.) will use it.

Removed the "--trace=dir" capability.  It was too confusing.  If you have
directory tracking enabled then output sync will print the enter/leave message
for each synchronized block.  If you don't want that, disable directory
tracking.

We tried to get some efficiency by avoiding a parse_file_seq() for simple
pattern prerequisites, but this also means no wildcard expansion was
happening, so add it back.  Add regression tests for wildcards in target and
prerequisite lists.