Queue failed fork() (etc.) to be handled like any other failed job.

If we failed to fork() we were essentially exiting make immediately
without respect to ignore flags, etc.  On one hand that makes sense
because if you can't fork you're in real trouble, but it doesn't
work so well on systems where we don't fork at all.  Instead, treat
a fork error like any other error by delaying the handling until
the next call to reap_children().  Any child with a PID of -1 is
considered to have died before starting so check these first without
waiting for them.

* src/commands.c (fatal_error_signal): Don't kill children that
never started.
* src/function.c (func_shell_base): Handle cleanup properly if the
child doesn't start.
* src/job.c (reap_children): Check for children that died before
starting and handle them without waiting for the PID.
(start_job_command): Free memory when the child doesn't start.
(start_waiting_job): Don't manage children who never started.
(child_execute_job): If the fork fails return PID -1.
* src/vmsjobs.c: Check for children that never started.
* tests/run_make_tests.pl: Parse config.status to get all options.

1 files changed, 10 insertions, 3 deletions

diff --git a/tests/run_make_tests.pl b/tests/run_make_tests.pl
index 2e063072..500524e3 100644
--- a/tests/run_make_tests.pl
+++ b/tests/run_make_tests.pl
@@ -71,9 +71,16 @@ use FindBin;
 use lib "$FindBin::Bin";
 
 require "test_driver.pl";
-if (! eval { require "config-flags.pm" }) {
-    # Some target systems don't create config-flags.pm
-    %CONFIG_FLAGS = ();
+
+%CONFIG_FLAGS = ();
+
+my $statnm = "$FindBin::Bin/../config.status";
+if (open(my $fh, '<', $statnm)) {
+    while (my $line = <$fh>) {
+        $line =~ m/^[SD]\["([^\"]+)"\]=" *(.*)"/ and $CONFIG_FLAGS{$1} = $2;
+    }
+} else {
+    warn "Failed to open $statnm: $!";
 }
 
 # Some target systems might not have the POSIX module...