fix distmeta etc with BSD make -j

Author: mohawk2

.github/workflows/smoke-freebsd.yml

@@ -35,7 +35,7 @@ jobs:
             sysctl hw.physmem
             sysctl hw.usermem
             CPU=$(sysctl -n hw.ncpu)
-            export HARNESS_OPTIONS=j$CPU
+            export HARNESS_OPTIONS=j$CPU MAKEFLAGS=-j$CPU
             perl -V
             perl Makefile.PL
             make test

lib/ExtUtils/MM_Any.pm

@@ -225,7 +225,7 @@ sub is_make_type {
         if $type eq 'gmake' and $minus_v =~ /GNU make/i;
     return $maketype2true{$type} = 1
         if $type eq 'bsdmake'
-      and $minus_v =~ /^usage: make \[-BeikNnqrstWwX\]/im;
+      and $minus_v =~ /^usage:.*make\s*\[-B/im;
     $maketype2true{$type} = 0; # it wasn't whatever you asked
 }
 

lib/ExtUtils/MM_Unix.pm

@@ -3471,14 +3471,16 @@ sub replace_manpage_separator {
 
 =item cd
 
+On BSD make, will add a countervailing C<cd ..> on each command since
+parallel builds run all the commands in a recipe in the same shell.
+
 =cut
 
 sub cd {
     my($self, $dir, @cmds) = @_;
-
+    @cmds = map "$_ && cd $Updir", @cmds if $self->is_make_type('bsdmake');
     # No leading tab and no trailing newline makes for easier embedding
-    my $make_frag = join "\n\t", map { "cd $dir && $_" } @cmds;
-
+    my $make_frag = join "\n\t", map "cd $dir && $_", @cmds;
     return $make_frag;
 }