Build system: add include directories and dependencies for generators

In the case of generating a file like this:

    GENERATE[foo.S]=mkfoo.pl arg1 arg2

the 'mkfoo.pl' generator itself might need to include other files,
such as perl modules within our source tree.  We can reuse already
existing syntax for it, like this:

    INCLUDE[mkfoo.pl]=module/path

or:

    DEPEND[mkfoo.pl]=modules/mymodule.pm

This change implements the support for such constructs, and for the
DEPEND statement, for any value that indicates a perl module (.pm
file), it will automatically infer an INCLUDE statement for its
directory, just like it does for C header files, so you won't have do
write this:

    DEPEND[mkfoo.pl]=modules/mymodule.pm
    INCLUDE[mkfoo.pl]=modules

Reviewed-by: Emilia Käsper <emilia@openssl.org>

1 files changed, 4 insertions, 3 deletions

diff --git a/Configurations/windows-makefile.tmpl b/Configurations/windows-makefile.tmpl
index c3233eeb08..159d57c931 100644
--- a/Configurations/windows-makefile.tmpl
+++ b/Configurations/windows-makefile.tmpl
@@ -252,17 +252,18 @@ configdata.pm: {- $config{build_file_template} -} $(SRCDIR)\Configure
       my %args = @_;
       (my $target = $args{src}) =~ s/\.[sS]$/.asm/;
       my $generator = join(" ", @{$args{generator}});
+      my $generator_incs = join("", map { " -I".$_ } @{$args{generator_incs}});
       my $incs = join("", map { " /I ".$_ } @{$args{incs}});
-      my $deps = join(" ", @{$args{deps}});
+      my $deps = join(" ", @{$args{generator_deps}}, @{$args{deps}});
 
       if ($target !~ /\.asm$/) {
           return <<"EOF";
 $target: $args{generator}->[0] $deps
-	\$(PERL) $generator > \$@
+	\$(PERL)$generator_incs $generator > \$@
 EOF
       } else {
           if ($args{generator}->[0] =~ /\.pl$/) {
-              $generator = '$(PERL) '.$generator;
+              $generator = '$(PERL)'.$generator_incs.' '.$generator;
           } elsif ($args{generator}->[0] =~ /\.S$/) {
               $generator = undef;
           } else {