build: add support to && in DEPENDS

Adds support to && operand in DEPENDS.  Also, fixes generation of ||
dependencies by scripts/package-metadata.pl.

The precedence order from higher to lower is && then ||.  Use of
parentheses to change the order is not supported. As before, they are
silently ignored.  Use them for readability only.

Signed-off-by: Eneas U de Queiroz <cote2004-github@yahoo.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com> [DMARC removal]

include/package-ipkg.mk

@@ -35,7 +35,8 @@ PARENR :=)
 
 dep_split=$(subst :,$(space),$(1))
 dep_rem=$(subst !,,$(subst $(strip $(PARENL)),,$(subst $(strip $(PARENR)),,$(word 1,$(call dep_split,$(1))))))
-dep_confvar=$(strip $(foreach cond,$(subst ||, ,$(call dep_rem,$(1))),$(CONFIG_$(cond))))
+dep_and=dep_and_res:=$$(and $(subst $(space),$(comma),$(foreach cond,$(subst &&, ,$(1)),$$(CONFIG_$(cond)))))
+dep_confvar=$(strip $(foreach cond,$(subst ||, ,$(call dep_rem,$(1))),$(eval $(call dep_and,$(cond)))$(dep_and_res)))
 dep_pos=$(if $(call dep_confvar,$(1)),$(call dep_val,$(1)))
 dep_neg=$(if $(call dep_confvar,$(1)),,$(call dep_val,$(1)))
 dep_if=$(if $(findstring !,$(1)),$(call dep_neg,$(1)),$(call dep_pos,$(1)))

scripts/package-metadata.pl

@@ -358,14 +358,30 @@ sub gen_package_config() {
 	print_package_overrides();
 }
 
+sub and_condition($) {
+	my $condition = shift;
+	my @spl_and = split('\&\&', $condition);
+	if (@spl_and == 1) {
+		return "\$(CONFIG_$spl_and[0])";
+	}
+	return "\$(and " . join (',', map("\$(CONFIG_$_)", @spl_and)) . ")";
+}
+
+sub gen_condition ($) {
+	my $condition = shift;
+	# remove '!()', just as include/package-ipkg.mk does
+	$condition =~ s/[()!]//g;
+	return join("", map(and_condition($_), split('\|\|', $condition)));
+}
+
 sub get_conditional_dep($$) {
 	my $condition = shift;
 	my $depstr = shift;
 	if ($condition) {
 		if ($condition =~ /^!(.+)/) {
-			return "\$(if \$(CONFIG_$1),,$depstr)";
+			return "\$(if " . gen_condition($1) . ",,$depstr)";
 		} else {
-			return "\$(if \$(CONFIG_$condition),$depstr)";
+			return "\$(if " . gen_condition($condition) . ",$depstr)";
 		}
 	} else {
 		return $depstr;