add new ADK Symbol PKG_NEEDS

There are a lot of packages which needs special features either
toolchain or hardware features. Add a new symbol which will be
used to disable packages, when a toolchain for example does
not provide this feature.

At the moment following features are required to set for a
package: threads rt c++.

There will follow: mmu iconv.

This will help to better support targets without MMU or
threading support.

134 files changed, 267 insertions, 158 deletions

diff --git a/adk/tools/pkgmaker.c b/adk/tools/pkgmaker.c
index 4dce5ada1..a256647d9 100644
--- a/adk/tools/pkgmaker.c
+++ b/adk/tools/pkgmaker.c
@@ -1,7 +1,7 @@
 /*
  * pkgmaker - create package meta-data for OpenADK buildsystem
  *
- * Copyright (C) 2010-2014 Waldemar Brodkorb <wbx@openadk.org>
+ * Copyright (C) 2010-2015 Waldemar Brodkorb <wbx@openadk.org>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -14,7 +14,7 @@
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
 #include <ctype.h>
@@ -327,7 +327,7 @@ int main() {
 	char dir[MAXPATH];
 	char variable[2*MAXVAR];
 	char *key, *value, *token, *cftoken, *sp, *hkey, *val, *pkg_fd;
-	char *pkg_name, *pkg_depends, *pkg_depends_system, *pkg_depends_libc, *pkg_section, *pkg_descr, *pkg_url;
+	char *pkg_name, *pkg_depends, *pkg_needs, *pkg_depends_system, *pkg_depends_libc, *pkg_section, *pkg_descr, *pkg_url;
 	char *pkg_cxx, *pkg_subpkgs, *pkg_cfline, *pkg_dflt;
 	char *pkgname, *sysname, *pkg_debug, *pkg_bb;
 	char *pkg_libc_depends, *pkg_host_depends, *pkg_system_depends, *pkg_arch_depends, *pkg_flavours, *pkg_flavours_string, *pkg_choices, *pseudo_name;
@@ -342,6 +342,7 @@ int main() {
 	pkg_section = NULL;
 	pkg_url = NULL;
 	pkg_depends = NULL;
+	pkg_needs = NULL;
 	pkg_depends_system = NULL;
 	pkg_depends_libc = NULL;
 	pkg_opts = NULL;
@@ -566,6 +567,8 @@ int main() {
 						continue;
 					if ((parse_var(buf, "PKG_DEPENDS", pkg_depends, &pkg_depends)) == 0)
 						continue;
+					if ((parse_var(buf, "PKG_NEEDS", pkg_needs, &pkg_needs)) == 0)
+						continue;
 					if ((parse_var_with_system(buf, "PKG_DEPENDS_", pkg_depends_system, &pkg_depends_system, &sysname, 12)) == 0)
 						continue;
 					if ((parse_var_with_system(buf, "PKG_DEPENDS_", pkg_depends_libc, &pkg_depends_libc, &sysname, 12)) == 0)
@@ -626,6 +629,8 @@ int mai