buildsys: Add helper to list suid applets

Add a helper script that lists all applets that
- do or may require SUID provileges (busybox.cfg.suid)
- do not require SUID provileges (busybox.cfg.nosuid)

Some setups prefer to build two busybox binaries, one that is suid which
contains all applets that do or may require suid privileges, and a
second one for all the rest (which drops suid). To ease splitting these
two binaries, generate a list of CONFIG_ items for the suid binary.

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/Makefile.custom b/Makefile.custom
index 6da79e6e4..3561e5768 100644
--- a/Makefile.custom
+++ b/Makefile.custom
@@ -3,7 +3,12 @@
 # ==========================================================================
 
 busybox.links: $(srctree)/applets/busybox.mkll $(objtree)/include/autoconf.h include/applets.h
-        $(Q)-$(SHELL) $^ >$@
+        $(Q)-$(SHELL) $^ > $@
+
+busybox.cfg.suid: $(srctree)/applets/busybox.mksuid $(objtree)/include/autoconf.h include/applets.h
+        $(Q)-SUID="yes" $(SHELL) $^ > $@
+busybox.cfg.nosuid: $(srctree)/applets/busybox.mksuid $(objtree)/include/autoconf.h include/applets.h
+        $(Q)-SUID="DROP" $(SHELL) $^ > $@
 
 .PHONY: install
 ifeq ($(CONFIG_INSTALL_APPLET_SYMLINKS),y)