makefile: allow to disable all default-yes config variables with CONFIG_NOTHING=yes
All credit for this should be given to Patrick Georgi (see r1869).
Corresponding to flashrom svn r1944.
Signed-off-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
diff --git a/Makefile b/Makefile
index 00819c6..1511eef 100644
--- a/Makefile
+++ b/Makefile
@@ -642,6 +642,16 @@
# Disable wiki printing by default. It is only useful if you have wiki access.
CONFIG_PRINT_WIKI ?= no
+# Disable all features if CONFIG_NOTHING=yes is given unless CONFIG_EVERYTHING was also set
+ifeq ($(CONFIG_NOTHING), yes)
+ ifeq ($(CONFIG_EVERYTHING), yes)
+ $(error Setting CONFIG_NOTHING=yes and CONFIG_EVERYTHING=yes does not make sense)
+ endif
+ $(foreach var, $(filter CONFIG_%, $(.VARIABLES)),\
+ $(if $(filter yes, $($(var))),\
+ $(eval $(var)=no)))
+endif
+
# Enable all features if CONFIG_EVERYTHING=yes is given
ifeq ($(CONFIG_EVERYTHING), yes)
$(foreach var, $(filter CONFIG_%, $(.VARIABLES)),\