build_macros: add create sequence helper function
Add `CREATE_SEQ` function to generate sequence of numbers starting from
1 to allow easy comparison of a user defined macro with non-zero
positive numbers.
Change-Id: Ibcb336a223d958154b1007d08c428fbaf1e48664
Signed-off-by: Vijayenthiran Subramaniam <vijayenthiran.subramaniam@arm.com>
diff --git a/make_helpers/build_macros.mk b/make_helpers/build_macros.mk
index 1fa26cc..b6925d3 100644
--- a/make_helpers/build_macros.mk
+++ b/make_helpers/build_macros.mk
@@ -67,6 +67,17 @@
$(if $(__numeric),$(error $(1) must be numeric))
endef
+# CREATE_SEQ is a recursive function to create sequence of numbers from 1 to
+# $(2) and assign the sequence to $(1)
+define CREATE_SEQ
+$(if $(word $(2), $($(1))),\
+ $(eval $(1) += $(words $($(1))))\
+ $(eval $(1) := $(filter-out 0,$($(1)))),\
+ $(eval $(1) += $(words $($(1))))\
+ $(call CREATE_SEQ,$(1),$(2))\
+)
+endef
+
# IMG_LINKERFILE defines the linker script corresponding to a BL stage
# $(1) = BL stage (2, 30, 31, 32, 33)
define IMG_LINKERFILE