Use stamp file rather than grouped targets for TF-A.
CI seems to have an old version of make which doesn't support grouped
outputs.
Change-Id: I4c693fff4641a68f938c142ca83f9a7d2672a73a
diff --git a/Makefile b/Makefile
index d482310..c244413 100644
--- a/Makefile
+++ b/Makefile
@@ -211,6 +211,7 @@
##
TFA_SRC := $(ROOT_DIR)/trusted-firmware-a
TFA_OUT := $(OUT_DIR)/trusted-firmware-a
+TFA_STAMP := $(TFA_OUT)/trusted-firmware-a.stamp
TFA_TOOLCHAIN ?= gcc-9.2
TFA_VERBOSE ?= $(VERBOSE)
$(eval $(call define_toolchain,$(TFA_TOOLCHAIN),TFA_))
@@ -231,8 +232,11 @@
.PHONY: tfa
tfa: $(TFA_OUT)/qemu/release/bl1.bin $(TFA_OUT)/qemu/release/bl2.bin $(TFA_OUT)/qemu/release/bl31.bin
-$(TFA_OUT)/qemu/release/bl1.bin $(TFA_OUT)/qemu/release/bl2.bin $(TFA_OUT)/qemu/release/bl31.bin &: FORCE
+# This should use grouped targets, but we don't have make 4.3 in our CI.
+$(TFA_OUT)/qemu/release/bl1.bin $(TFA_OUT)/qemu/release/bl2.bin $(TFA_OUT)/qemu/release/bl31.bin: $(TFA_STAMP)
+$(TFA_STAMP): FORCE
+ $(TFA_MAKE) all
+ touch $(TFA_STAMP)
.PHONY: tfa_clean
tfa_clean:
