Add target to build it automatically upon "make" / MAKEALL. This can/should
be set by board / cpu specific headers if a special U-Boot image is
required for this SoC / board.

E.g. used by Marvell Armada XP to automatically build the u-boot.kwb
target.

Signed-off-by: Stefan Roese <[email protected]>
Cc: Masahiro Yamada <[email protected]>

---

 Makefile | 5 +++++
 README   | 8 ++++++++
 2 files changed, 13 insertions(+)

diff --git a/Makefile b/Makefile
index e45a25c..44572c0 100644
--- a/Makefile
+++ b/Makefile
@@ -742,6 +742,11 @@ endif
 endif
 endif
 
+# Add optional build target if defined in board/cpu/soc headers
+ifneq ($(CONFIG_BUILD_TARGET),)
+ALL-y += $(CONFIG_BUILD_TARGET:"%"=%)
+endif
+
 LDFLAGS_u-boot += $(LDFLAGS_FINAL)
 ifneq ($(CONFIG_SYS_TEXT_BASE),)
 LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
diff --git a/README b/README
index fe5cacb..4b4633c 100644
--- a/README
+++ b/README
@@ -2657,6 +2657,14 @@ CBFS (Coreboot Filesystem) support
                200 ms.
 
 - Configuration Management:
+               CONFIG_BUILD_TARGET
+
+               Some SoCs need special image types (e.g. U-Boot binary
+               with a special header) as build targets. By defining
+               CONFIG_BUILD_TARGET in the SoC / board header, this
+               special image will be automatically built upon calling
+               make / MAKEALL.
+
                CONFIG_IDENT_STRING
 
                If defined, this string will be added to the U-Boot
-- 
2.0.1

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