Give more flexibility to define configs that can be interpreted by make, e.g. to
define fallback values of configs like in the example below.
Before this change, the config lines:
#define CONFIG_SPL_MAX_SIZE 2048
#define CONFIG_SPL_PAD_TO CONFIG_SPL_MAX_SIZE
would have been changed in autoconfig.mk into:
CONFIG_SPL_MAX_SIZE=2048
CONFIG_SPL_PAD_TO="CONFIG_SPL_MAX_SIZE"
Hence, a make recipe using as an argument to $(OBJCOPY):
--pad-to=$(CONFIG_SPL_PAD_TO)
would have issued:
--pad-to="CONFIG_SPL_MAX_SIZE"
which means nothing for $(OBJCOPY) and makes it fail.
Thanks to this change, the config lines above are changed in autoconfig.mk into:
CONFIG_SPL_MAX_SIZE=2048
CONFIG_SPL_PAD_TO=$(CONFIG_SPL_MAX_SIZE)
Hence, the make recipe above now issues:
--pad-to=2048
as expected from the defined config.
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Reviewed-by: Tom Rini <trini@ti.com>
2979b26323