[U-Boot] [PATCH v9 15/30] autoconfig.mk: Make it possible to define configs from other configs

Benoît Thébaudeau
2013-03-06T18:59:21Z

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: Beno?t Th?baudeau <benoit.thebaudeau@advansee.com>
---
Changes in v9:
- Add detailed patch description.

Changes in v8:
- New patch.

Changes in v7: None
Changes in v6: None
Changes in v5: None
Changes in v4: None
Changes in v3: None
Changes in v2: None

tools/scripts/define2mk.sed | 2 ++
1 file changed, 2 insertions(+)

diff --git a/tools/scripts/define2mk.sed b/tools/scripts/define2mk.sed
index 13e2845..c641edf 100644
--- a/tools/scripts/define2mk.sed
+++ b/tools/scripts/define2mk.sed
@@ -24,6 +24,8 @@
s/="\([0-9][0-9]*\)"/=\1/;
# ... and from hex numbers
s/="\(0[Xx][0-9a-fA-F][0-9a-fA-F]*\)"/=\1/;
+ # ... and from configs defined from other configs
+ s/="\(CONFIG_[A-Za-z0-9_][A-Za-z0-9_]*\)"/=$(\1)/;
# Change '1' and empty values to "y" (not perfect, but
# supports conditional compilation in the makefiles
s/=$/=y/;
--
1.7.10.4