[PATCH] Makefile: Force regeneration of env.txt

[Andrew Davis <afd@ti.com>]

If the source .env file changes to one that is also older than
the generated env.txt file then it is not regenerated. This means
when switching board configs we do not regenerate the env. This
can be tested easily with:

$ make j721e_evm_a72_defconfig
$ make # this may fail to complete but that is okay for this test
$ make am64x_evm_a53_defconfig
$ make
$ vim include/generated/env.txt

Note this is still the J721e env not the AM64 config as expected.

There is probably a better way to detect if the dependency name changed,
but that may involve extra files and hashing contents, so let's just
force it for now.

Signed-off-by: Andrew Davis <afd@ti.com>
---
 Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Makefile b/Makefile
index 9be24c4ec61..d195590d4b0 100644
--- a/Makefile
+++ b/Makefile
@@ -1830,7 +1830,7 @@ quiet_cmd_envc = ENVC    $@
 		touch $@ ; \
 	fi
 
-include/generated/env.txt: $(wildcard $(ENV_FILE))
+include/generated/env.txt: $(wildcard $(ENV_FILE)) FORCE
 	$(call cmd,envc)
 
 # Write out the resulting environment, converted to a C string
-- 
2.39.2