[PATCH v2 for-rust-for-linux] init/Kconfig: Specify the interpreter for rust-version.sh

From: SeongJae Park
Date: Mon Jan 10 2022 - 04:01:03 EST


Some common tools like 'diff' don't support permissions of the files.
Due to that, 'rust-version.sh' in some trees including '-mm' result in
having no execution permission, and therefore build fails like below:

$ make O=../linux.out/ olddefconfig
make[1]: Entering directory 'linux.out'
GEN Makefile
sh: 1: linux/scripts/rust-version.sh: Permission denied
init/Kconfig:71: syntax error
init/Kconfig:70: invalid statement
linux/scripts/kconfig/Makefile:77: recipe for target 'olddefconfig' failed
make[2]: *** [olddefconfig] Error 1
linux/Makefile:666: recipe for target 'olddefconfig' failed
make[1]: *** [olddefconfig] Error 2
make[1]: Leaving directory 'linux.out'
Makefile:226: recipe for target '__sub-make' failed
make: *** [__sub-make] Error 2

It's not a big deal, but not so fun. This commit works around the issue
by specifying the interpreter for 'rust-version.sh' in the Kconfig file.
The ugly work around wouldn't be needed once 'rust-version.sh' file is
merged in the mainline with the execution permission.

Signed-off-by: SeongJae Park <sj@xxxxxxxxxx>
Reviewed-by: Wei Liu <wei.liu@xxxxxxxxxx>
---
Changes from v1
(https://lore.kernel.org/all/20220106123357.16220-1-sj@xxxxxxxxxx/)
- Collect 'Reviewed-by:' from Wei Liu
- Specify that this is temporal workaround and when it can be reverted
(Miguel Ojeda)

init/Kconfig | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/init/Kconfig b/init/Kconfig
index cd23faa163d1..d3707b9f222c 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -67,7 +67,13 @@ config HAS_RUST
config RUSTC_VERSION
depends on HAS_RUST
int
- default $(shell,$(srctree)/scripts/rust-version.sh $(RUSTC))
+ # Because some common tools like 'diff' don't support permissions of
+ # the files, 'rust-version.sh' in some trees that managed with such
+ # tools result in having no execution permission. As a temporal work
+ # around, we specify the interpreter ('/bin/sh'). It will be unneeded
+ # once 'rust-version.sh' is merged in the mainline with its execution
+ # permission.
+ default $(shell,/bin/sh $(srctree)/scripts/rust-version.sh $(RUSTC))

config CC_CAN_LINK
bool
--
2.17.1