[tip: x86/build] x86/build: Use $(CONFIG_SHELL)

[tip-bot2 for Andrew Morton]

The following commit has been merged into the x86/build branch of tip:

Commit-ID:     0be11088b848774ae1f693169fdb9575e0ff06ba
Gitweb:        https://git.kernel.org/tip/0be11088b848774ae1f693169fdb9575e0ff06ba
Author:        Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
AuthorDate:    Tue, 05 May 2020 14:26:51 -07:00
Committer:     Ingo Molnar <mingo@xxxxxxxxxx>
CommitterDate: Sun, 17 May 2020 16:01:33 +03:00

x86/build: Use $(CONFIG_SHELL)

When scripts/x86-check-compiler.sh doesn't have the executable bit set:

  q:/usr/src/25> make clean
  make: execvp: ./scripts/x86-check-compiler.sh: Permission denied

Fix this by using $(CONFIG_SHELL).

This will happen if the user downloads and applies patch-5.7.tar.gz, since
patch(1) doesn't preserve the x bit.

Fixes: 73da86741e7f7 ("x86/build: Check whether the compiler is sane")
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Borislav Petkov <bp@xxxxxxx>
Link: https://lkml.kernel.org/r/20200505211932.GE6880@xxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 arch/x86/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 38d3eec..9e22791 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -2,7 +2,7 @@
 # Unified Makefile for i386 and x86_64
 
 #  Check the compiler
-sane_compiler := $(shell $(srctree)/scripts/x86-check-compiler.sh $(CC))
+sane_compiler := $($(CONFIG_SHELL) $(srctree)/scripts/x86-check-compiler.sh $(CC))
 $(if $(sane_compiler),$(error $(CC) check failed. Aborting),)
 
 # select defconfig based on actual architecture