[XS] Change in coreboot[main]: Makefile.mk: Remove bc dependency

[Maximilian Brune (Code Review)]

Maximilian Brune has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/83313?usp=email )

Change subject: Makefile.mk: Remove bc dependency
......................................................................

Makefile.mk: Remove bc dependency

bc was added as dependency in commit:
229e021110: Makefile.inc: Add left shift macro

bc is not stated as dependency in our docs (e.g. package installation).
If you don't have bc installed you can easily get false positives on
coreboot builds. For example you build a mainboard and coreboot tells
you the build succeeded, even though you don't have bc installed.

This patch is from julius comment on CB:21601.

Signed-off-by: Maximilian Brune 
Change-Id: I6ab4bc2bd7a45e84b923d4fe7ec473e6c7db2146
---
M Makefile.mk
1 file changed, 1 insertion(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/13/83313/1

diff --git a/Makefile.mk b/Makefile.mk
index a16089d..edd01ae 100644
--- a/Makefile.mk
+++ b/Makefile.mk
@@ -171,7 +171,7 @@
 int-multiply=$(if $(filter 1,$(words $1)),$(strip $1),$(call int-multiply,$(call _int-multiply2,$(word 1,$1),$(word 2,$1)) $(wordlist 3,$(words $1),$1)))
 int-divide=$(if $(filter 1,$(words $1)),$(strip $1),$(shell expr $(call _toint,$(word 1,$1)) / $(call _toint,$(word 2,$1))))
 int-remainder=$(if $(filter 1,$(words $1)),$(strip $1),$(shell expr $(call _toint,$(word 1,$1)) % $(call _toint,$(word 2,$1))))
-int-shift-left=$(shell echo "$(call _toint,$(word 1, $1)) * (2 ^ $(call _toint,$(word 2, $1)))" | bc)
+int-shift-left=$(shell expr $(call _toint,$(word 1, $1)) << $(call _toint,$(word 2, $1)))
 int-lt=$(if $(filter 1,$(words $1)),$(strip $1),$(shell expr $(call _toint,$(word 1,$1)) < $(call _toint,$(word 2,$1))))
 int-gt=$(if $(filter 1,$(words $1)),$(strip $1),$(shell expr $(call _toint,$(word 1,$1)) > $(call _toint,$(word 2,$1))))
 int-eq=$(if $(filter 1,$(words $1)),$(strip $1),$(shell expr $(call _toint,$(word 1,$1)) = $(call _toint,$(word 2,$1))))