From fcf7f20e2fc039bafc5e78104e1d9fae2852b50d Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Tue, 14 Apr 2020 03:01:37 -0600 Subject: compat: error out if bc is missing Signed-off-by: Jason A. Donenfeld --- src/compat/Kbuild.include | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/src/compat/Kbuild.include b/src/compat/Kbuild.include index db4b0a6..53a8bde 100644 --- a/src/compat/Kbuild.include +++ b/src/compat/Kbuild.include @@ -53,7 +53,11 @@ endif ifdef CONFIG_HZ ifeq ($(wildcard $(srctree)/include/generated/timeconst.h),) -ccflags-y += $(shell echo 'define gcd(a,b){auto t;while(b){t=b;b=a%b;a=t;};return a;};hz=$(CONFIG_HZ);cd=gcd(hz,1000000);print "-DHZ_TO_USEC_NUM=",1000000/cd," -DHZ_TO_USEC_DEN=",hz/cd;halt;' | bc -q) +HZ_IFDEF := $(shell echo 'define gcd(a,b){auto t;while(b){t=b;b=a%b;a=t;};return a;};hz=$(CONFIG_HZ);cd=gcd(hz,1000000);print "-DHZ_TO_USEC_NUM=",1000000/cd," -DHZ_TO_USEC_DEN=",hz/cd;halt;' | bc -q) +ifeq ($(HZ_IFDEF),) +$(error bc(1) is required for building) +endif +ccflags-y += $(HZ_IFDEF) endif endif -- cgit v1.2.3-59-g8ed1b