diff options
| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2020-04-14 03:01:37 -0600 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2020-04-14 03:02:07 -0600 |
| commit | fcf7f20e2fc039bafc5e78104e1d9fae2852b50d (patch) | |
| tree | fc477fbf9ecc3f11d9a20cf73eb7574d0392010a /src/compat/Kbuild.include | |
| parent | c15894ad17cb0760471c2dd798bfbbea2081b4db (diff) | |
compat: error out if bc is missing
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'src/compat/Kbuild.include')
| -rw-r--r-- | src/compat/Kbuild.include | 6 |
1 files changed, 5 insertions, 1 deletions
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 |