From c31f8664cff475b8f4160506e582fc423c71f381 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Thu, 4 Jul 2019 11:14:41 +0200
Subject: compat: define conversion constants for ancient kernels

---
 src/compat/Kbuild.include | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'src/compat/Kbuild.include')

diff --git a/src/compat/Kbuild.include b/src/compat/Kbuild.include
index 95041a9..1b555f8 100644
--- a/src/compat/Kbuild.include
+++ b/src/compat/Kbuild.include
@@ -47,6 +47,10 @@ ccflags-y += -include $(kbuild-dir)/compat/memneq/include.h
 wireguard-y += compat/memneq/memneq.o
 endif
 
+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)
+endif
+
 ifeq ($(wildcard $(srctree)/arch/arm/include/asm/neon.h)$(CONFIG_ARM),y)
 ccflags-y += -I$(kbuild-dir)/compat/neon-arm/include
 endif
-- 
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