From 2aa398f3aa907b71e1f827aec8e59d5dd081cb6f Mon Sep 17 00:00:00 2001
From: Ben Wolsieffer <lopsided98@users.noreply.github.com>
Date: Wed, 5 Dec 2018 12:31:44 -0500
Subject: [PATCH] Use autoconf variable for C preprocessor

This fixes the build when cross-compiling, where the preprocessor might
be prefixed.

Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Ben Wolsieffer <benwolsieffer@gmail.com>
Closes #8180
---
 config/kernel.m4 | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/config/kernel.m4 b/config/kernel.m4
index 118f1d8dc..7330c00e1 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -275,7 +275,7 @@ AC_DEFUN([ZFS_AC_KERNEL], [
 	AS_IF([test "$utsrelease"], [
 		kernsrcver=`(echo "#include <$utsrelease>";
 		             echo "kernsrcver=UTS_RELEASE") |
-		             cpp -I $kernelbuild/include |
+		             ${CPP} -I $kernelbuild/include - |
 		             grep "^kernsrcver=" | cut -d \" -f 2`
 
 		AS_IF([test -z "$kernsrcver"], [
-- 
2.40.0