From: Ben Wolsieffer <lopsided98@users.noreply.github.com>
Date: Wed, 5 Dec 2018 17:31:44 +0000 (-0500)
Subject: Use autoconf variable for C preprocessor
X-Git-Tag: zfs-0.7.13~19
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=14a5e48fb92210541ffd04081c313f4d6061a4d9;p=zfs

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
---

diff --git a/config/kernel.m4 b/config/kernel.m4
index 3777f45c8..8f0a65666 100644
--- a/config/kernel.m4
+++ b/config/kernel.m4
@@ -255,7 +255,7 @@ 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"], [