From 73171714bc534d77d9a8fc0aa3b59b3a792fe2ee Mon Sep 17 00:00:00 2001
From: Josh Poimboeuf <jpoimboe@redhat.com>
Date: Tue, 1 Jul 2014 14:12:07 -0500
Subject: [PATCH] kpatch-build: gcc version checks
Ensure the version of the locally installed gcc matches the one used to
compile the kernel, and is >= 4.8.
Fixes #246.
---
kpatch-build/kpatch-build | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
diff --git a/kpatch-build/kpatch-build b/kpatch-build/kpatch-build
index 8b25fb7..9010658 100755
--- a/kpatch-build/kpatch-build
+++ b/kpatch-build/kpatch-build
@@ -102,6 +102,25 @@ find_dirs() {
return 1
}
+gcc_version_check() {
+ # ensure gcc version matches that used to build the kernel
+ local gccver=$(gcc --version |head -n1 |cut -d' ' -f3-)
+ local kgccver=$(strings $VMLINUX |grep "GCC:" |cut -d' ' -f3-)
+ if [[ $gccver != $kgccver ]]; then
+ warn "gcc/kernel version mismatch"
+ return 1
+ fi
+
+ # ensure gcc version is >= 4.8
+ gccver=$(echo $gccver |cut -d'.' -f1,2)
+ if [[ $gccver < 4.8 ]]; then
+ warn "gcc >= 4.8 required"
+ return 1
+ fi
+
+ return
+}
+
find_parent_obj() {
dir=$(dirname $1)
file=$(basename $1)
@@ -260,6 +279,8 @@ elif [[ $DISTRO = ubuntu ]]; then
export PATH=/usr/lib/ccache:$PATH
fi
+gcc_version_check || die
+
if [[ -n "$USERSRCDIR" ]]; then
echo "Using source directory at $USERSRCDIR"
SRCDIR="$USERSRCDIR"