[PATCH v6 01/15] x86: Raise minimum GCC version to 8.1

[Brian Gerst <brgerst@gmail.com>]

Stack protector support on 64-bit currently requires that the percpu
section is linked at absolute address 0 because older compilers fixed
the location of the canary value relative to the GS segment base.
GCC 8.1 introduced options to change where the canary value is located,
allowing it to be configured as a standard percpu variable.  This has
already been done for 32-bit.  Doing the same for 64-bit will enable
removing the code needed to support zero-based percpu.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
---
 scripts/min-tool-version.sh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/scripts/min-tool-version.sh b/scripts/min-tool-version.sh
index 91c91201212c..06c4e410ecab 100755
--- a/scripts/min-tool-version.sh
+++ b/scripts/min-tool-version.sh
@@ -19,6 +19,8 @@ binutils)
 gcc)
 	if [ "$ARCH" = parisc64 ]; then
 		echo 12.0.0
+	elif [ "$SRCARCH" = x86 ]; then
+		echo 8.1.0
 	else
 		echo 5.1.0
 	fi
-- 
2.47.1