tools headers UAPI: Sync openat2.h with the kernel sources

[linux-2.6-microblaze.git] / scripts / ld-version.sh

diff --git a/scripts/ld-version.sh b/scripts/ld-version.sh
index f2be0ff..a463273 100755 (executable)
--- a/scripts/ld-version.sh
+++ b/scripts/ld-version.sh
@@ -1,11 +1,73 @@
-#!/usr/bin/awk -f
+#!/bin/sh
 # SPDX-License-Identifier: GPL-2.0
-# extract linker version number from stdin and turn into single number
-       {
-       gsub(".*\\)", "");
-       gsub(".*version ", "");
-       gsub("-.*", "");
-       split($1,a, ".");
-       print a[1]*100000000 + a[2]*1000000 + a[3]*10000;
-       exit
-       }
+#
+# Print the linker name and its version in a 5 or 6-digit form.
+# Also, perform the minimum version check.
+
+set -e
+
+# When you raise the minimum linker version, please update
+# Documentation/process/changes.rst as well.
+bfd_min_version=2.23.0
+lld_min_version=10.0.1
+
+# Convert the version string x.y.z to a canonical 5 or 6-digit form.
+get_canonical_version()
+{
+       IFS=.
+       set -- $1
+
+       # If the 2nd or 3rd field is missing, fill it with a zero.
+       #
+       # The 4th field, if present, is ignored.
+       # This occurs in development snapshots as in 2.35.1.20201116
+       echo $((10000 * $1 + 100 * ${2:-0} + ${3:-0}))
+}
+
+orig_args="$@"
+
+# Get the first line of the --version output.
+IFS='
+'
+set -- $("$@" --version)
+
+# Split the line on spaces.
+IFS=' '
+set -- $1
+
+if [ "$1" = GNU -a "$2" = ld ]; then
+       shift $(($# - 1))
+       version=$1
+       min_version=$bfd_min_version
+       name=BFD
+       disp_name="GNU ld"
+elif [ "$1" = GNU -a "$2" = gold ]; then
+       echo "gold linker is not supported as it is not capable of linking the kernel proper." >&2
+       exit 1
+elif [ "$1" = LLD ]; then
+       version=$2
+       min_version=$lld_min_version
+       name=LLD
+       disp_name=LLD
+else
+       echo "$orig_args: unknown linker" >&2
+       exit 1
+fi
+
+# Some distributions append a package release number, as in 2.34-4.fc32
+# Trim the hyphen and any characters that follow.
+version=${version%-*}
+
+cversion=$(get_canonical_version $version)
+min_cversion=$(get_canonical_version $min_version)
+
+if [ "$cversion" -lt "$min_cversion" ]; then
+       echo >&2 "***"
+       echo >&2 "*** Linker is too old."
+       echo >&2 "***   Your $disp_name version:    $version"
+       echo >&2 "***   Minimum $disp_name version: $min_version"
+       echo >&2 "***"
+       exit 1
+fi
+
+echo $name $cversion