Implement "make update-all-abi"

	* scripts/update-abilist.sh: New file.
	* Makefile (+subdir_targets): Add subdir_update-all-abi.
	* Makerules (update-all-abi-%, update-all-abi)
	(subdir_update-all-abi): New targets.
	* elf/Makefile (update-all-abi): New target.

1 files changed, 66 insertions, 0 deletions

diff --git a/scripts/update-abilist.sh b/scripts/update-abilist.sh
new file mode 100644
index 0000000000..0c2d0ffd37
--- /dev/null
+++ b/scripts/update-abilist.sh
@@ -0,0 +1,66 @@
+#!/bin/sh
+# Update abilist files based on differences on one architecture.
+# Copyright (C) 2015 Free Software Foundation, Inc.
+# This file is part of the GNU C Library.
+#
+# The GNU C Library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# The GNU C Library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with the GNU C Library; if not, see
+# <http://www.gnu.org/licenses/>.
+
+set -e
+export LC_ALL=C
+
+if [ $# -lt 3 ]; then
+  echo "usage: $0 OLD-FILE NEW-FILE FILES-TO-BE-PATCHED..." 1>&2
+  exit 2
+fi
+
+old_file="$1"
+shift
+new_file="$1"
+shift
+
+tmp_old_sorted="$(mktemp)"
+tmp_new_sorted="$(mktemp)"
+tmp_new_symbols="$(mktemp)"
+tmp_patched="$(mktemp)"
+
+cleanup () {
+  rm -f -- "$tmp_old_sorted" "$tmp_new_sorted" \
+    "$tmp_new_symbols" "$tmp_patched"
+}
+
+trap cleanup 0
+
+sort -u -o "$tmp_old_sorted" -- "$old_file"
+sort -u -o "$tmp_new_sorted" -- "$new_file"
+
+# -1 skips symbols only in $old_file (deleted symbols).
+# -3 skips symbols in both files (unchanged symbols).
+comm -1 -3 "$tmp_old_sorted" "$tmp_new_sorted" > "$tmp_new_symbols"
+
+new_symbol_count="$(wc -l < "$tmp_new_symbols")"
+if [ "$new_symbol_count" -eq 0 ]; then
+  echo "info: no symbols added" 1>&2
+  exit 0
+fi
+
+echo "info: $new_symbol_count symbol(s) added" 1>&2
+
+for to_be_patched in "$@" ; do
+  sort -u -o "$tmp_patched" -- "$to_be_patched" "$tmp_new_symbols"
+  if ! cmp -s -- "$to_be_patched" "$tmp_patched"; then
+    echo "info: updating $to_be_patched" 1>&2
+    cp -- "$tmp_patched" "$to_be_patched"
+  fi
+done