talloc: add script/abi_checks.sh. check for abi changes without gcc magic.

USAGE: abi_checks.sh LIBRARY_NAME header1 [header2 ...]

This creates symbol signature lists using the mksyms and mksigs scripts
and compares them with the checked in lists.

Michael

diff --git a/lib/talloc/script/abi_checks.sh b/lib/talloc/script/abi_checks.sh
new file mode 100755 (executable)
index 0000000..c34a659
--- /dev/null
+++ b/lib/talloc/script/abi_checks.sh
@@ -0,0 +1,91 @@
+#!/bin/sh
+
+#
+# abi_checks.sh - check for possible abi changes
+#
+# Copyright (C) 2009 Micheal Adam <obnox@samba.org>
+#
+# This program is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License as published by the Free
+# Software Foundation; either version 3 of the License, or (at your option)
+# any later version.
+#
+# This program 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 General Public License for
+# more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, see <http://www.gnu.org/licenses/>.
+#
+
+#
+# USAGE: abi_checks.sh LIBNAME header1 [header2 ...]
+#
+# This script creates symbol and signature lists from the provided header
+# files with the aid of the mksyms.sh and mksigs.pl scripts (saved as
+# $LIBNAME.exports.check and $LIBNAME.sigatures.check). It then compares
+# the resulting files with the files $LIBNAME.exports and $LIBNME.signatures
+# which it expects to find in the current directory.
+#
+
+LANG=C; export LANG
+LC_ALL=C; export LC_ALL
+LC_COLLATE=C; export LC_COLLATE
+
+script=$0
+dir_name=$(dirname ${script})
+
+if test x"$1" = "x" ; then
+       echo "USAGE: ${script} libname header [header ...]"
+       exit 1
+fi
+
+libname="$1"
+shift
+
+if test x"$1" = "x" ; then
+       echo "USAGE: ${script} libname header [header ...]"
+       exit 1
+fi
+
+headers="$*"
+
+exports_file=${libname}.exports
+exports_file_check=${exports_file}.check
+signatures_file=${libname}.signatures
+signatures_file_check=${signatures_file}.check
+
+
+${dir_name}/mksyms.sh awk ${exports_file_check} ${headers} 2>&1 > /dev/null
+
+cat ${headers} | ${dir_name}/mksigs.pl > ${signatures_file_check} 2> /dev/null
+
+normalize_exports_file() {
+       filename=$1
+       cat ${filename} \
+       | sed -e 's/^[ \t]*//g' \
+       | sed -e 's/^$//g' \
+       | sed -e 's/^#.*$//g' \
+       | sort | uniq > ${filename}.sort
+}
+
+normalize_exports_file ${exports_file}
+normalize_exports_file ${exports_file_check}
+
+normalize_exports_file ${signatures_file}
+normalize_exports_file ${signatures_file_check}
+
+diff -u ${exports_file}.sort ${exports_file_check}.sort
+if test "x$?" != "x0" ; then
+       echo "WARNING: possible ABI change detected in exports!"
+else
+       echo "exports check: OK"
+fi
+
+diff -u ${signatures_file}.sort ${signatures_file_check}.sort
+if test "x$?" != "x0" ; then
+       echo "WARNING: possible ABI change detected in signatures!"
+else
+       echo "signatures check: OK"
+fi