From 006fd0c43c7c403b8671dfc46e5ee31e92480e1f Mon Sep 17 00:00:00 2001
From: Michael Adam <obnox@samba.org>
Date: Fri, 28 Aug 2009 15:01:17 +0200
Subject: [PATCH] tdb: add scripts to extract library symbols (exports file)
 from headers

Michael
---
 lib/tdb/script/mksyms.awk | 76 +++++++++++++++++++++++++++++++++++++++
 lib/tdb/script/mksyms.sh  | 45 +++++++++++++++++++++++
 2 files changed, 121 insertions(+)
 create mode 100644 lib/tdb/script/mksyms.awk
 create mode 100755 lib/tdb/script/mksyms.sh

diff --git a/lib/tdb/script/mksyms.awk b/lib/tdb/script/mksyms.awk
new file mode 100644
index 00000000000..a30bea4d340
--- /dev/null
+++ b/lib/tdb/script/mksyms.awk
@@ -0,0 +1,76 @@
+#
+# mksyms.awk
+#
+# Extract symbols to export from C-header files.
+# output in version-script format for linking shared libraries.
+#
+# Copyright (C) 2008 Micheal Adam <obnox@samba.org>
+#
+BEGIN {
+	inheader=0;
+	current_file="";
+	print "#"
+	print "# This file is automatically generated with \"make symbols\". DO NOT EDIT "
+	print "#"
+	print "{"
+	print "\tglobal:"
+}
+
+END {
+	print""
+	print "\tlocal: *;"
+	print "};"
+}
+
+{
+	if (FILENAME!=current_file) {
+		print "\t\t# The following definitions come from",FILENAME
+		current_file=FILENAME
+	}
+	if (inheader) {
+		if (match($0,"[)][ \t]*[;][ \t]*$")) {
+			inheader = 0;
+		}
+		next;
+	}
+}
+
+/^static/ || /^[ \t]*typedef/ || !/^[a-zA-Z\_]/ {
+	next;
+}
+
+/^extern[ \t]+[^()]+[;][ \t]*$/ {
+	gsub(/[^ \t]+[ \t]+/, "");
+	sub(/[;][ \t]*$/, "");
+	printf "\t\t%s;\n", $0;
+	next;
+}
+
+# look for function headers:
+{
+	gotstart = 0;
+	if ($0 ~ /^[A-Za-z_][A-Za-z0-9_]+/) {
+	gotstart = 1;
+	}
+	if(!gotstart) {
+		next;
+	}
+}
+
+/[_A-Za-z0-9]+[ \t]*[(].*[)][ \t]*;[ \t]*$/ {
+	sub(/[(].*$/, "");
+	gsub(/[^ \t]+[ \t]+/, "");
+	gsub(/^[*]/, "");
+	printf "\t\t%s;\n",$0;
+	next;
+}
+
+/[_A-Za-z0-9]+[ \t]*[(]/ {
+	inheader=1;
+	sub(/[(].*$/, "");
+	gsub(/[^ \t]+[ \t]+/, "");
+	gsub(/^[*]/, "");
+	printf "\t\t%s;\n",$0;
+	next;
+}
+
diff --git a/lib/tdb/script/mksyms.sh b/lib/tdb/script/mksyms.sh
new file mode 100755
index 00000000000..714d55abae6
--- /dev/null
+++ b/lib/tdb/script/mksyms.sh
@@ -0,0 +1,45 @@
+#! /bin/sh
+
+#
+# mksyms.sh
+#
+# Extract symbols to export from C-header files.
+# output in version-script format for linking shared libraries.
+#
+# This is the shell wrapper for the mksyms.awk core script.
+#
+# Copyright (C) 2008 Micheal Adam <obnox@samba.org>
+#
+
+LANG=C; export LANG
+LC_ALL=C; export LC_ALL
+LC_COLLATE=C; export LC_COLLATE
+
+if [ $# -lt 2 ]
+then
+  echo "Usage: $0 awk output_file header_files"
+  exit 1
+fi
+
+awk="$1"
+shift
+
+symsfile="$1"
+shift
+symsfile_tmp="$symsfile.$$.tmp~"
+
+proto_src="`echo $@ | tr ' ' '\n' | sort | uniq `"
+
+echo creating $symsfile
+
+mkdir -p `dirname $symsfile`
+
+${awk} -f `dirname $0`/mksyms.awk $proto_src > $symsfile_tmp
+
+if cmp -s $symsfile $symsfile_tmp 2>/dev/null
+then
+  echo "$symsfile unchanged"
+  rm $symsfile_tmp
+else
+  mv $symsfile_tmp $symsfile
+fi
-- 
2.34.1