Create symbols to export in libtdb dynamically from tdb.h.

This adds a general mechanism to create version-scripts for
linking shared libraries from one or several header files,
similar to mkproto.sh/awk.

Michael
(This used to be commit 65817703c49a7410f4f0c8b46494ede6169d9fa6)

1 files changed, 76 insertions, 0 deletions

diff --git a/source3/script/mksyms.awk b/source3/script/mksyms.awk
new file mode 100644
index 0000000000..a30bea4d34
--- /dev/null
+++ b/source3/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;
+}
+