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diff --git a/rubbos/app/httpd-2.0.64/build/make_var_export.awk b/rubbos/app/httpd-2.0.64/build/make_var_export.awk
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index 00000000..b28e20ea
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+++ b/rubbos/app/httpd-2.0.64/build/make_var_export.awk
@@ -0,0 +1,75 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+#
+# Based on apr's make_export.awk, which is
+# based on Ryan Bloom's make_export.pl
+
+/^#[ \t]*if(def)? (AP[RU]?_|!?defined).*/ {
+ if (old_filename != FILENAME) {
+ if (old_filename != "") printf("%s", line)
+ macro_no = 0
+ found = 0
+ count = 0
+ old_filename = FILENAME
+ line = ""
+ }
+ macro_stack[macro_no++] = macro
+ macro = substr($0, length($1)+2)
+ count++
+ line = line "#ifdef " macro "\n"
+ next
+}
+
+/^#[ \t]*endif/ {
+ if (count > 0) {
+ count--
+ line = line "#endif /* " macro " */\n"
+ macro = macro_stack[--macro_no]
+ }
+ if (count == 0) {
+ if (found != 0) {
+ printf("%s", line)
+ }
+ line = ""
+ }
+ next
+}
+
+function add_symbol (sym_name) {
+ if (count) {
+ found++
+ }
+ for (i = 0; i < count; i++) {
+ line = line "\t"
+ }
+ line = line sym_name "\n"
+
+ if (count == 0) {
+ printf("%s", line)
+ line = ""
+ }
+}
+
+/^[ \t]*(extern[ \t]+)?AP[RU]?_DECLARE_DATA .*;$/ {
+ varname = $NF;
+ gsub( /[*;]/, "", varname);
+ gsub( /\[.*\]/, "", varname);
+ add_symbol(varname);
+}
+
+END {
+ printf("%s", line)
+}