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# 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.

function(generate_builtin_modules_c output_filename module_list)
  list(PREPEND module_list "core")

  set(content "")

  string(APPEND content "/*\n")
  string(APPEND content " * modules.c --- automatically generated by Apache\n")
  string(APPEND content " * configuration script.  DO NOT HAND EDIT!!!!!\n")
  string(APPEND content " */\n")
  string(APPEND content "\n")
  string(APPEND content "#include \"ap_config.h\"\n")
  string(APPEND content "#include \"httpd.h\"\n")
  string(APPEND content "#include \"http_config.h\"\n")
  string(APPEND content "\n")

  foreach(module ${module_list})
    string(APPEND content "extern module ${module}_module\;\n")
  endforeach()

  string(APPEND content "\n")
  string(APPEND content "/*\n")
  string(APPEND content " *  Modules which implicitly form the\n")
  string(APPEND content " *  list of activated modules on startup,\n")
  string(APPEND content " *  i.e. these are the modules which are\n")
  string(APPEND content " *  initially linked into the Apache processing\n")
  string(APPEND content " *  [extendable under run-time via AddModule]\n")
  string(APPEND content " */\n")

  string(APPEND content "AP_DECLARE_DATA module *ap_prelinked_modules[] = {\n")
  foreach(module ${module_list})
    string(APPEND content "  &${module}_module,\n")
  endforeach()
  string(APPEND content "  NULL\n")
  string(APPEND content "}\;\n")

  string(APPEND content "\n")
  string(APPEND content "/*\n")
  string(APPEND content " *  We need the symbols as strings for <IfModule> containers\n")
  string(APPEND content " */\n")
  string(APPEND content "\n")
  string(APPEND content "ap_module_symbol_t ap_prelinked_module_symbols[] = {\n")

  foreach(module ${module_list})
    string(APPEND content "  {\"${module}_module\", &${module}_module},\n")
  endforeach()

  string(APPEND content "  {NULL, NULL}\n")
  string(APPEND content "}\;\n")
  string(APPEND content "\n")
  string(APPEND content "/*\n")
  string(APPEND content " *  Modules which initially form the\n")
  string(APPEND content " *  list of available modules on startup,\n")
  string(APPEND content " *  i.e. these are the modules which are\n")
  string(APPEND content " *  initially loaded into the Apache process\n")
  string(APPEND content " *  [extendable under run-time via LoadModule]\n")
  string(APPEND content " */\n")
  string(APPEND content "module *ap_preloaded_modules[] = {\n")

  foreach(module ${module_list})
    string(APPEND content "  &${module}_module,\n")
  endforeach()

  string(APPEND content "  NULL\n")
  string(APPEND content "}\;\n")
  string(APPEND content "\n")

  file(WRITE ${output_filename} ${content})
endfunction()