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APACHE_MODPATH_INIT(lua)

dnl Check for Lua 5.1 Libraries
dnl CHECK_LUA(ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
dnl Sets:
dnl  LUA_CFLAGS
dnl  LUA_LIBS
AC_DEFUN([CHECK_LUA],
[dnl

AC_ARG_WITH(
    lua,
    [AC_HELP_STRING([--with-lua=PATH],[Path to the Lua 5.1 prefix])],
    lua_path="$withval",
    :)

dnl # Determine lua lib directory
if test -z "$lua_path"; then
    test_paths=". /usr/local /usr"
else
    test_paths="${lua_path}"
fi

AC_CHECK_LIB(m, pow, lib_m="-lm")
AC_CHECK_LIB(m, sqrt, lib_m="-lm")
for x in $test_paths ; do
  if test "x$x" = "x."; then
    AC_CHECK_HEADER(lua.h,[
        save_CFLAGS=$CFLAGS
        save_LDFLAGS=$LDFLAGS
        CFLAGS="$CFLAGS"
        LDFLAGS="$LDFLAGS $lib_m"
        AC_CHECK_LIB(lua5.1, luaL_newstate, [
            LUA_LIBS="-llua5.1 $lib_m"
        ],[
            AC_CHECK_LIB(lua-5.1, luaL_newstate, [
                LUA_LIBS="-llua-5.1 $lib_m"
            ],[
                AC_CHECK_LIB(lua, luaL_newstate, [
                    LUA_LIBS="-llua $lib_m"
                ])
            ])
        ])
        LUA_CFLAGS=
        CFLAGS=$save_CFLAGS
        LDFLAGS=$save_LDFLAGS
        break
    ])
  else
    AC_MSG_CHECKING([for lua.h in ${x}/include/lua5.1])
    if test -f ${x}/include/lua5.1/lua.h; then
        AC_MSG_RESULT([yes])
        save_CFLAGS=$CFLAGS
        save_LDFLAGS=$LDFLAGS
        CFLAGS="$CFLAGS"
        LDFLAGS="-L$x/lib $LDFLAGS $lib_m"
        AC_CHECK_LIB(lua5.1, luaL_newstate, [
            LUA_LIBS="-L$x/lib -llua5.1 $lib_m"
            if test "x$ap_platform_runtime_link_flag" != "x"; then
               APR_ADDTO(LUA_LIBS, [$ap_platform_runtime_link_flag$x/lib])
            fi
            LUA_CFLAGS="-I$x/include/lua5.1"
            ])
        CFLAGS=$save_CFLAGS
        LDFLAGS=$save_LDFLAGS
        break
    else
        AC_MSG_RESULT([no])
    fi
    AC_MSG_CHECKING([for lua.h in ${x}/include/lua51])
    if test -f ${x}/include/lua51/lua.h; then
        AC_MSG_RESULT([yes])
        save_CFLAGS=$CFLAGS
        save_LDFLAGS=$LDFLAGS
        CFLAGS="$CFLAGS"
        LDFLAGS="-L$x/lib/lua51 $LDFLAGS $lib_m"
        AC_CHECK_LIB(lua, luaL_newstate, [
            LUA_LIBS="-L$x/lib/lua51 -llua $lib_m"
            if test "x$ap_platform_runtime_link_flag" != "x"; then
               APR_ADDTO(LUA_LIBS, [$ap_platform_runtime_link_flag$x/lib/lua51])
            fi
            LUA_CFLAGS="-I$x/include/lua51"
            ])
        CFLAGS=$save_CFLAGS
        LDFLAGS=$save_LDFLAGS
        break
    else
        AC_MSG_RESULT([no])
    fi
    AC_MSG_CHECKING([for lua.h in ${x}/include])
    if test -f ${x}/include/lua.h; then
        AC_MSG_RESULT([yes])
        save_CFLAGS=$CFLAGS
        save_LDFLAGS=$LDFLAGS
        CFLAGS="$CFLAGS"
        LDFLAGS="-L$x/lib $LDFLAGS $lib_m"
        AC_CHECK_LIB(lua, luaL_newstate, [
            LUA_LIBS="-L$x/lib -llua $lib_m"
            if test "x$ap_platform_runtime_link_flag" != "x"; then
               APR_ADDTO(LUA_LIBS, [$ap_platform_runtime_link_flag$x/lib])
            fi
            LUA_CFLAGS="-I$x/include"
            ])
        CFLAGS=$save_CFLAGS
        LDFLAGS=$save_LDFLAGS
        break
    else
        AC_MSG_RESULT([no])
    fi
  fi
done

AC_SUBST(LUA_LIBS)
AC_SUBST(LUA_CFLAGS)

if test -z "${LUA_LIBS}"; then
  AC_MSG_WARN([*** Lua 5.1 library not found.])
  ifelse([$2], ,
    enable_lua="no"
    if test -z "${lua_path}"; then
        AC_MSG_WARN([Lua 5.1 library is required])
    else
        AC_MSG_ERROR([Lua 5.1 library is required])
    fi,
    $2)
else
  AC_MSG_NOTICE([using '${LUA_LIBS}' for Lua Library])
  AC_ARG_ENABLE(luajit,APACHE_HELP_STRING(--enable-luajit,Enable LuaJit Support),
  [
    if test "$enableval" = "yes"; then
      APR_ADDTO(MOD_CPPFLAGS, ["-DAP_ENABLE_LUAJIT"])
    fi
  ])
  ifelse([$1], , , $1) 
fi 
])

lua_objects="lua_apr.lo lua_config.lo mod_lua.lo lua_request.lo lua_vmprep.lo lua_dbd.lo lua_passwd.lo"

APACHE_MODULE(lua, Apache Lua Framework, $lua_objects, , , [
  CHECK_LUA()
  if test "x$enable_lua" != "xno" ; then
    APR_ADDTO(MOD_INCLUDES, [$LUA_CFLAGS])
    APR_ADDTO(MOD_LUA_LDADD, [$LUA_LIBS])
  fi
])

APR_ADDTO(INCLUDES, [-I\$(top_srcdir)/$modpath_current])

APACHE_MODPATH_FINISH