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       make - A Make Utility for Erlang


       The module make provides a set of functions similar to the UNIX type Make functions.


       all() -> up_to_date | error
       all(Options) -> up_to_date | error


                 Options = [Option]
                  Option = noexec | load | netload | <compiler option>

              This  function  first  looks  in  the  current  working  directory for a file named
              Emakefile (see below) specifying the set of modules  to  compile  and  the  compile
              options to use. If no such file is found, the set of modules to compile defaults to
              all modules in the current working directory.

              Traversing the set of modules, it then recompiles every module for which  at  least
              one of the following conditions apply:

                * there is no object file, or

                * the source file has been modified since it was last compiled, or,

                * an include file has been modified since the source file was last compiled.

              As  a side effect, the function prints the name of each module it tries to compile.
              If compilation fails for a module, the make procedure stops and error is returned.

              Options is a list of make- and compiler options. The following make options exist:

                * noexec
                   No execution mode. Just prints the name  of  each  module  that  needs  to  be

                * load
                   Load mode. Loads all recompiled modules.

                * netload
                   Net load mode. Loads all recompiled modules an all known nodes.

              All  items  in Options that are not make options are assumed to be compiler options
              and are passed as-is to compile:file/2. Options defaults to [].

       files(ModFiles) -> up_to_date | error
       files(ModFiles, Options) -> up_to_date | error


                 ModFiles = [Module | File]
                  Module = atom()
                  File = string()
                 Options = [Option]
                  Option = noexec | load | netload | <compiler option>

              files/1,2 does exactly the same thing as all/0,1 but for  the  specified  ModFiles,
              which is a list of module or file names. The file extension .erl may be omitted.

              The  Emakefile  (if  it  exists)  in the current directory is searched for compiler
              options for each module. If a given module  does  not  exist  in  Emakefile  or  if
              Emakefile does not exist, the module is still compiled.


       make:all/0,1  and  make:files/1,2  looks in the current working directory for a file named
       Emakefile. If it exists, Emakefile should contain elements like this:


       Modules is an atom or a list of atoms. It can be

         * a module name, e.g. file1

         * a module name in another directory, e.g. ../foo/file3

         * a set of modules specified with a wildcards, e.g. 'file*'

         * a wildcard indicating all modules in current directory, i.e. '*'

         * a list of any of the above, e.g. ['file*','../foo/file3','File4']

       Options is a list of compiler options.

       Emakefile is read from top to bottom. If a module matches more than one entry,  the  first
       match  is  valid.  For example, the following Emakefile means that file1 shall be compiled
       with the options [debug_info,{i,"../foo"}], while all other files in the current directory
       shall be compiled with only the debug_info flag.