make (tools v4.1.2-rc0)

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A Make Utility for Erlang

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

Emakefile

make:all/0,1 and make:files/1,2 first looks for {emake, Emake} in options, then in the current working directory for a file named Emakefile. If present Emake should contain elements like this:

Modules.
{Modules,Options}.

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

  • a module name, for exmaple, file1
  • a module name in another directory, for exmaple, '../foo/file3'
  • a set of modules specified with a wildcards, for exmaple, 'file*'
  • a wildcard indicating all modules in current directory, that is: '*'
  • a list of any of the above, for exmaple, ['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 used. For example, the following Emakefile means that file1 should be compiled with the options [debug_info,{i,"../foo"}], while all other files in the current directory should be compiled with only the debug_info flag.

{'file1',[debug_info,{i,"../foo"}]}.
{'*',[debug_info]}.

See Also

The Compiler Application

Summary

Functions

all()

Equivalent to all([]).

all(Options)

This function determines the set of modules to compile and the compile options to use, by first looking for the emake make option, if not present reads the configuration from a file named Emakefile (see below). If no such file is found, the set of modules to compile defaults to all modules in the current working directory.

files(ModFiles)

Equivalent to files(ModFiles, []).

files(ModFiles, Options)

This function does exactly the same thing as all/0,1, but for the specified ModFiles, which is a list of module or file names.

Functions

all()

-spec all() -> up_to_date | error.

Equivalent to all([]).

all(Options)

-spec all(Options) -> up_to_date | error
             when
                 Options :: [Option],
                 Option :: noexec | load | netload | {emake, Emake} | compile:option(),
                 Emake :: [EmakeElement],
                 EmakeElement :: Modules | {Modules, [compile:option()]},
                 Modules :: atom() | [atom()].

This function determines the set of modules to compile and the compile options to use, by first looking for the emake make option, if not present reads the configuration from a file named Emakefile (see below). 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 options for make and the Erlang compiler. The following make options exist:

  • noexec No execution mode. Just prints the name of each module that needs to be compiled.
  • load Load mode. Loads all recompiled modules.
  • netload Net load mode. Loads all recompiled modules on all known nodes.
  • {emake, Emake} Rather than reading the Emakefile specify configuration explicitly.

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

files(ModFiles)

-spec files(ModFiles) -> up_to_date | error
               when ModFiles :: [(Module :: module()) | (File :: file:filename())].

Equivalent to files(ModFiles, []).

files(ModFiles, Options)

-spec files(ModFiles, Options) -> up_to_date | error
               when
                   ModFiles :: [(Module :: module()) | (File :: file:filename())],
                   Options :: [Option],
                   Option :: noexec | load | netload | compile:option().

This function 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 can 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.