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Top Forums Shell Programming and Scripting Question in creating targets in makefile Post 302843986 by bakunin on Friday 16th of August 2013 03:49:29 AM
Old 08-16-2013
You need a generalized rule for how to get from a "source" file to an "object" file. If your source files carry the extension ".src" and your objects the extension ".obj" this would be:

Code:
.src.obj
               <actions here>

Now you only need a special variable which contains only the file name which triggered the rule to use in the action part - and fortunately there is such a thing: "$<". A possible rule would look like:

Code:
COMPILE=/path/to/compiler
FLAGS=-a -b -c
.src.obj
               $(COMPILE) $(FLAGS) $<

If the rule is triggered by the file "foo.src" the command executed would be:

Code:
/path/to/compiler -a -b -c foo.src

You might want to read the man page of the make-utility to learn more about the various special variables you can use. For instance, there is also a variable for the file name that will be the target of the rule: "$@".

C compilers per default write a file "a.out" instead of naming the object like the source file only with the extension replaced by ".obj". You would have to explicitly tell the compiler which name it should use for its output file with the "-o" option if you do not want this default behavior. This is what "$@" is for:

Code:
COMPILE=/path/to/compiler
FLAGS=-a -b -c
.src.obj
               $(COMPILE) $(FLAGS) $< -o $@

I am sure you will be able to adapt this to your needs with careful study of the man page.

I hope this helps.

bakunin
This User Gave Thanks to bakunin For This Post:
 

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Dpkg::Interface::Storable(3)					   libdpkg-perl 				      Dpkg::Interface::Storable(3)

NAME
Dpkg::Interface::Storable - common methods related to object serialization DESCRIPTION
Dpkg::Interface::Storable is only meant to be used as parent class for other objects. It provides common methods that are all implemented on top of two basic methods parse() and output(). BASE METHODS
Those methods must be provided by the object that wish to inherit from Dpkg::Interface::Storable so that the methods provided can work. $obj->parse($fh, $desc) This methods initialize the object with the data stored in the filehandle. $desc is optional and is a textual description of the filehandle used in error messages. $string = $obj->output($fh) This method returns a string representation of the object in $string and it writes the same string to $fh (if it's defined). PROVIDED METHODS
$obj->load($filename) Initialize the object with the data stored in the file. The file can be compressed, it will be uncompressed on the fly by using a Dpkg::Compression::FileHandle object. If $filename is "-", then the standard input is read (no compression is allowed in that case). $obj->save($filename) Store the object in the file. If the filename ends with a known compression extension, it will be compressed on the fly by using a Dpkg::Compression::FileHandle object. If $filename is "-", then the standard output is used (data are written uncompressed in that case). "$obj" Return a string representation of the object. AUTHOR
Raphael Hertzog <hertzog@debian.org>. 1.16.15 2014-06-05 Dpkg::Interface::Storable(3)
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