[Scons-users] scons add source file suffix for env.Object()

[Mats Wichmann]

On 11/4/24 06:58, 于 wrote:
> Hi Mats,
> 
> 
> ‍
> 
>     Thanks for your help.
> 
>     I think your solution is better. So that I don't need to create many
>     builders for different suffix.
> 
> 
>     I create a new builder(such as below) to build .850, and
>     "AsmBulder_ex" can build .850 also.
> 
> bld = Builder( action= Action('$ASCOM', '$ASCOMSTR'), \
> suffix='.o', \
> src_suffix='.850')
> 
>         env.Append(BUILDERS={'AsmBulder_ex': bld})
> 
> ‍
> And could you answer me a new question? What are the differences between 
> your solution and new builder.

A new builder is fine, but then you have to call it by name.  If the 
idea is to produce an object file, why not reuse the Object builder, 
which already knows how to deal with multiple types of sources, as 
described in this snippet from the manual page (in the Builder Objects 
section):

  The Builder function accepts the following keyword arguments:

action

     The command used to build the target from the source. action may be 
a string representing a template command line to execute, a list of 
strings representing the command to execute with its arguments (suitable 
for enclosing white space in an argument), a dictionary mapping source 
file name suffixes to any combination of command line strings (if the 
builder should accept multiple source file extensions), a Python 
function, an Action object (see Action Objects) or a list of any of the 
above.

...

Object() has been set up with a mapping as described, dispatching 
different file suffixes to different command line strings, and the 
method I mentioned adds to that mapping.