xc/config/cf/cygwin.rules - ComplexProgramTarget_1

[Suhaib Siddiqi]

> -----Original Message-----
> From: Harold Hunt [ mailto:huntharo@msu.edu ] 
> Sent: Wednesday, August 15, 2001 9:58 PM
> To: cygx
> Subject: xc/config/cf/cygwin.rules - ComplexProgramTarget_1
> 
> 
> ComplexProgramTarget_1 is supposed to generate an all:: 
> dependency for each program being built from 
> ComplexProgramTarget_1 through ComplexProgramTarget_10 
> (actually, the current Cygwin rules only do 1 through 3).  
> Currently, ComplexProgramTarget_1 does this with:
> AllTarget($(PROGRAM1) $(PROGRAM2) $(PROGRAM3))
> 
> PROGRAM2 and PROGRAM3 are defined by ComplexProgramTarget_2 
> and _3 as ProgramTargetName(program), which appends .exe to 
> the program target name. However, PROGRAM2 and PROGRAM3 are 
> not defined until the ComplexProgramTarget_2 and _3 rules are 
> processed; 

I do not understand.... what do you mean by PROGRAM2 and PROGRAM3 are not
defined?

>the end effect is that program 2 and program 3 are 
> not built until the 'install' phase of make, rather than 
> during the 'World' phase, as on all other platforms.
> 
> I'd like to fix the ComplexProgramTarget rules, if for no 
> other reason than to learn a little about Imake and awk.  The 
> approach I see to fixing the problem goes like this:
> 
> 1) Break up the PROGRAMS variable (e.g. 'xclipboard, xcutsel')
> 2) Append .exe to each program name in the PROGRAMS variable
> 	(e.g. 'xclipboard.exe xcutsel.exe')
> 3) Store the doctored program names in a PROGRAMS_EXE variable
> 4) Change the all:: dependency to AllTarget($(PROGRAMS_EXE))
> 
> 
> I can do steps 1, 2, and 4, but I do not know how to get the 
> output of awk back into an Imake variable.  Here's the 
> command I've got in ComplexProgramTarget_1 to output the 
> doctored PROGRAM data to the console during the build:
> 
> all:: @@\
> 	echo $(PROGRAMS) | awk '{i = 1; while ($$i != "") 
> {printf ("%s.exe ", $$i);
> ++i;}}' @@\
> 
> 
> I'm stuck at that point.  I'm open to an entirely different 
> approach, but I'd also like to know how to get the output of 
> that command into an Imake variable, for future reference.


You cannot do that. Imake is a wrapper to cpp and you cannot shell out of
cpp.


Suhaib

> 
> Thanks for any help,
> 
> Harold
>