Hi,
I concocted a contrived example where the presence of a prerequisite alters
the execution of GNU Make depending on its presence. I also use second
expansion. This is the makefile:
.SECONDEXPANSION:
file_x := f.q
build_x := touch
%.tcl: $(interference) $$(file_$$*)
$(build_$*) \
$@
%.q: %.tcl
touch $@
To run, first touch a few files so they exist:
$ touch f.q file.txt
Next, run make (this works):
$ make x.tcl
touch \
x.tcl
Ok, clean up:
$ rm x.tcl
Now interfere with the process:
$ make x.tcl interference=file.txt
make x.tcl
\
f.tcl
make: f.tcl: Command not found
make: *** [f.tcl] Error 127
This problem feels familiar. Can someone explain this behaviour?
Thanks,
Martin
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