Re: [Automake-NG] [FYI] [ng] vars: names of iterating vars in $(foreach) loops shorter & simpler

[Akim Demaille]

Le 24 juil. 2012 à 18:48, Stefano Lattarini a écrit :

>>> The first two arguments, VAR and LIST, are expanded before anything
>>> else is done; note that the last argument, TEXT, is *not* expanded at
>>> the same time.
>> 
>> So, indeed, in the following example, every use of the
>> outer $(v) is resolved even before the first temporary
>> $(v) is defined.  So my point is moot.
>> 
> So we agree in the end?

That the idiom is safe, yes.

>> $ cat Makefile
>> v = $(info "v")root
>> list = $(v)/1 $(v)/2
>> all:
>>      echo $(foreach v,$(list),{$(info "body")$(v)})
>> $ make
>> "v"
>> "v"
>> "body"
>> "body"
>> echo {root/1} {root/2}
>> {root/1} {root/2}
>> 
> Nice :-)
> 
> Would you fancy adding the above to the 't/spy-foreach.sh' test?

I started to, but there are issues with building automake-ng:

+ gmake -rR V=1
rm -f t/ax/test-defs.sh t/ax/test-defs.sh-t
sed -e 's,@datadir@,/opt/gostai/share,g' -e 
's,@amdir@,/opt/gostai/share/automake-ng-1.12a/am,g' -e 
's,@bindir@,/opt/gostai/bin,g' -e 
's,@docdir@,/opt/gostai/share/doc/automake-ng,g' -e 
's,@pkgvdatadir@,/opt/gostai/share/automake-ng-1.12a,g' -e 
's,@scriptdir@,/opt/gostai/share/automake-ng-1.12a,g' -e 
's,@automake_acdir@,/opt/gostai/share/aclocal-1.12a,g' -e 
's,@system_acdir@,/opt/gostai/share/aclocal,g' -e "s,address@hidden@,Generated 
from test-defs.in do not edit by hand.,g" <"../../t/ax/test-defs.in" | /bin/sh 
./config.status --file=- >"t/ax/test-defs.sh-t"
/bin/sh: t/ax/test-defs.sh-t: No such file or directory
gmake: *** [t/ax/test-defs.sh] Error 1
Compilation FAILED: /Users/akim/src/gnu/automake-ng: build-for-darwin V=1 exit 2

I don't have any t/ax in my builddir.

Attached, a patch.  Tweak as much as you want.

0001-tests-check-the-behavior-of-GNU-Make-s-foreach.patch
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