On Friday, October 28, 2016 1:22:20 PM CEST Harald van Dijk wrote: > On 28/10/16 12:54, Tim Ruehsen wrote: > > Hi, > > > > maybe you can enlighten me :-) > > > > I try to use dash (0.5.8-2.3) on Debian unstable for executing ./configure > > scripts. Since Debian builds with --disable-lineno, all ./configure > > scripts > > silently fall back to bash (I created bug report #842242 to get this > > fixed). > As you found there, this is intentional, specifically to force configure > scripts to continue to be run with bash, which is what happened with > older dash versions. I asked at the time why they don't just call bash > explicitly (bash configure instead of ./configure) if that's the goal, > but didn't get a response. > > > Next I rebuilt the package from the (Debian) sources without > > --disable-lineno and installed it. Now I see error messages from dash > > when it comes to the do nothing operator :. > > > > $ dash -c 'test -n "a" && :' > > dash: 1: :: not found > > $ echo $? > > 127 > > > > $ bash -c 'test -n "a" && :' > > $ echo $? > > 0 > > > > Since this : construct is wildly used and I know that dash on other > > systems > > work with it, I wonder what is wrong here. > > > > Is there a known bug, maybe fixed on recent dash versions ? > > Or has this some simple reason my stupidity doesn't see ? > > This is likely to happen if you have the LC_ALL environment variable set > when building dash, and I can reproduce your results with 0.5.8 by > setting LC_ALL to en_GB.UTF-8. It was fixed in 0.5.9. (Specifically, > where a fixed sort order was needed, 0.5.8 only forced LC_COLLATE=C, but > that still allowed LC_ALL to override it.) Harald !!! That's it ! I wish you could see me grinning from ear to ear ! > dash won't be the only program that has problems with this; if you're > building software yourself, setting LANG should generally be okay, but > LC_ALL is best avoided. Unless you're doing it specifically to find and > report/fix bugs, anyway. In fact, I use LC_ALL to find bugs. Especially turkish and greek have some nifty casing pitfalls ;-) Thank you so much, Harald ! Tim
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