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From: Jacob Sparre Andersen <sparre@nbi.dk>
Newsgroups: comp.lang.ada
Subject: Re: Implementing an Ada compiler and libraries.
Date: Thu, 10 May 2007 21:57:37 +0200
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Date: 2007-05-10T21:57:37+02:00
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Stefan Bellon <sbellon@sbellon.de> writes:
> Ludovic Brenta wrote:
>> Stefan Bellon writes:

>> > But timestamps are considered as well. If you touch a file
>> > without modifying it otherwise, it triggers a recompilation.
>> 
>> Not in my experience.  Changing the timestamp causes a
>> recalculation of the checksum, that's all.  Even after adding
>> whitespace or pretty-printing the file, there is no recompilation.
>
> Hmmmm:
>
> bellonsn@cube$ gnatmake foo.adb
> gnatmake: "foo" up to date.
> bellonsn@cube$ touch foo.adb    
> bellonsn@cube$ gnatmake foo.adb
> gcc -c foo.adb
> gnatbind -x foo.ali
> gnatlink foo.ali

I suspect that the difference in your experience is that Ludovic keeps
the "-m" flag among his default flags for "gnatmake".

Try:

   gnatmake -m foo.adb
   touch       foo.adb
   gnatmake -m foo.adb

Greetings,

Jacob
-- 
"There are two ways of constructing a software design. One way is to
 make it so simple that there are obviously no deficiencies. And the
 other way is to make it so complicated that there are no obvious
 deficiencies."                                    -- C. A. R. Hoare