Am Montag, 15. Oktober 2012 um 15:51:39, schrieb David Cole <[email protected]> > Consider an alternate approach: > > Write a header file named "xx.define.h" and include it ONLY in x.cpp. > > #define XX "seomthing" > > Then you don't even have to re-run CMake to change the definition of > XX. Just edit the header file and re-compile. > > Especially when you realize you've misspelled something. > > > :-) >
Thanks, did something similar. Since the define-value is created dynamically
I used configure_file(...) to create the include.
Kornel
> On Mon, Oct 15, 2012 at 3:47 PM, Kornel Benko <[email protected]> wrote:
> > Am Montag, 15. Oktober 2012 um 15:40:18, schrieb Brad King
> > <[email protected]>
> >
> >> On 10/15/2012 03:26 PM, Kornel Benko wrote:
> >
> >> > Unfortunately, if "something" changes, the effect is, that _all_ sources
> >> > in the relevant
> >
> >> > directory are recompiled. (I expected the recompilation of x.cpp only).
> >
> >> >
> >
> >> > This may depend on the build system. In my case "Unix makefiles". The
> >> > reason is
> >
> >> >
> >
> >> > that each object file created for this directory depends on
> >> > "flags.make", which changes accordingly.
> >
> >> >
> >
> >> > If one has hundreds of files in the source dir, this is less welcome.
> >
> >>
> >
> >> This is a known limitation of the Makefile generator. We cannot use
> >
> >> a per-object flags.make file because some filesystems are EXTREMELY
> >
> >> slow at using lots of tiny files. There may be an issue tracker
> >
> >> entry asking for this to be solved, but I don't think it ever will
> >
> >> be.
> >
> >>
> >
> >> -Brad
> >
> >
> >
> > Thanks Brad. I nearly expected/feared something like this. Pity.
> >
> >
> >
> > Kornel
> >
> >
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