[CMake] How to not evaluate variable names ?

[fred.antares at free.fr]

The problem is I'm working on quite a big project, and it was not written
initially by me. I don't know about the "FILE(WRITE", but here's what I'm doing:
- In the CMakelists, I'm calling a macro with one of the parameters being what I
want in my attribute (in that case "${do_not_evaluate}").
- This macro adds the attribute to a specific source group
- The source group is parsed and interpreted by custom code that was added to
CMake for our own generation needs
- The arg ends up being added to a Tiny XML element
- The XML file write is done from the custom code, by calling Write on the Tiny
XML hierarchy

The CMake version is 2.4.8, but customized with our own generators.

Maybe the simpler thing, given the case and the lack of a direct solution, would
be to add a specific string to the attribute, signaling to the code that it
should be replaced ?

Fred

Quoting David Cole <david.cole at kitware.com>:

> Are you using "FILE(WRITE"...?
> What version of CMake?
>
> This should work. Send the CMake code snippet you are using to try to do
> this so that we can see what might be wrong.
>
> If using older CMake (2.4.something) then you may have to do:
>   set(DOLLAR "$")
>   file(WRITE blah "${DOLLAR}{varNameHere}")
>
> ...but escaping the "$" inside a string literal has worked for quite some
> time now... I'd like to know if you have a different use case or are just
> seeing older-versioned CMake behavior.
>
>
>
> On Wed, Sep 30, 2009 at 3:54 AM, <fred.antares at free.fr> wrote:
>
> > Quoting Marcel Loose <loose at astron.nl>:
> >
> > > On Wed, 2009-09-30 at 09:28 +0200, fred.antares at free.fr wrote:
> > > > Quoting Jeroen Dierckx <jeroen.dierckx at gmail.com>:
> > > >
> > > > > On Wed, Sep 30, 2009 at 8:32 AM, <fred.antares at free.fr> wrote:
> > > > >
> > > > > > Hi,
> > > > > >
> > > > > > I've seen a previous discussion on this subject, but unfortunately,
> > > none of
> > > > > > the
> > > > > > given solutions (as described on
> > > > > > http://www.cmake.org/Wiki/CMake:VariablesListsStrings) seem to
> > work in
> > > my
> > > > > > case.
> > > > > >
> > > > > > I'm using CMake to generate an XML config file, and one of the tags
> > > must
> > > > > > have an
> > > > > > argument as follows: args="${serverConfigChanged}". The XML is used
> > by
> > > > > > CruiseControl, and unfortunately, it uses the same variable syntax
> > as
> > > > > > CMake. I
> > > > > > tried almost every combination of escaping, double dollars, but
> > > couldn't
> > > > > > get the
> > > > > > correct output.
> > > > > >
> > > > > > Is there some way to achieve that directly from the CMakeList.txt,
> > or
> > > > > > should I
> > > > > > do that in the generator code ?
> > > > > >
> > >
> > > Hi Jeroen,
> > >
> > > What about:
> > >
> > > file(WRITE /tmp/dummy.xml "args=\"\${serverConfigChanged}\"\n")
> > >
> > > That works for me. You must escape the double quotes (") and the dollar
> > > sign ($).
> > >
> > > Best regards,
> > > Marcel Loose.
> > >
> > >
> >
> > Unfortunately, it doesn't work. I already tried escaping the dollar sign
> > and the
> > result in that case is args="".
> >
> > Fred
> >
> >
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