[CMake] Need help generating a config file

[Eric Noulard]

2016-10-13 21:18 GMT+02:00 Aaron Boxer <boxerab at gmail.com>:

> Hello,
>
> I have a     foo.h.cmake.in     file that I am using to generate a
> foo_config.h    file.
>
> Here is the line in my cmake file that generates the header:
>
> configure_file(${CMAKE_CURRENT_SOURCE_DIR}/foo.h.cmake.in
>   ${CMAKE_CURRENT_BINARY_DIR}/foo_config.h @ONLY)
>


You specified @ONLY option which means that only @VARNAME@ will be processed
and not ${VARNAME}


>
>
> I would like to define or undefine DEFINE in the config file
> based on some cmake variables.
>
>
> Here is my line in the foo.h.cmake.in file:
>
> #cmakedefine FOO_DEFINE ${SOME_CMAKE_VARIABLE}
>

Either you drop the @ONLY option of configure_file or you write

#cmakedefine FOO_DEFINE @SOME_CMAKE_VARIABLE@

and you should get what you want.
@ONLY is very useful when you configure some kind of shell script template
where $ shoudn't be interpreted by CMake condigure_file because it's meant
to kept
as is in the resulting configured file.



>
> However, I only get
>
> #define FOO_DEFINE ${SOME_CMAKE_VARIABLE}
>
> in the foo_config.h file.
>
>
> Thanks,
> Aaron
>
>
>
>
>
>
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-- 
Eric
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