[CMake] [cmake-developers] Multi-line strings with indentation ignored

[Brad King]

On 01/18/2017 10:52 AM, Robert Dailey wrote:
> At the moment, with CMake 3.0 and on, I can use this syntax for
> multi-line strings:
> 
> option( ZIOSK_ENABLE_ZPAY_DIAGNOSTICS "\
> Enable additional diagnostic logs for zPay related code. \
> Should not be enabled for production due to the sensitivity \
> and volume of logs that will be printed." )

One can also use bracket arguments:

https://cmake.org/cmake/help/v3.7/manual/cmake-language.7.html#bracket-argument

but they (intentionally) don't process any variable references.
Also they don't ignore indentation.

>     "Enable additional diagnostic logs for zPay related code. "
>     "Should not be enabled for production due to the sensitivity "
>     "and volume of logs that will be printed" )
> 
> it sees each string as a separate parameter.

Correct.

> Is there a mechanism I can use to style my strings this way?

One can do it with an intermediate variable:

```
string(CONCAT mystringvar
  "Enable additional diagnostic logs for zPay related code. "
  "Should not be enabled for production due to the sensitivity "
  "and volume of logs that will be printed"
  )
option(ZIOSK_ENABLE_ZPAY_DIAGNOSTICS "${mystringvar}")
```

> are there any plans to add better multi-line string support?

Not currently.

-Brad