Use a variable as the list of arguments to a function

Question

I want to pass a variable's value to a function as if I had directly written it. Here is what I have tried:

cmake_minimum_required (VERSION 3.5.1)
project(test)

message(WARNING "This is a warning")
# CMake Warning at CMakeLists.txt:4 (message):
#   This is a warning

set(variable "WARNING \"This is a warning\"")
message(${variable})
# WARNING "This is a warning"

Unfortunately, you can see that the second call to message doesn't behave like the first one. How to achieve this purpose?

Why not just make the warning message itself a variable and then print out with message(WARNING ${message_var})? — Developer Paul
– Developer Paul, Commented Mar 23, 2018 at 12:38
@DeveloperPaul Because this was just a minimal example for something more complex that I was trying to achieve. — Codoscope
– Codoscope, Commented Mar 23, 2018 at 18:21

Tsyvarev · Accepted Answer · 2018-03-22 21:30:00Z

1

Simply assign a list to the variable:

set(variable WARNING "This is a warning")

Alternatively, as elements in a list are actually separated with a semicolon:

set(variable "WARNING;This is a warning")

answered Mar 22, 2018 at 21:30

Tsyvarev

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