On 04-Sep-14 20:40, Hendrik Sattler wrote:
On 4. September 2014 16:38:21 MESZ, Ruslan Baratov via CMake <[email protected]>
wrote:
On 04-Sep-14 18:09, Anders Lindgren wrote:
make sure that the argument don't form a valid variable name.
It's not possible
set(a b)
set(b c)
if(">${a}<" STREQUAL ">b<" OR ">${a}<" STREQUAL ">c<")
message("true")
endif()
How about that:
set(a "") # variable `a` is empty
set("><" ">b<")
if(">${a}<" STREQUAL ">b<")
message("Value of variable with name `a` is `b`!")
endif()
I really do not understand this argument.
Do you have so little control over your build tool (and that's what CMake is)?
Nobody makes variables like this. Maybe to break the build script on purpose.
And then, it breaks, so what?
HS
The solution ">...<" not changing the reason of the problem - ambiguity.
It's just making things more obscure. My example prove that statement
"make sure that the argument don't form a valid variable name" by
creating string ">...<" is wrong. Here is example of how "strange" names
can appear:
# User's code
macro(set_version package component version)
set("${package}-${CMAKE_DEBUG_POSTFIX}_${component}" "${version}")
endmacro()
set(CMAKE_DEBUG_POSTFIX d)
if(Somepackage_FOUND)
set(pack_name "Somepackage")
set(pack_component "Somecomp")
set(pack_version "1.2.3")
else()
set(pack_name "")
set(pack_component "")
set(pack_version "")
endif()
set_version("${pack_name}" "${component}" "${version}")
find_package(...) # User call my code here
If package not found the variable "-d_" is defined and empty. Some user
choose "-" and "_", the other choose ">" and "<". I don't want to
blame/teach *users* for creating such names. The important thing is that
it will not ruin my code.
Cheers, Ruslo
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