[CMake] Variable target name visible at the top level
Hi All!
I have project with the structure similar to this
worker
| |
| chatterbox
| ||
| |CMakeLists.txt
| |
| externals
| ||
| |sndlib
| | |
| | CMakeLists.txt
| CMakeLists.txt
|
CMakeLists.txt
$ cat worker/CMakeLists.txt
cmake_minimum_required(VERSION 2.6)
add_subdirectory(externals)
add_subdirectory(chatterbox)
If I set sndlib target as a variable
set (snd_lib sndlib)
add_library(${snd_lib} SHARED ...)
variable ${snd_lib} is undefined at the parent scope, i.e. I can't use
${snd_lib} in chatterbox/ CMakeLists.txt
target_link_libraries(chatterbox ${snd_lib}) # ${snd_lib} is empty!
How to handle this situation in a proper way?
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Re: [CMake] Variable target name visible at the top level
2012/10/26 Vyacheslav Karamov ubuntul...@yandex.ru:
Hi All!
I have project with the structure similar to this
worker
| |
| chatterbox
| ||
| |CMakeLists.txt
| |
| externals
| ||
| |sndlib
| | |
| | CMakeLists.txt
| CMakeLists.txt
|
CMakeLists.txt
$ cat worker/CMakeLists.txt
cmake_minimum_required(VERSION 2.6)
add_subdirectory(externals)
add_subdirectory(chatterbox)
If I set sndlib target as a variable
set (snd_lib sndlib)
add_library(${snd_lib} SHARED ...)
variable ${snd_lib} is undefined at the parent scope, i.e. I can't use
${snd_lib} in chatterbox/ CMakeLists.txt
target_link_libraries(chatterbox ${snd_lib}) # ${snd_lib} is empty!
From your description this is strange because 'chatterbox'
is a subdir of 'worker' where snd_lib has been defined so it should be
visible, I guess...
unless you define the snd_lib var AFTER you
add_subdirectory(chatterbox)
since add_subdirectory process subdir first you must define
variable you need before add_subdirectory.
How to handle this situation in a proper way?
Define it at the scope it ought to be ?
or use
set (snd_lib sndlib PARENT_SCOPE)
but again I think your problems comes from the fact
your defined your var after add_subdirectory.
--
Erk
Le gouvernement représentatif n'est pas la démocratie --
http://www.le-message.org
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Re: [CMake] Variable target name visible at the top level
Thank you, but if I need variable two level up?
26.10.2012 12:07, Rolf Eike Beer пишет:
On Fr., 26. Okt. 2012 10:22:51 CEST, Vyacheslav Karamov ubuntul...@yandex.ru
wrote:
Hi All!
I have project with the structure similar to this
set (snd_lib sndlib)
add_library(${snd_lib} SHARED ...)
How to handle this situation in a proper way?
set(... PARENT_SCOPE)
This will propagate the variable one level up.
Eike
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Re: [CMake] Variable target name visible at the top level
2012/10/26 Vyacheslav Karamov ubuntul...@yandex.ru: Thank you, but if I need variable two level up? you may be able to use a GLOBAL property see: cmake --help-command set_property or may be a CACHE variable. but from my point of view, it looks like you have a design issue. Why would you need to jump scope like that? -- Erk Le gouvernement représentatif n'est pas la démocratie -- http://www.le-message.org -- Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake
Re: [CMake] Variable target name visible at the top level
26.10.2012 12:16, Eric Noulard пишет:
2012/10/26 Vyacheslav Karamov ubuntul...@yandex.ru:
Hi All!
I have project with the structure similar to this
worker
| |
| chatterbox
| ||
| |CMakeLists.txt
| |
| externals
| ||
| |sndlib
| | |
| | CMakeLists.txt
| CMakeLists.txt
|
CMakeLists.txt
$ cat worker/CMakeLists.txt
cmake_minimum_required(VERSION 2.6)
add_subdirectory(externals)
add_subdirectory(chatterbox)
If I set sndlib target as a variable
set (snd_lib sndlib)
add_library(${snd_lib} SHARED ...)
variable ${snd_lib} is undefined at the parent scope, i.e. I can't use
${snd_lib} in chatterbox/ CMakeLists.txt
target_link_libraries(chatterbox ${snd_lib}) # ${snd_lib} is empty!
From your description this is strange because 'chatterbox'
is a subdir of 'worker' where snd_lib has been defined so it should be
visible, I guess...
unless you define the snd_lib var AFTER you
add_subdirectory(chatterbox)
since add_subdirectory process subdir first you must define
variable you need before add_subdirectory.
I have added externals before chatterbox, so
${snd_lib} should be defined in chatterbox.
How to handle this situation in a proper way?
Define it at the scope it ought to be ?
or use
set (snd_lib sndlib PARENT_SCOPE)
but again I think your problems comes from the fact
your defined your var after add_subdirectory.
PARENT_SCOPE variable is visible only in a parent scope, not in a
current one. But I need it in current scope, parent scope and scope
above parent.
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Re: [CMake] Variable target name visible at the top level
2012/10/26 Vyacheslav Karamov ubuntul...@yandex.ru: How to handle this situation in a proper way? Define it at the scope it ought to be ? or use set (snd_lib sndlib PARENT_SCOPE) but again I think your problems comes from the fact your defined your var after add_subdirectory. PARENT_SCOPE variable is visible only in a parent scope, not in a current one. But I need it in current scope, parent scope and scope above parent. Then I guess you should try to use a global property or cached var. Some example attached. As you'll see both mechanism may achieve what you with varying bevahior. If you want to learn the differences: cmake --help-command get_property cmake --help-command set_property cmake --help-command set -- Erk Le gouvernement représentatif n'est pas la démocratie -- http://www.le-message.org multi-scope-var-or-props.tgz Description: GNU Zip compressed data -- Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake
