On 13/02/12 6:47 PM, Eric Noulard wrote:
2012/2/13 Nicholas Yue<[email protected]>:
Hi,
There is an existing project I have access to that already have CMake
configuration file but the way it is written requires alot of preprocessing
steps (python, shell etc) before it is usable.
I wanted to investigate a cleaner (truer to CMake original design
purpose) usage of CMake,
So, I have an original-project directory which contains both the source
and the CMakeLists.txt in a nested directory structure.
I want to create my own CMake hierarchy (structure the same way) but
reference the source code in the original-project directory location.
How do I tell CMake to refer to source code at some other top level
directory as a starting point.
Is there such a concept in CMake ?
I am not sure to fully understand you request but in a CMakeLists.txt
you can perfectly
refer to source located outside the directory the CMakeLists.txt is in,
you can use either relative or absolute path and do something like:
add_executable(NiceTarget ../../relpath/to/source.c
${CMAKE_SOURCE_DIR}/abspath/to/another.c)
Yes, I know I can do that. I am hoping to avoid maintaining a hierarchy
of such modification.
There are 42 CMakeLists.txt files each with multiple libraries, test and
such.
I was hoping there is a way to (assuming I maintain the same hierarchy)
tell CMake to start looking for source from some other top level
directory 'once' and it will be able to find the source in the 'other'
location that is different to my 'cleaned-up' version of CMakeLists.txt
Regards
this is usually a bad idea but this should work.
Now that said if you do that for compatibility purpose in order to
maintain the legacy build
before doing the switch to "genuine" CMake build then may be using a
VCS like git would
be a better way to go.
I have this as a fall back.
Best regards
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