cmake doesn't recognize CMAKE_ECLIPSE_VERSION setting

Question

I'm trying to generate an eclipse .project and .cproject from an existing cmake file. Running cmake from the project root I tried adding to the root CMakeLists.txt set(CMAKE_ECLIPSE_VERSION=4.2) which apparently might do nothing as it is a local variable, not the global env variable, if i understand correctly.

Trying to add the flag to the commandline like this:

cmake -G"Eclipse CDT4 - Unix Makefiles" -DCMAKE_ECLIPSE_VERSION=4.2 .

Produces the following warning. So how does one let cmake know the eclipse version?

-- Could not determine Eclipse version, assuming at least 3.6 (Helios). Adjust CMAKE_ECLIPSE_VERSION if this is wrong.

I checked the .project file and it seems to be using cdt 4. Pretty old.

kesten

Answer 1

I had the same problem and after looking at CMake's code I noticed that the actual variable used to get the Eclipse's version is named _ECLIPSE_VERSION (starting with underscore) and not CMAKE_ECLIPSE_VERSION. Here's what the code looks like:

cmake -G"Eclipse CDT4 - Unix Makefiles" -D_ECLIPSE_VERSION=4.2 .

That worked for me!

EDIT: Older versions of CMake don't recognise Eclipse 4.2 (which uses CDT 8.1) but does recognize 3.7 (which uses CDT 8.0). I used -D_ECLIPSE_VERSION=3.7 and Juno picked up well the project configuration (previously I had unresolved inclusions due to incompatibility of the CDT4 files generated by default). As pointed out by m3tikn0b, newer versions of CMake do recognize until Eclipse Kepler 4.3.