CMake Error at CMakeLists.txt:32 (generate_export_header): Unknown CMake command "generate_export_header".

[Philippe Nimmegeers]

While trying to compile casADi 2.0.0 (Ubuntu 12.0.4), following error occurs:

CMake Error at CMakeLists.txt:32 (generate_export_header):
  Unknown CMake command "generate_export_header".

Can someone please help or have an idea why this error is occurring?

[Joris Gillis]

Hello Philippe,

Could you give it a try with the patched version (2.0.2) and report back to us?

Best regards,
    Joris Gillis

[Philippe Nimmegeers]

Hello Joris,

I gave it a try, but I still get the same error...
Here is a summary of the steps I've done:

git clone https://github.com/casadi/casadi.git casadi && cd casadi && git checkout 2.0.2

cd casadi
mkdir build
cd build

In the following step the error occurs:

cmake -DWITH_PYTHON=ON ..
-- The C compiler identification is GNU
-- The CXX compiler identification is GNU
-- Check for working C compiler: /usr/bin/gcc
-- Check for working C compiler: /usr/bin/gcc -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++
-- Check for working CXX compiler: /usr/bin/c++ -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done

CMake Error at CMakeLists.txt:32 (generate_export_header):
  Unknown CMake command "generate_export_header".

Call Stack (most recent call first):
  core/CMakeLists.txt:128 (casadi_library)

CMake Warning (dev) in CMakeLists.txt:
  No cmake_minimum_required command is present.  A line of code such as

    cmake_minimum_required(VERSION 2.8)

  should be added at the top of the file.  The version specified may be lower
  if you wish to support older CMake versions for this project.  For more
  information run "cmake --help-policy CMP0000".
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Configuring incomplete, errors occurred!

Kind regards,
Philippe Nimmegeers

[Philippe Nimmegeers]

This problem is solved, thanks to my colleague Mattia. Apparently my build directory was in a wrong casadi directory (casadi/casadi/build, instead of casadi/build). 

Thanks for the help!