failure on cmake 2.8.11

[mlubin]

cmake 2.8.11 is the latest version for which I could find a PPA which runs on travis. I get the following error trying to compile mp:

-- Build type: Release
-- Performing Test HAVE_STD_CPP11_FLAG
-- Performing Test HAVE_STD_CPP11_FLAG - Failed
-- Performing Test HAVE_STD_CPP0X_FLAG
-- Performing Test HAVE_STD_CPP0X_FLAG - Success
CMake Error at CMakeLists.txt:209 (target_compile_definitions):
  target_compile_definitions called with incorrect number of arguments
Call Stack (most recent call first):
  CMakeLists.txt:243 (add_mp_library)

https://travis-ci.org/dpo/ampl.jl/jobs/61819188#L217
JuliaSmoothOptimizers/AmplNLReader.jl#7

[vitaut]

Thanks for the bug report. The minimum supported CMake version right now is 2.8.12 (I think I need to update cmake_minimum_required) because of target_compile_options. So I recommend using a recent version of CMake from here instead of using a PPA.

[mlubin]

Okay, I got things working by just downloading the linux binary from the cmake page. You may want to bump the minimum version in CMakeLists.txt though.

[vitaut]

Great. Bumped the CMake version in 466a645.