Some libraries (e.g. lemon) only compile if the MACOSX_DEPLOYMENT_TARGET is set to the correct version. The value of 10.5 in the master branch is good up to OSX 10.8, but for 10.9 we need to set it to 10.9 as well.
Attention: checking for OS=Darwin and compiler=clang is not enough, as people who install the newest XCode on 10.8 also have clang (and even the 10.9 SDK!) installed.
https://github.com/chaubold/buildem/blob/fix/OSX10.9/BuildSupport.cmake#L60
Some libraries (e.g. lemon) only compile if the
MACOSX_DEPLOYMENT_TARGETis set to the correct version. The value of10.5in the master branch is good up to OSX 10.8, but for 10.9 we need to set it to10.9as well.Attention: checking for
OS=Darwin and compiler=clangis not enough, as people who install the newest XCode on 10.8 also have clang (and even the 10.9 SDK!) installed.https://github.com/chaubold/buildem/blob/fix/OSX10.9/BuildSupport.cmake#L60