fix syntax in CMakeLists

6 jobs for CMakeTarget in 8 minutes and 20 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #70769
Qt551 VS2013
CoMISo-VS2013-Qt-5.5.1-x64

00:01:05

passed #70770
IPOPT3129 VS2017
CoMISo-VS2017-Qt-5.10.1-x64

00:01:16

passed #70767
Linux
clang-c++11

00:06:56

passed #70766
Linux
gcc-c++11

00:03:20

passed #70768
Apple
macos-c++11

00:04:46

 
  Deploy
passed #70771
trigger_build

00:00:17