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cmake: add custom error messsage about Python 3

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This should be helpful as developers need to migrate to Python 3.
This commit is contained in:
Julian Oes 2020-01-15 15:03:18 +01:00
parent c77816aef2
commit 75c8fb12e4
1 changed files with 7 additions and 1 deletions
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8
CMakeLists.txt
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@ -267,7 +267,13 @@ endif()
# If using catkin, Python 2 is found since it points # If using catkin, Python 2 is found since it points
# to the Python libs installed with the ROS distro # to the Python libs installed with the ROS distro
if (NOT CATKIN_DEVEL_PREFIX) if (NOT CATKIN_DEVEL_PREFIX)
find_package(PythonInterp 3 REQUIRED) find_package(PythonInterp 3)
# We have a custom error message to tell users how to install python3.
if (NOT PYTHONINTERP_FOUND)
message(FATAL_ERROR "Python 3 not found. Please install Python 3:\n"
" Ubuntu: sudo apt install python3 python3-devel python3-pip\n"
" macOS: brew install python")
endif()
else() else()
find_package(PythonInterp REQUIRED) find_package(PythonInterp REQUIRED)
endif() endif()