Version mismatch between Python interpreter (1.4) and libraries (3.7.3)

[lvannoli]

ROOT Version: [Release 6.18/04 - 2019-09-11]
Platform:
Compiler:

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Hello everybody.
I installed root on my macbook air just 3 hours ago. After the building and the installing fase, I’ve tried to build pyroot with my anaconda python.
I used the following command in root build folder:

cmake ../root-source/ -DPYTHON_EXECUTABLE=./Users/leonardo/anaconda3/bin/python

where “root-source” is the source folder with the CMakeLists.txt (and other CMake stuff).
The system returns me the following error message:

-- ROOT default compression algorithm: zlib

-- Found a Mac OS X System 10.15

-- Found a 64bit system

-- Found LLVM compiler collection

-- ROOT Platform: macosx

-- ROOT Architecture: macosx64

-- Build Type: RelWithDebInfo

-- Compiler Flags: -std=c++11 -Wc++11-narrowing -Wsign-compare -Wsometimes-uninitialized -Wconditional-uninitialized -Wheader-guard -Warray-bounds -Wcomment -Wtautological-compare -Wstrncat-size -Wloop-analysis -Wbool-conversion -m64 -pipe -W -Wall -Woverloaded-virtual -fsigned-char -fno-common -Qunused-arguments -pthread -stdlib=libc++

-- Looking for ZLib

-- Building freetype version 2.6.1 included in ROOT itself

-- Looking for LZMA

-- Found LZMA includes at /usr/local/include

-- Found LZMA library at /usr/local/lib/liblzma.dylib

-- Could NOT find GIF (missing: GIF_LIBRARY GIF_INCLUDE_DIR)

-- Could NOT find TIFF (missing: TIFF_LIBRARY TIFF_INCLUDE_DIR)

-- Could NOT find PNG (missing: PNG_LIBRARY PNG_PNG_INCLUDE_DIR)

-- Could NOT find JPEG (missing: JPEG_LIBRARY JPEG_INCLUDE_DIR)

-- Building AfterImage library included in ROOT itself

-- Looking for python

-- Found PythonInterp: /Applications/root/root-build/Users/leonardo/anaconda3/bin/python3 (found version "1.4")

CMake Error at cmake/modules/SearchInstalledSoftware.cmake:444 (message):

Version mismatch between Python interpreter (1.4) and libraries (3.7.3).

ROOT cannot work with this configuration. Please specify only

PYTHON_EXECUTABLE to CMake with an absolute path to ensure matching

versions are found.

Call Stack (most recent call first):

CMakeLists.txt:159 (include)

-- Configuring incomplete, errors occurred!

See also "/Applications/root/root-build/CMakeFiles/CMakeOutput.log".

See also "/Applications/root/root-build/CMakeFiles/CMakeError.log".

thanks to everybody!

[etejedor]

Hi,
It is weird that ROOT is finding 1.4 as Python version, can you specify all these CMake variables when building (not only PYTHON_EXECUTABLE)?

Python	PYTHON_EXECUTABLE	PATH	Python interpreter executable
	PYTHON_INCLUDE_DIR	PATH	Directory where to find Python.h
	PYTHON_LIBRARY	PATH	Full path to Python library

On the other hand, building ROOT with Anaconda can cause troubles, since you need to make sure you compile ROOT with the Anaconda-shipped compiler.