Fix error on doxydoc generation for pyfaust on Windows and macOS.

The bug was related to charset problem and the need to use preferably python3.
Issue #80 related.

.gitlab-ci.yml

@@ -62,7 +62,7 @@ package_macos:
         - SHA_START=$(echo $CI_COMMIT_SHA | sed -e 's/^\(.\{8\}\).*/\1/')
         - if [[ ! -d 'build' ]]; then  mkdir build;fi; cd build
         - 'cmake -DBUILD_WRAPPER_PYTHON=ON -DBUILD_WRAPPER_MATLAB=ON -DBUILD_DOCUMENTATION=ON -DCPACK_PACKAGE_VERSION=$SHA_START -DCMAKE_INSTALL_PREFIX=/opt/local/faust-$SHA_START -DBUILD_TESTING=OFF ..'
-        - make
+        - make LANG=en_GB.UTF-8
         - 'echo $MACOS_PASS | sudo -S make install'
           #- 'echo $MACOS_PASS | sudo -S hdiutil create -volname Faust-$SHA_START-MatlabR2016a-Py2.7 -srcfolder /opt/local/faust-$SHA_START -ov -format UDRW faust-$SHA_START'
         - pkgbuild --identifier fr.inria.faust --version $SHA_START --root /opt/local/faust-$SHA_START --install-location /opt/local/faust-$SHA_START --scripts . ./faust-$SHA_START.pkg
@@ -126,14 +126,14 @@ package_linux:
         - schedules
         - tags
 
-# jobs triggered by git tag can force cpack to use the tag name as version but it's not necessary for MacOSX (not using cpack for that sys.)
-# it's done for linux packages
+          # jobs triggered by git tag can force cpack to use the tag name as version but it's not necessary for MacOSX (not using cpack for that sys.)
+          #it's done for linux packages
 
 package_macos_release:
     script:
         - if [[ ! -d 'build' ]]; then  mkdir build;fi; cd build
         - 'cmake -DBUILD_WRAPPER_PYTHON=ON -DBUILD_WRAPPER_MATLAB=ON -DBUILD_DOCUMENTATION=ON -DCMAKE_INSTALL_PREFIX=/opt/local/faust -DCPACK_PACKAGE_VERSION=$CI_COMMIT_TAG -DCMAKE_BUILD_TYPE=Release -DEXCLUDE_FAUST_LIB_INSTALL=ON -DBUILD_TESTING=OFF ..'
-        - make
+        - make LANG=en_GB.UTF-8
         - 'echo $MACOS_PASS | sudo -S make install'
         - 'echo $MACOS_PASS | sudo -S hdiutil create -volname Faust-$CI_COMMIT_TAG-MatlabR2016a-Py2.7 -srcfolder /opt/local/faust -ov -format UDRW faust-$CI_COMMIT_TAG'
         - pkgbuild --identifier fr.inria.faust --version $CI_COMMIT_TAG --root /opt/local/faust --install-location /opt/local/faust --scripts . ./faust-$CI_COMMIT_TAG.pkg

CMake/findPython.cmake

@@ -183,4 +183,17 @@ foreach(PYTHON_EXE IN LISTS PYTHON_EXES)
 	message(STATUS "CYTHON_BIN_DIR has been found : ${CYTHON_BIN_DIR}")
 	message(STATUS "------------------------------------------------")
 	list(APPEND CYTHON_EXES ${CYTHON_BIN_DIR})
+
+    # store python path in variable PYTHON2_EXE or PYTHON3_EXE according to
+    # its version (overridding previous iteration versions)
+    exec_program("${PYTHON_EXE}" ARGS "--version" OUTPUT_VARIABLE PY_VER RETURN_VALUE PY_RES)
+    #message(STATUS "PY_VER=${PY_VER}")
+    string(REGEX REPLACE "Python ([0-9]\\.[0-9]).*$" "\\1" PY_VER_WITH_POINTS ${PY_VER})
+    string(REGEX REPLACE "Python ([0-9])\\.([0-9]).*$" "\\1\\2" PY_VER ${PY_VER})
+    if(PY_VER MATCHES 3)
+        set(PYTHON3_EXE ${PYTHON_EXE})
+    else()
+        set(PYTHON2_EXE ${PYTHON_EXE})
+    endif()
+
 endforeach()

gen_doc/py_filter.bat.in

-@PYTHON_EXECUTABLE@ -m doxypypy.doxypypy -a -c %1 %2 |  @PYTHON_EXECUTABLE@ py_filterout_namespace.py pyfaust.__init__. pyfaust.factparams. pyfaust.demo.
+@PYTHON3_EXE@ -m doxypypy.doxypypy -a -c %1 %2 %3 |  @PYTHON3_EXE@ py_filterout_namespace.py pyfaust.__init__. pyfaust.factparams. pyfaust.demo.
 

gen_doc/py_filter.sh.in

 #!/bin/bash
 
 
-@PYTHON_EXECUTABLE@ -m doxypypy.doxypypy -a -c $* | @PYTHON_EXECUTABLE@ py_filterout_namespace.py pyfaust.__init__. pyfaust.factparams. pyfaust.demo.
+@PYTHON3_EXE@ -m doxypypy.doxypypy -a -c $* | @PYTHON3_EXE@ py_filterout_namespace.py pyfaust.__init__. pyfaust.factparams. pyfaust.demo.