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# Copyright 2010-2011 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# GNU Radio is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
if(DEFINED __INCLUDED_GR_PYTHON_CMAKE)
return()
endif()
set(__INCLUDED_GR_PYTHON_CMAKE TRUE)
########################################################################
# Setup the python interpreter:
# This allows the user to specify a specific interpreter,
# or finds the interpreter via the built-in cmake module.
########################################################################
#this allows the user to override PYTHON_EXECUTABLE
if(PYTHON_EXECUTABLE)
set(PYTHONINTERP_FOUND TRUE)
#otherwise if not set, try to automatically find it
else(PYTHON_EXECUTABLE)
#use the built-in find script
find_package(PythonInterp)
#and if that fails use the find program routine
if(NOT PYTHONINTERP_FOUND)
find_program(PYTHON_EXECUTABLE NAMES python python2.7 python2.6 python2.5)
if(PYTHON_EXECUTABLE)
set(PYTHONINTERP_FOUND TRUE)
endif(PYTHON_EXECUTABLE)
endif(NOT PYTHONINTERP_FOUND)
endif(PYTHON_EXECUTABLE)
#make the path to the executable appear in the cmake gui
set(PYTHON_EXECUTABLE ${PYTHON_EXECUTABLE} CACHE FILEPATH "python interpreter")
#make sure we can use -B with python (introduced in 2.6)
if(PYTHON_EXECUTABLE)
execute_process(
COMMAND ${PYTHON_EXECUTABLE} -B -c ""
OUTPUT_QUIET ERROR_QUIET
RESULT_VARIABLE PYTHON_HAS_DASH_B_RESULT
)
if(PYTHON_HAS_DASH_B_RESULT EQUAL 0)
set(PYTHON_DASH_B "-B")
endif()
endif(PYTHON_EXECUTABLE)
########################################################################
# Check for the existence of a python module:
# - desc a string description of the check
# - mod the name of the module to import
# - cmd an additional command to run
# - have the result variable to set
########################################################################
macro(GR_PYTHON_CHECK_MODULE desc mod cmd have)
message(STATUS "")
message(STATUS "Python checking for ${desc}")
execute_process(
COMMAND ${PYTHON_EXECUTABLE} -c "
#########################################
try:
import ${mod}
assert ${cmd}
except ImportError, AssertionError: exit(-1)
except: pass
#########################################"
RESULT_VARIABLE ${have}
)
if(${have} EQUAL 0)
message(STATUS "Python checking for ${desc} - found")
set(${have} TRUE)
else(${have} EQUAL 0)
message(STATUS "Python checking for ${desc} - not found")
set(${have} FALSE)
endif(${have} EQUAL 0)
endmacro(GR_PYTHON_CHECK_MODULE)
########################################################################
# Sets the python installation directory GR_PYTHON_DIR
########################################################################
if(NOT DEFINED GR_PYTHON_DIR)
execute_process(COMMAND ${PYTHON_EXECUTABLE} -c "
from distutils import sysconfig
print sysconfig.get_python_lib(plat_specific=True, prefix='')
" OUTPUT_VARIABLE GR_PYTHON_DIR OUTPUT_STRIP_TRAILING_WHITESPACE
)
endif()
file(TO_CMAKE_PATH ${GR_PYTHON_DIR} GR_PYTHON_DIR)
########################################################################
# Create an always-built target with a unique name
# Usage: GR_UNIQUE_TARGET(<description> <dependencies list>)
########################################################################
function(GR_UNIQUE_TARGET desc)
file(RELATIVE_PATH reldir ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_BINARY_DIR})
execute_process(COMMAND ${PYTHON_EXECUTABLE} -c "import re, hashlib
unique = hashlib.md5('${reldir}${ARGN}').hexdigest()[:5]
print(re.sub('\\W', '_', '${desc} ${reldir} ' + unique))"
OUTPUT_VARIABLE _target OUTPUT_STRIP_TRAILING_WHITESPACE)
add_custom_target(${_target} ALL DEPENDS ${ARGN})
endfunction(GR_UNIQUE_TARGET)
########################################################################
# Install python sources (also builds and installs byte-compiled python)
########################################################################
function(GR_PYTHON_INSTALL)
include(CMakeParseArgumentsCopy)
CMAKE_PARSE_ARGUMENTS(GR_PYTHON_INSTALL "" "DESTINATION;COMPONENT" "FILES;PROGRAMS" ${ARGN})
####################################################################
if(GR_PYTHON_INSTALL_FILES)
####################################################################
install(${ARGN}) #installs regular python files
#create a list of all generated files
unset(pysrcfiles)
unset(pycfiles)
unset(pyofiles)
foreach(pyfile ${GR_PYTHON_INSTALL_FILES})
get_filename_component(pyfile ${pyfile} ABSOLUTE)
list(APPEND pysrcfiles ${pyfile})
#determine if this file is in the source or binary directory
file(RELATIVE_PATH source_rel_path ${CMAKE_CURRENT_SOURCE_DIR} ${pyfile})
string(LENGTH "${source_rel_path}" source_rel_path_len)
file(RELATIVE_PATH binary_rel_path ${CMAKE_CURRENT_BINARY_DIR} ${pyfile})
string(LENGTH "${binary_rel_path}" binary_rel_path_len)
#and set the generated path appropriately
if(${source_rel_path_len} GREATER ${binary_rel_path_len})
set(pygenfile ${CMAKE_CURRENT_BINARY_DIR}/${binary_rel_path})
else()
set(pygenfile ${CMAKE_CURRENT_BINARY_DIR}/${source_rel_path})
endif()
list(APPEND pycfiles ${pygenfile}c)
list(APPEND pyofiles ${pygenfile}o)
#ensure generation path exists
get_filename_component(pygen_path ${pygenfile} PATH)
file(MAKE_DIRECTORY ${pygen_path})
endforeach(pyfile)
#the command to generate the pyc files
add_custom_command(
DEPENDS ${pysrcfiles} OUTPUT ${pycfiles}
COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_BINARY_DIR}/python_compile_helper.py ${pysrcfiles} ${pycfiles}
)
#the command to generate the pyo files
add_custom_command(
DEPENDS ${pysrcfiles} OUTPUT ${pyofiles}
COMMAND ${PYTHON_EXECUTABLE} -O ${CMAKE_BINARY_DIR}/python_compile_helper.py ${pysrcfiles} ${pyofiles}
)
#create install rule and add generated files to target list
set(python_install_gen_targets ${pycfiles} ${pyofiles})
install(FILES ${python_install_gen_targets}
DESTINATION ${GR_PYTHON_INSTALL_DESTINATION}
COMPONENT ${GR_PYTHON_INSTALL_COMPONENT}
)
####################################################################
elseif(GR_PYTHON_INSTALL_PROGRAMS)
####################################################################
file(TO_NATIVE_PATH ${PYTHON_EXECUTABLE} pyexe_native)
if (CMAKE_CROSSCOMPILING)
set(pyexe_native /usr/bin/env python)
endif()
foreach(pyfile ${GR_PYTHON_INSTALL_PROGRAMS})
get_filename_component(pyfile_name ${pyfile} NAME)
get_filename_component(pyfile ${pyfile} ABSOLUTE)
string(REPLACE "${CMAKE_SOURCE_DIR}" "${CMAKE_BINARY_DIR}" pyexefile "${pyfile}.exe")
list(APPEND python_install_gen_targets ${pyexefile})
get_filename_component(pyexefile_path ${pyexefile} PATH)
file(MAKE_DIRECTORY ${pyexefile_path})
add_custom_command(
OUTPUT ${pyexefile} DEPENDS ${pyfile}
COMMAND ${PYTHON_EXECUTABLE} -c
\"open('${pyexefile}', 'w').write('\#!${pyexe_native}\\n'+open('${pyfile}').read())\"
COMMENT "Shebangin ${pyfile_name}"
)
#on windows, python files need an extension to execute
get_filename_component(pyfile_ext ${pyfile} EXT)
if(WIN32 AND NOT pyfile_ext)
set(pyfile_name "${pyfile_name}.py")
endif()
install(PROGRAMS ${pyexefile} RENAME ${pyfile_name}
DESTINATION ${GR_PYTHON_INSTALL_DESTINATION}
COMPONENT ${GR_PYTHON_INSTALL_COMPONENT}
)
endforeach(pyfile)
endif()
GR_UNIQUE_TARGET("pygen" ${python_install_gen_targets})
endfunction(GR_PYTHON_INSTALL)
########################################################################
# Write the python helper script that generates byte code files
########################################################################
file(WRITE ${CMAKE_BINARY_DIR}/python_compile_helper.py "
import sys, py_compile
files = sys.argv[1:]
srcs, gens = files[:len(files)/2], files[len(files)/2:]
for src, gen in zip(srcs, gens):
py_compile.compile(file=src, cfile=gen, doraise=True)
")
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