Placing grcc compilation utils in separate files
Avoiding increasing required cmake version with use of wrapper shell script.
diff --git a/cmake/Modules/GrccCompile.cmake b/cmake/Modules/GrccCompile.cmake
new file mode 100644
index 0000000..bcb1b38
--- /dev/null
+++ b/cmake/Modules/GrccCompile.cmake
@@ -0,0 +1,73 @@
+# Author (C) 2018 by Piotr Krysik <ptrkrysik@gmail.com>
+# Author (C) 2018 by Vasil Velichkov <vvvelichkov@gmail.com>
+#
+# 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.
+
+SET(PYTHONPATH
+ ${CMAKE_SOURCE_DIR}/python
+ ${CMAKE_SOURCE_DIR}/python/misc_utils
+ ${CMAKE_SOURCE_DIR}/python/demapping
+ ${CMAKE_SOURCE_DIR}/python/receiver
+ ${CMAKE_SOURCE_DIR}/python/transmitter
+ ${CMAKE_SOURCE_DIR}/python/trx
+ ${CMAKE_BINARY_DIR}/swig
+ $ENV{PYTHONPATH}
+ )
+string(REPLACE ";" ":" PYTHONPATH "${PYTHONPATH}")
+
+macro(GRCC_COMPILE file_name)
+ if(${CMAKE_VERSION} VERSION_LESS "3.2.0") #use wrapper script to set the environment on systems without cmake 3.2
+ ADD_CUSTOM_COMMAND(
+ OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${file_name}
+ COMMAND /bin/sh ${CMAKE_SOURCE_DIR}/cmake/Modules/GrccCompileWrapper.sh "${PYTHONPATH}" "${CMAKE_SOURCE_DIR}/grc" "${PC_GNURADIO_RUNTIME_PREFIX}/${GR_RUNTIME_DIR}/grcc -d ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/${file_name}.grc"
+ COMMAND "${CMAKE_COMMAND}" -E rename ${CMAKE_CURRENT_BINARY_DIR}/${file_name}.py ${CMAKE_CURRENT_BINARY_DIR}/${file_name}
+ DEPENDS ${file_name}.grc
+ )
+ else() #for the rest use new/more portable way
+ ADD_CUSTOM_COMMAND(
+ OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${file_name}
+ COMMAND "${CMAKE_COMMAND}"
+ -E env PYTHONPATH="${PYTHONPATH}" GRC_BLOCKS_PATH=${CMAKE_SOURCE_DIR}/grc
+ ${PC_GNURADIO_RUNTIME_PREFIX}/${GR_RUNTIME_DIR}/grcc -d ${CMAKE_CURRENT_BINARY_DIR}
+ ${CMAKE_CURRENT_SOURCE_DIR}/${file_name}.grc
+ COMMAND "${CMAKE_COMMAND}" -E rename ${CMAKE_CURRENT_BINARY_DIR}/${file_name}.py ${CMAKE_CURRENT_BINARY_DIR}/${file_name}
+ DEPENDS ${file_name}.grc
+ )
+ endif()
+endmacro(GRCC_COMPILE)
+
+########################################################################
+# Override the GR_UNIQUE_TARGET function to not append a hash
+# to the `target` name, because we need a known name in order
+# to add an explicit dependency that's needed for the parallel build
+#
+# The original code segment (taken from GrPython.cmake) is
+#
+# 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)
+#
+########################################################################
+function(GR_UNIQUE_TARGET desc)
+ file(RELATIVE_PATH reldir ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_BINARY_DIR})
+ execute_process(COMMAND ${PYTHON_EXECUTABLE} -c "import re, hashlib
+print(re.sub('\\W', '_', '${desc} ${reldir}'))"
+ OUTPUT_VARIABLE _target OUTPUT_STRIP_TRAILING_WHITESPACE)
+ add_custom_target(${_target} ALL DEPENDS ${ARGN})
+endfunction(GR_UNIQUE_TARGET)