volk_gnsssdr: do not write files in source tree when building

src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/gen/volk_gnsssdr_arch_defs.py.in

@@ -49,8 +49,7 @@ def register_arch(**kwargs):
 #TODO skip the XML and put it here
 from xml.dom import minidom
 import os
-gendir = os.path.dirname(__file__)
-archs_xml = minidom.parse(os.path.join(gendir, '@VOLK_GNSSSSDR_ARCHS_XML_FILE@')).getElementsByTagName('arch')
+archs_xml = minidom.parse(os.path.join('@PROJECT_SOURCE_DIR@', 'gen', '@VOLK_GNSSSSDR_ARCHS_XML_FILE@')).getElementsByTagName('arch')
 for arch_xml in archs_xml:
     kwargs = dict()
     for attr in arch_xml.attributes.keys():

src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/gen/volk_gnsssdr_compile_utils.py

@@ -9,6 +9,27 @@
 from __future__ import print_function
 
 import argparse
+import os
+import sys
+
+sys.dont_write_bytecode = True
+
+def extract_generated_python_dir(args):
+    option = '--generated-python-dir'
+    if option in args:
+        option_index = args.index(option)
+        if option_index + 1 < len(args):
+            return args[option_index + 1]
+    option_prefix = option + '='
+    for arg in args:
+        if arg.startswith(option_prefix):
+            return arg[len(option_prefix):]
+    return os.environ.get('VOLK_GNSSSDR_GENERATED_PYTHON_DIR')
+
+generated_python_dir = extract_generated_python_dir(sys.argv[1:])
+if generated_python_dir:
+    sys.path.insert(0, generated_python_dir)
+
 import volk_gnsssdr_arch_defs
 import volk_gnsssdr_machine_defs
 
@@ -44,6 +65,7 @@ def main():
     parser.add_argument('--compiler', type=str)
     parser.add_argument('--archs', type=str)
     parser.add_argument('--machine', type=str)
+    parser.add_argument('--generated-python-dir', type=str)
     args = parser.parse_args()
 
     if args.mode == 'arch_flags': return do_arch_flags_list(args.compiler.lower())

src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/gen/volk_gnsssdr_tmpl_utils.py

@@ -12,6 +12,25 @@ import os
 import re
 import sys
 import argparse
+
+sys.dont_write_bytecode = True
+
+def extract_generated_python_dir(args):
+    option = '--generated-python-dir'
+    if option in args:
+        option_index = args.index(option)
+        if option_index + 1 < len(args):
+            return args[option_index + 1]
+    option_prefix = option + '='
+    for arg in args:
+        if arg.startswith(option_prefix):
+            return arg[len(option_prefix):]
+    return os.environ.get('VOLK_GNSSSDR_GENERATED_PYTHON_DIR')
+
+generated_python_dir = extract_generated_python_dir(sys.argv[1:])
+if generated_python_dir:
+    sys.path.insert(0, generated_python_dir)
+
 import volk_gnsssdr_arch_defs
 import volk_gnsssdr_machine_defs
 import volk_gnsssdr_kernel_defs
@@ -37,6 +56,7 @@ def main():
     parser = argparse.ArgumentParser()
     parser.add_argument('--input', type=str)
     parser.add_argument('--output', type=str)
+    parser.add_argument('--generated-python-dir', type=str)
     args, extras = parser.parse_known_args()
 
     output = __parse_tmpl(open(args.input).read(), args=extras)

src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/lib/CMakeLists.txt

@@ -91,14 +91,16 @@ if(USE_CPU_FEATURES)
 else()
     set(VOLK_GNSSSSDR_ARCHS_XML_FILE "archs_old.xml")
 endif()
+file(MAKE_DIRECTORY ${PROJECT_BINARY_DIR}/gen)
 configure_file(${PROJECT_SOURCE_DIR}/gen/volk_gnsssdr_arch_defs.py.in
-    ${PROJECT_SOURCE_DIR}/gen/volk_gnsssdr_arch_defs.py
+    ${PROJECT_BINARY_DIR}/gen/volk_gnsssdr_arch_defs.py
     @ONLY
 )
 
 execute_process(
     COMMAND ${PYTHON_EXECUTABLE} ${PYTHON_DASH_B}
     ${PROJECT_SOURCE_DIR}/gen/volk_gnsssdr_compile_utils.py
+    --generated-python-dir ${PROJECT_BINARY_DIR}/gen
     --mode "arch_flags" --compiler "${COMPILER_NAME}"
     OUTPUT_VARIABLE arch_flag_lines OUTPUT_STRIP_TRAILING_WHITESPACE
 )
@@ -320,6 +322,7 @@ message(STATUS "Available architectures: ${available_archs}")
 execute_process(
     COMMAND ${PYTHON_EXECUTABLE} ${PYTHON_DASH_B}
     ${PROJECT_SOURCE_DIR}/gen/volk_gnsssdr_compile_utils.py
+    --generated-python-dir ${PROJECT_BINARY_DIR}/gen
     --mode "machines" --archs "${available_archs}"
     OUTPUT_VARIABLE available_machines OUTPUT_STRIP_TRAILING_WHITESPACE
 )
@@ -359,6 +362,8 @@ else()
 endif()
 list(SORT xml_files)
 file(GLOB py_files ${PROJECT_SOURCE_DIR}/gen/*.py)
+list(REMOVE_ITEM py_files ${PROJECT_SOURCE_DIR}/gen/volk_gnsssdr_arch_defs.py)
+list(APPEND py_files ${PROJECT_BINARY_DIR}/gen/volk_gnsssdr_arch_defs.py)
 list(SORT py_files)
 file(GLOB h_files ${PROJECT_SOURCE_DIR}/kernels/volk_gnsssdr/*.h)
 list(SORT h_files)
@@ -370,6 +375,7 @@ macro(gen_template tmpl output)
         DEPENDS ${xml_files} ${py_files} ${h_files} ${tmpl}
         COMMAND ${PYTHON_EXECUTABLE} ${PYTHON_DASH_B}
         ${PROJECT_SOURCE_DIR}/gen/volk_gnsssdr_tmpl_utils.py
+        --generated-python-dir ${PROJECT_BINARY_DIR}/gen
         --input ${tmpl} --output ${output} ${ARGN}
     )
 endmacro()
@@ -429,6 +435,7 @@ foreach(machine_name ${available_machines})
     execute_process(
         COMMAND ${PYTHON_EXECUTABLE} ${PYTHON_DASH_B}
         ${PROJECT_SOURCE_DIR}/gen/volk_gnsssdr_compile_utils.py
+        --generated-python-dir ${PROJECT_BINARY_DIR}/gen
         --mode "machine_flags" --machine "${machine_name}" --compiler "${COMPILER_NAME}"
         OUTPUT_VARIABLE ${machine_name}_flags OUTPUT_STRIP_TRAILING_WHITESPACE
     )