volk_gnsssdr: Fix syntax for Python 3.12

Without breaking older versions, including 2.7

docs/CHANGELOG.md

@@ -34,6 +34,8 @@ All notable changes to GNSS-SDR will be documented in this file.
 ### Improvements in Portability:
 
 - Updated local `cpu_features` library to v0.9.0.
+- `volk_gnsssdr`: fix syntax for Python 3.12 without breaking backward
+  compatibility with Python 2.7.
 
 ### Improvements in Repeatability:
 

src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/cmake/Modules/VolkPython.cmake

@@ -221,7 +221,7 @@ function(VOLK_UNIQUE_TARGET desc)
     file(RELATIVE_PATH reldir ${PROJECT_BINARY_DIR} ${CMAKE_CURRENT_BINARY_DIR})
     execute_process(COMMAND ${PYTHON_EXECUTABLE} -c "import re, hashlib
 unique = hashlib.sha256(b'${reldir}${ARGN}').hexdigest()[:5]
-print(re.sub('\\W', '_', '${desc} ${reldir} ' + unique))"
+print(re.sub(r'\\W', '_', '${desc} ${reldir} ' + unique))"
     OUTPUT_VARIABLE _target OUTPUT_STRIP_TRAILING_WHITESPACE)
     add_custom_target(${_target} ALL DEPENDS ${ARGN})
 endfunction()

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

@@ -8,7 +8,7 @@
 
 from __future__ import print_function
 
-import optparse
+import argparse
 import volk_gnsssdr_arch_defs
 import volk_gnsssdr_machine_defs
 
@@ -20,6 +20,7 @@ def do_arch_flags_list(compiler):
         output.append(','.join(fields))
     print(';'.join(output))
 
+
 def do_machines_list(arch_names):
     output = list()
     for machine in volk_gnsssdr_machine_defs.machines:
@@ -28,6 +29,7 @@ def do_machines_list(arch_names):
             output.append(machine.name)
     print(';'.join(output))
 
+
 def do_machine_flags_list(compiler, machine_name):
     output = list()
     machine = volk_gnsssdr_machine_defs.machine_dict[machine_name]
@@ -35,16 +37,18 @@ def do_machine_flags_list(compiler, machine_name):
         output.extend(arch.get_flags(compiler))
     print(' '.join(output))
 
+
 def main():
-    parser = optparse.OptionParser()
-    parser.add_option('--mode', type='string')
-    parser.add_option('--compiler', type='string')
-    parser.add_option('--archs', type='string')
-    parser.add_option('--machine', type='string')
-    (opts, args) = parser.parse_args()
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--mode', type=str)
+    parser.add_argument('--compiler', type=str)
+    parser.add_argument('--archs', type=str)
+    parser.add_argument('--machine', type=str)
+    args = parser.parse_args()
 
-    if opts.mode == 'arch_flags': return do_arch_flags_list(opts.compiler.lower())
-    if opts.mode == 'machines': return do_machines_list(opts.archs.split(';'))
-    if opts.mode == 'machine_flags': return do_machine_flags_list(opts.compiler.lower(), opts.machine)
+    if args.mode == 'arch_flags': return do_arch_flags_list(args.compiler.lower())
+    if args.mode == 'machines': return do_machines_list(args.archs.split(';'))
+    if args.mode == 'machine_flags': return do_machine_flags_list(args.compiler.lower(), args.machine)
 
-if __name__ == '__main__': main()
+if __name__ == '__main__':
+    main()

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

@@ -16,7 +16,7 @@ import glob
 ########################################################################
 # Strip comments from a c/cpp file.
 # Input is code string, output is code string without comments.
-# https://stackoverflow.com/questions/241327/remove-c-and-c-comments-using-python
+# https://stackoverflow.com/questions/241327/python-snippet-to-remove-c-and-c-comments
 ########################################################################
 def comment_remover(text):
     def replacer(match):
@@ -120,7 +120,7 @@ class impl_class(object):
             self.args = list()
             fcn_args = the_rest.split(',')
             for fcn_arg in fcn_args:
-                arg_matcher = re.compile(r'^\s*(.*\W)\s*(\w+)\s*$', re.DOTALL | re.MULTILINE)
+                arg_matcher = re.compile(r'^\s*(.*[^\w])\s*(\w+)\s*$', re.DOTALL | re.MULTILINE)
                 m = arg_matcher.match(fcn_arg)
                 arg_type, arg_name = m.groups()
                 self.args.append((arg_type, arg_name))
@@ -164,6 +164,8 @@ class kernel_class(object):
                     kern_name=self.name, header=sub_hdr, body=body,
                 ))
         assert(self._impls)
+        if "generic" not in [impl.name for impl in self._impls]:
+            raise Exception("{} does not have a generic protokernel.".format(self.name))
         self.has_dispatcher = False
         for impl in self._impls:
             if impl.name == 'dispatcher':

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

@@ -11,7 +11,7 @@ from __future__ import print_function
 import os
 import re
 import sys
-import optparse
+import argparse
 import volk_gnsssdr_arch_defs
 import volk_gnsssdr_machine_defs
 import volk_gnsssdr_kernel_defs
@@ -34,13 +34,14 @@ def __parse_tmpl(_tmpl, **kwargs):
     return str(Template(_tmpl).render(**defs))
 
 def main():
-    parser = optparse.OptionParser()
-    parser.add_option('--input', type='string')
-    parser.add_option('--output', type='string')
-    (opts, args) = parser.parse_args()
+    parser = argparse.ArgumentParser()
+    parser.add_argument('--input', type=str)
+    parser.add_argument('--output', type=str)
+    args, extras = parser.parse_known_args()
 
-    output = __parse_tmpl(open(opts.input).read(), args=args)
-    if opts.output: open(opts.output, 'w').write(output)
+    output = __parse_tmpl(open(args.input).read(), args=extras)
+    if args.output: open(args.output, 'w').write(output)
     else: print(output)
 
-if __name__ == '__main__': main()
+if __name__ == '__main__':
+    main()

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

@@ -113,7 +113,7 @@ macro(check_arch arch_name)
             set(have_flag have${flag})
             # make the have_flag have nice alphanum chars (just for looks/not necessary)
             execute_process(
-                COMMAND ${PYTHON_EXECUTABLE} -c "import re; print(re.sub('\\W', '_', '${have_flag}'))"
+                COMMAND ${PYTHON_EXECUTABLE} -c "import re; print(re.sub(r'\\W', '_', '${have_flag}'))"
                 OUTPUT_VARIABLE have_flag OUTPUT_STRIP_TRAILING_WHITESPACE
             )
             if(VOLK_FLAG_CHECK_FLAGS)

src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/python/volk_gnsssdr_modtool/volk_gnsssdr_modtool_generate.py

@@ -290,9 +290,7 @@ class volk_gnsssdr_modtool(object):
         inserted = False;
         insert = False
         for otherline in otherlines:
-
-            if (re.match('\s*', otherline) == None or re.match('\s*#.*', otherline) == None):
-
+            if re.match(r'\s*', otherline) is None or re.match(r'\s*#.*', otherline) is None:
                 insert = True;
             if insert and not inserted:
                 inserted = True;