Require python3

The new python module asyncio code requires python3, remove option for
python2 in autoconf and set it as a dep in setup.py

capture_sdr_rtl433/setup.py

@@ -7,6 +7,7 @@
       author_email='dragorn@kismetwireless.net',
       url='https://www.kismetwireless.net/',
       install_requires=['protobuf'],
+      python_requires='>=3.2',
       packages=find_packages(),
       entry_points={
           'console_scripts': [

capture_sdr_rtladsb/setup.py

@@ -7,6 +7,7 @@
       author_email='russell@handorf.com',
       url='https://www.handorf.com/',
       install_requires=['numpy', 'protobuf'],
+      python_requires='>=3.2',
       packages=find_packages(),
       entry_points={
           'console_scripts': [

configure

@@ -775,7 +775,6 @@ enable_capture_tools_only
 enable_element_typesafety
 enable_protobuflite
 enable_python_tools
-enable_python2
 with_python_interpreter
 enable_largefile
 enable_mutextimeout
@@ -1458,8 +1457,6 @@ Optional Features:
                           protobuf
   --disable-python-tools  Disable building Python modules and Python-only data
                           sources
-  --enable-python2        Force building with python2 instead of the modern
-                          python3
   --disable-largefile     omit support for large files
   --disable-mutextimeout  Disable failsafe thread mutex timer, use with
                           caution
@@ -8424,15 +8421,6 @@ fi
 
 PYTHON=python3
 PYTHON_VERSION=3
-# Check whether --enable-python2 was given.
-if test "${enable_python2+set}" = set; then :
-  enableval=$enable_python2; case "${enableval}" in
-	  yes) PYTHON_INTERPRETER=python2;
-           PYTHON=python2 ;
-           PYTHON_VERSION=2 ;;
-	 esac
-fi
-
 
 
 # Check whether --with-python-interpreter was given.
@@ -8478,28 +8466,6 @@ $as_echo "no" >&6; }
 		fi
 	fi
 
-    else
-
-	{ $as_echo "$as_me:${as_lineno-$LINENO}: checking python module: setuptools" >&5
-$as_echo_n "checking python module: setuptools... " >&6; }
-	python2 -c "import setuptools" 2>/dev/null
-	if test $? -eq 0;
-	then
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-		eval HAVE_PYMOD_SETUPTOOLS=yes
-	else
-		{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-		eval HAVE_PYMOD_SETUPTOOLS=no
-		#
-		if test -n ""
-		then
-			as_fn_error $? "failed to find required module setuptools" "$LINENO" 5
-			exit 1
-		fi
-	fi
-
     fi
 
     if test "$HAVE_PYMOD_SETUPTOOLS" == "no"; then
@@ -13776,13 +13742,6 @@ if test "$havelibnm" != "yes" -a "$linux" = "yes"; then
     echo "disable NetworkManager or manually tell it to ignore specific interaces."
 fi
 
-if test "$PYTHON_VERSION" != 3; then
-    echo
-    echo "*** WARNING ***"
-    echo "Building for python2; you may need to provide your own python packages of some "
-    echo "modules like numpy, which now require python3."
-fi
-
 if test "$want_asan" = "yes" -a "$want_tsan" = "yes"; then
 	echo
     echo "*** WARNING ***"

configure.ac

@@ -327,15 +327,6 @@ AC_ARG_ENABLE([python-tools],
 
 PYTHON=python3
 PYTHON_VERSION=3
-AC_ARG_ENABLE([python2],
-    AS_HELP_STRING([--enable-python2], [Force building with python2 instead of the modern python3]),
-	[case "${enableval}" in
-	  yes) PYTHON_INTERPRETER=python2;
-           PYTHON=python2 ;
-           PYTHON_VERSION=2 ;;
-	 esac],
-	[]
-)
 
 AC_ARG_WITH([python-interpreter],
     AS_HELP_STRING([--with-python-interpreter=PATH], [Custom location of python interpreter if not in normal PATH]))
@@ -357,8 +348,6 @@ if test "$want_python"x == "no"x; then
 else
     if test "$PYTHON_VERSION" == 3; then
         AC_PYTHON3_MODULE(setuptools)
-    else
-        AC_PYTHON_MODULE(setuptools)
     fi
 
     if test "$HAVE_PYMOD_SETUPTOOLS" == "no"; then
@@ -1731,13 +1720,6 @@ if test "$havelibnm" != "yes" -a "$linux" = "yes"; then
     echo "disable NetworkManager or manually tell it to ignore specific interaces."
 fi
 
-if test "$PYTHON_VERSION" != 3; then
-    echo
-    echo "*** WARNING ***"
-    echo "Building for python2; you may need to provide your own python packages of some "
-    echo "modules like numpy, which now require python3."
-fi
-
 if test "$want_asan" = "yes" -a "$want_tsan" = "yes"; then
 	echo
     echo "*** WARNING ***"