Switch to python3 by default

- Python 2.7 is planned to be the last of the 2.x releases
- It's generally advised to use Python 3
- Majority of python/ scripts are already switched python3
- Users with python 2 only can still use:

$ make PYTHON=/usr/bin/python ....

Signed-off-by: Petr Lautrbach <plautrba@redhat.com>

libselinux/src/Makefile

@@ -1,7 +1,7 @@
 # Support building the Python bindings multiple times, against various Python
 # runtimes (e.g. Python 2 vs Python 3) by optionally prefixing the build
 # targets with "PYPREFIX":
-PYTHON ?= python
+PYTHON ?= python3
 PYPREFIX ?= $(shell $(PYTHON) -c 'import sys;print("python-%d.%d" % sys.version_info[:2])')
 RUBY ?= ruby
 RUBYPREFIX ?= $(notdir $(RUBY))

libsemanage/src/Makefile

@@ -1,7 +1,7 @@
 # Support building the Python bindings multiple times, against various Python
 # runtimes (e.g. Python 2 vs Python 3) by optionally prefixing the build
 # targets with "PYPREFIX":
-PYTHON ?= python
+PYTHON ?= python3
 PYPREFIX ?= $(shell $(PYTHON) -c 'import sys;print("python-%d.%d" % sys.version_info[:2])')
 RUBY ?= ruby
 RUBYPREFIX ?= $(notdir $(RUBY))

python/audit2allow/Makefile

@@ -1,4 +1,4 @@
-PYTHON ?= python
+PYTHON ?= python3
 SECILC ?= secilc
 
 # Installation directories.

python/semanage/Makefile

@@ -1,4 +1,4 @@
-PYTHON ?= python
+PYTHON ?= python3
 
 # Installation directories.
 LINGUAS ?= ru

python/sepolgen/src/sepolgen/Makefile

@@ -1,5 +1,5 @@
 PREFIX ?= /usr
-PYTHON ?= python
+PYTHON ?= python3
 PYTHONLIBDIR ?= $(shell $(PYTHON) -c "from distutils.sysconfig import *; print(get_python_lib(prefix='$(PREFIX)'))")
 PACKAGEDIR ?= /$(PYTHONLIBDIR)/sepolgen
 

python/sepolgen/tests/Makefile

@@ -1,4 +1,4 @@
-PYTHON ?= python
+PYTHON ?= python3
 
 clean:
 	rm -f *~ *.pyc

python/sepolicy/Makefile

@@ -1,4 +1,4 @@
-PYTHON ?= python
+PYTHON ?= python3
 
 # Installation directories.
 LINGUAS ?= ru

sandbox/Makefile

@@ -1,4 +1,4 @@
-PYTHON ?= python
+PYTHON ?= python3
 
 # Installation directories.
 LINGUAS ?= ru

scripts/env_use_destdir

@@ -25,7 +25,7 @@ export LD_LIBRARY_PATH="$DESTDIR/usr/lib:$DESTDIR/lib"
 export PATH="$DESTDIR/usr/sbin:$DESTDIR/usr/bin:$DESTDIR/sbin:$DESTDIR/bin:$PATH"
 
 # shellcheck disable=SC2155
-export PYTHONPATH="$DESTDIR$(${PYTHON:-python} -c "from distutils.sysconfig import *;print(get_python_lib(prefix='/usr'))")"
+export PYTHONPATH="$DESTDIR$(${PYTHON:-python3} -c "from distutils.sysconfig import *;print(get_python_lib(prefix='/usr'))")"
 
 # shellcheck disable=SC2155
 export RUBYLIB="$DESTDIR/$(${RUBY:-ruby} -e 'puts RbConfig::CONFIG["vendorlibdir"]'):$DESTDIR/$(${RUBY:-ruby} -e 'puts RbConfig::CONFIG["vendorarchdir"]')"

scripts/run-scan-build

@@ -17,7 +17,7 @@ fi
 # Make sure to use the newly-installed libraries when running tests
 export LD_LIBRARY_PATH="$DESTDIR/usr/lib:$DESTDIR/lib"
 export PATH="$DESTDIR/usr/sbin:$DESTDIR/usr/bin:$DESTDIR/sbin:$DESTDIR/bin:$PATH"
-export PYTHONPATH="$DESTDIR$(${PYTHON:-python} -c "from distutils.sysconfig import *;print(get_python_lib(prefix='/usr'))")"
+export PYTHONPATH="$DESTDIR$(${PYTHON:-python3} -c "from distutils.sysconfig import *;print(get_python_lib(prefix='/usr'))")"
 export RUBYLIB="$DESTDIR/$(${RUBY:-ruby} -e 'puts RbConfig::CONFIG["vendorlibdir"]'):$DESTDIR/$(${RUBY:-ruby} -e 'puts RbConfig::CONFIG["vendorarchdir"]')"
 
 # Build and analyze