libselinux: query for python site-packages dir directly

instead of building the path manually which is more error prone

Signed-off-by: Jason Zaman <[email protected]>

libselinux/src/Makefile

@@ -12,9 +12,8 @@ PREFIX ?= $(DESTDIR)/usr
 LIBDIR ?= $(PREFIX)/lib
 SHLIBDIR ?= $(DESTDIR)/lib
 INCLUDEDIR ?= $(PREFIX)/include
-PYLIBVER ?= $(shell $(PYTHON) -c 'import sys;print("python%d.%d" % sys.version_info[0:2])')
 PYINC ?= $(shell $(PKG_CONFIG) --cflags $(PYPREFIX))
-PYLIBDIR ?= $(LIBDIR)/$(PYLIBVER)
+PYSITEDIR ?= $(DESTDIR)$(shell $(PYTHON) -c 'import site; print(site.getsitepackages()[0])')
 RUBYLIBVER ?= $(shell $(RUBY) -e 'print RUBY_VERSION.split(".")[0..1].join(".")')
 RUBYINC ?= $(shell $(PKG_CONFIG) --exists ruby-$(RUBYLIBVER) && $(PKG_CONFIG) --cflags ruby-$(RUBYLIBVER) || $(PKG_CONFIG) --cflags ruby)
 RUBYINSTALL ?= $(DESTDIR)$(shell $(RUBY) -e 'puts RbConfig::CONFIG["vendorarchdir"]')
@@ -160,10 +159,10 @@ install: all
 	ln -sf --relative $(SHLIBDIR)/$(LIBSO) $(LIBDIR)/$(TARGET)
 
 install-pywrap: pywrap
-	test -d $(PYLIBDIR)/site-packages/selinux || install -m 755 -d $(PYLIBDIR)/site-packages/selinux
-	install -m 755 $(SWIGSO) $(PYLIBDIR)/site-packages/_selinux.so
-	install -m 755 $(AUDIT2WHYSO) $(PYLIBDIR)/site-packages/selinux/audit2why.so
-	install -m 644 $(SWIGPYOUT) $(PYLIBDIR)/site-packages/selinux/__init__.py
+	test -d $(PYSITEDIR)/selinux || install -m 755 -d $(PYSITEDIR)/selinux
+	install -m 755 $(SWIGSO) $(PYSITEDIR)/_selinux.so
+	install -m 755 $(AUDIT2WHYSO) $(PYSITEDIR)/selinux/audit2why.so
+	install -m 644 $(SWIGPYOUT) $(PYSITEDIR)/selinux/__init__.py
 
 install-rubywrap: rubywrap
 	test -d $(RUBYINSTALL) || install -m 755 -d $(RUBYINSTALL)