Fix python site-packages dir

Fixes the need for PYTHONPATH on Gentoo

Signed-off-by: Alec Ari <neotheuser@ymail.com>

Author: NTULINUX

debian/linuxcnc.install.in

@@ -110,7 +110,7 @@ usr/bin/xyzbc-trt-gui
 
 usr/lib/lib*.so.*
 usr/lib/linuxcnc
-usr/lib/python3
+usr/lib/python3*
 usr/lib/tcltk
 
 usr/share/axis

lib/python/qtvcp/designer/install_script

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+SITEPY=$(python3 -c "import site; print([p for p in site.getsitepackages() if p.startswith('/usr/lib') and '/lib64/' not in p][0])")
+
 # install base packages for displaying qtvcp screens and sounds
 echo -e '\ninstalling common base packages'
 sudo apt-get install -y gstreamer1.0-tools espeak espeak-ng sound-theme-freedesktop
@@ -62,11 +64,11 @@ if [ "$response" -eq 2 ]; then
 # for full LinuxCNC installation
 elif [ "$response" -eq 3 ]; then
     # check for valid plugin file
-    if [ -f /usr/lib/python3/dist-packages/qtvcp/plugins/qtvcp_plugin.py ]; then
-        pifile=/usr/lib/python3/dist-packages/qtvcp/plugins/qtvcp_plugin.py
+    if [ -f "${SITEPY}/qtvcp/plugins/qtvcp_plugin.py" ]; then
+        pifile="${SITEPY}/qtvcp/plugins/qtvcp_plugin.py"
     else
 #        clear
-        echo -e '\n'"$pifile "'not found in /usr/lib/python3/dist-packages/qtvcp/plugins/'
+        echo -e '\n'"$pifile "'not found in ${SITEPY}/qtvcp/plugins/'
         echo -e '\ncannot continue designer installation\n'
         exit
     fi

scripts/setup_designer.in

@@ -1,5 +1,7 @@
 #!/bin/bash
 
+SITEPY=$(python3 -c "import site; print([p for p in site.getsitepackages() if p.startswith('/usr/lib') and '/lib64/' not in p][0])")
+
 # install base packages for displaying qtvcp screens and sounds
 echo -e '\ninstalling common base packages'
 sudo apt-get install -y gstreamer1.0-tools espeak espeak-ng sound-theme-freedesktop
@@ -62,11 +64,11 @@ if [ "$response" -eq 2 ]; then
 # for full LinuxCNC installation
 elif [ "$response" -eq 3 ]; then
     # check for valid plugin file
-    if [ -f /usr/lib/python3/dist-packages/qtvcp/plugins/qtvcp_plugin.py ]; then
-        pifile=/usr/lib/python3/dist-packages/qtvcp/plugins/qtvcp_plugin.py
+    if [ -f "${SITEPY}/qtvcp/plugins/qtvcp_plugin.py" ]; then
+        pifile="${SITEPY}/qtvcp/plugins/qtvcp_plugin.py"
     else
 #        clear
-        echo -e '\n'"$pifile"' not found in /usr/lib/python3/dist-packages/qtvcp/plugins/'
+        echo -e '\n'"$pifile"' not found in "${SITEPY}/qtvcp/plugins/'
         echo -e '\ncannot continue designer installation\n'
         exit
     fi

src/configure.ac

@@ -1657,7 +1657,7 @@ fi
 AC_MSG_RESULT([$PYTHON_TK_VERSION])
 
 AC_MSG_CHECKING(for site-package location)
-SITEPY="$($PYTHON -c 'import sysconfig; s = sysconfig.get_scheme_names(); m=list(set(("deb_system", "rpm_prefix")) & set(s)); print(sysconfig.get_path("platlib", m.__getitem__(0))) if m else print("/usr/lib/python3/dist-packages");')"
+SITEPY="$PYTHON_SITE_PKG"
 AC_MSG_RESULT($SITEPY)
 
 AC_MSG_CHECKING(for working GLU quadrics)