Adding -qt=X option only if qmake is a link to qtchooser

On Linux (at least on Ubuntu and Debian) qtchooser is used to switch between different installations of Qt.
A user reported that on Windows this method does not (seem) exist.

Don't know whether his/her Qt5 setup was correct or not, but this commit adds a check, which
* Looks whether qmake exists at all
* Checks whether it is a symlink
* Checks whether the symlink is pointing at a existing file
* And check whether this file is qtchooser.

It doesn't matter if the link is called "/usr/bin/qtchooser" or "qtchooser" and we only add "-qt=X" in these cases.

1 files changed, 10 insertions, 1 deletions

diff --git a/setup.py b/setup.py
index b6ab9161c..42234fe5b 100644
--- a/setup.py
+++ b/setup.py
@@ -168,6 +168,15 @@ if OPTION_QMAKE is None:
     OPTION_QMAKE = find_executable("qmake-qt5")
 if OPTION_QMAKE is None:
     OPTION_QMAKE = find_executable("qmake")
+
+QMAKE_COMMAND = None
+if os.path.exists(OPTION_QMAKE): # Checking whether qmake executable exists
+    if os.path.islink(OPTION_QMAKE) and os.path.lexists(OPTION_QMAKE): # Looking whether qmake path is a link and whether the link exists
+        if "qtchooser" in os.readlink(OPTION_QMAKE): # Set -qt=X here.
+            QMAKE_COMMAND = [OPTION_QMAKE, "-qt=%s" %(OPTION_QT_VERSION)]
+if not QMAKE_COMMAND:
+    QMAKE_COMMAND = [OPTION_QMAKE]
+
 if OPTION_CMAKE is None:
     OPTION_CMAKE = find_executable("cmake")
 
@@ -463,7 +472,7 @@ class pyside_build(_build):
                 log.error("Failed to locate a dynamic Python library, using %s"
                           % py_library)
 
-        qtinfo = QtInfo([OPTION_QMAKE, "-qt=%s" %(OPTION_QT_VERSION)])
+        qtinfo = QtInfo(QMAKE_COMMAND)
         qt_dir = os.path.dirname(OPTION_QMAKE)
         qt_version = qtinfo.version
         if not qt_version: