From 30cf2aa7830a09b2bc4132eb3a3920fc0853b827 Mon Sep 17 00:00:00 2001
From: Sam James <sam@gentoo.org>
Date: Fri, 9 Jun 2023 09:57:18 +0100
Subject: [PATCH 4/6] Ensure that the correct version of Qt is always used.

With the introduction qt-4.8.6, Qt binaries were moved from /usr/bin to
/usr/$(get_libdir)/qt4/bin, leaving behind in their place symlinks to qtchooser.

There is no guarantee to which version of Qt these symlinks might point, so it
is necessary to find the correct version explicitly.

Once qmake is found, it is queried for the correct location of all other items.

Bug: https://bugs.gentoo.org/547222

[imported from cmake-3.5.2-FindQt4.patch.]

Signed-off-by: Sam James <sam@gentoo.org>
--- a/Modules/FindQt4.cmake
+++ b/Modules/FindQt4.cmake
@@ -478,13 +478,23 @@ function(_QT4_FIND_QMAKE QMAKE_NAMES QMAKE_RESULT VERSION_RESULT)
 
   get_filename_component(qt_install_version "[HKEY_CURRENT_USER\\Software\\trolltech\\Versions;DefaultQtVersion]" NAME)
 
-  find_program(QT_QMAKE_EXECUTABLE NAMES ${QMAKE_NAME}
-    PATHS
-      ENV QTDIR
-      "[HKEY_CURRENT_USER\\Software\\Trolltech\\Versions\\${qt_install_version};InstallDir]"
-    PATH_SUFFIXES bin
-    DOC "The qmake executable for the Qt installation to use"
-  )
+  if(CMAKE_GENTOO_BUILD OR CMAKE_BUILD_TYPE STREQUAL Gentoo)
+    find_program(QT_QMAKE_EXECUTABLE NAMES ${QMAKE_NAME}
+      PATHS
+        $ENV{EPREFIX}/usr/${CMAKE_INSTALL_LIBDIR}/qt4/bin
+        $ENV{EPREFIX}/usr/bin
+        NO_DEFAULT_PATH
+      DOC "The qmake executable for the Qt installation to use"
+    )
+  else()
+    find_program(QT_QMAKE_EXECUTABLE NAMES ${QMAKE_NAME}
+      PATHS
+        ENV QTDIR
+        "[HKEY_CURRENT_USER\\Software\\Trolltech\\Versions\\${qt_install_version};InstallDir]"
+      PATH_SUFFIXES bin
+      DOC "The qmake executable for the Qt installation to use"
+    )
+  endif()
 
   set(major 0)
   if (QT_QMAKE_EXECUTABLE)
-- 
2.41.0