rewrite default spec handling

instead of symlinking (on unix) or creating a forwarding spec (on
windows), just put the default specs into (the bootstrapped)
QLibraryInfo.

Change-Id: I595500ef7399f77cb8ec117c4303bc0a2ffe505f
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from qtbase/7d20f3dd1065a20b40cb4689783fba05190fe317)

1 files changed, 11 insertions, 3 deletions

diff --git a/src/linguist/shared/qmakeevaluator.cpp b/src/linguist/shared/qmakeevaluator.cpp
index f598cd03b..486ce4c49 100644
--- a/src/linguist/shared/qmakeevaluator.cpp
+++ b/src/linguist/shared/qmakeevaluator.cpp
@@ -1112,20 +1112,23 @@ bool QMakeEvaluator::loadSpecInternal()
         evalError(fL1S("Could not read qmake configuration file %1.").arg(spec));
         return false;
     }
-#ifdef Q_OS_UNIX
+#ifndef QT_BUILD_QMAKE
+    // Legacy support for Qt4 default specs
+#  ifdef Q_OS_UNIX
     if (m_qmakespec.endsWith(QLatin1String("/default-host"))
         || m_qmakespec.endsWith(QLatin1String("/default"))) {
         QString rspec = QFileInfo(m_qmakespec).readLink();
         if (!rspec.isEmpty())
             m_qmakespec = QDir::cleanPath(QDir(m_qmakespec).absoluteFilePath(rspec));
     }
-#else
+#  else
     // We can't resolve symlinks as they do on Unix, so configure.exe puts
     // the source of the qmake.conf at the end of the default/qmake.conf in
     // the QMAKESPEC_ORIGINAL variable.
     const ProString &orig_spec = first(ProKey("QMAKESPEC_ORIGINAL"));
     if (!orig_spec.isEmpty())
         m_qmakespec = orig_spec.toQString();
+#  endif
 #endif
     valuesRef(ProKey("QMAKESPEC")) << ProString(m_qmakespec);
     m_qmakespecName = IoUtils::fileName(m_qmakespec).toString();
@@ -1170,7 +1173,12 @@ bool QMakeEvaluator::loadSpec()
 
     updateMkspecPaths();
     if (qmakespec.isEmpty())
-        qmakespec = m_hostBuild ? QLatin1String("default-host") : QLatin1String("default");
+        qmakespec = propertyValue(ProKey(m_hostBuild ? "QMAKE_SPEC" : "QMAKE_XSPEC")).toQString();
+#ifndef QT_BUILD_QMAKE
+    // Legacy support for Qt4 qmake in Qt Creator, etc.
+    if (qmakespec.isEmpty())
+        qmakespec = QLatin1String("default-host") : QLatin1String("default");
+#endif
     if (IoUtils::isRelativePath(qmakespec)) {
         foreach (const QString &root, m_mkspecPaths) {
             QString mkspec = root + QLatin1Char('/') + qmakespec;