From: Yury G. Kudryashov <urkud.urkud@gmail.com>
Subject: [PATCH] Find virtuoso if virtuoso-t is in PATH

---
 backends/virtuoso/virtuosobackend.cpp |   31 ++++++++++++++++++++++---------
 backends/virtuoso/virtuosobackend.h   |    2 +-
 2 files changed, 23 insertions(+), 10 deletions(-)

diff --git a/backends/virtuoso/virtuosobackend.cpp b/backends/virtuoso/virtuosobackend.cpp
index c83605d..8c30c81 100644
--- a/backends/virtuoso/virtuosobackend.cpp
+++ b/backends/virtuoso/virtuosobackend.cpp
@@ -27,6 +27,7 @@
 #include "odbcconnectionpool.h"
 
 #include "sopranodirs.h"
+#include "soprano-config.h"
 
 #include <QtCore/QDebug>
 #include <QtCore/QtPlugin>
@@ -188,19 +189,19 @@ namespace {
 
 bool Soprano::Virtuoso::BackendPlugin::isAvailable() const
 {
-#ifndef Q_OS_WIN
-    if ( findVirtuosoDriver().isEmpty() ) {
-        qDebug() << Q_FUNC_INFO << "could not find Virtuoso ODBC driver";
-        return false;
-    }
-#endif
-
     QString virtuosoBin = VirtuosoController::locateVirtuosoBinary();
     if ( virtuosoBin.isEmpty() ) {
         qDebug() << Q_FUNC_INFO << "could not find virtuoso-t binary";
         return false;
     }
 
+#ifndef Q_OS_WIN
+    if ( findVirtuosoDriver(virtuosoBin).isEmpty() ) {
+        qDebug() << Q_FUNC_INFO << "could not find Virtuoso ODBC driver";
+        return false;
+    }
+#endif
+
     QString vs = determineVirtuosoVersion( virtuosoBin );
     if ( vs.isEmpty() ) {
         qDebug() << Q_FUNC_INFO << "Failed to determine version of the Virtuoso server at" << virtuosoBin;
@@ -217,9 +218,21 @@ bool Soprano::Virtuoso::BackendPlugin::isAvailable() const
 
 
 #ifndef Q_OS_WIN
-QString Soprano::Virtuoso::BackendPlugin::findVirtuosoDriver() const
+QString Soprano::Virtuoso::BackendPlugin::findVirtuosoDriver( const QString &virtuosoBinHint ) const
 {
-    return Soprano::findLibraryPath( "virtodbc_r", QStringList(), QStringList() << QLatin1String( "virtuoso/plugins/" ) << QLatin1String( "odbc/" ) );
+    QString virtuosoBin;
+    if (virtuosoBinHint.isEmpty())
+        virtuosoBin = VirtuosoController::locateVirtuosoBinary();
+    else
+        virtuosoBin = virtuosoBinHint;
+
+    QDir virtuosoBinDir = QFileInfo(virtuosoBin).absoluteDir();
+    return Soprano::findLibraryPath( "virtodbc_r",
+            QStringList()
+			<< virtuosoBinDir.absoluteFilePath("../lib"SOPRANO_LIB_SUFFIX)
+			<< virtuosoBinDir.absoluteFilePath("../lib"),
+            QStringList() << QLatin1String( "virtuoso/plugins/" ) <<
+            QLatin1String( "odbc/" ) );
 }
 #endif
 
diff --git a/backends/virtuoso/virtuosobackend.h b/backends/virtuoso/virtuosobackend.h
index 3971b83..0807e5d 100644
--- a/backends/virtuoso/virtuosobackend.h
+++ b/backends/virtuoso/virtuosobackend.h
@@ -50,7 +50,7 @@ namespace Soprano {
 
 #ifndef Q_OS_WIN
         private:
-            QString findVirtuosoDriver() const;
+            QString findVirtuosoDriver(const QString &virtuosoBinHint = QString()) const;
 #endif
         };
     }
-- 
tg: (da390be..) t/find-virtuoso (depends on: master)