1 files changed, 9 insertions, 6 deletions
diff --git a/eigen2.pri b/eigen2.pri
index 8b955e3..3d7017b 100644
--- a/eigen2.pri
+++ b/eigen2.pri
@@ -3,19 +3,22 @@ eigen2 {
   # EIGEN2DIR env. variable
   EIGEN2_DIR = $$(EIGEN2DIR)
   !isEmpty(EIGEN2_DIR) {
-    INCLUDEPATH += $$EIGEN2_DIR
+    EIGEN2_INCLUDEPATH = $$EIGEN2_DIR
   }
   else {
     CONFIG(mingw-cross-env) {
-      INCLUDEPATH += mingw-cross-env/include/eigen2
+      EIGEN2_INCLUDEPATH = mingw-cross-env/include/eigen2
     } else {
-      freebsd-g++: INCLUDEPATH += /usr/local/include/eigen2
-      macx: INCLUDEPATH += /opt/local/include/eigen2
-      !macx:!freebsd-g++:INCLUDEPATH += /usr/include/eigen2
+      freebsd-g++: EIGEN2_INCLUDEPATH *= /usr/local/include/eigen2
+      macx: EIGEN2_INCLUDEPATH *= /opt/local/include/eigen2
+      !macx:!freebsd-g++:EIGEN2_INCLUDEPATH *= /usr/include/eigen2
     }
   }
 
-  # disable Eigen SIMD optimizations for non-Mac OSX
+  # eigen2 being under 'include/eigen2' needs special prepending
+  QMAKE_INCDIR_QT = $$EIGEN2_INCLUDEPATH $$QMAKE_INCDIR_QT
+
+  # disable Eigen SIMD optimizations for platforms where it breaks compilation
   !macx {
     !freebsd-g++ {
       QMAKE_CXXFLAGS += -DEIGEN_DONT_ALIGN