diff --git a/boost.pri b/boost.pri
index daa6b1df..61ebd5e2 100644
--- a/boost.pri
+++ b/boost.pri
@@ -19,7 +19,7 @@ boost {
   } 
 
   isEmpty(BOOST_LINK_FLAGS):win* {
-    BOOST_LINK_FLAGS = -llibboost_thread-vc90-mt-s-1_46_1 -llibboost_program_options-vc90-mt-s-1_46_1 -llibboost_filesystem-vc90-mt-s-1_46_1 -llibboost_system-vc90-mt-s-1_46_1 -llibboost_regex-vc90-mt-s-1_46_1
+    BOOST_LINK_FLAGS = -lboost_thread-mt -lboost_program_options-mt -lboost_filesystem-mt -lboost_system-mt -lboost_regex-mt
   } 
 
   # check for OPENSCAD_LIBDIR + multithread
diff --git a/cgal.pri b/cgal.pri
index e61b6def..355cf010 100644
--- a/cgal.pri
+++ b/cgal.pri
@@ -6,7 +6,6 @@ cgal {
   CGAL_DIR = $$(CGALDIR)
   !isEmpty(CGAL_DIR) {
     QMAKE_INCDIR += $$CGAL_DIR/include
-    win*: QMAKE_INCDIR += $$CGAL_DIR/auxiliary/gmp/include
     QMAKE_LIBDIR += $$CGAL_DIR/lib
     message("CGAL location: $$CGAL_DIR")
   }
@@ -19,14 +18,13 @@ cgal {
       *-g++* { 
         QMAKE_CXXFLAGS += -frounding-math 
       }
-      LIBS += $$CGAL_DIR/auxiliary/gmp/lib/libmpfr-4.lib -lCGAL-vc110-mt-gd
     } else {
-      LIBS += -lgmp -lmpfr -lCGAL
       QMAKE_CXXFLAGS += -frounding-math 
     }
+    LIBS += -lCGAL -lmpfr -lgmp
   }
 
-	*clang* {
-		QMAKE_CXXFLAGS -= -frounding-math
-	}
+  *clang* {
+    QMAKE_CXXFLAGS -= -frounding-math
+  }
 }
diff --git a/glew.pri b/glew.pri
index 9898af59..1bd3236e 100644
--- a/glew.pri
+++ b/glew.pri
@@ -9,6 +9,9 @@ glew {
   }
 
   unix:LIBS += -lGLEW
-  win32:LIBS += -lglew32s
-  CONFIG(mingw-cross-env):DEFINES += GLEW_STATIC
+  CONFIG(mingw-cross-env): {
+    DEFINES += GLEW_STATIC
+  } else {
+    win32:LIBS += -lglew32
+  }
 }
diff --git a/openscad.pro b/openscad.pro
index ff90be45..cc2b4a58 100644
--- a/openscad.pro
+++ b/openscad.pro
@@ -119,6 +119,13 @@ win* {
   QMAKE_CXXFLAGS += -DNOGDI
 }
 
+mingw* {
+  # needed to prevent compilation error on MSYS2:
+  # as.exe: objects/cgalutils.o: too many sections (76541)
+  QMAKE_CXXFLAGS += -Wa,-mbig-obj
+  debug: QMAKE_CXXFLAGS += -O1
+}
+
 CONFIG += qt
 QT += opengl