diff --git a/Makefile.src.am b/Makefile.src.am
index aee876c..fe4bb62 100644
--- a/Makefile.src.am
+++ b/Makefile.src.am
@@ -112,6 +112,7 @@ libbml_HEADERS = src/lib/bml/bml.h src/lib/bml/BuzzMachineLoader/BuzzMachineLoad
 libbml_la_SOURCES = src/lib/bml/bml.c src/lib/bml/bmllog.c $(DLLWRAPPER_SRC)
 libbml_la_CFLAGS = \
   -I$(srcdir) -I$(top_srcdir)/src/lib \
+  -I$(top_srcdir)/src/lib/dllwrapper \
   $(PTHREAD_CFLAGS) $(BML_CFLAGS)
 libbml_la_CPPFLAGS = -DNATIVE_BML_DIR="\"$(pkglibdir)\""
 libbml_la_LIBADD = $(LIBM) $(PTHREAD_LIBS) $(BML_LIBS) $(DLLWRAPPER_LIB)
@@ -356,7 +357,7 @@ libbuzztrax_core_HEADERS = \
   src/lib/core/wire.h
 
 # -- songio plugins
-songiodir = ${exec_prefix}/lib/buzztrax-songio
+songiodir = ${libdir}/buzztrax-songio
 songio_LTLIBRARIES = libbtbsl.la
 libbtbsl_la_LIBADD = \
   libbuzztrax-core.la \
@@ -760,7 +761,9 @@ BuzztraxIc-@BT_MAJORMINOR@.gir: $(G_IR_SCANNER) libbuzztrax-ic.la
 
 BUILT_GIRSOURCES = BuzztraxCore-@BT_MAJORMINOR@.gir BuzztraxIc-@BT_MAJORMINOR@.gir
 
-girdir = $(datadir)/gir
+# We can't use $(GIRDIR) and $(TYPELIBDIR), since that might using a different
+# prefix
+girdir = $(datadir)/gir-1.0
 gir_DATA = $(BUILT_GIRSOURCES)
 
 typelibsdir = $(libdir)/girepository-1.0
diff --git a/configure.ac b/configure.ac
index cd08e3f..c2181ca 100644
--- a/configure.ac
+++ b/configure.ac
@@ -49,8 +49,15 @@ AC_DEFINE_UNQUOTED(GST_MAJORMINOR, "$GST_MAJORMINOR", [gstreamer series])
 AC_SUBST(GST_MAJORMINOR)
 
 dnl release year and date
-BT_RELEASE_YEAR=`date +%Y`
-BT_RELEASE_DATE=`date +%Y-%m-%d`
+DATE_STAMP=`head -n1 NEWS | sed 's/^[[^(]]*(\(.*\)).*$/\1/'`
+if test "$DATE_STAMP" == "XX.XXX.XXXX"; then
+  BT_RELEASE_YEAR=`date +%Y`
+  BT_RELEASE_DATE=`date +%Y-%m-%d`
+else
+  IFS="." read -r d m y <<< "$DATE_STAMP"
+  BT_RELEASE_YEAR="$y"
+  BT_RELEASE_DATE=`date -d "%d %m %y" +%Y-%m-%d`
+fi
 
 AC_SUBST(BT_MAJOR_VERSION)
 AC_SUBST(BT_MINOR_VERSION)
@@ -62,6 +69,7 @@ AC_SUBST(BT_RELEASE_DATE)
 
 AC_DEFINE_UNQUOTED(BT_VERSION, "$BT_VERSION", [library version as string])
 AC_DEFINE_UNQUOTED(PACKAGE_VERSION_NUMBER, 900, [version as a number])
+AC_DEFINE_UNQUOTED(BT_RELEASE_YEAR, $BT_RELEASE_YEAR, [release year])
 
 dnl Checks for programs.
 AC_PROG_CC
@@ -271,6 +279,9 @@ if test "$enable_dllwrapper" != "no"; then
     enable_dllwrapper="yes"
   fi
 fi
+if test "$enable_dllwrapper" == "no"; then
+  CALLING_MODE=void
+fi
 AC_MSG_RESULT($enable_dllwrapper)
 if test "$enable_dllwrapper" = "yes"; then
   AC_DEFINE(USE_DLLWRAPPER, 1, [Defined if emulation for buzzmachine dlls is enabled])
@@ -530,17 +541,32 @@ AC_CHECK_DECL(sysi86,[
 ])
 
 dnl check for SSE intrisics
+have_sse_intrinsics=no
 ARCH_CFLAGS=""
-ARCH_CPPFLAGS=""
 case "x${target_cpu}" in
   xi?86|k?|xx86_64|xamd64)
-    # seems to cause "CPU you selected does not support x86-64 instruction set" on some targets
-    #ARCH_CFLAGS="-march=native"
-    ARCH_CPPFLAGS="-D__SSE__ -D__MMX__"
-    AC_CHECK_HEADERS([xmmintrin.h])
+    AC_CHECK_HEADERS([xmmintrin.h],
+      [
+        SAVED_CFLAGS="${CFLAGS}"
+        AC_MSG_CHECKING([for working sse intrinsics])
+        CFLAGS="-mmmx -msse"
+        AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+                          #include <xmmintrin.h>
+                          int main () {
+                              _mm_getcsr ();
+                          }]])], [
+                          AC_MSG_RESULT(yes)
+                          have_sse_intrinsics=yes],[
+                          AC_MSG_RESULT(no)])
+        CFLAGS="${SAVED_CFLAGS}"
+        ARCH_CFLAGS="-mmmx -msse"
+      ],[])
     ;;
 esac
-
+if test $have_sse_intrinsics = yes ; then
+   AC_DEFINE(USE_X86_SSE, 1, [use x86 SSE compiler intrinsics])
+   ARCH_CFLAGS="-mmmx -msse"
+fi
 
 dnl check for libraries
 LT_LIB_M
@@ -585,7 +611,7 @@ AC_ARG_ENABLE(Bsymbolic,
 dnl Extra vars
 BT_INCLUDEDIR='-I${includedir}'
 dnl -Wl,--as-needed # can be put into CFLAGS to drop all unused libs
-BT_CFLAGS="$ARCH_CFLAGS $ARCH_CPPFLAGS $DEBUG_CFLAGS $COVERAGE_CFLAGS $BT_DISABLE_DEPRECATED"
+BT_CFLAGS="$ARCH_CFLAGS $DEBUG_CFLAGS $COVERAGE_CFLAGS $BT_DISABLE_DEPRECATED"
 BT_LIBDIR='-L${libdir}'
 BT_LIBS="$COVERAGE_LIBS"
 BT_LDFLAGS="$DEBUG_LDFLAGS"
diff --git a/src/lib/core/core.c b/src/lib/core/core.c
index 6a03d5e..3742cb5 100644
--- a/src/lib/core/core.c
+++ b/src/lib/core/core.c
@@ -32,14 +32,16 @@
 
 #ifdef HAVE_SCHED_SETSCHEDULER
 #include <sched.h>
-#if HAVE_MLOCKALL
+#ifdef HAVE_MLOCKALL
 #include <sys/mman.h>
 #endif
 #endif
 
-#if HAVE_XMMINTRIN_H
+#ifdef USE_X86_SSE
+#ifdef HAVE_XMMINTRIN_H
 #include <xmmintrin.h>
 #endif
+#endif
 
 /**
  * bt_major_version:
@@ -145,11 +147,13 @@ bt_init_post (void)
 #endif
 #endif
 
-#if HAVE_XMMINTRIN_H
+#if USE_X86_SSE
   // TODO(ensonic): we need to probe the CPU capabilities
   // see http://www.mail-archive.com/linux-audio-dev@music.columbia.edu/msg19520.html
   //   [linux-audio-dev] Channels and best practice
   // _MM_FLUSH_ZERO_ON = FZ
+  // TODO(ensonic): wikipedia says we must do this for each thread:
+  // https://en.wikipedia.org/wiki/Denormal_number#Disabling_denormal_floats_at_the_code_level
   _mm_setcsr (_mm_getcsr () | 0x8040);  // set DAZ and FZ bits
 #endif
 
diff --git a/src/ui/edit/about-dialog.c b/src/ui/edit/about-dialog.c
index d2ff4bc..a85bf31 100644
--- a/src/ui/edit/about-dialog.c
+++ b/src/ui/edit/about-dialog.c
@@ -68,7 +68,7 @@ bt_about_dialog_init_ui (const BtAboutDialog * self)
       g_alloca (strlen (_("Copyright \xc2\xa9 2003-%d Buzztrax developer team"))
       + 3);
   sprintf (copyright, _("Copyright \xc2\xa9 2003-%d Buzztrax developer team"),
-      2014);
+      BT_RELEASE_YEAR);
 
   /* we can get logo via icon name, so this here is just for educational purpose
      GdkPixbuf *logo;