Index: configure
===================================================================
--- configure	(revision ac93b2287119108108d39026a0f27c1c260ea646)
+++ configure	(revision c3ebf37c145f74649af817e1dc7738d68ae60429)
@@ -658,4 +658,6 @@
 CFA_INCDIR
 CFA_PREFIX
+BUILD_CONCURRENCY_FALSE
+BUILD_CONCURRENCY_TRUE
 BUILD_NO_LIB_FALSE
 BUILD_NO_LIB_TRUE
@@ -742,4 +744,5 @@
 enable_target_release
 enable_target_debug
+enable_threading
 enable_dependency_tracking
 '
@@ -1386,4 +1389,6 @@
   --enable-target-release Build and install the release target
   --enable-target-debug   Build and install the debug target
+  --enable-threading      Build and install libcfa with threading support
+                          (Enabled by default)
   --disable-dependency-tracking  speeds up one-time build
   --enable-dependency-tracking   do not reject slow dependency extractors
@@ -3123,4 +3128,15 @@
 fi
 
+# Check whether --enable-threading was given.
+if test "${enable_threading+set}" = set; then :
+  enableval=$enable_threading; case "${enableval}" in
+  yes) build_threading-"yes" ;;
+  no)  build_threading="no" ;;
+  *) as_fn_error $? "bad value ${enableval} for --enable-debug" "$LINENO" 5 ;;
+esac
+else
+  build_threading="yes"
+fi
+
 
 case "$enable_target_release" in
@@ -3197,4 +3213,12 @@
   BUILD_NO_LIB_TRUE='#'
   BUILD_NO_LIB_FALSE=
+fi
+
+ if test "x$build_threading" = "xyes"; then
+  BUILD_CONCURRENCY_TRUE=
+  BUILD_CONCURRENCY_FALSE='#'
+else
+  BUILD_CONCURRENCY_TRUE='#'
+  BUILD_CONCURRENCY_FALSE=
 fi
 
@@ -6318,4 +6342,8 @@
 if test -z "${BUILD_NO_LIB_TRUE}" && test -z "${BUILD_NO_LIB_FALSE}"; then
   as_fn_error $? "conditional \"BUILD_NO_LIB\" was never defined.
+Usually this means the macro was only invoked conditionally." "$LINENO" 5
+fi
+if test -z "${BUILD_CONCURRENCY_TRUE}" && test -z "${BUILD_CONCURRENCY_FALSE}"; then
+  as_fn_error $? "conditional \"BUILD_CONCURRENCY\" was never defined.
 Usually this means the macro was only invoked conditionally." "$LINENO" 5
 fi