Index: ADOL-C/src/config.h.in
===================================================================
--- ADOL-C/src/config.h.in	(revision 47)
+++ ADOL-C/src/config.h.in	(working copy)
@@ -116,6 +116,9 @@
 /* Define to the version of this package. */
 #undef PACKAGE_VERSION
 
+/* Define if ISO C++ TR1 header files are present. */
+#undef STDCXX_TR1_HEADERS
+
 /* Define to 1 if you have the ANSI C header files. */
 #undef STDC_HEADERS
 
Index: ADOL-C/src/adouble.h
===================================================================
--- ADOL-C/src/adouble.h	(revision 47)
+++ ADOL-C/src/adouble.h	(working copy)
@@ -36,6 +36,15 @@
 
 #include <common.h>
 
+#ifdef STDCXX_TR1_HEADERS
+#include <tr1/cmath>
+namespace adolc_math
+{
+  using namespace std;
+  using namespace std::tr1;
+};
+#endif
+
 /* NOTICE: There are automatic includes at the end of this file! */
 
 #undef TAPELESS
Index: ADOL-C/src/usrparms.h
===================================================================
--- ADOL-C/src/usrparms.h	(revision 47)
+++ ADOL-C/src/usrparms.h	(working copy)
@@ -53,8 +53,7 @@
 
 /*--------------------------------------------------------------------------*/
 /* Enable/disable asinh, acosh,atanh, erf */
-#undef ATRIG_ERF
-/* #define ATRIG_ERF 1 */
+#define ATRIG_ERF 1
 
 /****************************************************************************/
 /* Standard output used for diagnostics by ADOL-C,                          */
Index: ADOL-C/src/dvlparms.h
===================================================================
--- ADOL-C/src/dvlparms.h	(revision 47)
+++ ADOL-C/src/dvlparms.h	(working copy)
@@ -27,7 +27,11 @@
 
 /****************************************************************************/
 /* Tells ADOL-C which name space offers the mathematical functions          */
+#ifdef STDCXX_TR1_HEADERS
+#define ADOLC_MATH_NSP adolc_math
+#else
 #define ADOLC_MATH_NSP std
+#endif
 
 /*--------------------------------------------------------------------------*/
 /* TAPE IDENTIFICATION (ADOLC & version check) */
Index: configure.ac
===================================================================
--- configure.ac	(revision 47)
+++ configure.ac	(working copy)
@@ -62,6 +62,9 @@
 AC_FUNC_REALLOC
 AC_CHECK_FUNCS([floor ftime pow sqrt strchr strtol])
 
+m4_include([autoconf/ac_cxx_header_stdcxx_tr1.m4])
+AC_CXX_HEADER_STDCXX_TR1()
+
 # substitutions
 AC_SUBST(ac_aux_dir)