+/* Define if C99 functions or macros in <math.h> should be imported in
+ <tr1/cmath> in namespace std::tr1. */
+#undef _GLIBCXX_USE_C99_MATH_TR1
+
+/* Define if C99 types in <stdint.h> should be imported in <tr1/cstdint> in
+ namespace std::tr1. */
+#undef _GLIBCXX_USE_C99_STDINT_TR1
+
+/* Defined if clock_gettime has monotonic clock support. */
+#undef _GLIBCXX_USE_CLOCK_MONOTONIC
+
+/* Defined if clock_gettime has realtime clock support. */
+#undef _GLIBCXX_USE_CLOCK_REALTIME
+
+/* Define if ISO/IEC TR 24733 decimal floating point types are supported on
+ this host. */
+#undef _GLIBCXX_USE_DECIMAL_FLOAT
+
+/* Define if __float128 is supported on this host. */
+#undef _GLIBCXX_USE_FLOAT128
+
+/* Defined if gettimeofday is available. */
+#undef _GLIBCXX_USE_GETTIMEOFDAY
+
+/* Define if get_nprocs is available in <sys/sysinfo.h>. */
+#undef _GLIBCXX_USE_GET_NPROCS
+
+/* Define if __int128 is supported on this host. */
+#undef _GLIBCXX_USE_INT128