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-rw-r--r--libstdc++-v3/config.h.in4
1 files changed, 4 insertions, 0 deletions
diff --git a/libstdc++-v3/config.h.in b/libstdc++-v3/config.h.in
index d940e6189c7..61840a5628b 100644
--- a/libstdc++-v3/config.h.in
+++ b/libstdc++-v3/config.h.in
@@ -715,6 +715,10 @@
in namespace std. */
#undef _GLIBCXX_USE_C99_MATH
+/* 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
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