1 files changed, 10 insertions, 0 deletions
diff --git a/include/fenv.h b/include/fenv.h
index ed6d1394ba..9f90d17090 100644
--- a/include/fenv.h
+++ b/include/fenv.h
@@ -1,5 +1,6 @@
 #ifndef _FENV_H
 #include <math/fenv.h>
+#include <stdbool.h>
 
 #ifndef _ISOMAC
 /* Now define the internal interfaces.  */
@@ -23,4 +24,13 @@ libm_hidden_proto (fetestexcept)
 libm_hidden_proto (feclearexcept)
 #endif
 
+/* Rounding mode context.  This allows functions to set/restore rounding mode
+   only when the desired rounding mode is different from the current rounding
+   mode.  */
+struct rm_ctx
+{
+  fenv_t env;
+  bool updated_status;
+};
+
 #endif