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-rw-r--r--ChangeLog8
-rw-r--r--bits/libc-header-start.h9
-rw-r--r--include/features.h2
-rw-r--r--manual/creature.texi9
4 files changed, 28 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 6adf580e7b..9f6a60c3f5 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,6 +1,14 @@
 2017-05-09  Paul E. Murphy  <murphyp@linux.vnet.ibm.com>
 	    Gabriel F. T. Gomes  <gftg@linux.vnet.ibm.com>
 
+	* bits/libc-header-start.h:
+	(__GLIBC_USE_IEC_60559_TYPES_EXT): New macro.
+	* include/features.h: Describe __STDC_WANT_IEC_60559_TYPES_EXT__.
+	* manual/creature.texi: Likewise.
+
+2017-05-09  Paul E. Murphy  <murphyp@linux.vnet.ibm.com>
+	    Gabriel F. T. Gomes  <gftg@linux.vnet.ibm.com>
+
 	* math/Makefile:
 	(type-float128-suffix): New variable
 	(type-float128-routines): Likewise
diff --git a/bits/libc-header-start.h b/bits/libc-header-start.h
index 860225d7ca..0ce16e2532 100644
--- a/bits/libc-header-start.h
+++ b/bits/libc-header-start.h
@@ -59,3 +59,12 @@
 #else
 # define __GLIBC_USE_IEC_60559_FUNCS_EXT 0
 #endif
+
+/* ISO/IEC TS 18661-3:2015 defines the
+   __STDC_WANT_IEC_60559_TYPES_EXT__ macro.  */
+#undef __GLIBC_USE_IEC_60559_TYPES_EXT
+#if defined __USE_GNU || defined __STDC_WANT_IEC_60559_TYPES_EXT__
+# define __GLIBC_USE_IEC_60559_TYPES_EXT 1
+#else
+# define __GLIBC_USE_IEC_60559_TYPES_EXT 0
+#endif
diff --git a/include/features.h b/include/features.h
index 7de4089ed3..972cbd2b5d 100644
--- a/include/features.h
+++ b/include/features.h
@@ -30,6 +30,8 @@
 			Extensions to ISO C11 from TS 18661-1:2014.
    __STDC_WANT_IEC_60559_FUNCS_EXT__
 			Extensions to ISO C11 from TS 18661-4:2015.
+   __STDC_WANT_IEC_60559_TYPES_EXT__
+			Extensions to ISO C11 from TS 18661-3:2015.
 
    _POSIX_SOURCE	IEEE Std 1003.1.
    _POSIX_C_SOURCE	If ==1, like _POSIX_SOURCE; if >=2 add IEEE Std 1003.2;
diff --git a/manual/creature.texi b/manual/creature.texi
index 5048886292..23218bbac3 100644
--- a/manual/creature.texi
+++ b/manual/creature.texi
@@ -192,6 +192,15 @@ enabled.  Only some of the features from this TS are supported by
 @end defvr
 
 @comment (none)
+@comment ISO
+@defvr Macro __STDC_WANT_IEC_60559_TYPES_EXT__
+If you define this macro, features from ISO/IEC TS 18661-3:2015
+(Floating-point extensions for C: Interchange and extended types) are
+enabled.  Only some of the features from this TS are supported by
+@theglibc{}.
+@end defvr
+
+@comment (none)
 @comment GNU
 @defvr Macro _GNU_SOURCE
 If you define this macro, everything is included: @w{ISO C89}, @w{ISO