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-rw-r--r--features.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/features.h b/features.h
index a14179b..c38480e 100644
--- a/features.h
+++ b/features.h
@@ -188,6 +188,9 @@
#define __USE_REENTRANT 1
#endif
+/* We do support the IEC 559 math functionality, real and complex. */
+#define __STDC_IEC_559__ 1
+#define __STDC_IEC_559_COMPLEX__ 1
/* This macro indicates that the installed library is the GNU C Library.
For historic reasons the value now is 6 and this will stay from now