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-rw-r--r--libc/sysdeps/linux/common/bits/mathdef.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/common/bits/mathdef.h b/libc/sysdeps/linux/common/bits/mathdef.h
index 1927299f9..00c67241a 100644
--- a/libc/sysdeps/linux/common/bits/mathdef.h
+++ b/libc/sysdeps/linux/common/bits/mathdef.h
@@ -35,3 +35,9 @@ typedef double double_t; /* `double' expressions are evaluated as
# define FP_ILOGBNAN 2147483647
#endif /* ISO C99 */
+
+#ifndef __NO_LONG_DOUBLE_MATH
+/* Signal that we do not really have a `long double'. The disables the
+ declaration of all the `long double' function variants. */
+# define __NO_LONG_DOUBLE_MATH 1
+#endif