[uclibc-ng-devel] [PATCH] nan.h: define NAN only if not already defined

From: Frank Mehnert frank.mehnert@kernkonzept.com

Clang-19 defines NAN in <float.h>. Check if NAN is already defined to prevent a compiler warning.

Change-Id: I29ebcb2a7a0c1eade46a73074a1701ea67869128 Signed-off-by: Marcus Haehnel marcus.haehnel@kernkonzept.com --- libc/sysdeps/linux/common/bits/nan.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libc/sysdeps/linux/common/bits/nan.h b/libc/sysdeps/linux/common/bits/nan.h index 00cb405f1..46cfb613f 100644 --- a/libc/sysdeps/linux/common/bits/nan.h +++ b/libc/sysdeps/linux/common/bits/nan.h @@ -25,7 +25,9 @@

#if __GNUC_PREREQ(3,3)

-# define NAN (__builtin_nanf ("")) +# ifndef NAN +# define NAN (__builtin_nanf ("")) +# endif

#elif defined __GNUC__