From 2ae4ea3f99a3ac4c31caf89f4c3862cc80c8e829 Mon Sep 17 00:00:00 2001
From: yanghuatao <yanghuatao@xiaomi.com>
Date: Wed, 24 Apr 2024 12:12:55 +0800
Subject: [PATCH] toolchain/ghs: Fix green hills toolchain build Vela link
 error

[elxr] (error #412) unresolved symbols:
 __builtin_signbit     from libc.a(lib_dtoa_engine.o)

Signed-off-by: yanghuatao <yanghuatao@xiaomi.com>
---
 libs/libc/stdio/lib_dtoa_engine.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/libc/stdio/lib_dtoa_engine.c b/libs/libc/stdio/lib_dtoa_engine.c
index 51e9b3902c0..4bc8884f919 100644
--- a/libs/libc/stdio/lib_dtoa_engine.c
+++ b/libs/libc/stdio/lib_dtoa_engine.c
@@ -69,7 +69,7 @@ int __dtoa_engine(double x, FAR struct dtoa_s *dtoa, int max_digits,
   uint8_t flags = 0;
   int i;
 
-  if (__builtin_signbit(x))
+  if (x < 0)
     {
       flags |= DTOA_MINUS;
       x = -x;