From 8bd2be012e6cb669940a09f1bd539e1a8cb929b8 Mon Sep 17 00:00:00 2001
From: Aaron Sierra <aaron@bubbl-tek.com>
Date: Wed, 16 Jul 2025 13:56:25 -0500
Subject: [PATCH] package/xinetd: fix build with musl

The ecvt(), fcvt(), and gcvt() functions from stdlib.h, used by the SIO
library packaged with the xinetd sources, are masked by _GNU_SOURCE in
musl libc.

Signed-off-by: Aaron Sierra <aaron@bubbl-tek.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 2982fac48ede2c14e86df670fc4e44399d0a3f69)
Signed-off-by: Thomas Perale <thomas.perale@mind.be>
---
 package/xinetd/xinetd.mk | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/package/xinetd/xinetd.mk b/package/xinetd/xinetd.mk
index f58c26f02a..f63a8a2251 100644
--- a/package/xinetd/xinetd.mk
+++ b/package/xinetd/xinetd.mk
@@ -29,6 +29,11 @@ else ifeq ($(BR2_TOOLCHAIN_HAS_NATIVE_RPC),)
 XINETD_CFLAGS += -DNO_RPC
 endif
 
+ifeq ($(BR2_TOOLCHAIN_USES_MUSL),y)
+# Make ecvt(), fcvt(), and gcvt() available for SIO library
+XINETD_CFLAGS += -D_GNU_SOURCE
+endif
+
 XINETD_CONF_ENV += \
 	CFLAGS="$(XINETD_CFLAGS)" \
 	LIBS="$(XINETD_LIBS)"