From e7c353bf144f23ce010122cb4e9135a56d2e1033 Mon Sep 17 00:00:00 2001
From: Matthias Alleman <matthias.alleman@basalte.be>
Date: Fri, 22 Nov 2024 16:39:29 +0100
Subject: [PATCH] posix: fpu: Fix compiler error when enabling fpu on posix
 boards

Enabling CONFIG_FPU and CONFIG_FPU_SHARING requires the
definition of `arch_float_disable` and `arch_float_enable`.

Signed-off-by: Matthias Alleman <matthias.alleman@basalte.be>
---
 arch/posix/core/thread.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/posix/core/thread.c b/arch/posix/core/thread.c
index 4965f08f6aa..0a3f2eccd74 100644
--- a/arch/posix/core/thread.c
+++ b/arch/posix/core/thread.c
@@ -96,6 +96,25 @@ void posix_arch_thread_entry(void *pa_thread_status)
 	z_thread_entry(ptr->entry_point, ptr->arg1, ptr->arg2, ptr->arg3);
 }
 
+#if defined(CONFIG_FPU) && defined(CONFIG_FPU_SHARING)
+int arch_float_disable(struct k_thread *thread)
+{
+	ARG_UNUSED(thread);
+
+	/* Posix always has FPU enabled so cannot be disabled */
+	return -ENOTSUP;
+}
+
+int arch_float_enable(struct k_thread *thread, unsigned int options)
+{
+	ARG_UNUSED(thread);
+	ARG_UNUSED(options);
+
+	/* Posix always has FPU enabled so nothing to do here */
+	return 0;
+}
+#endif /* CONFIG_FPU && CONFIG_FPU_SHARING */
+
 #if defined(CONFIG_ARCH_HAS_THREAD_ABORT)
 void z_impl_k_thread_abort(k_tid_t thread)
 {