From f74476803dd5d644a32653b160c4c41060b6ede2 Mon Sep 17 00:00:00 2001
From: "Dirk O. Kaar" <dok@dok-net.net>
Date: Sun, 2 Jul 2023 11:14:14 +0200
Subject: [PATCH] The gcc in IDF 5.1 appears to have fixed the attribute bug
 affecting IRAM_ATTR.

---
 src/SoftwareSerial.cpp | 2 ++
 src/SoftwareSerial.h   | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/src/SoftwareSerial.cpp b/src/SoftwareSerial.cpp
index 163e3a3..61461d2 100644
--- a/src/SoftwareSerial.cpp
+++ b/src/SoftwareSerial.cpp
@@ -606,6 +606,7 @@ void UARTBase::onReceive(Delegate<void(), void*>&& handler) {
     restoreInterrupts();
 }
 
+#if __GNUC__ < 12
 // The template member functions below must be in IRAM, but due to a bug GCC doesn't currently
 // honor the attribute. Instead, it is possible to do explicit specialization and adorn
 // these with the IRAM attribute:
@@ -616,4 +617,5 @@ template void IRAM_ATTR delegate::detail::DelegateImpl<void*, void>::operator()(
 template size_t IRAM_ATTR circular_queue<uint32_t, UARTBase*>::available() const;
 template bool IRAM_ATTR circular_queue<uint32_t, UARTBase*>::push(uint32_t&&);
 template bool IRAM_ATTR circular_queue<uint32_t, UARTBase*>::push(const uint32_t&);
+#endif // __GNUC__ < 12
 
diff --git a/src/SoftwareSerial.h b/src/SoftwareSerial.h
index 9139e2b..13a11b1 100644
--- a/src/SoftwareSerial.h
+++ b/src/SoftwareSerial.h
@@ -432,6 +432,7 @@ using UART = BasicUART< GpioCapabilities >;
 using SoftwareSerial = EspSoftwareSerial::UART;
 using namespace EspSoftwareSerial;
 
+#if __GNUC__ < 12
 // The template member functions below must be in IRAM, but due to a bug GCC doesn't currently
 // honor the attribute. Instead, it is possible to do explicit specialization and adorn
 // these with the IRAM attribute:
@@ -442,6 +443,7 @@ extern template void delegate::detail::DelegateImpl<void*, void>::operator()() c
 extern template size_t circular_queue<uint32_t, EspSoftwareSerial::UARTBase*>::available() const;
 extern template bool circular_queue<uint32_t, EspSoftwareSerial::UARTBase*>::push(uint32_t&&);
 extern template bool circular_queue<uint32_t, EspSoftwareSerial::UARTBase*>::push(const uint32_t&);
+#endif // __GNUC__ < 12
 
 #endif // __SoftwareSerial_h