[dynarmic] force-disable perfmap on non-platforms (#3031)

removes some annoying generated stubs with just a `retq`...

Signed-off-by: lizzie lizzie@eden-emu.dev

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3031
Reviewed-by: Caio Oliveira <caiooliveirafarias0@gmail.com>
Reviewed-by: crueter <crueter@eden-emu.dev>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

src/dynarmic/src/dynarmic/backend/x64/perf_map.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 /* This file is part of the dynarmic project.
  * Copyright (c) 2018 MerryMage
  * SPDX-License-Identifier: 0BSD
@@ -8,12 +11,10 @@
 #include <cstddef>
 #include <string>
 
-#ifdef __linux__
-
+#if defined(__linux__) && !defined(__ANDROID__)
 #    include <cstdio>
 #    include <cstdlib>
 #    include <mutex>
-
 #    include <fmt/format.h>
 #    include <mcl/stdint.hpp>
 #    include <sys/types.h>
@@ -79,16 +80,4 @@ void PerfMapClear() {
 
 }  // namespace Dynarmic::Backend::X64
 
-#else
-
-namespace Dynarmic::Backend::X64 {
-
-namespace detail {
-void PerfMapRegister(const void*, const void*, std::string_view) {}
-}  // namespace detail
-
-void PerfMapClear() {}
-
-}  // namespace Dynarmic::Backend::X64
-
 #endif

src/dynarmic/src/dynarmic/backend/x64/perf_map.h

@@ -14,15 +14,19 @@
 
 namespace Dynarmic::Backend::X64 {
 
+#if defined(__linux__) && !defined(__ANDROID__)
 namespace detail {
 void PerfMapRegister(const void* start, const void* end, std::string_view friendly_name);
 }  // namespace detail
-
 template<typename T>
-void PerfMapRegister(T start, const void* end, std::string_view friendly_name) {
+void PerfMapRegister(T start, const void* end, std::string_view friendly_name) noexcept {
     detail::PerfMapRegister(std::bit_cast<const void*>(start), end, friendly_name);
 }
-
 void PerfMapClear();
+#else
+// Resolve to no-op (compiler thinks fmt has side effects)
+template<typename T> inline void PerfMapRegister(T, const void*, std::string_view) noexcept {}
+inline void PerfMapClear() noexcept {}
+#endif
 
 }  // namespace Dynarmic::Backend::X64