# --- T2-COPYRIGHT-BEGIN ---
# t2/package/*/thunderbird/hotfix-tailcalls.patch
# Copyright (C) 2025 - 2026 The T2 SDE Project
# SPDX-License-Identifier: GPL-2.0 or patched project license
# --- T2-COPYRIGHT-END ---

10:10.66 /srv/t2/src.firefox.i686-desktop.260301.111047.4950/firefox-148.0/gfx/skia/skia/modules/skcms/src/Transform_inl.h:818:
71: error: cannot tail-call: tail call production failed

--- firefox-148.0/gfx/skia/skia/src/core/SkRasterPipeline.h.vanilla	2026-03-01 13:47:48.488465780 +0100
+++ firefox-148.0/gfx/skia/skia/src/core/SkRasterPipeline.h	2026-03-01 14:01:01.086399454 +0100
@@ -27,7 +27,7 @@
 struct skcms_TransferFunction;
 
 #if __has_cpp_attribute(clang::musttail) && !defined(__EMSCRIPTEN__) && !defined(SK_CPU_ARM32) && \
-        !defined(SK_CPU_LOONGARCH) && !defined(SK_CPU_PPC) && !defined(__sparc) && \
+        !defined(SK_CPU_LOONGARCH) && !defined(SK_CPU_PPC) && !defined(__sparc) && !defined(__i386) && \
         !(defined(_WIN32) && defined(SK_BUILD_FOR_ANDROID_FRAMEWORK)) && \
         !(defined(_WIN32) && defined(__GNUC__))
     // [[clang::musttail]] is disabled for the Android version of Skia running on Windows as it
--- firefox-148.0/toolkit/components/protobuf/src/google/protobuf/port_def.inc.vanilla	2026-03-01 13:47:48.492967914 +0100
+++ firefox-148.0/toolkit/components/protobuf/src/google/protobuf/port_def.inc	2026-03-01 13:54:56.778379948 +0100
@@ -254,8 +254,8 @@
 #ifdef PROTOBUF_TAILCALL
 #error PROTOBUF_TAILCALL was previously defined
 #endif
-#if __has_cpp_attribute(clang::musttail) && !defined(__arm__) && \
-    !defined(_ARCH_PPC) && !defined(__wasm__) &&                 \
+#if __has_cpp_attribute(clang::musttail) && !defined(__arm__) && !defined(__i386) && \
+    !defined(_ARCH_PPC) && !defined(__sparc__) && !defined(__wasm__) && !defined(__s390__) && \
     !(defined(_MSC_VER) && defined(_M_IX86)) &&                  \
     !(defined(__NDK_MAJOR__) && __NDK_MAJOR <= 24)
 #  ifndef PROTO2_OPENSOURCE
--- firefox-148.0/gfx/skia/skia/modules/skcms/src/skcms_internals.h.vanilla	2026-03-01 14:20:21.657205603 +0100
+++ firefox-148.0/gfx/skia/skia/modules/skcms/src/skcms_internals.h	2026-03-01 14:23:54.268174198 +0100
@@ -53,13 +53,15 @@
                                                  && !defined(__riscv) \
                                                  && !defined(__powerpc__) \
                                                  && !defined(__loongarch__) \
+                                                 && !defined(__sparc) \
+                                                 && !defined(__i386) \
                                                  && !defined(_WIN32) && !defined(__SYMBIAN32__)
             #define SKCMS_HAS_MUSTTAIL 1
         #endif
     #elif defined(__GNUC__) && !defined(SKCMS_HAS_MUSTTAIL)
         // GCC on riscv64 does not support our tail call functions
         // cf. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121784
-        #if __has_cpp_attribute(clang::musttail) && !defined(__riscv)
+        #if __has_cpp_attribute(clang::musttail) && !defined(__riscv) && !defined(__i386) && !defined(__sparc)
             #define SKCMS_HAS_MUSTTAIL 1
         #else
             #define SKCMS_HAS_MUSTTAIL 0