# --- T2-COPYRIGHT-BEGIN ---
# t2/package/*/firefox/hotfix-ia64-nspr-atomics.patch
# Copyright (C) 2026 The T2 SDE Project
# SPDX-License-Identifier: GPL-2.0 or patched project license
# --- T2-COPYRIGHT-END ---

# NSPR's ia64 branch declares _PR_ia64_Atomic{Increment,Decrement,Add,Set}
# as extern functions meant to be implemented in
# pr/src/md/unix/os_Linux_ia64.s. That file (and the surrounding
# PR_MD_ASFILES autoconf machinery in nsprpub/configure.in) is only wired
# up for a standalone NSPR build; Firefox's own moz.build-integrated NSPR
# build never compiles it, so those symbols end up undefined at link
# time. Other 64-bit architectures here (loongarch/powerpc64/mips/riscv)
# avoid this entirely by using GCC's built-in atomics instead of a
# hand-written per-arch assembly file; do the same for ia64, since GCC's
# ia64 backend has long supported these builtins.

--- firefox-152.0.5/nsprpub/pr/include/md/_linux.h.vanilla	2026-07-12 01:20:00.000000000 +0200
+++ firefox-152.0.5/nsprpub/pr/include/md/_linux.h	2026-07-12 01:21:00.000000000 +0200
@@ -117,14 +117,12 @@
 #endif
 
 #if defined(__ia64__)
+/* Use GCC built-in functions (no separate os_Linux_ia64.s in the
+ * moz.build-integrated NSPR build) */
 #define _PR_HAVE_ATOMIC_OPS
 #define _MD_INIT_ATOMIC()
-extern PRInt32 _PR_ia64_AtomicIncrement(PRInt32 *val);
-#define _MD_ATOMIC_INCREMENT          _PR_ia64_AtomicIncrement
-extern PRInt32 _PR_ia64_AtomicDecrement(PRInt32 *val);
-#define _MD_ATOMIC_DECREMENT          _PR_ia64_AtomicDecrement
-extern PRInt32 _PR_ia64_AtomicAdd(PRInt32 *ptr, PRInt32 val);
-#define _MD_ATOMIC_ADD                _PR_ia64_AtomicAdd
-extern PRInt32 _PR_ia64_AtomicSet(PRInt32 *val, PRInt32 newval);
-#define _MD_ATOMIC_SET                _PR_ia64_AtomicSet
+#define _MD_ATOMIC_INCREMENT(ptr) __sync_add_and_fetch(ptr, 1)
+#define _MD_ATOMIC_DECREMENT(ptr) __sync_sub_and_fetch(ptr, 1)
+#define _MD_ATOMIC_ADD(ptr, i) __sync_add_and_fetch(ptr, i)
+#define _MD_ATOMIC_SET(ptr, nv) __sync_lock_test_and_set(ptr, nv)
 #endif