[rpms/chromium] epel9-next: Fix FTBFS: undefined symbol: __rust_no_alloc_shim_is_unstable on epel

[rpms/chromium] epel9-next: Fix FTBFS: undefined symbol: __rust_no_alloc_shim_is_unstable on epel

[Than Ngo]

A new commit has been pushed.

Repo   : rpms/chromium
Branch : epel9-next
Commit : 751b92fa9611a08bb455458c3097afe0f7206637
Author : Than Ngo <than@redhat.com>
Date   : 2025-09-04T15:52:56+02:00
Stats  : +21/-0 in 2 file(s)
URL    : https://src.fedoraproject.org/rpms/chromium/c/751b92fa9611a08bb455458c3097afe0f7206637?branch=epel9-next

Log:
Fix FTBFS: undefined symbol: __rust_no_alloc_shim_is_unstable on epel

---
diff --git a/chromium-rust-no-alloc-shim-is-unstable.patch b/chromium-rust-no-alloc-shim-is-unstable.patch
new file mode 100644
index 0000000..f22d906
--- /dev/null
+++ b/chromium-rust-no-alloc-shim-is-unstable.patch
@@ -0,0 +1,15 @@
+--- chromium-140.0.7339.80/build/rust/allocator/lib.rs	2025-08-29 20:50:09.000000000 +0200
++++ chromium-139.0.7258.154/build/rust/allocator/lib.rs	2025-08-25 18:10:00.000000000 +0200
+@@ -90,6 +90,12 @@
+     #[linkage = "weak"]
+     fn __rust_no_alloc_shim_is_unstable_v2() {}
+ 
++    // TODO(crbug.com/422538133) Remove after rolling past
++    // https://github.com/rust-lang/rust/pull/141061
++    #[no_mangle]
++    #[linkage = "weak"]
++    static __rust_no_alloc_shim_is_unstable: u8 = 0;
++
+     // Mangle the symbol name as rustc expects.
+     #[rustc_std_internal_symbol]
+     #[allow(non_upper_case_globals)]

diff --git a/chromium.spec b/chromium.spec
index 6f293d6..6c9577d 100644
--- a/chromium.spec
+++ b/chromium.spec
@@ -315,6 +315,9 @@ Patch309: chromium-132-el8-unsupport-rustc-flags.patch
 # Fix rhbz#2387446, FTBFS with rust-1.89.0
 Patch310: chromium-139-rust-FTBFS-suppress-warnings.patch
 
+# Fix FTBFS: undefined symbol: __rust_no_alloc_shim_is_unstable
+Patch311: chromium-rust-no-alloc-shim-is-unstable.patch
+
 # enable fstack-protector-strong
 Patch312: chromium-123-fstack-protector-strong.patch
 
@@ -993,6 +996,9 @@ Qt6 UI for chromium.
 %endif
 
 %patch -P310 -p1 -b .rust-FTBFS-suppress-warnings
+%if 0%{?rhel}
+%patch -P311 -p1 -b .rust-no-alloc-shim-is-unstable
+%endif
 %patch -P312 -p1 -b .fstack-protector-strong
 
 %if 0%{?rhel} && 0%{?rhel} < 10