--- a/revert-795c8762b16b.patch	Thu Dec 10 14:36:59 2020 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,25 +0,0 @@
-diff --git a/build/moz.configure/lto-pgo.configure b/build/moz.configure/lto-pgo.configure
---- a/build/moz.configure/lto-pgo.configure
-+++ b/build/moz.configure/lto-pgo.configure
-@@ -224,17 +224,20 @@ def lto(value, c_compiler, ld64_known_go
-             #
-             # https://github.com/llvm/llvm-project/blob/e7694f34ab6a12b8bb480cbfcb396d0a64fe965f/llvm/lib/Target/X86/X86.td#L1165-L1187
-             if target.cpu == 'x86_64':
-                 ldflags.append('-mllvm:-mcpu=x86-64')
-             # We do not need special flags for arm64.  Hooray for fixed-length
-             # instruction sets.
-         else:
-             num_cores = multiprocessing.cpu_count()
--            cflags.append("-flto")
-+            if len(value) and value[0].lower() == 'full':
-+                cflags.append("-flto")
-+            else:
-+                cflags.append("-flto=thin")
-             cflags.append("-flifetime-dse=1")
- 
-             ldflags.append("-flto=%s" % num_cores)
-             ldflags.append("-flifetime-dse=1")
- 
-         # Tell LTO not to inline functions above a certain size, to mitigate
-         # binary size growth while still getting good performance.
-         # (For hot functions, PGO will put a multiplier on this limit.)