diff --git a/toolchain/gcc/patches/8.4.0/999-fix-apple-silicon-support.patch b/toolchain/gcc/patches/8.4.0/999-fix-apple-silicon-support.patch
new file mode 100644
index 000000000..5e8d84f36
--- /dev/null
+++ b/toolchain/gcc/patches/8.4.0/999-fix-apple-silicon-support.patch
@@ -0,0 +1,30 @@
+diff -ru a/gcc/config/host-darwin.c b/gcc/config/host-darwin.c
+--- a/gcc/config/host-darwin.c	2021-05-14 10:42:08.000000000 +0200
++++ b/gcc/config/host-darwin.c	2021-08-07 22:51:11.000000000 +0200
+@@ -22,6 +22,8 @@
+ #include "coretypes.h"
+ #include "diagnostic-core.h"
+ #include "config/host-darwin.h"
++#include "hosthooks.h"
++#include "hosthooks-def.h"
+ 
+ /* Yes, this is really supposed to work.  */
+ static char pch_address_space[1024*1024*1024] __attribute__((aligned (4096)));
+@@ -75,3 +77,5 @@
+ 
+   return ret;
+ }
++
++const struct host_hooks host_hooks = HOST_HOOKS_INITIALIZER;
+diff -ru a/gcc/config/aarch64/aarch64.h b/gcc/config/aarch64/aarch64.h
+--- a/gcc/config/aarch64/aarch64.h  2021-05-14 10:42:08.000000000 +0200
++++ b/gcc/config/aarch64/aarch64.h  2021-08-10 00:54:13.000000000 +0200
+@@ -1013,7 +1013,7 @@
+ #define MCPU_TO_MARCH_SPEC_FUNCTIONS \
+   { "rewrite_mcpu", aarch64_rewrite_mcpu },
+ 
+-#if defined(__aarch64__)
++#if defined(__aarch64__) && ! defined(__APPLE__)
+ extern const char *host_detect_local_cpu (int argc, const char **argv);
+ #define HAVE_LOCAL_CPU_DETECT
+ # define EXTRA_SPEC_FUNCTIONS                  \
\ No newline at end of file