From 4d9f6f20154f1a368573f7386789b1f492e15cb5 Mon Sep 17 00:00:00 2001
From: Fabian Ruffy <5960321+fruffy@users.noreply.github.com>
Date: Thu, 2 May 2024 15:56:57 +0200
Subject: [PATCH] Introduce guard for aarch64 GCC compilation. (#4647)

* Introduce fix for aarch64 GCC compilation.

* Use a cmake-based check_include_file.

* Move comment.
---
 BUILD.bazel          | 3 +++
 CMakeLists.txt       | 1 +
 cmake/config.h.cmake | 3 +++
 lib/gc.cpp           | 3 +++
 4 files changed, 10 insertions(+)

diff --git a/BUILD.bazel b/BUILD.bazel
index eea47ed7ebd..1d80c296acb 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -26,10 +26,13 @@ genrule(
     name = "sed_config_h",
     srcs = ["cmake/config.h.cmake"],
     outs = ["config.h"],
+    # TODO: We should actually check these properly instead of just #undefing them.
+    # Maybe select() can help here?
     cmd = " | ".join([
         "sed 's|cmakedefine|define|g' < $(SRCS)",
         "sed 's|define HAVE_LIBGC 1|undef HAVE_LIBGC|g'",
         "sed 's|define HAVE_LIBBACKTRACE 1|undef HAVE_LIBBACKTRACE|g' > $(OUTS)",
+        "sed 's|define HAVE_MM_MALLOC_H 1|undef HAVE_MM_MALLOC_H|g' > $(OUTS)",
     ]),
     visibility = ["//visibility:private"],
 )
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0e9314e7b27..a0bab974676 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -237,6 +237,7 @@ include (CheckIncludeFile)
 check_include_file (execinfo.h HAVE_EXECINFO_H)
 check_include_file (ucontext.h HAVE_UCONTEXT_H)
 check_include_file (backtrace-supported.h HAVE_LIBBACKTRACE)
+check_include_file(mm_malloc.h, HAVE_MM_MALLOC_H)
 include (CheckIncludeFileCXX)
 check_include_file_cxx (cxxabi.h HAVE_CXXABI_H)
 
diff --git a/cmake/config.h.cmake b/cmake/config.h.cmake
index 5c5bebd699e..11de85d8eae 100644
--- a/cmake/config.h.cmake
+++ b/cmake/config.h.cmake
@@ -33,3 +33,6 @@
 
 /* Define to 1 if you have the cxxabi.h header */
 #cmakedefine HAVE_CXXABI_H 1
+
+/* Define to 1 if you have the mm_malloc.h header */
+#cmakedefine HAVE_MM_MALLOC_H 1
diff --git a/lib/gc.cpp b/lib/gc.cpp
index d13f364307f..7a9ee6703a5 100644
--- a/lib/gc.cpp
+++ b/lib/gc.cpp
@@ -19,7 +19,10 @@ limitations under the License.
 // of this to allow posix_memalign redeclaration with / without exception
 // specifier. As we define posix_memalign below in this file we really need to
 // ensure the proper include order to workaround this weirdness.
+// Some systems (e.g., GCC compiling on arm64) do not have mm_malloc.h. We need to skip it.
+#if HAVE_MM_MALLOC_H
 #include <mm_malloc.h>  // NOLINT(build/include_order)
+#endif
 
 #include "config.h"
 #if HAVE_LIBGC