From bf87ec9e442d554bf1bc5874c1db9607e59899e3 Mon Sep 17 00:00:00 2001
From: Esun Kim <veblush@google.com>
Date: Wed, 19 Aug 2020 18:17:39 -0700
Subject: [PATCH] Add ABSL_RANDOM_HWAES_FLAGS

---
 Makefile                    | 14 +++++++++++++-
 build_handwritten.yaml      |  2 +-
 templates/Makefile.template | 12 ++++++++++++
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index 9fc06b0edf3..d22d4bab72e 100644
--- a/Makefile
+++ b/Makefile
@@ -34,6 +34,13 @@ ifeq ($(SYSTEM),MINGW64)
 SYSTEM = MINGW32
 endif
 
+# Basic machine detection
+HOST_MACHINE = $(shell uname -m)
+ifeq ($(HOST_MACHINE),x86_64)
+HOST_IS_X86_64 = true
+else
+HOST_IS_X86_64 = false
+endif
 
 MAKEFILE_PATH := $(abspath $(lastword $(MAKEFILE_LIST)))
 ifndef BUILDDIR
@@ -696,6 +703,11 @@ CPPFLAGS := -Ithird_party/address_sorting/include $(CPPFLAGS)
 
 GRPC_ABSEIL_DEP = $(LIBDIR)/$(CONFIG)/libgrpc_abseil.a
 GRPC_ABSEIL_MERGE_LIBS = $(LIBDIR)/$(CONFIG)/libgrpc_abseil.a
+ifeq ($(HOST_IS_X86_64),true)
+ABSL_RANDOM_HWAES_FLAGS = -maes -msse4
+else
+ABSL_RANDOM_HWAES_FLAGS =
+endif
 
 RE2_DEP = $(LIBDIR)/$(CONFIG)/libre2.a
 RE2_MERGE_OBJS = $(LIBRE2_OBJS)
@@ -4508,7 +4520,7 @@ LIBGRPC_ABSEIL_SRC = \
 
 LIBGRPC_ABSEIL_OBJS = $(addprefix $(OBJDIR)/$(CONFIG)/, $(addsuffix .o, $(basename $(LIBGRPC_ABSEIL_SRC))))
 
-$(LIBGRPC_ABSEIL_OBJS): CPPFLAGS += -g -maes -msse4 -Ithird_party/abseil-cpp
+$(LIBGRPC_ABSEIL_OBJS): CPPFLAGS += -g $(ABSL_RANDOM_HWAES_FLAGS) -Ithird_party/abseil-cpp
 
 $(LIBDIR)/$(CONFIG)/libgrpc_abseil.a:  $(LIBGRPC_ABSEIL_OBJS) 
 	$(E) "[AR]      Creating $@"
diff --git a/build_handwritten.yaml b/build_handwritten.yaml
index 26e1af33600..63451d14c3e 100644
--- a/build_handwritten.yaml
+++ b/build_handwritten.yaml
@@ -196,7 +196,7 @@ configs:
       UBSAN_OPTIONS: halt_on_error=1:print_stacktrace=1:suppressions=test/core/util/ubsan_suppressions.txt
 defaults:
   abseil:
-    CPPFLAGS: -g -maes -msse4 -Ithird_party/abseil-cpp
+    CPPFLAGS: -g $(ABSL_RANDOM_HWAES_FLAGS) -Ithird_party/abseil-cpp
   ares:
     CFLAGS: -g
     CPPFLAGS: -Ithird_party/cares -Ithird_party/cares/cares -fvisibility=hidden -D_GNU_SOURCE
diff --git a/templates/Makefile.template b/templates/Makefile.template
index 897291ba141..581367e0a63 100644
--- a/templates/Makefile.template
+++ b/templates/Makefile.template
@@ -82,6 +82,13 @@
   SYSTEM = MINGW32
   endif
 
+  # Basic machine detection
+  HOST_MACHINE = $(shell uname -m)
+  ifeq ($(HOST_MACHINE),x86_64)
+  HOST_IS_X86_64 = true
+  else
+  HOST_IS_X86_64 = false
+  endif
 
   MAKEFILE_PATH := $(abspath $(lastword $(MAKEFILE_LIST)))
   ifndef BUILDDIR
@@ -567,6 +574,11 @@
 
   GRPC_ABSEIL_DEP = $(LIBDIR)/$(CONFIG)/libgrpc_abseil.a
   GRPC_ABSEIL_MERGE_LIBS = $(LIBDIR)/$(CONFIG)/libgrpc_abseil.a
+  ifeq ($(HOST_IS_X86_64),true)
+  ABSL_RANDOM_HWAES_FLAGS = -maes -msse4
+  else
+  ABSL_RANDOM_HWAES_FLAGS =
+  endif
 
   RE2_DEP = $(LIBDIR)/$(CONFIG)/libre2.a
   RE2_MERGE_OBJS = $(LIBRE2_OBJS)