diff --git a/libbacktrace/Android.bp b/libbacktrace/Android.bp
index 200b6d6..684e611 100644
--- a/libbacktrace/Android.bp
+++ b/libbacktrace/Android.bp
@@ -22,9 +22,9 @@
         "-Werror",
     ],
 
+    // The latest clang (r230699) does not allow SP/PC to be declared in inline asm lists.
     clang_cflags: ["-Wno-inline-asm"],
 
-    // The latest clang (r230699) does not allow SP/PC to be declared in inline asm lists.
     include_dirs: ["external/libunwind/include/tdep"],
 
     // TODO: LLVM_DEVICE_BUILD_MK
@@ -130,4 +130,95 @@
             ],
         },
     }
-}
\ No newline at end of file
+}
+
+//-------------------------------------------------------------------------
+// The libbacktrace_offline static library.
+//-------------------------------------------------------------------------
+cc_library_static {
+    name: "libbacktrace_offline",
+    defaults: ["libbacktrace_common"],
+    host_supported: true,
+    srcs: ["BacktraceOffline.cpp"],
+
+    cflags: [
+        "-D__STDC_CONSTANT_MACROS",
+        "-D__STDC_LIMIT_MACROS",
+        "-D__STDC_FORMAT_MACROS",
+    ],
+
+    header_libs: ["llvm-headers"],
+
+    // Use shared libraries so their headers get included during build.
+    shared_libs = [
+        "libbase",
+        "libunwind",
+    ],
+}
+
+//-------------------------------------------------------------------------
+// The backtrace_test executable.
+//-------------------------------------------------------------------------
+cc_test {
+    name: "backtrace_test",
+    defaults: ["libbacktrace_common"],
+    host_supported: true,
+    srcs: [
+        "backtrace_offline_test.cpp",
+        "backtrace_test.cpp",
+        "GetPss.cpp",
+        "thread_utils.c",
+    ],
+
+    cflags: [
+        "-fno-builtin",
+        "-O0",
+        "-g",
+    ],
+
+    shared_libs: [
+        "libbacktrace_test",
+        "libbacktrace",
+        "libbase",
+        "libcutils",
+        "liblog",
+        "libunwind",
+    ],
+
+    group_static_libs: true,
+
+    // Statically link LLVMlibraries to remove dependency on llvm shared library.
+    static_libs = [
+        "libbacktrace_offline",
+        "libLLVMObject",
+        "libLLVMBitReader",
+        "libLLVMMC",
+        "libLLVMMCParser",
+        "libLLVMCore",
+        "libLLVMSupport",
+
+        "libziparchive",
+        "libz",
+    ],
+
+    header_libs: ["llvm-headers"],
+
+    target: {
+        android: {
+            cflags: ["-DENABLE_PSS_TESTS"],
+            shared_libs: [
+                "libdl",
+                "libutils",
+            ],
+        },
+        linux: {
+            host_ldlibs: [
+                "-lpthread",
+                "-lrt",
+                "-ldl",
+                "-lncurses",
+            ],
+            static_libs: ["libutils"],
+        },
+    },
+}
diff --git a/libbacktrace/Android.build.mk b/libbacktrace/Android.build.mk
deleted file mode 100644
index 2467f3e..0000000
--- a/libbacktrace/Android.build.mk
+++ /dev/null
@@ -1,95 +0,0 @@
-#
-# Copyright (C) 2014 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-include $(CLEAR_VARS)
-
-LOCAL_MODULE := $(module)
-LOCAL_MODULE_TAGS := $(module_tag)
-LOCAL_MULTILIB := $($(module)_multilib)
-ifeq ($(LOCAL_MULTILIB),both)
-ifneq ($(build_target),$(filter $(build_target),SHARED_LIBRARY STATIC_LIBRARY))
-  LOCAL_MODULE_STEM_32 := $(LOCAL_MODULE)32
-  LOCAL_MODULE_STEM_64 := $(LOCAL_MODULE)64
-endif
-endif
-
-ifeq ($(build_type),target)
-  include $(LLVM_DEVICE_BUILD_MK)
-else
-  include $(LLVM_HOST_BUILD_MK)
-endif
-
-LOCAL_ADDITIONAL_DEPENDENCIES += \
-    $(LOCAL_PATH)/Android.mk \
-    $(LOCAL_PATH)/Android.build.mk \
-
-LOCAL_CFLAGS += \
-    $(libbacktrace_common_cflags) \
-    $($(module)_cflags) \
-    $($(module)_cflags_$(build_type)) \
-
-LOCAL_CLANG_CFLAGS += \
-    $(libbacktrace_common_clang_cflags) \
-
-LOCAL_CONLYFLAGS += \
-    $(libbacktrace_common_conlyflags) \
-    $($(module)_conlyflags) \
-    $($(module)_conlyflags_$(build_type)) \
-
-LOCAL_CPPFLAGS += \
-    $(libbacktrace_common_cppflags) \
-    $($(module)_cppflags) \
-    $($(module)_cppflags_$(build_type)) \
-
-LOCAL_C_INCLUDES += \
-    $(libbacktrace_common_c_includes) \
-    $($(module)_c_includes) \
-    $($(module)_c_includes_$(build_type)) \
-
-LOCAL_SRC_FILES := \
-    $($(module)_src_files) \
-    $($(module)_src_files_$(build_type)) \
-
-LOCAL_STATIC_LIBRARIES += \
-    $($(module)_static_libraries) \
-    $($(module)_static_libraries_$(build_type)) \
-
-LOCAL_SHARED_LIBRARIES += \
-    $($(module)_shared_libraries) \
-    $($(module)_shared_libraries_$(build_type)) \
-
-LOCAL_LDLIBS += \
-    $($(module)_ldlibs) \
-    $($(module)_ldlibs_$(build_type)) \
-
-LOCAL_STRIP_MODULE := $($(module)_strip_module)
-
-ifeq ($(build_type),target)
-  include $(BUILD_$(build_target))
-endif
-
-ifeq ($(build_type),host)
-  # Only build if host builds are supported.
-  ifeq ($(build_host),true)
-    # -fno-omit-frame-pointer should be set for host build. Because currently
-    # libunwind can't recognize .debug_frame using dwarf version 4, and it relies
-    # on stack frame pointer to do unwinding on x86.
-    # $(LLVM_HOST_BUILD_MK) overwrites -fno-omit-frame-pointer. so the below line
-    # must be after the include.
-    LOCAL_CFLAGS += -Wno-extern-c-compat -fno-omit-frame-pointer
-    include $(BUILD_HOST_$(build_target))
-  endif
-endif
diff --git a/libbacktrace/Android.mk b/libbacktrace/Android.mk
deleted file mode 100644
index f4976e9..0000000
--- a/libbacktrace/Android.mk
+++ /dev/null
@@ -1,121 +0,0 @@
-#
-# Copyright (C) 2014 The Android Open Source Project
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-#
-
-LOCAL_PATH:= $(call my-dir)
-
-libbacktrace_common_cflags := \
-	-Wall \
-	-Werror \
-
-libbacktrace_common_c_includes := \
-	external/libunwind/include/tdep \
-
-# The latest clang (r230699) does not allow SP/PC to be declared in inline asm lists.
-libbacktrace_common_clang_cflags += \
-    -Wno-inline-asm
-
-build_host := false
-ifeq ($(HOST_OS),linux)
-ifeq ($(HOST_ARCH),$(filter $(HOST_ARCH),x86 x86_64))
-build_host := true
-endif
-endif
-
-LLVM_ROOT_PATH := external/llvm
-include $(LLVM_ROOT_PATH)/llvm.mk
-
-#-------------------------------------------------------------------------
-# The libbacktrace_offline static library.
-#-------------------------------------------------------------------------
-libbacktrace_offline_src_files := \
-	BacktraceOffline.cpp \
-
-# Use shared libraries so their headers get included during build.
-libbacktrace_offline_shared_libraries := \
-	libbase \
-	libunwind \
-
-module := libbacktrace_offline
-build_type := target
-build_target := STATIC_LIBRARY
-libbacktrace_offline_multilib := both
-include $(LOCAL_PATH)/Android.build.mk
-build_type := host
-include $(LOCAL_PATH)/Android.build.mk
-
-#-------------------------------------------------------------------------
-# The backtrace_test executable.
-#-------------------------------------------------------------------------
-backtrace_test_cflags := \
-	-fno-builtin \
-	-O0 \
-	-g \
-
-backtrace_test_cflags_target := \
-	-DENABLE_PSS_TESTS \
-
-backtrace_test_src_files := \
-	backtrace_offline_test.cpp \
-	backtrace_test.cpp \
-	GetPss.cpp \
-	thread_utils.c \
-
-backtrace_test_ldlibs_host := \
-	-lpthread \
-	-lrt \
-
-backtrace_test_shared_libraries := \
-	libbacktrace_test \
-	libbacktrace \
-	libbase \
-	libcutils \
-	liblog \
-	libunwind \
-
-backtrace_test_shared_libraries_target += \
-	libdl \
-	libutils \
-
-# Statically link LLVMlibraries to remove dependency on llvm shared library.
-backtrace_test_static_libraries := \
-	libbacktrace_offline \
-	libLLVMObject \
-	libLLVMBitReader \
-	libLLVMMC \
-	libLLVMMCParser \
-	libLLVMCore \
-	libLLVMSupport \
-
-backtrace_test_static_libraries_target := \
-	libziparchive \
-	libz \
-
-backtrace_test_static_libraries_host := \
-	libziparchive \
-	libz \
-	libutils \
-
-backtrace_test_ldlibs_host += \
-	-ldl \
-
-module := backtrace_test
-module_tag := debug
-build_type := target
-build_target := NATIVE_TEST
-backtrace_test_multilib := both
-include $(LOCAL_PATH)/Android.build.mk
-build_type := host
-include $(LOCAL_PATH)/Android.build.mk