Support libcorkscrew on x86 hosts in binaries using glibc.

Change-Id: I1f2b7f21cc7f8227dbe7d294fed88cb691a24d09
diff --git a/libcorkscrew/Android.mk b/libcorkscrew/Android.mk
index 433f93c..9019986 100644
--- a/libcorkscrew/Android.mk
+++ b/libcorkscrew/Android.mk
@@ -14,9 +14,7 @@
 
 LOCAL_PATH:= $(call my-dir)
 
-include $(CLEAR_VARS)
-
-LOCAL_SRC_FILES := \
+generic_src_files := \
 	backtrace.c \
 	backtrace-helper.c \
 	demangle.c \
@@ -24,16 +22,24 @@
 	ptrace.c \
 	symbol_table.c
 
-ifeq ($(TARGET_ARCH),arm)
-LOCAL_SRC_FILES += \
+arm_src_files := \
 	arch-arm/backtrace-arm.c \
 	arch-arm/ptrace-arm.c
+
+x86_src_files := \
+	arch-x86/backtrace-x86.c \
+	arch-x86/ptrace-x86.c
+
+include $(CLEAR_VARS)
+
+LOCAL_SRC_FILES := $(generic_src_files)
+
+ifeq ($(TARGET_ARCH),arm)
+LOCAL_SRC_FILES += $(arm_src_files)
 LOCAL_CFLAGS += -DCORKSCREW_HAVE_ARCH
 endif
 ifeq ($(TARGET_ARCH),x86)
-LOCAL_SRC_FILES += \
-	arch-x86/backtrace-x86.c \
-	arch-x86/ptrace-x86.c
+LOCAL_SRC_FILES += $(x86_src_files)
 LOCAL_CFLAGS += -DCORKSCREW_HAVE_ARCH
 endif
 
@@ -44,3 +50,38 @@
 LOCAL_MODULE_TAGS := optional
 
 include $(BUILD_SHARED_LIBRARY)
+
+# Build test.
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := test.c
+LOCAL_CFLAGS += -std=gnu99 -Werror -fno-inline-small-functions
+LOCAL_SHARED_LIBRARIES := libcorkscrew
+LOCAL_MODULE := libcorkscrew_test
+LOCAL_MODULE_TAGS := optional
+include $(BUILD_EXECUTABLE)
+
+
+ifeq ($(HOST_OS)-$(HOST_ARCH),linux-x86)
+
+# Build libcorkscrew.
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES += $(generic_src_files) $(x86_src_files)
+LOCAL_CFLAGS += -DCORKSCREW_HAVE_ARCH
+LOCAL_SHARED_LIBRARIES += libgccdemangle
+LOCAL_STATIC_LIBRARIES += libcutils
+LOCAL_LDLIBS += -ldl -lrt
+LOCAL_CFLAGS += -std=gnu99 -Werror
+LOCAL_MODULE := libcorkscrew
+LOCAL_MODULE_TAGS := optional
+include $(BUILD_HOST_SHARED_LIBRARY)
+
+# Build test.
+include $(CLEAR_VARS)
+LOCAL_SRC_FILES := test.c
+LOCAL_CFLAGS += -std=gnu99 -Werror -fno-inline-small-functions
+LOCAL_SHARED_LIBRARIES := libcorkscrew
+LOCAL_MODULE := libcorkscrew_test
+LOCAL_MODULE_TAGS := optional
+include $(BUILD_HOST_EXECUTABLE)
+
+endif # linux-x86