Separate libc.a hacks into its own component

native/jni/utils/Android.mk

@@ -1,15 +1,6 @@
 LOCAL_PATH := $(call my-dir)
 
-# All Magisk common code lives here
-
-UTILS_SRC_FILES := \
-    new.cpp \
-    files.cpp \
-    misc.cpp \
-    selinux.cpp \
-    logging.cpp \
-    xwrap.cpp \
-    stream.cpp
+# Magisk project-wide common code
 
 include $(CLEAR_VARS)
 LOCAL_MODULE:= libutils
@@ -17,14 +8,25 @@ LOCAL_C_INCLUDES := jni/include $(LOCAL_PATH)/include out/generated
 LOCAL_EXPORT_C_INCLUDES := $(LOCAL_C_INCLUDES)
 LOCAL_EXPORT_STATIC_LIBRARIES := libcxx
 LOCAL_STATIC_LIBRARIES := libcxx
-LOCAL_SRC_FILES := $(UTILS_SRC_FILES) missing.cpp
+LOCAL_SRC_FILES := \
+    new.cpp \
+    files.cpp \
+    misc.cpp \
+    selinux.cpp \
+    logging.cpp \
+    xwrap.cpp \
+    stream.cpp
 include $(BUILD_STATIC_LIBRARY)
 
+# libutils + "hacky" libc.a missing symbols
+
+# To build Magisk with vanilla NDK, simply
+# remove compat.cpp from sources, or replace
+# all usage of libutilx to libutils
+
 include $(CLEAR_VARS)
-LOCAL_MODULE:= libutils-shared
-LOCAL_C_INCLUDES := jni/include $(LOCAL_PATH)/include out/generated
-LOCAL_EXPORT_C_INCLUDES := $(LOCAL_C_INCLUDES)
-LOCAL_EXPORT_STATIC_LIBRARIES := libcxx
-LOCAL_STATIC_LIBRARIES := libcxx
-LOCAL_SRC_FILES := $(UTILS_SRC_FILES)
+LOCAL_MODULE:= libutilx
+LOCAL_EXPORT_STATIC_LIBRARIES := libutils
+LOCAL_STATIC_LIBRARIES := libutils
+LOCAL_SRC_FILES := compat/compat.cpp
 include $(BUILD_STATIC_LIBRARY)

native/jni/utils/compat/fortify.hpp

@@ -4,7 +4,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 
-#include "logging.hpp"
+#include <logging.hpp>
 
 #undef _FORTIFY_SOURCE