display-hal: Exclude HWC libs compilation.

This change introduces compilation flag to
compile standalone SDM libs.

Change-Id: I3f8cde50e1806c6cf157364657d77fd9a780d5e3
diff --git a/sdm/include/utils/sys.h b/sdm/include/utils/sys.h
index c06b7f8..b90007a 100644
--- a/sdm/include/utils/sys.h
+++ b/sdm/include/utils/sys.h
@@ -49,7 +49,11 @@
 #endif
 
   // Pointers to system calls which are either mapped to actual system call or virtual driver.
+#ifdef TARGET_HEADLESS
+  typedef int (*ioctl)(int, unsigned long int, ...);  // NOLINT
+#else
   typedef int (*ioctl)(int, int, ...);
+#endif
   typedef int (*open)(const char *, int, ...);
   typedef int (*close)(int);
   typedef int (*poll)(struct pollfd *, nfds_t, int);
diff --git a/sdm/libs/core/Android.mk b/sdm/libs/core/Android.mk
index 5e88683..08d81b4 100644
--- a/sdm/libs/core/Android.mk
+++ b/sdm/libs/core/Android.mk
@@ -5,12 +5,9 @@
 LOCAL_MODULE                  := libsdmcore
 LOCAL_MODULE_TAGS             := optional
 LOCAL_C_INCLUDES              := $(common_includes) $(kernel_includes)
-LOCAL_CFLAGS                  := -Wno-missing-field-initializers -Wno-unused-parameter \
-                                 -std=c++11 -fcolor-diagnostics\
-                                 -DLOG_TAG=\"SDM\" $(common_flags)
-LOCAL_CLANG                   := true
+LOCAL_CFLAGS                  := -Wno-unused-parameter -DLOG_TAG=\"SDM\" $(common_flags)
 LOCAL_HW_INTF_PATH            := fb
-LOCAL_SHARED_LIBRARIES        := libdl libsdmutils libc++
+LOCAL_SHARED_LIBRARIES        := libdl libsdmutils
 LOCAL_ADDITIONAL_DEPENDENCIES := $(common_deps) $(kernel_deps)
 LOCAL_SRC_FILES               := core_interface.cpp \
                                  core_impl.cpp \
diff --git a/sdm/libs/utils/Android.mk b/sdm/libs/utils/Android.mk
index f482a6d..928f3c4 100644
--- a/sdm/libs/utils/Android.mk
+++ b/sdm/libs/utils/Android.mk
@@ -5,10 +5,7 @@
 LOCAL_MODULE                  := libsdmutils
 LOCAL_MODULE_TAGS             := optional
 LOCAL_C_INCLUDES              := $(common_includes)
-LOCAL_CFLAGS                  := -Wno-missing-field-initializers \
-                                 -std=c++11 -fcolor-diagnostics\
-                                 -DLOG_TAG=\"SDM\" $(common_flags)
-LOCAL_CLANG                   := true
+LOCAL_CFLAGS                  := -DLOG_TAG=\"SDM\" $(common_flags)
 LOCAL_SRC_FILES               := debug.cpp \
                                  rect.cpp \
                                  sys.cpp \