commit ccdc311b3328166687b2b3098059d50f1e8ff6e9
author Alexey Polyudov <apolyudov@google.com> Mon Aug 01 17:41:49 2016 -0700
committer Alexey Polyudov <apolyudov@google.com> Tue Aug 02 08:06:28 2016 -0700
tree e7f0ed0043aa8fac013dc19c3257ce70e666396e
parent 8b540fd5ba4bf9b9f65437d3c160767500a7c587

introduce AUX build class of targets

AUX is a new class, similar to TARGET
While TARGET defines toolchain for Application Processors
AUX is defining toolchains for arbitrary utility cores (DSPs, GPUs,
MCUs, etc). This allows building of non-android sources as part
of Android tree and avoid using prebuilts if source code is avaliable

Bug: 29635686
Change-Id: Ie755ea054b16c3e86369f5fb2ba6eb0b384af77f
Signed-off-by: Alexey Polyudov <apolyudov@google.com>

core/aux_toolchain.mk

diff --git a/core/aux_toolchain.mk b/core/aux_toolchain.mk
new file mode 100644
index 0000000..de0b139
--- /dev/null
+++ b/core/aux_toolchain.mk
@@ -0,0 +1,53 @@
+###########################################################
+# takes form LOCAL_AUX_TOOLCHAIN_$(LOCAL_AUX_CPU)
+###########################################################
+
+###############################
+# setup AUX environment
+###############################
+
+# shortcuts for targets with a single instance of OS, ARCH, VARIANT, CPU
+AUX_TOOLCHAIN := $(if $(LOCAL_AUX_TOOLCHAIN),$(LOCAL_AUX_TOOLCHAIN),$(AUX_TOOLCHAIN_$(AUX_CPU)))
+AUX_BUILD_NOT_COMPATIBLE:=
+ifeq ($(strip $(AUX_TOOLCHAIN)),)
+  ifeq ($(strip $(AUX_CPU)),)
+    $(warning $(LOCAL_PATH): $(LOCAL_MODULE): Undefined CPU for AUX toolchain)
+    AUX_BUILD_NOT_COMPATIBLE += TOOLCHAIN
+  else
+    $(warning $(LOCAL_PATH): $(LOCAL_MODULE): Undefined AUX toolchain for CPU=$(AUX_CPU))
+    AUX_BUILD_NOT_COMPATIBLE += TOOLCHAIN
+  endif
+endif
+
+AUX_BUILD_NOT_COMPATIBLE += $(foreach var,OS ARCH SUBARCH CPU OS_VARIANT,$(if $(LOCAL_AUX_$(var)),$(if \
+    $(filter $(LOCAL_AUX_$(var)),$(AUX_$(var))),,$(var))))
+
+AUX_BUILD_NOT_COMPATIBLE := $(strip $(AUX_BUILD_NOT_COMPATIBLE))
+
+ifneq ($(AUX_BUILD_NOT_COMPATIBLE),)
+$(info $(LOCAL_PATH): $(LOCAL_MODULE): not compatible: "$(AUX_BUILD_NOT_COMPATIBLE)" with)
+$(info ====> OS=$(AUX_OS) CPU=$(AUX_CPU) ARCH=$(AUX_ARCH) SUBARCH=$(AUX_SUBARCH) OS_VARIANT=$(AUX_OS_VARIANT))
+$(info ====> TOOLCHAIN=$(AUX_TOOLCHAIN))
+endif
+
+AUX_AR := $(AUX_TOOLCHAIN)ar
+AUX_AS := $(AUX_TOOLCHAIN)gcc
+AUX_CC := $(AUX_TOOLCHAIN)gcc
+AUX_CXX := $(AUX_TOOLCHAIN)g++
+AUX_LINKER := $(AUX_TOOLCHAIN)ld
+AUX_OBJCOPY := $(AUX_TOOLCHAIN)objcopy
+AUX_OBJDUMP := $(AUX_TOOLCHAIN)objdump
+
+###############################
+# setup Android environment
+###############################
+
+LOCAL_IS_AUX_MODULE := true
+LOCAL_2ND_ARCH_VAR_PREFIX :=
+LOCAL_CC := $(AUX_CC)
+LOCAL_CXX := $(AUX_CXX)
+LOCAL_NO_DEFAULT_COMPILER_FLAGS := true
+LOCAL_SYSTEM_SHARED_LIBRARIES :=
+LOCAL_CXX_STL := none
+LOCAL_NO_PIC := true
+LOCAL_NO_LIBCOMPILER_RT := true