# Copyright 2012 the V8 project authors. All rights reserved.
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# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
#       notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above
#       copyright notice, this list of conditions and the following
#       disclaimer in the documentation and/or other materials provided
#       with the distribution.
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#       contributors may be used to endorse or promote products derived
#       from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Those definitions should be consistent with the main Makefile
ANDROID_ARCHES = android_ia32 android_arm android_mipsel
MODES = release debug

# Generates all combinations of ANDROID ARCHES and MODES,
# e.g. "android_ia32.release" or "android_arm.release"
ANDROID_BUILDS = $(foreach mode,$(MODES), \
                   $(addsuffix .$(mode),$(ANDROID_ARCHES)))

HOST_OS = $(shell uname -s | sed -e 's/Linux/linux/;s/Darwin/mac/')
ANDROID_NDK_HOST_ARCH ?= $(shell uname -m | sed -e 's/i[3456]86/x86/')
ifeq ($(HOST_OS), linux)
  TOOLCHAIN_DIR = linux-$(ANDROID_NDK_HOST_ARCH)
else
  ifeq ($(HOST_OS), mac)
    TOOLCHAIN_DIR = darwin-$(ANDROID_NDK_HOST_ARCH)
  else
    $(error Host platform "${HOST_OS}" is not supported)
  endif
endif

ifeq ($(ARCH), android_arm)
  DEFINES  = target_arch=arm v8_target_arch=arm android_target_arch=arm
  DEFINES += arm_neon=0 armv7=1
  TOOLCHAIN_ARCH = arm-linux-androideabi-4.6
else
  ifeq ($(ARCH), android_mipsel)
    DEFINES  = target_arch=mipsel v8_target_arch=mipsel android_target_arch=mips
    DEFINES += mips_arch_variant=mips32r2
    TOOLCHAIN_ARCH = mipsel-linux-android-4.6
  else
    ifeq ($(ARCH), android_ia32)
      DEFINES = target_arch=ia32 v8_target_arch=ia32 android_target_arch=x86
      TOOLCHAIN_ARCH = x86-4.6
    else
      $(error Target architecture "${ARCH}" is not supported)
    endif
  endif
endif

TOOLCHAIN_PATH = ${ANDROID_NDK_ROOT}/toolchains/${TOOLCHAIN_ARCH}/prebuilt
ANDROID_TOOLCHAIN ?= ${TOOLCHAIN_PATH}/${TOOLCHAIN_DIR}
ifeq ($(wildcard $(ANDROID_TOOLCHAIN)),)
  $(error Cannot find Android toolchain in "${ANDROID_TOOLCHAIN}".  Please \
          check that ANDROID_NDK_ROOT and ANDROID_NDK_HOST_ARCH are set    \
          correctly)
endif

# For mksnapshot host generation.
DEFINES += host_os=${HOST_OS}

.SECONDEXPANSION:
$(ANDROID_BUILDS): $(OUTDIR)/Makefile.$$(basename $$@)
	@$(MAKE) -C "$(OUTDIR)" -f Makefile.$(basename $@) \
	            CXX="$(ANDROID_TOOLCHAIN)/bin/*-g++" \
	            AR="$(ANDROID_TOOLCHAIN)/bin/*-ar" \
	            RANLIB="$(ANDROID_TOOLCHAIN)/bin/*-ranlib" \
	            CC="$(ANDROID_TOOLCHAIN)/bin/*-gcc" \
	            LD="$(ANDROID_TOOLCHAIN)/bin/*-ld" \
	            LINK="$(ANDROID_TOOLCHAIN)/bin/*-g++" \
	            BUILDTYPE=$(shell echo $(subst .,,$(suffix $@)) | \
	                        python -c "print raw_input().capitalize()") \
	            builddir="$(shell pwd)/$(OUTDIR)/$@"

# Android GYP file generation targets.
ANDROID_MAKEFILES = $(addprefix $(OUTDIR)/Makefile.,$(ANDROID_ARCHES))
$(ANDROID_MAKEFILES):
	@GYP_GENERATORS=make-android \
	GYP_DEFINES="${DEFINES}" \
	CC="${ANDROID_TOOLCHAIN}/bin/*-gcc" \
	CXX="${ANDROID_TOOLCHAIN}/bin/*-g++" \
	PYTHONPATH="$(shell pwd)/tools/generate_shim_headers:$(PYTHONPATH)" \
	build/gyp/gyp --generator-output="${OUTDIR}" build/all.gyp \
	              -Ibuild/standalone.gypi --depth=. -Ibuild/android.gypi \
	              -S.${ARCH} ${GYPFLAGS}