#!/usr/bin/make -f

include /usr/share/dpkg/default.mk
include /usr/share/dpkg/pkg-info.mk
include /usr/share/dpkg/architecture.mk

export DEB_BUILD_MAINT_OPTIONS := hardening=+all
export DEB_LDFLAGS_MAINT_APPEND := -Wl,-z,defs

# In the normative branch, we need to manually set the target cpu to
# enable optimisation
ifeq ($(DEB_HOST_ARCH_CPU),arm64)
  TARGET_CPU = arm64
else ifeq ($(DEB_HOST_ARCH_CPU)_$(DEB_HOST_ARCH_ABI),arm_eabihf)
  TARGET_CPU = armv7
  # On ARM, we need to manually pass the flag used to compile NEON
  # code with
  CONFIG_EXTRA := -DAOM_NEON_INTRIN_FLAG=-mfpu=neon
else ifneq ($(filter mips64%, $(DEB_HOST_ARCH_CPU)),)
  TARGET_CPU = mips64
else ifneq ($(filter mips%, $(DEB_HOST_ARCH_CPU)),)
  TARGET_CPU = mips32
else ifneq ($(filter ppc% powerpc%, $(DEB_HOST_ARCH_CPU)),)
  TARGET_CPU = ppc
else ifeq ($(DEB_HOST_ARCH_CPU)_$(DEB_HOST_ARCH_ABI),amd64_base)
  TARGET_CPU = x86_64
else ifeq ($(DEB_HOST_ARCH_CPU),i386)
  TARGET_CPU = x86
else
  TARGET_CPU = generic
endif

# Disable AltiVec on powerpcspe
ifeq ($(DEB_HOST_ARCH),powerpcspe)
  CONFIG_EXTRA := -DENABLE_VSX=OFF
endif

# Explicitly set internal flag CONFIG_BIG_ENDIAN, because
# aom CMake buildsystem does not detect endian issue and
# cannot set this internal flag correctly.
# Ref: https://bugs.chromium.org/p/aomedia/issues/detail?id=3487#c20
ifeq ($(DEB_BUILD_ARCH_ENDIAN),little)
  CONFIG_EXTRA_ENDIAN := -DCONFIG_BIG_ENDIAN=0
else
  CONFIG_EXTRA_ENDIAN := -DCONFIG_BIG_ENDIAN=1
endif


# Use -Bbuild-debian to locate built documentation
%:
	dh $@ -Bbuild-debian

# Force building with system libyuv and webm
execute_before_dh_auto_configure:
	rm -rf $(CURDIR)/third_party/libyuv
	rm -rf $(CURDIR)/third_party/libwebm

# Tests disabled because they require network access to download test
#  data.
#
# Setting GIT_EXECUTABLE to some invalid file prevents the version
#  being taken from git if we're on a Debian packaging git branch.
#
# For FORCE_HIGHBITDEPTH_DECODING, see git commit
# 2dd87d9b05b36811aaf19d3c4e47e6e04ccf9de8.
#
override_dh_auto_configure:
	dh_auto_configure -- \
		-DBUILD_SHARED_LIBS=1 \
		-DFORCE_HIGHBITDEPTH_DECODING=0 \
		-DCONFIG_LIBYUV=1 \
		-DCONFIG_MULTITHREAD=1 \
		-DENABLE_TESTS=0 \
		-DGIT_EXECUTABLE=/nonexistant-binary \
		-DAOM_TARGET_CPU=$(TARGET_CPU) \
		$(CONFIG_EXTRA_ENDIAN) \
		$(CONFIG_EXTRA)

# Do not compress html changelog which breaks documentation
override_dh_compress:
	dh_compress -Xchangelog.html

override_dh_auto_test:
	dh_auto_test
	PATH=$$PATH:$(CURDIR)/build-debian AUTOPKGTEST_TMP=build-debian ./debian/tests/encode-decode
	CFLAGS=-I$(CURDIR) LDFLAGS="-laom -L$(CURDIR)/build-debian" AUTOPKGTEST_TMP=build-debian ./debian/tests/library-build

# Currently manually invoked before build. Not invoked during build.
help2man:
	help2man --version-string='$(DEB_VERSION_UPSTREAM)' -n 'AOMedia Project AV1 Encoder' -N --no-discard-stderr debian/tmp/usr/bin/aomenc > debian/aomenc.1
	help2man --version-string='$(DEB_VERSION_UPSTREAM)' -n 'AOMedia Project AV1 Decoder' -N --no-discard-stderr debian/tmp/usr/bin/aomdec > debian/aomdec.1

.PHONY: help2man