#!/usr/bin/make -f
#export DH_VERBOSE=1

include /usr/share/dpkg/default.mk

export DEB_BUILD_MAINT_OPTIONS = hardening=+all optimize=+lto
export DPKG_GENSYMBOLS_CHECK_LEVEL = 4

%:
	dh $@ --buildsystem=cmake+ninja

# Let's pretend to know what we are doing:
DEB_CXXFLAGS_MAINT_APPEND += -DHWY_BROKEN_EMU128=0

ifneq (,$(filter $(DEB_HOST_ARCH), armel armhf))
  # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77728
  DEB_CXXFLAGS_MAINT_APPEND += -Wno-psabi
endif

ifeq ($(DEB_HOST_ARCH_CPU),i386)
  # https://github.com/google/highway/issues/1488
  DEB_CXXFLAGS_MAINT_APPEND += -fexcess-precision=standard
endif

ifeq ($(DEB_HOST_ARCH),$(filter $(DEB_HOST_ARCH),armhf))
  # https://github.com/google/highway/issues/1271
  CMAKE_EXTRA_FLAGS += -DHWY_CMAKE_ARM7:BOOL=ON
  # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111231
  DEB_CXXFLAGS_MAINT_APPEND += -fno-tree-vectorize
  # https://github.com/google/highway/issues/2200
  DEB_CXXFLAGS_MAINT_APPEND += -O1
  # Switching to O1 generate a different error than O2, prefer O0:
  DEB_CXXFLAGS_MAINT_APPEND += -O0
endif

ifeq ($(DEB_HOST_ARCH),$(filter $(DEB_HOST_ARCH),riscv64))
  # https://github.com/google/highway/issues/1740
  CMAKE_EXTRA_FLAGS += -DHWY_CMAKE_RVV:BOOL=OFF
endif

include /usr/share/dpkg/buildtools.mk

export DEB_CXXFLAGS_MAINT_APPEND

# test suite rely on CMAKE_SKIP_RPATH=OFF
CMAKE_EXTRA_FLAGS += \
 -DCMAKE_SKIP_RPATH:BOOL=OFF \
 -DBUILD_SHARED_LIBS:BOOL=ON \
 -DHWY_WARNINGS_ARE_ERRORS:BOOL=ON \
 -DHWY_SYSTEM_GTEST:BOOL=ON

ifneq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
CMAKE_EXTRA_FLAGS += -DBUILD_TESTING=OFF
endif

override_dh_auto_configure-arch:
	dh_auto_configure -- $(CMAKE_EXTRA_FLAGS)

override_dh_auto_install-arch:
ifeq ($(DEB_HOST_ARCH),$(filter $(DEB_HOST_ARCH),armhf))
	sed -i -e 's/HWY_CMAKE_ARM7:BOOL=ON/HWY_CMAKE_ARM7:BOOL=OFF/' obj-*/CMakeCache.txt
endif
	dh_auto_install

ifeq (,$(filter nocheck,$(DEB_BUILD_OPTIONS)))
# run default example to check compilation ok:
override_dh_install-arch:
ifeq (,$(filter $(DEB_BUILD_ARCH),hurd-i386))
	obj-*/examples/hwy_benchmark
else
	echo "CPU 'QEMU Virtual CPU version 2.5+' does not support RDTSCP, skipping benchmark."
endif
	dh_install
endif

override_dh_clean-indep:
	dh_clean debian_docs/

override_dh_auto_configure-indep:
override_dh_auto_build-indep:
	# most docs are ok as-is
	cp -a g3doc debian_docs
	# let's shrink a bit this one:
	gs  -q -dNOPAUSE -dBATCH -dSAFER \
		-sDEVICE=pdfwrite \
		-dCompatibilityLevel=1.5 \
		-dPDFSETTINGS=/screen \
		-dEmbedAllFonts=true \
		-dSubsetFonts=true \
		-dColorImageDownsampleType=/Bicubic \
		-dColorImageResolution=72 \
		-dGrayImageDownsampleType=/Bicubic \
		-dGrayImageResolution=72 \
		-dMonoImageDownsampleType=/Bicubic \
		-dMonoImageResolution=72 \
		-sOutputFile=debian_docs/highway_intro.pdf ./g3doc/highway_intro.pdf

override_dh_auto_test-indep:
override_dh_auto_install-indep:
override_dh_compress-indep:
	# do not compress .pdf/.md files for documentation
	dh_compress -X.md -X.pdf