################################################################################
#
# openblas
#
################################################################################

OPENBLAS_VERSION = 0.3.28
OPENBLAS_SITE = https://github.com/OpenMathLib/OpenBLAS/releases/download/v$(OPENBLAS_VERSION)
OPENBLAS_LICENSE = BSD-3-Clause
OPENBLAS_LICENSE_FILES = LICENSE
OPENBLAS_INSTALL_STAGING = YES
OPENBLAS_CPE_ID_VALID = YES

# Initialise OpenBLAS make options to $(TARGET_CONFIGURE_OPTS)
OPENBLAS_MAKE_OPTS = $(TARGET_CONFIGURE_OPTS)

# Enable cross-compiling
OPENBLAS_MAKE_OPTS += CROSS=1

# Set OpenBLAS target
OPENBLAS_MAKE_OPTS += TARGET=$(BR2_PACKAGE_OPENBLAS_TARGET)

# When Fortran is not available, only build the C version of BLAS
ifeq ($(BR2_TOOLCHAIN_HAS_FORTRAN),)
OPENBLAS_MAKE_OPTS += ONLY_CBLAS=1
endif

# Enable/Disable multi-threading (not for static-only since it uses dlfcn.h)
ifeq ($(BR2_PACKAGE_OPENBLAS_USE_THREAD),y)
OPENBLAS_MAKE_OPTS += USE_THREAD=1
else
OPENBLAS_MAKE_OPTS += USE_THREAD=0
endif

ifeq ($(BR2_PACKAGE_OPENBLAS_USE_LOCKING),y)
OPENBLAS_MAKE_OPTS += USE_LOCKING=1
else
# not passing USE_LOCKING=0 as this could be confusing: its effect is implicit
# in case of USE_THREAD=1.
endif

# We don't know if OpenMP is available or not, so disable
OPENBLAS_MAKE_OPTS += USE_OPENMP=0

# Static-only/Shared-only toggle
# Note: static library is always generated so that applications can link
# statically for size reduction, even if BR2_STATIC_LIBS is not set.
ifeq ($(BR2_STATIC_LIBS),y)
OPENBLAS_MAKE_OPTS += NO_SHARED=1
endif

ifeq ($(BR2_ARCH_IS_64),y)
OPENBLAS_MAKE_OPTS += BINARY=64
else
OPENBLAS_MAKE_OPTS += BINARY=32
endif

# binutils version <= 2.23.2 has a bug
# (https://sourceware.org/bugzilla/show_bug.cgi?id=14887) where
# whitespaces in ARM register specifications such as [ r1, #12 ] or [
# r2 ] cause the assembler to reject the code. Since there are
# numerous instances of such cases in the code, we use sed rather than
# a patch. We simply replace [ foobar ] by [foobar] to work around the
# problem.
define OPENBLAS_FIXUP_ARM_ASSEMBLY
	$(SED) 's%\[\s*%\[%;s%\s*\]%\]%' $(@D)/kernel/arm/*.S
endef

OPENBLAS_POST_PATCH_HOOKS += OPENBLAS_FIXUP_ARM_ASSEMBLY

define OPENBLAS_BUILD_CMDS
	$(TARGET_MAKE_ENV) $(MAKE) $(OPENBLAS_MAKE_OPTS) \
		-C $(@D)
endef

define OPENBLAS_INSTALL_STAGING_CMDS
	$(TARGET_MAKE_ENV) $(MAKE) $(OPENBLAS_MAKE_OPTS) \
		-C $(@D) install PREFIX=$(STAGING_DIR)/usr
endef

define OPENBLAS_INSTALL_TARGET_CMDS
	$(TARGET_MAKE_ENV) $(MAKE) $(OPENBLAS_MAKE_OPTS) \
		-C $(@D) install PREFIX=$(TARGET_DIR)/usr
endef

ifeq ($(BR2_PACKAGE_OPENBLAS_INSTALL_TESTS),y)
# Tests are always built, but are not installed, so we need to install
# them manually. The set of available tests may fluctuate depending on
# the architecture and other options, so only install whatever gets
# built.
define OPENBLAS_INSTALL_TESTS
	mkdir -p $(TARGET_DIR)/usr/libexec/openblas/tests
	find $(@D)/ctest \
		-type f -name "x[sdcz]cblat[123]" -perm -0100 \
		-exec $(INSTALL) -m 0755 {} \
			$(TARGET_DIR)/usr/libexec/openblas/tests \;
	find $(@D)/ctest \
		-type f -name "[sdcz]in[123]" \
		-exec $(INSTALL) -m 0644 {} \
			$(TARGET_DIR)/usr/libexec/openblas/tests \;
endef
OPENBLAS_POST_INSTALL_TARGET_HOOKS += OPENBLAS_INSTALL_TESTS
endif

$(eval $(generic-package))
