# Copyright (C) 2023-2024 Free Software Foundation, Inc.
#
# This file is part of GCC.
#
# GCC is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# GCC is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with GCC; see the file COPYING3.  If not see
# <http://www.gnu.org/licenses/>.

# Helper definitions
comma=,
null  :=
space := $(null) #
exclude_1st = $(wordlist 2,$(words $1),$1)

# Common definitions
mlib_all := lp64d lp64f lp64s
$(foreach i,$(mlib_all),$(eval MULTISUBDIR_$i := base/$i))

mlib_default := $(firstword $(subst $(comma), ,$(TM_MULTILIB_CONFIG)))
mlib_all := $(filter-out $(mlib_default),$(mlib_all))

MULTILIB_OPTIONS := $(subst $(space),/,$(foreach i,$(mlib_all),mabi=$(i)))
MULTILIB_DIRNAMES := $(foreach i,$(mlib_all),$(MULTISUBDIR_$(i)))

# Customize builds with --with-multilib-list
MULTILIB_REQUIRED := $(foreach i,$(call exclude_1st,\
	$(subst $(comma), ,$(TM_MULTILIB_CONFIG))),\
	$(firstword $(subst /, ,$(i))))

## spec rules for building libraries, triggered by -fmultiflags
gen_mlib_spec = $(if $(word 2,$1),\
	%{$(firstword $1):$(patsubst %,-%,$(call exclude_1st,$1)}))

lib_build_spec = $(foreach mlib,\
	$(call exclude_1st,$(subst $(comma), ,$(TM_MULTILIB_CONFIG))),\
	$(call gen_mlib_spec,$(subst /, ,$(mlib))))

default_mlib_spec := %{fmultiflags:%{!mabi=*:-mabi=$(mlib_default)}}
lib_build_spec    := %{fmultiflags:$(lib_build_spec)}

ifneq ($(TM_MULTILIB_CONFIG),)
loongarch-multilib.h:
	@echo "#define MLIB_SELF_SPECS" \
	      "\"$(default_mlib_spec)\"," \
	      "\"$(lib_build_spec)\"," > $@
else
loongarch-multilib.h: ; @touch $@
endif

# Multiarch
ifneq ($(call if_multiarch,yes),yes)
    # Define LA_DISABLE_MULTIARCH if multiarch is disabled.
    tm_defines += LA_DISABLE_MULTIARCH
else
    # Only define MULTIARCH_DIRNAME when multiarch is enabled,
    # or it would always introduce ${target} into the search path.
    MULTIARCH_DIRNAME = $(LA_MULTIARCH_TRIPLET)
endif