#  libunwind Makefile.uk
#
#  Authors: Vlad-Andrei Badoiu <vlad_andrei.badoiu@stud.acs.upb.ro>
#           Marco Schlumpp <marco@unikraft.io>
#           Andrei Tatar <andrei@unikraft.io>
#
#  Copyright (c) 2019, Politehnica University of Bucharest. All rights reserved.
#  Copyright (c) 2023, Unikraft GmbH and The Unikraft Authors.
#
#  Redistribution and use in source and binary forms, with or without
#  modification, are permitted provided that the following conditions
#  are met:
#
#  1. Redistributions of source code must retain the above copyright
#     notice, this list of conditions and the following disclaimer.
#  2. 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.
#  3. Neither the name of the copyright holder nor the names of its
#     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 "AS IS"
#  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
#  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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#


################################################################################
# Library registration
################################################################################
$(eval $(call addlib_s,libunwind,$(CONFIG_LIBUNWIND)))

################################################################################
# Sources
################################################################################
LIBUNWIND_VERSION=14.0.6
LIBUNWIND_URL=https://github.com/llvm/llvm-project/releases/download/llvmorg-$(LIBUNWIND_VERSION)/libunwind-$(LIBUNWIND_VERSION).src.tar.xz
LIBUNWIND_PATCHDIR=$(LIBUNWIND_BASE)/patches

ifeq ($(CONFIG_LIBUNWIND),y)
$(eval $(call fetch,libunwind,$(LIBUNWIND_URL)))
$(eval $(call patch,libunwind,$(LIBUNWIND_PATCHDIR),libunwind-$(LIBUNWIND_VERSION).src))
endif

################################################################################
# Helpers
################################################################################
LIBUNWIND_SRC=$(LIBUNWIND_ORIGIN)/libunwind-$(LIBUNWIND_VERSION).src

################################################################################
# Library includes
################################################################################
CINCLUDES-$(CONFIG_LIBUNWIND) += -I$(LIBUNWIND_SRC)/include
CXXINCLUDES-$(CONFIG_LIBUNWIND) += -I$(LIBUNWIND_SRC)/include

################################################################################
# Global flags
################################################################################
LIBUNWIND_FLAGS-y += -DNDEBUG
LIBUNWIND_FLAGS-y += -Wall
LIBUNWIND_FLAGS-y += -Wsign-compare
LIBUNWIND_FLAGS-y += -D_LIBUNWIND_IS_BAREMETAL
LIBUNWIND_FLAGS-y += -D_LIBUNWIND_IS_NATIVE_ONLY
LIBUNWIND_FLAGS-y += -D_LIBUNWIND_HAS_NO_THREADS
LIBUNWIND_FLAGS-y += -funwind-tables

LIBUNWIND_CFLAGS-y += $(LIBUNWIND_FLAGS-y)

LIBUNWIND_CXXFLAGS-y += $(LIBUNWIND_FLAGS-y)
LIBUNWIND_CXXFLAGS-y += -fno-rtti -fno-exceptions

LIBUNWIND_ASFLAGS-y += -D__linux__

################################################################################
# Library sources
################################################################################
# C++ sources
LIBUNWIND_SRCS-y += $(LIBUNWIND_SRC)/src/libunwind.cpp
LIBUNWIND_SRCS-y += $(LIBUNWIND_SRC)/src/Unwind-EHABI.cpp
LIBUNWIND_SRCS-y += $(LIBUNWIND_SRC)/src/Unwind-seh.cpp

# C sources
LIBUNWIND_SRCS-y += $(LIBUNWIND_SRC)/src/UnwindLevel1.c
LIBUNWIND_SRCS-y += $(LIBUNWIND_SRC)/src/UnwindLevel1-gcc-ext.c
LIBUNWIND_SRCS-y += $(LIBUNWIND_SRC)/src/Unwind-sjlj.c

# Assembly
LIBUNWIND_SRCS-y += $(LIBUNWIND_SRC)/src/UnwindRegistersRestore.S
LIBUNWIND_SRCS-y += $(LIBUNWIND_SRC)/src/UnwindRegistersSave.S