#  libmusl Makefile.uk
#
#  Authors: Felipe Huici <felipe.huici@neclab.eu>
#           Gaulthier Gain <gaulthier.gain@uliege.be>
#           Alexander Jung <alexander.jung@neclab.eu>
#
#  Copyright (c) 2017, NEC Europe Ltd., NEC Corporation. All rights reserved.
#
#  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
#  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
#  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
#  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
#  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
#  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
#  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
#  POSSIBILITY OF SUCH DAMAGE.
#

################################################################################
# This will reserve space within `uk_tls` for the pthread structure in Musl.
# Please refer to ./arch/Makefile.rules for more details.
# For this version of Musl the size of "struct pthread" is 200.
################################################################################
ifeq ($(CONFIG_LIBMUSL),y)
$(eval $(call ukarch_tls_tcb_reserve,200))
endif

################################################################################
# On aarch64, newer versions of musl no longer expect a 16-byte reserved block
# at the end of the TCB. See: https://www.openwall.com/lists/musl/2018/06/01/14
################################################################################
ifeq ($(CONFIG_LIBMUSL),y)
ifeq (arm64,$(CONFIG_UK_ARCH))
$(eval $(call aarch64_no_reserved_tcb_overlap))
endif
endif

################################################################################
# Library registration
################################################################################
$(eval $(call addlib_s,libmusl,$(CONFIG_LIBMUSL)))

# Additionally, build glue code. This is put into a separate library so that we
# can apply a thick helping of warning suppressions to musl, which throws
# lots of compilation warnings, but keep our glue code up to our standards.
$(eval $(call addlib_s,libmuslglue,$(CONFIG_LIBMUSL)))

################################################################################
# Sources
################################################################################
LIBMUSL_VERSION=1.2.3
LIBMUSL_URL=https://www.musl-libc.org/releases/musl-$(LIBMUSL_VERSION).tar.gz
LIBMUSL_PATCHDIR=$(LIBMUSL_BASE)/patches
$(eval $(call fetch,libmusl,$(LIBMUSL_URL)))
$(eval $(call patch,libmusl,$(LIBMUSL_PATCHDIR),musl-$(LIBMUSL_VERSION)))

################################################################################
# Helpers
################################################################################
LIBMUSL_SUBDIR=musl-$(LIBMUSL_VERSION)
LIBMUSL=$(LIBMUSL_ORIGIN)/$(LIBMUSL_SUBDIR)/

# Additional macros for musl sub-libraries
include $(LIBMUSL_BASE)/Makefile.rules

################################################################################
# Library includes
################################################################################
MUSL_ARCH = $(subst arm64,aarch64,$(ARCH))

LIBMUSL_GLOBAL_INCLUDES-y   += -I$(LIBMUSL)/arch/$(MUSL_ARCH)
LIBMUSL_GLOBAL_INCLUDES-y   += -I$(LIBMUSL)/arch/generic
LIBMUSL_GLOBAL_INCLUDES-y   += -I$(LIBMUSL_BASE)/include

# Newer versions of Musl define internal wrapper headers for implementing some
# of the standard library headers (unistd.h, string.h etc.). These wrappers have exactly
# the same name as their standard counterparts, and they must be included very early in
# the include search path (i.e. before the CINCLUDES) for Musl source files. Due to how the
# build system is set up (see support/build/Makefile.rules), the only way we can do this
# is through the LIBMUSL_COMPFLAGS variable.
LIBMUSL_COMPFLAGS-y += -I$(LIBMUSL)/arch/$(MUSL_ARCH)
LIBMUSL_COMPFLAGS-y += -I$(LIBMUSL)/src/include
LIBMUSL_COMPFLAGS-y += -I$(LIBMUSL)/src/internal

CINCLUDES-$(CONFIG_LIBMUSL)    += $(LIBMUSL_GLOBAL_INCLUDES-y)
CXXINCLUDES-$(CONFIG_LIBMUSL)  += $(LIBMUSL_GLOBAL_INCLUDES-y)

################################################################################
# Musl-specific Targets
################################################################################
# generate alltypes.h through musl sed script
$(LIBMUSL)/arch/$(MUSL_ARCH)/bits/alltypes.h: $(LIBMUSL_BUILD)/.patched
	$(call verbose_cmd,CONFIGURE,libmusl: $(notdir $@),\
		sed -f $(LIBMUSL)/tools/mkalltypes.sed \
		$(LIBMUSL)/arch/$(MUSL_ARCH)/bits/alltypes.h.in \
		$(LIBMUSL)/include/alltypes.h.in > $@ && \
		$(TOUCH) $@)

# generate version.h
$(LIBMUSL)/src/internal/version.h: $(LIBMUSL_BUILD)/.origin
	$(call verbose_cmd,CONFIGURE,libmusl: $(notdir $@),\
		printf '#define VERSION "%s"\n' "$$(cd $(LIBMUSL); sh tools/version.sh)" > $@ && \
		$(TOUCH) $@)

UK_PREPARE += $(LIBMUSL)/arch/$(MUSL_ARCH)/bits/alltypes.h
UK_PREPARE += $(LIBMUSL)/src/internal/version.h
UK_PREPARE += $(LIBMUSL_BUILD)/.prepared

LIBMUSL_CLEAN += $(LIBMUSL)/arch/$(MUSL_ARCH)/bits/alltypes.h
LIBMUSL_CLEAN += $(LIBMUSL)/src/internal/version.h

################################################################################
# Global flags
################################################################################
LIBMUSL_HDRS_FLAGS-y += -Wno-unused-parameter
LIBMUSL_HDRS_FLAGS-y += -Wno-parentheses
LIBMUSL_HDRS_FLAGS-y += -Wno-builtin-macro-redefined

LIBMUSL_CFLAGS-y += -Wno-implicit-fallthrough
LIBMUSL_CFLAGS-$(call have_gcc) += -Wno-restrict
LIBMUSL_CFLAGS-$(call have_gcc) += -Wno-unused-but-set-variable
LIBMUSL_CFLAGS-y += -Wno-sign-compare
LIBMUSL_CFLAGS-y += -Wno-empty-body
LIBMUSL_CFLAGS-$(call have_gcc) += -Wno-maybe-uninitialized
LIBMUSL_CFLAGS-y += -Wno-unknown-pragmas
LIBMUSL_CFLAGS-y += -Wno-missing-braces
LIBMUSL_CFLAGS-$(call gcc_version_ge,8,0) += -Wno-cast-function-type
LIBMUSL_CFLAGS-$(call clang_version_ge,13,0) += -Wno-cast-function-type
LIBMUSL_CFLAGS-$(call have_gcc) += -Wno-format-contains-nul
LIBMUSL_CFLAGS-y += -Wno-type-limits
LIBMUSL_CFLAGS-$(call have_clang) += -Wno-macro-redefined
LIBMUSL_CFLAGS-$(call have_clang) += -Wno-string-plus-int
LIBMUSL_CFLAGS-y += -Wno-unused
LIBMUSL_CFLAGS-$(call have_gcc) += -Wno-old-style-declaration
LIBMUSL_CFLAGS-$(call clang_version_ge,15,0) += -Wno-deprecated-non-prototype
LIBMUSL_CFLAGS-y += -DUK_LIBC_SYSCALLS=0
LIBMUSL_CFLAGS-y += -D_XOPEN_SOURCE=700
LIBMUSL_CFLAGS-y += $(LIBMUSL_HDRS_FLAGS-y)
LIBMUSL_ASFLAGS-y += -Wno-unused-command-line-argument

# musl cannot rely on a libc library. Therefore, compile it as freestanding
# code.
LIBMUSL_CFLAGS-y += -ffreestanding

# We globally switch off warnings that are caused by musl's public headers
CFLAGS-$(CONFIG_LIBMUSL) += $(LIBMUSL_HDRS_FLAGS-y)
CXXFLAGS-$(CONFIG_LIBMUSL) += $(LIBMUSL_HDRS_FLAGS-y)

################################################################################
# OS dependencies code - Glue between Unicore and musl
################################################################################
LIBMUSLGLUE_SRCS-y += $(LIBMUSL_BASE)/mem.c
LIBMUSLGLUE_SRCS-y += $(LIBMUSL_BASE)/__uk_init_tls.c
LIBMUSLGLUE_SRCS-y += $(LIBMUSL_BASE)/__uk_unmapself.c
LIBMUSLGLUE_SRCS-y += $(LIBMUSL_BASE)/__set_thread_area.c
LIBMUSLGLUE_COMPFLAGS-y += -I$(LIBMUSL)/src/include
LIBMUSLGLUE_COMPFLAGS-y += -I$(LIBMUSL)/src/internal
LIBMUSLGLUE_CINCLUDES += -I$(LIBMUSL)/src/internal
LIBMUSLGLUE_CFLAGS-y += -Wno-unused-value

################################################################################
# Core Standard Library
################################################################################
LIBMUSL_CORE_HDRS-y += $(LIBMUSL)/include/sys/types.h
LIBMUSL_CORE_HDRS-y += $(LIBMUSL)/include/sys/param.h
LIBMUSL_CORE_HDRS-y += $(LIBMUSL)/include/sys/time.h
LIBMUSL_CORE_HDRS-y += $(LIBMUSL)/include/sys/mount.h
LIBMUSL_CORE_HDRS-y += $(LIBMUSL)/include/sys/sysmacros.h
LIBMUSL_CORE_HDRS-y += $(LIBMUSL)/include/sys/file.h
LIBMUSL_CORE_HDRS-y += $(LIBMUSL)/include/alloca.h
LIBMUSL_CORE_HDRS-y += $(LIBMUSL)/include/stdbool.h
LIBMUSL_CORE_HDRS-y += $(LIBMUSL)/include/limits.h
LIBMUSL_CORE_HDRS-y += $(LIBMUSL)/include/features.h
LIBMUSL_CORE_HDRS-y += $(LIBMUSL)/include/assert.h
LIBMUSL_CORE_HDRS-y += $(LIBMUSL)/include/sysexits.h

$(eval $(call _libmusl_import_lib,core,$(LIBMUSL_CORE_HDRS-y),$(LIBMUSL_CORE_SRCS-y)))

################################################################################
# musl code -- one external Makefile per sub-lib
################################################################################
ifeq ($(CONFIG_LIBMUSL_MQ),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.mq
endif
ifeq ($(CONFIG_LIBMUSL_DIRENT),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.dirent
endif
ifeq ($(CONFIG_LIBMUSL_MISC),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.misc
endif
ifeq ($(CONFIG_LIBMUSL_TEMP),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.temp
endif
ifeq ($(CONFIG_LIBMUSL_MULTIBYTE),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.multibyte
endif
ifeq ($(CONFIG_LIBMUSL_PROCESS),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.process
endif
ifeq ($(CONFIG_LIBMUSL_MMAN),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.mman
endif
ifeq ($(CONFIG_LIBMUSL_STDLIB),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.stdlib
endif
ifeq ($(CONFIG_LIBMUSL_FCNTL),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.fcntl
endif
ifeq ($(CONFIG_LIBMUSL_STDIO),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.stdio
endif
ifeq ($(CONFIG_LIBMUSL_CONF),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.conf
endif
ifeq ($(CONFIG_LIBMUSL_MATH),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.math
endif
ifeq ($(CONFIG_LIBMUSL_AIO),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.aio
endif
ifeq ($(CONFIG_LIBMUSL_STAT),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.stat
endif
ifeq ($(CONFIG_LIBMUSL_SEARCH),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.search
endif
ifeq ($(CONFIG_LIBMUSL_CRYPT),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.crypt
endif
ifeq ($(CONFIG_LIBMUSL_SELECT),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.select
endif
ifeq ($(CONFIG_LIBMUSL_MALLOC),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.malloc
endif
ifeq ($(CONFIG_LIBMUSL_UNISTD),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.unistd
endif
ifeq ($(CONFIG_LIBMUSL_SIGNAL),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.signal
endif
ifeq ($(CONFIG_LIBMUSL_THREAD),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.thread
endif
ifeq ($(CONFIG_LIBMUSL_LEGACY),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.legacy
endif
ifeq ($(CONFIG_LIBMUSL_ENV),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.env
endif
ifeq ($(CONFIG_LIBMUSL_TIME),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.time
endif
ifeq ($(CONFIG_LIBMUSL_ERRNO),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.errno
endif
ifeq ($(CONFIG_LIBMUSL_IPC),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.ipc
endif
ifeq ($(CONFIG_LIBMUSL_PRNG),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.prng
endif
ifeq ($(CONFIG_LIBMUSL_LDSO),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.ldso
endif
ifeq ($(CONFIG_LIBMUSL_PASSWD),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.passwd
endif
ifeq ($(CONFIG_LIBMUSL_FENV),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.fenv
endif
ifeq ($(CONFIG_LIBMUSL_CTYPE),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.ctype
endif
ifeq ($(CONFIG_LIBMUSL_LINUX),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.linux
endif
ifeq ($(CONFIG_LIBMUSL_INTERNAL),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.internal
endif
ifeq ($(CONFIG_LIBMUSL_NETWORK),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.network
endif
ifeq ($(CONFIG_LIBMUSL_SCHED),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.sched
endif
ifeq ($(CONFIG_LIBMUSL_STRING),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.string
endif
ifeq ($(CONFIG_LIBMUSL_REGEX),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.regex
endif
ifeq ($(CONFIG_LIBMUSL_TERMIOS),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.termios
endif
ifeq ($(CONFIG_LIBMUSL_EXIT),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.exit
endif
ifeq ($(CONFIG_LIBMUSL_SETJMP),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.setjmp
endif
ifeq ($(CONFIG_LIBMUSL_LOCALE),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.locale
endif
ifeq ($(CONFIG_LIBMUSL_COMPLEX),y)
include $(LIBMUSL_BASE)/Makefile.uk.musl.complex
endif