# -*- makefile -*-
# Copyright (c) 1999-2007 Hewlett-Packard Development Company, L.P.
#	Contributed by David Mosberger <davidm@hpl.hp.com>
#	Contributed by Stephane Eranian <eranian@hpl.hp.com>
#
#    All rights reserved.
#
#    Redistribution and use in source and binary forms, with or without
#    modification, are permitted provided that the following conditions
#    are met:
#
#    * Redistributions of source code must retain the above copyright
#      notice, this list of conditions and the following disclaimer.
#    * 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.
#    * Neither the name of Hewlett-Packard Co. 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 OWNER OR CONTRIBUTORS
#    BE LIABLE FOR ANYDIRECT, 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.
#

TOPDIR ?= $(shell if [ "$$PWD" != "" ]; then echo $$PWD; else pwd; fi)

#
# Variables below overridable from command-line:
#   make VARNAME=value ...
#

#
# Where to install the package. GNU-EFI will create and access
# lib and include under the root
#
DESTDIR ?= /
ifeq ($(origin INSTALLROOT),undefined)
INSTALLROOT = $(DESTDIR)
endif

empty :=
space := $(empty) $(empty)
stripped = $(subst $(space),/,$(strip $(subst /,$(space),$(1))))
unstripped = $(subst $(space),/,$(subst /,$(space),$(1)))
is_absolute = $(subst $(call stripped,$(1)),$(empty),$(call unstripped,$(1)))

override INSTALLROOT:=$(if $(call is_absolute,$(INSTALLROOT)),,$(TOPDIR)/)$(INSTALLROOT)

PREFIX       := /usr/local
EXEC_PREFIX  := $(PREFIX)
LIBDIR       := $(EXEC_PREFIX)/lib
INCLUDEDIR   := $(PREFIX)/include
INSTALL      := install

# Compilation tools
HOSTCC       := $(prefix)gcc
CC           := $(prefix)$(CROSS_COMPILE)gcc
AS           := $(prefix)$(CROSS_COMPILE)as
LD           := $(prefix)$(CROSS_COMPILE)ld
AR           := $(prefix)$(CROSS_COMPILE)ar
RANLIB       := $(prefix)$(CROSS_COMPILE)ranlib
OBJCOPY      := $(prefix)$(CROSS_COMPILE)objcopy

# Set verbose or nonverbose output similarly to automake's silent rules.
# Default is nonverbose, but, just like with automake, it can be disabled
# with: 'make V=1'
ifneq ($(V),1)
  HIDE=@
  ECHO=echo
else
  HIDE=
  ECHO=true
endif

# Host/target identification
OS           := $(shell uname -s)
HOSTARCH     ?= $(shell $(HOSTCC) -dumpmachine | cut -f1 -d- | sed -e s,i[3456789]86,ia32, -e 's,armv[67].*,arm,' )
ARCH         ?= $(shell $(HOSTCC) -dumpmachine | cut -f1 -d- | sed -e s,i[3456789]86,ia32, -e 's,armv[67].*,arm,' )

# Get ARCH from the compiler if cross compiling 
ifneq ($(CROSS_COMPILE),)
  override ARCH := $(shell $(CC) -dumpmachine | cut -f1 -d-| sed -e s,i[3456789]86,ia32, -e 's,armv[67].*,arm,' )
endif

# FreeBSD (and possibly others) reports amd64 instead of x86_64
ifeq ($(ARCH),amd64)
  override ARCH := x86_64
endif

# Allow UEFI shorthands to be specified for the arch
ifeq ($(ARCH),x64)
  override ARCH := x86_64
endif
ifeq ($(ARCH),mips64)
  override ARCH := mips64el
endif

GCCVERSION   := $(shell $(CC) -dumpversion | sed -e 's/-win32/.0/' | cut -f1 -d.)
GCCMINOR     := $(shell $(CC) -dumpversion | sed -e 's/-win32/.0/' | cut -f2 -d.)
USING_CLANG  := $(shell $(CC) -v 2>&1 | grep -q 'clang version' && echo clang || echo 0)
USING_APPLE  ?= $(shell uname -s | grep -q 'Darwin' && echo 1 || echo 0)

# Rely on GCC MS ABI support?
GCCNEWENOUGH := $(shell ( [ $(GCCVERSION) -gt "4" ]           \
                          || ( [ $(GCCVERSION) -eq "4" ]      \
                          && [ $(GCCMINOR) -ge "7" ] ) ) \
                          && echo 1)

PART_ONE = $(shell echo "$(1)" | cut -f1 -d.)
PART_TWO = $(shell echo "$(1)" | cut -f2 -d.)

IS_NEW_ENOUGH = $(shell ( [ $(call PART_ONE,$(1)) -gt "$(2)" ] \
                          || ( [ $(call PART_ONE,$(1)) -eq "$(2)" ] \
                          && [ $(call PART_TWO,$(1)) -ge "$(3)" ] ) ) \
                          && echo 1)

#
# Where to build the package
#
OBJDIR       := $(TOPDIR)/$(ARCH)

#
# Variables below derived from variables above
#

# Arch-specific compilation flags
CPPFLAGS += -DCONFIG_$(ARCH)

CFLAGS += -Wno-error=pragmas

ifeq ($(ARCH),ia64)
  CFLAGS += -mfixed-range=f32-f127
endif

ifeq ($(ARCH),ia32)
  CFLAGS += -mno-mmx -mno-sse
  ifeq ($(HOSTARCH),x86_64)
    ARCH3264 = -m32
  endif
endif

# Set ISO C mode
CPPFLAGS += -std=c11

ifeq ($(ARCH),x86_64)
  ifeq ($(GCCNEWENOUGH),1)
    CPPFLAGS += -DGNU_EFI_USE_MS_ABI
    ifneq ($(USING_CLANG),clang)
      CPPFLAGS +=  -maccumulate-outgoing-args
    endif
  endif

  CFLAGS += -mno-red-zone
  ifeq ($(HOSTARCH),ia32)
    ARCH3264 = -m64
  endif
endif

ifneq (,$(filter $(ARCH),ia32 x86_64))
  # Disable AVX, if the compiler supports that.
  CC_CAN_DISABLE_AVX=$(shell $(CC) -Werror -c -o /dev/null -xc -mno-avx - </dev/null >/dev/null 2>&1 && echo 1)
  ifeq ($(CC_CAN_DISABLE_AVX), 1)
    CFLAGS += -mno-avx
  endif
endif

ifeq ($(ARCH),mips64el)
  CFLAGS += -march=mips64r2
  ARCH3264 = -mabi=64
endif

#
# Set HAVE_EFI_OBJCOPY if objcopy understands --target efi-[app|bsdrv|rtdrv],
# otherwise we need to compose the PE/COFF header using the assembler
#

OBJCOPY_VERSION := $(shell $(OBJCOPY) --version | head -n 1 | awk '{print $$(NF)}')

ifneq ($(ARCH),arm)
ifneq ($(ARCH),mips64el)
export HAVE_EFI_OBJCOPY=y
endif
endif

ifeq ($(ARCH),riscv64)
ifneq ($(call IS_NEW_ENOUGH,$(OBJCOPY_VERSION),2,42),1)
export SYSTEM_HAS_EFI_OBJCOPY ?= 0
endif
endif

ifeq ($(ARCH),aarch64)
ifneq ($(call IS_NEW_ENOUGH,$(OBJCOPY_VERSION),2,38),1)
export SYSTEM_HAS_EFI_OBJCOPY ?= 0
endif
endif

ifeq ($(ARCH),ia32)
ifeq ($(USING_APPLE),1)
export SYSTEM_HAS_EFI_OBJCOPY ?= 0
endif
endif

ifeq ($(HAVE_EFI_OBJCOPY),y)
export SYSTEM_HAS_EFI_OBJCOPY ?= 1
else
export SYSTEM_HAS_EFI_OBJCOPY ?= 0
endif


ifeq ($(USING_APPLE),1)
CFLAGS += -D__GNU_EFI_IS_APPLE
endif

ifeq ($(ARCH),arm)
CFLAGS += -marm
endif

ifneq (,$(filter $(ARCH),aarch64 arm loongarch64))
LDFLAGS += -z common-page-size=4096
LDFLAGS += -z max-page-size=4096
endif

# Generic compilation flags
INCDIR  += -I$(SRCDIR) -I$(TOPDIR)/inc -I$(TOPDIR)/inc/$(ARCH) \
           -I$(TOPDIR)/inc/protocol

# Only enable -fPIE for non MinGW compilers (unneeded on MinGW)
GCCMACHINE := $(shell $(CC) -dumpmachine)
IS_MINGW32 := $(findstring mingw32, $(GCCMACHINE))
ifeq ($(IS_MINGW32),)
  CFLAGS += -fPIE
endif

ifeq (FreeBSD, $(findstring FreeBSD, $(OS)))
CFLAGS  += $(ARCH3264) -g -O2 -Wall -Wextra -Werror \
           -fno-strict-aliasing \
           -ffreestanding -fno-stack-protector
else
CFLAGS  += $(ARCH3264) -g -O2 -Wall -Wextra -Wno-pointer-sign -Werror \
           -fno-strict-aliasing \
           -ffreestanding -fno-stack-protector -fno-stack-check \
           $(if $(findstring 0,$(USING_CLANG)),-Wno-error=maybe-uninitialized,) \
           $(if $(findstring 0,$(USING_CLANG)),-fno-merge-all-constants,)
endif

# Force DWARF 4 on LLVM
# Otherwise readelf becomes very unhappy
ifeq ($(USING_CLANG),clang)
CFLAGS += -gdwarf-4
endif

# Force hard float (for library mismatch)
ifeq ($(ARCH),arm)
ifeq ($(USING_APPLE),1)
CFLAGS += -mfloat-abi=hard -mfpu=vfpv2
endif
endif

ifeq ($(V),1)
ARFLAGS := rDv
else
ARFLAGS := rD
endif
ASFLAGS += $(ARCH3264)
LDFLAGS += -nostdlib 
ifeq ($(IS_MINGW32),)
  LDFLAGS += --warn-common --no-undefined --fatal-warnings \
             --build-id=sha1
  ifeq ($(USING_APPLE),0)
  LDFLAGS += -z norelro -z nocombreloc
  endif
else
  LDFLAGS += -Wl,--warn-common -Wl,--no-undefined -Wl,--fatal-warnings \
             -Wl,--build-id=sha1
endif

ifneq ($(ARCH),arm)
export LIBGCC=$(shell $(CC) $(CFLAGS) $(ARCH3264) -print-libgcc-file-name)
endif