############################################################################
# configs/px4fmu-v2_updstream/nsh/Make.defs
#
#   Copyright (C) 2011 Gregory Nutt. All rights reserved.
#   Author: Gregory Nutt <gnutt@nuttx.org>
#
# 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 NuttX 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 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.
#
############################################################################

include ${TOPDIR}/.config
include ${TOPDIR}/tools/Config.mk
include ${TOPDIR}/arch/arm/src/armv7-m/Toolchain.defs

CC = $(CROSSDEV)gcc
CXX = $(CROSSDEV)g++
CPP = $(CROSSDEV)gcc -E
LD = $(CROSSDEV)ld
AR = $(CROSSDEV)ar rcs
NM = $(CROSSDEV)nm
OBJCOPY = $(CROSSDEV)objcopy
OBJDUMP = $(CROSSDEV)objdump

ARCHCPUFLAGS = -mcpu=cortex-m4 \
    -mthumb \
    -march=armv7e-m \
    -mfpu=fpv4-sp-d16 \
    -mfloat-abi=hard

# Pull in *just* libm from the toolchain ... this is grody

LIBM = "${shell $(CC) $(ARCHCPUFLAGS) -print-file-name=libm.a}"
EXTRA_LIBS += $(LIBM)

# Use our linker script

LDSCRIPT = ld.script

ifeq ($(WINTOOL),y)
  # Windows-native toolchains
  DIRLINK = $(TOPDIR)/tools/copydir.sh
  DIRUNLINK = $(TOPDIR)/tools/unlink.sh
  MKDEP = $(TOPDIR)/tools/mknulldeps.sh
  ARCHINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}"
  ARCHXXINCLUDES = -I. -isystem "${shell cygpath -w $(TOPDIR)/include}" -isystem "${shell cygpath -w $(TOPDIR)/include/cxx}"
  ARCHSCRIPT = -T "${shell cygpath -w $(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)}"
else
  ifeq ($(PX4_WINTOOL),y)
    # Windows-native toolchains (MSYS)
    DIRLINK = $(TOPDIR)/tools/copydir.sh
    DIRUNLINK = $(TOPDIR)/tools/unlink.sh
    MKDEP = $(TOPDIR)/tools/mknulldeps.sh
    ARCHINCLUDES = -I. -isystem $(TOPDIR)/include
    ARCHXXINCLUDES = -I. -isystem $(TOPDIR)/include -isystem $(TOPDIR)/include/cxx
    ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)
  else
    # Linux/Cygwin-native toolchain
    MKDEP = $(TOPDIR)/tools/mkdeps.sh
    ARCHINCLUDES = -I. -isystem $(TOPDIR)/include
    ARCHXXINCLUDES = -I. -isystem $(TOPDIR)/include -isystem $(TOPDIR)/include/cxx
    ARCHSCRIPT = -T$(TOPDIR)/configs/$(CONFIG_ARCH_BOARD)/scripts/$(LDSCRIPT)
  endif
endif

# Tool versions

ARCHCCVERSION = ${shell $(CC) -v 2>&1 | sed -n '/^gcc version/p' | sed -e 's/^gcc version \([0-9\.]\)/\1/g' -e 's/[-\ ].*//g' -e '1q'}
ARCHCCMAJOR = ${shell echo $(ARCHCCVERSION) | cut -d'.' -f1}

# Optimization flags

ARCHOPTIMIZATION = $(MAXOPTIMIZATION) \
    -fno-strict-aliasing \
    -fno-strength-reduce \
    -fomit-frame-pointer \
    -funsafe-math-optimizations \
    -fno-builtin-printf \
    -ffunction-sections \
    -fdata-sections

ifeq ("${CONFIG_DEBUG_SYMBOLS}","y")
ARCHOPTIMIZATION += -g
endif

ARCHCFLAGS = -std=gnu99
ARCHCXXFLAGS = -fno-exceptions -fno-rtti -std=gnu++0x
ARCHWARNINGS = -Wall \
    -Wextra \
    -Wdouble-promotion \
    -Wshadow \
    -Wfloat-equal \
    -Wframe-larger-than=1024 \
    -Wpointer-arith \
    -Wlogical-op \
    -Wmissing-declarations \
    -Wpacked \
    -Wno-unused-parameter
#   -Wcast-qual  - generates spurious noreturn attribute warnings, try again later
#   -Wconversion - would be nice, but too many "risky-but-safe" conversions in the code
#   -Wcast-align - would help catch bad casts in some cases, but generates too many false positives

ARCHCWARNINGS = $(ARCHWARNINGS) \
    -Wbad-function-cast \
    -Wstrict-prototypes \
    -Wold-style-declaration \
    -Wmissing-parameter-type \
    -Wmissing-prototypes \
    -Wnested-externs
ARCHWARNINGSXX = $(ARCHWARNINGS) \
    -Wno-psabi
ARCHDEFINES =
ARCHPICFLAGS = -fpic -msingle-pic-base -mpic-register=r10

# This seems to be the only way to add linker flags

EXTRA_LIBS += --warn-common \
    --gc-sections

CFLAGS = $(ARCHCFLAGS) $(ARCHCWARNINGS) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHINCLUDES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe -fno-common
CPICFLAGS = $(ARCHPICFLAGS) $(CFLAGS)
CXXFLAGS = $(ARCHCXXFLAGS) $(ARCHWARNINGSXX) $(ARCHOPTIMIZATION) $(ARCHCPUFLAGS) $(ARCHXXINCLUDES) $(INSTRUMENTATIONDEFINES) $(ARCHDEFINES) $(EXTRADEFINES) -pipe
CXXPICFLAGS = $(ARCHPICFLAGS) $(CXXFLAGS)
CPPFLAGS = $(ARCHINCLUDES) $(INSTRUMENTATIONDEFINES) $(ARCHDEFINES) $(EXTRADEFINES)
AFLAGS = $(CFLAGS) -D__ASSEMBLY__

NXFLATLDFLAGS1 = -r -d -warn-common
NXFLATLDFLAGS2 = $(NXFLATLDFLAGS1) -T$(TOPDIR)/binfmt/libnxflat/gnu-nxflat.ld -no-check-sections
LDNXFLATFLAGS = -e main -s 2048

OBJEXT = .o
LIBEXT = .a
EXEEXT =

# Produce partially-linked $1 from files in $2

define PRELINK
 @echo "PRELINK: $1"
 $(Q) $(LD) -Ur -o $1 $2 && $(OBJCOPY) --localize-hidden $1
endef

HOSTCC = gcc
HOSTINCLUDES = -I.
HOSTCFLAGS = -Wall -Wstrict-prototypes -Wshadow -g -pipe
HOSTLDFLAGS =
