# Hey Emacs, this is a -*- makefile -*-
#
#   Copyright (C) 2009-2013 The Paparazzi Team
#
# This file is part of paparazzi.
#
# paparazzi 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 2, or (at your option)
# any later version.
#
# paparazzi 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 paparazzi; see the file COPYING.  If not, write to
# the Free Software Foundation, 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
#

#
# Makefile for generic linux targets
# Normally don't use this makefile directly, but rather Makefile.arm-linux or Makefile.bbb
#

# Define some default programs and commands (if not already set by e.g. Makefile.arm-linux
CC  ?= gcc
CXX ?= g++
LD  ?= $(CC)

# Launch with "make Q=''" to get full command display
Q=@

OPT ?= 3
# Slightly bigger .elf files but gains the ability to decode macros
DEBUG_FLAGS ?= -ggdb3
CSTANDARD ?= -std=gnu99
CINCS = $(INCLUDES) -I$(PAPARAZZI_SRC)/sw/include

#
# Common compiler flags.
# add then to arch specific CFLAGS already defined in e.g. Makefile.arm-linux
#
CFLAGS += $(CINCS)
CFLAGS += -O$(OPT) -fPIC
CFLAGS += $(DEBUG_FLAGS)
CFLAGS += -fno-short-enums
# CFLAGS += -malignment-traps
CFLAGS += -Wall -Wcast-qual -Wimplicit -Wcast-align
CFLAGS += -Wpointer-arith -Wswitch
CFLAGS += -Wredundant-decls -Wreturn-type -Wshadow -Wunused
#-Wno-unused-result
#CFLAGS += -Wa,-adhlns=$(OBJDIR)/$(notdir $(subst $(suffix $<),.lst,$<))
#CFLAGS += $(patsubst %,-I%,$(EXTRAINCDIRS))

CFLAGS += -lm -pthread

# flags only for C
CFLAGS += -Wstrict-prototypes -Wmissing-declarations
CFLAGS += -Wmissing-prototypes -Wnested-externs
CFLAGS += $(CSTANDARD)
CFLAGS += $($(TARGET).CFLAGS)
CFLAGS += $(USER_CFLAGS)

LDFLAGS += -lm -pthread

CXXFLAGS += -O$(OPT) -fPIC
CXXFLAGS += $(DEBUG_FLAGS)
CXXFLAGS += -pipe -fshow-column -ffast-math
CXXFLAGS += -g -ffunction-sections -fdata-sections
CXXFLAGS += -Wall -Wextra
CXXFLAGS += $($(TARGET).CXXFLAGS)
CXXFLAGS += $(USER_CFLAGS)

SRC_C_LINUX  = $($(TARGET).srcs)
OBJ_C_LINUX = $(SRC_C_LINUX:%.c=$(OBJDIR)/%.o)

SRC_CPP_LINUX  = $($(TARGET).cpp_srcs)
OBJ_CPP_LINUX = $(SRC_CPP_LINUX:%.cpp=$(OBJDIR)/%.o)

printcommands:
	@echo ""
	@echo "Using CC   = $(CC)"
#	@echo "Using LD   = $(LD)"
	@echo "GCC version:"
	@$(CC) --version | head -1
	@echo ""

all: printcommands build

build: $(OBJDIR) elf

$(OBJDIR):
	@echo CREATING object dir $(OBJDIR)
	@test -d $(OBJDIR) || mkdir -p $(OBJDIR)

elf: $(OBJDIR)/$(TARGET).elf

# Link: create ELF output file from object files.
.SECONDARY : $(OBJDIR)/$(TARGET).elf
.PRECIOUS :   $(OBJ_C_LINUX) $(OBJ_CPP_LINUX)
%.elf:   $(OBJ_C_LINUX) $(OBJ_CPP_LINUX)
	@echo LD $@
	$(Q)if (expr "$($(TARGET).cpp_srcs)"); \
		  then $(CXX) $(CXXFLAGS) $(OBJ_CPP_LINUX) $(OBJ_C_LINUX) --output $@ $(LDFLAGS) $($(TARGET).LDFLAGS); \
		  else $(CC) $(CFLAGS) $(OBJ_C_LINUX) --output $@ $(LDFLAGS) $($(TARGET).LDFLAGS); fi

# Compile: create object files from C source files
$(OBJDIR)/%.o : %.c $(OBJDIR)/../Makefile.ac
	@echo CC $@
	$(Q)test -d $(dir $@) || mkdir -p $(dir $@)
	$(Q)$(CC) -MMD -c $(CFLAGS) $< -o $@

# Compile: create object files from C++ source files
$(OBJDIR)/%.o : %.cpp $(OBJDIR)/../Makefile.ac
	@echo CXX $@
	$(Q)test -d $(dir $@) || mkdir -p $(dir $@)
	$(Q)$(CXX) -MMD -c $(CXXFLAGS) $< -o $@


# Listing of phony targets.
.PHONY : printcommands all build elf

.NOTPARALLEL: printcommands

#
# Dependencies
#
ifneq ($(MAKECMDGOALS),clean)
DEPS = $(addprefix $(OBJDIR)/,$($(TARGET).srcs:.c=.d))
DEPS += $(addprefix $(OBJDIR)/,$($(TARGET).srcs:.cpp=.d))
-include $(DEPS)
endif