# Generic Makefile for NetBeans for C/C++ projects
# Copyright (C) 2025 Benny Lyons  
# 
# This program 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
# of the License, or (at your option) any later version.
# 
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.


#
# Uses the variable NETBEANSBUILD which is added to _both_ the compile flags
# and the link process. Without this option Netbeans will not recognise the
# binary, so it is not possible to debug the binary in NetBeans.
# If you obtain the NetBeans error 'Not an ELF Binary', or something similar,
# then using $(NETBEANSBUILD) will most likely fix this.
#


# Change this to the name of your application, programme
# or the name of the binary this makefile produces 
APP = myapp

# C++ compiler
#CXX:=clang++
CXX := g++ 


#
# NETBEANSBUILD
#
# Netbeans does not recognise an executable to debug out of the box.
# You must instruct the compiler to produce Platform Independent Code by
# using -no-pie. PIE is required to use Address Space Layout Randomization
# (ASLR), which is a security feature, which Netbeans cannot currently use.
# 
# To fix, add the following option to CFLAGS and LDFLAGS
#            -no-pie
NETBEANSBUILD := -no-pie 

ifeq ($(MAKECMDGOALS),debug)
	DBG_REL :=-ggdb3
else
        DBG_REL :=
endif

#
# OS dependent flags
#
OS := $(shell uname -s)
ifeq ($(UNAME_S),Linux)
	# installed by system and in PATH
	CPPCHECK := cppcheck
	DBG_REL +=
endif
# OpenIndiana and flavours
ifeq ($(UNAME_S),SunOS)
	# local installation
	CPPCHECK := $(HOME)/devl/cppcheck/bin/cppcheck
	DBG_REL +=
endif


SRC_DIR := src
OBJ_DIR := obj
SRC := $(wildcard $(SRC_DIR)/*.cpp)

OBJS := $(patsubst $(SRC_DIR)/%.cpp,$(OBJ_DIR)/%.o,$(SRC))

##
## Add checks and issue warnings
##
# -Wall -Wextra                  # turn on all warnings.
# -Wconversion -Wsign-conversio  # warn on unsign/sign conversions.
# -Wformat-security              # warn onformat functions that might be a security issue
# -Werror                        # deactivate this initially? convert all warnings into errors.
# -march=x86-64                  # take max advantage of address space (important for ASLR;
#                                # more virtual address space to chose from when randomising layout).
# -fstack-protector-all          # 
# -Wstack-protector              # 
# --param ssp-buffer-size=4      # 
# -ftrapv                        # generate traps for signed overflow (currently bugged in gcc)
# -D_FORTIFY_SOURCE=2 -O2        # buffer overflow check. -D_FORTIFY_SOURCE=1 also possible 
# -Wfloat-equal                  # testing floating-point numbers for equality is usually bad
# -Wpointer-arith                # warn if anything depends upon the size of a function or of void
_CXXFLAGS=-Wall -Wextra \
        -Wconversion -Wsign-conversion \
        -march=x86-64 \
        -Wformat-security \
        -fstack-protector-all -Wstack-protector --param ssp-buffer-size=4 \
        -ftrapv \
        -D_FORTIFY_SOURCE=2 -O2 \
        -Wfloat-equal \
        -Wpointer-arith 


CXXFLAGS = $(NETBEANSBUILD) $(DBG_REL) $(_CXXFLAGS) 
LIBS = $(NETBEANSBUILD)

# Uncomment one of the following to select an output format
#CHECKFLAGS = --template="{file},{line},{severity},{id},{message}" 
CHECKFLAGS = --quiet --enable=all --error-exitcode=1 
#CHECKFLAGS =  --enable=all --error-exitcode=1 

debug release:  DIRS $(APP)
check: cppcheck.out


$(APP): $(OBJS)
	$(CXX) -o bin/$@  $^ $(LIBS) 
$(OBJ_DIR)/%.o: $(SRC_DIR)/%.cpp
	$(CXX) $(CXXFLAGS) -o $@  -c $<

DIRS: obj bin
	mkdir  -p obj bin

cppcheck.out: $(SRC)
	$(info output to cppcheck.out)
	$(CPPCHECK) $(CHECKFLAGS) $^  > $@ 2>&1

.PHONY: clean 
clean:
	$(info cleaning up)
	@rm -f $(APP) $(OBJ_DIR)/*  ./bin/$(APP) cppcheck.out
	@if [ -d "./bin" ]; then rmdir ./bin ; fi
	@if [ -d "./obj" ]; then rmdir ./obj ; fi