# Configuration Makefile
#
# Part of the Routino routing software.
#
# This file Copyright 2013-2015, 2017, 2018, 2020 Andrew M. Bishop
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

# Automatic operating system detection

UNAME=$(shell uname)

HOST=UNIX

ifneq ($(findstring CYGWIN,$(UNAME)),)
  HOST=CYGWIN
endif

ifneq ($(findstring MINGW,$(UNAME)),)
  HOST=MINGW
endif


# Simplify handling of executable targets ending in .exe

ifeq ($(HOST),MINGW)
  .EXE=.exe
else
  .EXE=
endif


# Installation locations (edit if required)

ifneq ($(HOST),MINGW)
  prefix=/usr/local
  bindir=$(prefix)/bin
  incdir=$(prefix)/include
  libdir=$(prefix)/lib
  docdir=$(prefix)/doc/routino
  datadir=$(prefix)/share/routino
else
  prefix="c:/Program Files/Routino"
  bindir=$(prefix)/bin
  incdir=$(prefix)/include
  libdir=$(prefix)/lib
  docdir=$(prefix)/doc
  datadir=$(prefix)/xml
endif


# Library version for ABI compatibility
SOVERSION=0

# Full library version (SOVERSION.MINOR[.RELEASE])
LIBVERSION=$(SOVERSION).0.0


# Compilation programs
CC=gcc
CXX=g++
LD=gcc

ifdef CLANG
  ifeq ($(CLANG),1)
    CC=clang
    CXX=clang++
    LD=clang
  endif
endif

# Maths library
LDFLAGS=-lm

# Language dialect selection
CFLAGS=-std=c99

# Warning options
CFLAGS+=-Wall -Wmissing-prototypes -Wextra -Wno-unused-parameter -pedantic

ifdef CLANG
  ifeq ($(CLANG),1)
    CFLAGS+=-Wno-missing-field-initializers
  endif
endif

# Optimisation options
CFLAGS+=-O3

# Fast maths option - makes test cases fail slightly
CFLAGS+=-ffast-math
ifdef FASTMATHS
  ifeq ($(FASTMATHS),0)
    CFLAGS+=-fno-fast-math
  endif
endif

# Optimisation option (only works if compilation and execution use exactly the same CPU architecture).
#CFLAGS+=-march=native

# Compile with debugging symbols
CFLAGS+=-g

# Option for compiling with sanitizer for debugging memory addresses and undefined behaviour
ifdef SANITIZE
  ifeq ($(SANITIZE),1)
    CFLAGS+=-fsanitize=address -fsanitize=leak -fsanitize=undefined
    LDFLAGS+=-fsanitize=address -fsanitize=leak -fsanitize=undefined
  endif
endif

# Option for compiling with profiling for checking execution times
ifdef PROFILE
  ifeq ($(PROFILE),1)
    CFLAGS+=-pg
    LDFLAGS+=-pg
  endif
endif

# Option for compiling with coverage for checking execution times and unused code
ifdef COVERAGE
  ifeq ($(COVERAGE),1)
    CFLAGS+=--coverage
    LDFLAGS+=--coverage
  endif
endif


# Extra flags for compiling libroutino shared library (visibility of symbols, shared)
CFLAGS_LIB=-fvisibility=hidden
LDFLAGS_LIB=-shared

# Extra flags for compiling libroutino shared library (position independent code)
ifeq ($(HOST),UNIX)
  CFLAGS_LIB+=-fPIC
  LDFLAGS_LIB+=-fPIC
endif

# Extra flags for compiling libroutino shared library (SONAME)
ifeq ($(HOST),UNIX)
  LDFLAGS_SONAME=-Wl,-soname=libroutino.so.$(SOVERSION)
  LDFLAGS_SLIM_SONAME=-Wl,-soname=libroutino-slim.so.$(SOVERSION)
endif

# Put the current directory in the shared library path for the router using libroutino
LDFLAGS_LDSO=-Wl,-R.


# Required for multi-threaded support (comment these two lines out if not required)
CFLAGS+=-pthread -DUSE_PTHREADS
LDFLAGS+=-pthread -lpthread


# Required for bzip2 support (comment these two lines out if not required)
ifneq ($(HOST),MINGW)
  CFLAGS+=-DUSE_BZIP2
  LDFLAGS+=-lbz2
endif


# Required for gzip support (comment these two lines out if not required)
CFLAGS+=-DUSE_GZIP
LDFLAGS+=-lz


# Required for xz support (uncomment these two lines if required)
#CFLAGS+=-DUSE_XZ
#LDFLAGS+=-llzma


# Required to use stdio with files > 2GiB on 32-bit system.
CFLAGS+=-D_FILE_OFFSET_BITS=64


# Required to compile on Linux without a warning about pread() and pwrite() functions.
ifneq ($(HOST),MINGW)
  CFLAGS+=-D_POSIX_C_SOURCE=200809L
endif