# Copyright 2017, pEp Foundation

# This file is part of pEpEngine

# This file may be used under the terms of the GNU General Public License version 3

# see LICENSE.txt

# This file gives an overview over all the parameters that can be easily customized for a build.

# There are three ways in which you can customize your build:

# 1) Edit the variable assignments in this file

# 2) Create `local.conf` and fill it with variable assignments.

#    These `local.conf` takes precedence over the assignments below.

# 3) Set the environment variable `BUILD_CONFIG` to an absolute path.

#    The variable assignments found at the path indicated by `BUILD_CONFIG` take precedence over the assignments below and the assignments in `local.conf`.

# If nothing is changed according to these 3 methods, a default configuration for your platform will be used for the build.

HERE:=$(dir $(lastword $(MAKEFILE_LIST)))

######### General #########

# To use (only) system libraries, set all the *_INC and *_LIB variables to the empty string.

# All the *_INC and *_LIB variables are command line flags, not paths.

# Thus, all *_INC variables' values must start with "-I", and all *_LIB variables' values must start with "-L".

BUILD_ON:=$(shell uname)

# This variable specifies the platform that the engine should be cross-compiled for.

BUILD_FOR=$(BUILD_ON)

# Cross-compiling is currently not supported.

# Maybe you can hack something with `local.conf`.

ifneq ($(BUILD_ON),$(BUILD_FOR))

    $(error I don't know how to build for $(BUILD_FOR) on $(BUILD_ON).)

endif

# Installation path prefix for libraries and binaries, except for system.db

PREFIX=$(HOME)

# Installation path for system.db

SYSTEM_DB=/usr/local/share/pEp/system.db

# Filename of the pEpEngine library

ifeq ($(BUILD_FOR),Linux)

    TARGET=libpEpEngine.so

else ifeq ($(BUILD_FOR),Darwin)

    TARGET=libpEpEngine.dylib

endif

# If empty, create a release build.

# Otherwise, create a debug build.

# This variable is ineffective in your local.conf file.

DEBUG=YES

# If empty, suppress compiler warnings.

# Otherwise, print warnings.

# This variable is ineffective in your local.conf file.

WARN=placeholder

######### C and C++ #########

TARGET_ARCH=

# The following two variables will be appended to.

# You can thus not set them to a fixed value here.

ifeq ($(BUILD_FOR),Linux)

    LDFLAGS=

else ifeq ($(BUILD_FOR),Darwin)

    # "-bind_at_load" helps find symbol resolution errors faster

    LDFLAGS=-bind_at_load

endif

LDLIBS=

######### C #########

ifeq ($(BUILD_FOR),Linux)

    CC=gcc -std=c99 -pthread

else ifeq ($(BUILD_FOR),Darwin)

    # clang issues a warning when "-pthread" is used for linking.

    # So, include it in CFLAGS, and not in CC

    CC=clang -std=c99

endif

ifeq ($(BUILD_FOR),Linux)

    CFLAGS=-fPIC -fstrict-aliasing -fdiagnostics-color=always

else ifeq ($(BUILD_FOR),Darwin)

    CFLAGS=-pthread -fPIC -fstrict-aliasing -fcolor-diagnostics

endif

CPPFLAGS=

# The flag -DNDEBUG will always be removed from CFLAGS for compiling tests.

# The tests do not work properly, if compiled with -DNDEBUG

ifeq ($(BUILD_FOR),Linux)

    ifdef WARN

        CFLAGS+= -Wall -pedantic -Wstrict-aliasing=3

    else

        CFLAGS+= -w

    endif

    ifdef DEBUG

        CFLAGS+= -Og -ggdb -DDEBUG_ERRORSTACK

    else

        CFLAGS+= -O3 -DNDEBUG

    endif

else ifeq ($(BUILD_FOR),Darwin)

    ifdef WARN

        # FIXME Remove 'no-extended-offsetof' after ENGINE-236 is closed.

        CFLAGS+= -Wall -pedantic -Wno-extended-offsetof

    else

        CFLAGS+= -w

    endif

    ifdef DEBUG

        CFLAGS+= -O0 -g -DDEBUG_ERRORSTACK

    else

        CFLAGS+= -O3 -DNDEBUG

    endif

endif

# Additional CFLAGS used for compiling ASN1C-generated code

ifeq ($(BUILD_FOR),Linux)

    # The '_DEFAULT_SOURCE' feature test macro is required to suppress the warning

    #   _BSD_SOURCE and _SVID_SOURCE are deprecated, use _DEFAULT_SOURCE

    # otherwise printed during the compilation of every asn1c-generated C file.

    # It's a glibc specific warning, only present in few versions around ~2.19.

    # See https://lwn.net/Articles/590381/ for a discussion.

    CFLAGS_GENERATED=-D_DEFAULT_SOURCE

else ifeq ($(BUILD_FOR),Darwin)

    CFLAGS_GENERATED=

endif

######### C++ #########

ifeq ($(BUILD_FOR),Linux)

    CXX=g++ -std=gnu++11 -pthread

else ifeq ($(BUILD_FOR),Darwin)

    # clang issues a warning when "-pthread" is used for linking. So, include it in CXXFLAGS, and not in CXX

    CXX=clang -std=c++11

endif

# The flag -DNDEBUG will always be removed from CXXFLAGS for compiling tests.

# The tests do not work properly, if compiled with -DNDEBUG

ifeq ($(BUILD_FOR),Linux)

    CXXFLAGS=-fdiagnostics-color=always -I../src -I../asn.1 $(ETPAN_INC)

    ifdef WARN

        CXXFLAGS+=

    else

        CXXFLAGS+= -w

    endif

    ifdef DEBUG

        CXXFLAGS+= -Og -ggdb

    else

        CXXFLAGS+= -O3 -DNDEBUG

    endif

else ifeq ($(BUILD_FOR),Darwin)

    CXXFLAGS=-pthread -fcolor-diagnostics -I../src -I../asn.1 $(ETPAN_INC)

    ifdef WARN

        CXXFLAGS+=

    else

        CXXFLAGS+= -w

    endif

    ifdef DEBUG

        CXXFLAGS+= -O0 -g

    else

        CXXFLAGS+= -O3 -DNDEBUG

    endif

endif

######### YML2 #########

YML2_PATH=$(HOME)/yml2

YML2_PROC=$(YML2_PATH)/yml2proc

YML2_OPTS=--encoding=utf8

export YML_PATH=$(YML2_PATH)

######### asn1c #########

# asn1c binary

ASN1C=asn1c

# asn1c include search flag

ASN1C_INC=

#ASN1C_INC=-I$(HOME)/include

######### libetpan #########

# libetpan library search flag

ETPAN_LIB=-L$(PREFIX)/lib

# libetpan include search flag

ETPAN_INC=-I$(PREFIX)/include

######### sqlite3 #########

# If empty (or undefined), compile sqlite3 from the sources shipped with the pEp distribution.

# Otherwise, use an sqlite3 implementation found in the OS's include/library paths.

SQLITE3_FROM_OS=placeholder

######### OpenPGP #########

# Path of GPG binary

# gpgconf is not available for old version of GPG, for example GPG 2.0.30. Override this variable, if you compile the engine for such an old version.

GPG_CMD:=$(shell gpgconf --list-components | awk -F: '/^gpg:/ { print $$3; exit 0; }')

# Selects OpenPGP implementation. must be either `GPG` or `NETPGP`

OPENPGP=GPG

# Path of libGPGME binary

ifeq ($(BUILD_FOR),Linux)

    LIBGPGME=libgpgme.so.11

else ifeq ($(BUILD_FOR),Darwin)

    LIBGPGME=libgpgme.dylib

endif

# libGPGME library search flag

ifeq ($(BUILD_FOR),Linux)

    GPGME_LIB=

else ifeq ($(BUILD_FOR),Darwin)

    GPGME_LIB=-L$(HOME)/lib

endif

# libGPGME include search flag

ifeq ($(BUILD_FOR),Linux)

    GPGME_INC=

else ifeq ($(BUILD_FOR),Darwin)

    GPGME_INC=-I$(HOME)/include

endif

# NETPGP library search flag

NETPGP_LIB=

#NETPGP_LIB=-L$(PREFIX)/lib

# libGPGME include search flag

NETPGP_INC=

#NETPGP_INC=-I$(PREFIX)/include

######### Engine internals #########

# C macros (not environment variables) that can be overridden:

# DEFAULT_KEYSERVER - string with default keyserver

# CRASHDUMP_DEFAULT_LINES - number of log lines to deliver for crashdumps

# Example:

#    EXTRA_MACROS=-DDEFAULT_KEYSERVER=\"default-server.org\" -DCRASHDUMP_DEFAULT_LINES=23

EXTRA_MACROS=

######### Misc #########

# FIXME Maybe include these variables here.

# Check how they are used throughout the project before setting them here

#LLDB_BIN

-include $(HERE)/local.conf

ifdef BUILD_CONFIG

    -include $(BUILD_CONFIG)

endif