# 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 override.conf file.

 DEBUG=YES

 # If empty, suppress compiler warnings.

 # Otherwise, print warnings.

 # This variable is ineffective in your override.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=c11 -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=c11

 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

 ######### 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

 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