# 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

 # See `doc/build-<your platform>.md` for documentation on how to build, and customize your build.

 # This file sets all the make variables that allow you to customize a build.

 # There are 3 ways in which you can customize your build:

 # 1) Edit the variable assignments in this file (this is a tracked file, so your repository will be dirty)

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

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

 #    The variable assignments found in the make file at the path indicated by `BUILD_CONFIG` will be evaluated.

 # Customization options are applied in the order given above. Later variable assignments take precedence over earlier ones.

 # It is possible to use multiple variants simultaniously.

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

 ######### Header #########

 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 when set anywhere else but here.

 DEBUG=placeholder

 # If empty, suppress compiler warnings.

 # Otherwise, print warnings.

 # This variable is ineffective when set anywhere else but here.

 WARN=placeholder

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

 TARGET_ARCH=

 # The following two variables will be appended to.

 # You can thus not set them to a final, 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

 # 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+= -g -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+= -g -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

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

 CPPFLAGS=

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

 YML2_PATH=$(HOME)/yml2

 YML2_PROC=$(YML2_PATH)/yml2proc $(YML2_OPTS)

 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=

 #ETPAN_LIB=-L$(HOME)/lib

 # libetpan include search flag

 ETPAN_INC=

 #ETPAN_INC=-I$(HOME)/include

 ######### pEp MIME #########

 # set this to skip libetpan and use PEP_MIME instead

 # PEP_MIME=1

 #

 # pEp MIME library search flag

 PEP_MIME_LIB=

 # pEp MIME include search flag

 PEP_MIME_INC=

 ######### 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 `SEQUOIA`, `GPG` or `NETPGP`

 OPENPGP=GPG

 # Sequoia-specific variables

 SEQUOIA_CFLAGS=

 SEQUOIA_LDFLAGS=

 SEQUOIA_LIB=

 SEQUOIA_INC=

 # libGPGME filename

 ifeq ($(BUILD_FOR),Linux)

     LIBGPGME=libgpgme.so.11

 else ifeq ($(BUILD_FOR),Darwin)

     LIBGPGME=libgpgme.11.dylib

 endif

 # libGPGME library search flag

 GPGME_LIB=

 #GPGME_LIB=-L$(HOME)/lib

 # libGPGME include search flag

 GPGME_INC=

 #GPGME_INC=-I$(HOME)/include

 # NETPGP library search flag

 NETPGP_LIB=

 #NETPGP_LIB=-L$(HOME)/lib

 # libGPGME include search flag

 NETPGP_INC=

 #NETPGP_INC=-I$(HOME)/include

 ######### CppUnit #########

 # CppUnit library search flag

 CPPUNIT_LIB=

 #CPPUNIT_LIB=-L$(HOME)/local/lib

 # CppUnit include search flag

 CPPUNIT_INC=

 #CPPUNIT_INC=-I$(HOME)/local/inc

 ######### 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

 # Add this for running tests in debugger

 #TEST_DEBUGGER=lldb --batch -o r

 # comma-separated list of tests to exclude from gensuite (relevant for running tests only)

 EXCLUDE=

 ######### Footer #########

 -include $(HERE)/local.conf

 ifdef BUILD_CONFIG

     include $(BUILD_CONFIG)

 endif

 ######### Post processing assignments ########

 # These variables are ineffective when set anywhere else but here.

 ifeq ($(OPENPGP),SEQUOIA)

     SEQUOIA_CFLAGS=$(shell pkg-config --cflags-only-other sequoia-openpgp)

     SEQUOIA_LDFLAGS=$(shell pkg-config --libs-only-l --libs-only-other sequoia-openpgp)

     SEQUOIA_LIB=$(shell pkg-config --libs-only-L sequoia-openpgp)

     SEQUOIA_INC=$(shell pkg-config --cflags-only-I sequoia-openpgp)

     CFLAGS+= $(SEQUOIA_CFLAGS)

     LD_FLAGS+= $(SEQUOIA_LDFLAGS)

 endif

 # YML_PATH is needed in the environment of every call to a program of the YML2 distribution

 export YML_PATH=$(YML2_PATH)