#BUILDING MOSES
#
#PACKAGES
#Language models (optional):
#--with-irstlm=/path/to/irstlm 
#--with-srilm=/path/to/srilm See moses/src/LM/Jamfile for more options.
#--with-randlm=/path/to/randlm
#KenLM is always compiled.  
#
#--with-boost=/path/to/boost
#If Boost is in a non-standard location, specify it here.  This directory is
#expected to contain include and lib or lib64.  
#
#--with-xmlrpc-c=/path/to/xmlrpc-c for libxmlrpc-c (used by server)
#Note that, like language models, this is the --prefix where the library was
#installed, not some executable within the library.  
#
#--with-giza=/path/to/giza 
#Indicates where binaries GIZA++, snt2cooc.out, and mkcls live.  
#Builds scripts/training/train-model.perl using these paths. 
#
#Thread-caching malloc (optional):
#--with-tcmalloc
#
#REGRESSION TESTING
#--with-regtest=/path/to/moses-reg-test-data
#
#
#INSTALLATION
#--prefix=/path/to/prefix sets the install prefix [dist].
#--bindir=/path/to/prefix/bin sets the bin directory [PREFIX/bin]
#--libdir=/path/to/prefix/lib sets the lib directory [PREFIX/lib]
#--includedir=/path/to/prefix/include installs headers.  
#  Does not install if missing.  No argument defaults to PREFIX/include .
#--install-scripts=/path/to/scripts copies scripts into a directory.
#--git appends the git revision to the prefix directory.
#
#
#BUILD OPTIONS
# By default, the build is multi-threaded, optimized, and statically linked.  
# Pass these to change the build:
#
# threading=single|multi         controls threading (default multi)
#
# variant=release|debug|profile  builds optimized (default), for debug, or for
#                                profiling
#
# link=static|shared             controls linking (default static)
#
# debug-symbols=on|off           include (default) or exclude debugging
#                                information also known as -g
#
# --notrace                      compiles without TRACE macros
#
# --enable-boost-pool            uses Boost pools for the memory SCFG table
#
#
#CONTROLLING THE BUILD
#-a to build from scratch
#-j$NCPUS to compile in parallel
#--clean to clean

import option ;
import modules ;

path-constant TOP : . ;

# Shell with trailing line removed http://lists.boost.org/boost-build/2007/08/17051.php
rule trim-nl ( str extras * ) {
  return [ MATCH "([^
]*)" : $(str) ] $(extras) ;
}
rule _shell ( cmd : extras * ) {
  return [ trim-nl [ SHELL $(cmd) : $(extras) ] ] ;
}

local cleaning = [ option.get "clean" : : yes ] ;
cleaning ?= [ option.get "clean-all" : no : yes ] ;
if "clean" in [ modules.peek : ARGV ] {
  cleaning = yes ;
}
constant CLEANING : $(cleaning) ;

#Run g++ with empty main and these arguments to see if it passes.  
rule test_flags ( flags ) {
  if [ SHELL $(TOP)"/jam-files/test.sh "$(flags) ] = 0 {
    return true ;
  } else {
    return ;
  }
}

#Determine if a library can be compiled statically.  
rule auto_shared ( name : additional ? ) {
  additional ?= "" ;
  if [ test_flags $(additional)" -static -l"$(name) ] {
    return ;
  } else {
    return "<link>shared" ;
  }
}

with-boost = [ option.get "with-boost" ] ;
if $(with-boost) {
  L-boost-search = -L$(with-boost)/lib" "-L$(with-boost)/lib64 ;
  boost-search = <search>$(with-boost)/lib <search>$(with-boost)/lib64 ;
  I-boost-include = -I$(with-boost)/include ;
  boost-include = <include>$(with-boost)/include ;
} else {
  L-boost-search = "" ;
  boost-search = ;
  I-boost-include = "" ;
  boost-include = ;
}

boost-shell = [ SHELL "g++ "$(I-boost-include)" -dM -x c++ -E /dev/null -include boost/version.hpp 2>/dev/null |grep '#define BOOST_VERSION '" : exit-status ] ;
if $(boost-shell[2]) != 0 && $(CLEANING) = no {
  exit Boost does not seem to be installed or g++ is confused. : 1 ;
}
boost-version = [ MATCH "#define BOOST_VERSION ([0-9]*)" : $(boost-shell[1]) ] ;
if $(boost-version) < 103600 && $(cleaning) = no {
  exit You have Boost $(boost-version).  Moses requires at least 103600 (and preferably newer). : 1 ;
}
#Are we linking static binaries against shared boost?
boost-auto-shared = [ auto_shared "boost_program_options" : $(L-boost-search) ] ;
#Convenience rule for boost libraries.  Defines library boost_$(name).  
rule boost_lib ( name macro ) {
  #Link multi-threaded programs against the -mt version if available.  Old 
  #versions of boost do not have -mt tagged versions of all libraries.   Sadly,
  #boost.jam does not handle this correctly.  
  if [ test_flags $(L-boost-search)" -lboost_"$(name)"-mt" ] {
    lib inner_boost_$(name) : : <threading>single $(boost-search) <name>boost_$(name) ;
    lib inner_boost_$(name) : : <threading>multi $(boost-search) <name>boost_$(name)-mt ;
  } else {
    lib inner_boost_$(name) : : $(boost-search) <name>boost_$(name) ;
  }

  alias boost_$(name) : inner_boost_$(name) : $(boost-auto-shared) : : <link>shared:<define>BOOST_$(macro) $(boost-include) ;
}
#See tools/build/v2/contrib/boost.jam in a boost distribution for a table of macros to define.   
boost_lib thread THREAD_DYN_DLL ;
boost_lib program_options PROGRAM_OPTIONS_DYN_LINK ;
boost_lib unit_test_framework TEST_DYN_LINK ;

#Link normally to a library, but sometimes static isn't installed so fall back to dynamic.
rule external_lib ( name ) {
  lib $(name) : : [ auto_shared $(name) ] ;
}

external_lib z ;

requirements = ;

#libSegFault prints a stack trace on segfault.  Link against it if available.  
if [ test_flags "-lSegfault" ] {
  external_lib SegFault ;
  requirements += <library>SegFault ;
}

if [ option.get "with-tcmalloc" : : "yes" ] {
  external_lib tcmalloc ;
  requirements += <library>tcmalloc ;
}

requirements += [ option.get "notrace" : <define>TRACE_ENABLE=1 ] ;
requirements += [ option.get "enable-boost-pool" : : <define>USE_BOOST_POOL ] ;

import os ;

cxxflags = [ os.environ "CXXFLAGS" ] ;
cflags = [ os.environ "CFLAGS" ] ;
ldflags = [ os.environ "LDFLAGS" ] ;

project : default-build
  <threading>multi
  <warnings>on
  <debug-symbols>on
  <variant>release
  <link>static
  ;

project : requirements 
  <threading>multi:<define>WITH_THREADS
  <threading>multi:<library>boost_thread
  <define>_FILE_OFFSET_BITS=64 <define>_LARGE_FILES
  $(requirements)
  <cxxflags>$(cxxflags)
  <cflags>$(cflags)
  <linkflags>$(ldflags)
  ;

#Add directories here if you want their incidental targets too (i.e. tests).
build-project lm ; 
build-project util ;
#Trigger instllation into legacy paths.  
build-project mert ;
build-project moses-cmd/src ;
build-project moses-chart-cmd/src ;
#Scripts have their own binaries.
build-project scripts ;
#Regression tests (only does anything if --with-regtest is passed)
build-project regression-testing ;

if [ option.get "git" : : "yes" ] {
  local revision = [ _shell "git rev-parse --verify HEAD |head -c 7" ] ;
  constant GITTAG : "/"$(revision) ;
} else {
  constant GITTAG : "" ;
}

alias programs : lm//query lm//build_binary moses-chart-cmd/src//moses_chart moses-cmd/src//programs OnDiskPt//CreateOnDisk mert//programs contrib/server//mosesserver misc//programs ;

prefix = [ option.get "prefix" : $(TOP)/dist$(GITTAG) ] ;
bindir = [ option.get "bindir" : $(prefix)/bin ] ;
libdir = [ option.get "libdir" : $(prefix)/lib ] ;
install prefix-bin : programs : <location>$(bindir) <install-dependencies>on <install-type>EXE <link>shared:<dll-path>$(libdir) ;
install prefix-lib : programs : <location>$(libdir) <install-dependencies>on <install-type>LIB <link>shared:<dll-path>$(libdir) ;

includedir = [ option.get "includedir" : : $(prefix)/include ] ;
if $(includedir) {
  install prefix-header : [ glob-tree *.h *.hh : jam-files dist kenlm moses ] : <location>$(includedir) <install-source-root>. ;
  install prefix-moses-header : moses/src//headers-to-install : <location>$(includedir) <install-source-root>moses/src ;
}