#  Copyright (c) 2003 Michael Stevens
#  Copyright (c) 2011 Bryce Lelbach
#
#  Use, modification and distribution is subject to the Boost Software
#  License Version 1.0. (See accompanying file LICENSE.txt or
#  https://www.bfgroup.xyz/b2/LICENSE.txt)

import toolset ;
import toolset : flags ;

import common ;
import errors ;
import feature ;
import gcc ;
import generators ;
import intel ;
import numbers ;
import os ;
import path ;
import regex ;
import type ;

feature.extend-subfeature toolset intel : platform : linux ;

toolset.inherit-generators intel-linux
     <toolset>intel <toolset-intel:platform>linux : gcc : gcc.mingw.link gcc.mingw.link.dll ;
generators.override intel-linux.prebuilt : builtin.lib-generator ;
generators.override intel-linux.prebuilt : builtin.prebuilt ;
generators.override intel-linux.searched-lib-generator : searched-lib-generator ;

# Override default do-nothing generators.
generators.override intel-linux.compile.c.pch   : pch.default-c-pch-generator   ;
generators.override intel-linux.compile.c++.pch : pch.default-cpp-pch-generator ;

type.set-generated-target-suffix PCH : <toolset>intel <toolset-intel:platform>linux : pchi ;

toolset.inherit-rules intel-linux : gcc ;
toolset.inherit-flags intel-linux : gcc
        : <inlining>off <inlining>on <inlining>full
          <optimization>space <optimization>speed
          <optimization>minimal <optimization>debug
          <warnings>off <warnings>all <warnings>on
          <warnings>extra <warnings>pedantic
          <warnings-as-errors>off <warnings-as-errors>on
        ;

if [ MATCH (--debug-configuration) : [ modules.peek : ARGV ] ]
{
    .debug-configuration = true ;
}

.home = [ os.home-directories ] ;
.home = $(.home[1]) ;

# Intel oneAPI 2020, and onward.
.bin(oneAPI) =
    [ path.join $(.home) intel/oneapi/compiler/latest/linux/bin ]
    /opt/intel/oneapi/compiler/latest/linux/bin ;
# Intel C++ Composer XE 2011 for Linux, aka Intel C++ Compiler XE 12.0,
# aka intel-linux-12.0.
.bin(12.0) = /opt/intel/bin ;
# Intel C++ Compiler 11.1.
.bin(11.1) = /opt/intel_cce_11.1.064.x86_64/bin ;
# Intel C++ Compiler 11.0.
.bin(11.0) = /opt/intel_cce_11.0.074.x86_64/bin ;
# Intel C++ Compiler 10.1.
.bin(10.1) = /opt/intel_cce_10.1.013_x64/bin ;
# Intel C++ Compiler 9.1.
.bin(9.1) = /opt/intel_cc_91/bin ;
# Intel C++ Compiler 9.0.
.bin(9.0) = /opt/intel_cc_90/bin ;
# Intel C++ Compiler 8.1.
.bin(8.1) = /opt/intel_cc_81/bin ;
# Intel C++ Compiler 8.0.
.bin(8.0) = /opt/intel_cc_80/bin ;

rule init ( version ? :  command * : options * )
{
    local user_version = [ MATCH "([0-9.]+)" : $(version) ] ;
    local user_command = $(command) ;
    if $(user_version)
    {
        user_version = [ regex.split $(user_version) "[.]" ] ;
    }

    local command_lib_path ;
    local detected_version ;
    local detected_command ;
    local command_abs_path ;
    if ! $(user_version) && ! $(user_command)
    {
        # If nothing given, try and discover the latest toolset available.
        if ! $(detected_command)
        {
            local bin_paths = $(.bin(oneAPI)) ;
            detected_command = [ common.find-tool icpx : $(bin_paths) ] ;
            if $(detected_command)
            {
                command_abs_path = [ common.get-absolute-tool-path $(detected_command) ] ;
                command_lib_path = $(command_abs_path)/../compiler/lib/intel64 ;
            }
        }
        if ! $(detected_command)
        {
            local bin_paths = $(.bin(12.0)) $(.bin(11.1)) $(.bin(11.0)) ;
            detected_command = [ common.find-tool icpc : $(bin_paths) ] ;
            if $(detected_command)
            {
                command_abs_path = [ common.get-absolute-tool-path $(detected_command) ] ;
                command_lib_path = $(command_abs_path)/../lib/x86_64 ;
            }
        }
        if ! $(detected_command)
        {
            local bin_paths = $(.bin(10.1)) $(.bin(9.1)) $(.bin(9.0))
                $(.bin(8.1)) $(.bin(8.0)) ;
            detected_command = [ common.find-tool icpc : $(bin_paths) ] ;
            if $(detected_command)
            {
                command_abs_path = [ common.get-absolute-tool-path $(detected_command) ] ;
                command_lib_path = $(command_abs_path)/../lib ;
            }
        }
        if $(detected_command)
        {
            local version_cmd = "LD_LIBRARY_PATH=$(command_lib_path) $(detected_command) --version" ;
            local version_output = [ SHELL $(version_cmd) ] ;
            detected_version = [ MATCH "([0-9.]+)" : $(version_output) ] ;
        }
    }
    else if $(user_command)
    {
        # If only a command given, determine the version from the command.
        # Note, we assume that the user command does everything needed to
        # property execute the command.
        local version_cmd = $(user_command:J=" ") ;
        local version_output = [ SHELL "$(version_cmd) --version" ] ;
        detected_command = $(user_command) ;
        detected_version = [ MATCH "([0-9.]+)" : $(version_output) ] ;
    }
    else if $(user_version)
    {
        # Only version given, try and find the command in the location for the version.
        if [ numbers.less $(user_version[1]) 2020 ]
        {
            local version_xy = $(user_version[1]) $(user_version[2]) ;
            local bin_paths = $(.bin($(version_xy:J=.))) ;
            if $(bin_paths)
            {
                detected_command = [ common.find-tool icpc : $(bin_paths) : path-last ] ;
                command_abs_path = [ common.get-absolute-tool-path $(detected_command) ] ;
            }
            if [ numbers.less $(user_version[1]) 11 ]
            {
                command_lib_path = $(command_abs_path)/../lib ;
            }
            else
            {
                command_lib_path = $(command_abs_path)/../lib/x86_64 ;
            }
        }
        else
        {
            detected_command = [ common.find-tool icpx
                : [ regex.replace-list $(.bin(oneAPI)) : "latest" : $(user_version:J=.) ]
                : path-last ] ;
            command_abs_path = [ common.get-absolute-tool-path $(detected_command) ] ;
            command_lib_path = $(command_abs_path)/../compiler/lib/intel64 ;
        }
        if $(detected_command)
        {
            local version_cmd = "LD_LIBRARY_PATH=$(command_lib_path) $(detected_command) --version" ;
            local version_output = [ SHELL $(version_cmd) ] ;
            detected_version = [ MATCH "([0-9.]+)" : $(version_output) ] ;
        }
    }

    if $(.debug-configuration)
    {
        ECHO "notice: intel-linux command is" $(command:E=$(detected_command)) ;
    }

    version ?= $(detected_version) ;
    local condition = [ common.check-init-parameters intel-linux : version $(version) ] ;

    if $(.debug-configuration)
    {
        ECHO "notice: intel-linux version is" $(version) ;
    }

    command ?= $(detected_command) ;
    common.handle-options intel-linux : $(condition) : $(command) : $(options) ;

    local tool_version = $(detected_version) ;
    if $(tool_version)
    {
        tool_version = [ regex.split $(tool_version) "[.]" ] ;
    }
    tool_version ?= $(user_version) ;

    if [ numbers.less $(tool_version[1]) 10 ]
    {
        flags intel-linux.compile OPTIONS $(condition)/<inlining>off : "-Ob0" ;
        flags intel-linux.compile OPTIONS $(condition)/<inlining>on : "-Ob1" ;
        flags intel-linux.compile OPTIONS $(condition)/<inlining>full : "-Ob2" ;
        flags intel-linux.compile OPTIONS $(condition)/<optimization>space : "-O1" ;
        flags intel-linux.compile OPTIONS $(condition)/<optimization>speed : "-O3 -ip" ;
    }
    else if [ numbers.less $(tool_version[1]) 11 ]
    {
        flags intel-linux.compile OPTIONS $(condition)/<inlining>off : "-inline-level=0" ;
        flags intel-linux.compile OPTIONS $(condition)/<inlining>on : "-inline-level=1" ;
        flags intel-linux.compile OPTIONS $(condition)/<inlining>full : "-inline-level=2" ;
        flags intel-linux.compile OPTIONS $(condition)/<optimization>space : "-O1" ;
        flags intel-linux.compile OPTIONS $(condition)/<optimization>speed : "-O3 -ip" ;
    }
    else # newer version of intel do have -Os (at least 11+, don't know about 10)
    {
        flags intel-linux.compile OPTIONS $(condition)/<inlining>off : "-inline-level=0" ;
        flags intel-linux.compile OPTIONS $(condition)/<inlining>on : "-inline-level=1" ;
        flags intel-linux.compile OPTIONS $(condition)/<inlining>full : "-inline-level=2" ;
        flags intel-linux.compile OPTIONS $(condition)/<optimization>space : "-Os" ;
        flags intel-linux.compile OPTIONS $(condition)/<optimization>speed : "-O3 -ip" ;
    }
    if [ numbers.less $(tool_version[1]) 2020 ]
    {
        flags intel-linux.compile OPTIONS <warnings>off : -w0 ;
        flags intel-linux.compile OPTIONS <warnings>on : -w1 ;
        flags intel-linux.compile OPTIONS <warnings>all : -w2 ;
        flags intel-linux.compile OPTIONS <warnings>extra : -w3 ;
        flags intel-linux.compile OPTIONS <warnings>pedantic : -w3 -Wcheck ;
        flags intel-linux.compile OPTIONS <warnings-as-errors>on : -Werror-all ;
    }
    else
    {
        flags intel-linux.compile OPTIONS <warnings>off : -w ;
        flags intel-linux.compile OPTIONS <warnings>on : -Wall ;
        flags intel-linux.compile OPTIONS <warnings>all : -Wall ;
        flags intel-linux.compile OPTIONS <warnings>extra : -Wall ;
        flags intel-linux.compile OPTIONS <warnings>pedantic : -Wall ;
        flags intel-linux.compile OPTIONS <warnings-as-errors>on : -Werror-all ;
    }
    if $(.debug-configuration)
    {
        ECHO notice\: using intel libraries "::" $(condition) "::" $(command_lib_path) ;
    }
    flags intel-linux.compile RUN_PATH $(condition) : $(command_lib_path) ;
    flags intel-linux.link RUN_PATH $(condition) : $(command_lib_path) ;
}

_ = " " ;

rule compile.c++ ( targets * : sources * : properties * )
{
    DEPENDS $(<) : [ on $(<) return $(PCH_FILE) ] ;
}

actions compile.c++ bind PCH_FILE
{
    LD_LIBRARY_PATH="$(RUN_PATH)" "$(CONFIG_COMMAND)" -c -xc++ $(OPTIONS) $(USER_OPTIONS) -D$(DEFINES) -I"$(INCLUDES)"  -use-pch"$(PCH_FILE)" -c -o "$(<)" "$(>)"
}

rule compile.c ( targets * : sources * : properties * )
{
    DEPENDS $(<) : [ on $(<) return $(PCH_FILE) ] ;
}

actions compile.c bind PCH_FILE
{
    LD_LIBRARY_PATH="$(RUN_PATH)" "$(CONFIG_COMMAND)" -c -xc $(OPTIONS) $(USER_OPTIONS) -D$(DEFINES) -I"$(INCLUDES)" -use-pch"$(PCH_FILE)" -c -o "$(<)" "$(>)"
}

#
# Compiling a pch first deletes any existing *.pchi file, as Intel's compiler
# won't over-write an existing pch: instead it creates filename$1.pchi, filename$2.pchi
# etc - which appear not to do anything except take up disk space :-(
#
actions compile.c++.pch
{
    rm -f "$(<)" && LD_LIBRARY_PATH="$(RUN_PATH)" "$(CONFIG_COMMAND)" -x c++-header $(OPTIONS) $(USER_OPTIONS) -D$(DEFINES) -I"$(INCLUDES)" -c -pch-create "$(<)" "$(>)"
}

actions compile.fortran
{
    LD_LIBRARY_PATH="$(RUN_PATH)" "ifort" -c $(OPTIONS) $(USER_OPTIONS) -D$(DEFINES) -I"$(INCLUDES)" -c -o "$(<)" "$(>)"
}

actions compile.c.pch
{
    rm -f "$(<)" && LD_LIBRARY_PATH="$(RUN_PATH)" "$(CONFIG_COMMAND)" -x c-header $(OPTIONS) $(USER_OPTIONS) -D$(DEFINES) -I"$(INCLUDES)" -c -pch-create "$(<)" "$(>)"
}

rule link ( targets * : sources * : properties * )
{
    _ on $(targets) = " " ;
}

actions link bind LIBRARIES
{
    LD_LIBRARY_PATH="$(RUN_PATH)" "$(CONFIG_COMMAND)" -L"$(LINKPATH)" -Wl,-R$(_)-Wl,"$(RPATH)" -Wl,-rpath-link$(_)-Wl,"$(RPATH_LINK)" -o "$(<)" "$(>)" "$(LIBRARIES)" -l$(FINDLIBS-SA) -l$(FINDLIBS-ST) $(OPTIONS) $(USER_OPTIONS)
}

rule link.dll ( targets * : sources * : properties * )
{
    _ on $(targets) = " " ;
}

# Differ from 'link' above only by -shared.
actions link.dll bind LIBRARIES
{
    LD_LIBRARY_PATH="$(RUN_PATH)" "$(CONFIG_COMMAND)" -L"$(LINKPATH)" -Wl,-R$(_)-Wl,"$(RPATH)" -o "$(<)" -Wl,-soname$(_)-Wl,$(<[1]:D=) -shared "$(>)"  "$(LIBRARIES)" -l$(FINDLIBS-SA) -l$(FINDLIBS-ST) $(OPTIONS) $(USER_OPTIONS)
}