# Copyright René Ferdinand Rivera Morell 2023-2024
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)

import feature ;
import os ;
import property ;

feature.feature segmented-stacks : on : optional propagated composite ;
feature.compose <segmented-stacks>on : <define>BOOST_USE_SEGMENTED_STACKS ;

feature.feature htm : tsx : optional propagated composite ;
feature.compose <htm>tsx : <define>BOOST_USE_TSX ;

feature.feature valgrind : on : optional propagated composite ;
feature.compose <valgrind>on : <define>BOOST_USE_VALGRIND ;

rule default_binary_format ( properties * )
{
    local tmp = elf ;
    local target-os = [ property.select <target-os> : $(properties) ] ;

    if $(target-os)
    {
        if <target-os>windows in $(properties) { tmp = pe ; }
        else if <target-os>cygwin in $(properties) { tmp = pe ; }
        else if <target-os>aix in $(properties) { tmp = xcoff ; }
        else if <target-os>darwin in $(properties) { tmp = mach-o ; }
        else if <target-os>iphone in $(properties) { tmp = mach-o ; }
        else if <target-os>appletv in $(properties) { tmp = mach-o ; }
        else if <target-os>watchos in $(properties) { tmp = mach-o ; }
        # else: android, linux, freebsd, solaris, qnx, vxworks, ... -> elf
    }
    else
    {
        if [ os.name ] = "NT" { tmp = pe ; }
        else if [ os.name ] = "CYGWIN" { tmp = pe ; }
        else if [ os.name ] = "AIX" { tmp = xcoff ; }
        else if [ os.name ] = "MACOSX" { tmp = mach-o ; }
    }
    return <binary-format>$(tmp) ;
}

feature.feature binary-format
   : elf
     mach-o
     pe
     xcoff
   : propagated
   ;
feature.set-default binary-format : elf ;

rule default_abi ( properties * )
{
    local tmp = sysv ;
    local arch = [ property.select <architecture> : $(properties) ] ;

    if <target-os>windows in $(properties) { tmp = ms ; }
    else if <target-os>cygwin in $(properties) { tmp = ms ; }
    else if [ os.name ] = "NT" { tmp = ms ; }
    else if [ os.name ] = "CYGWIN" { tmp = ms ; }
    else if $(arch)
    {
        if <architecture>arm in $(properties) { tmp = aapcs ; }
        else if <architecture>mips in $(properties)
        {
            if <address-model>64 in $(properties) { tmp = n64 ; }
            else { tmp = o32 ; }
        }
    }
    else
    {
        # Avoid using "in" operator here: it returns true if its left
        # part is empty, which happens e.g. with os.platform on
        # some uncommon architectures.
        if [ os.platform ] = "ARM" { tmp = aapcs ; }
        else if [ os.platform ] = "ARM64" { tmp = aapcs ; }
        else if [ os.platform ] = "MIPS32" { tmp = o32 ; }
        else if [ os.platform ] = "MIPS64" { tmp = n64 ; }
    }
    return <abi>$(tmp) ;
}

feature.feature abi
   : aapcs
     eabi
     ms
     n32
     n64
     o32
     o64
     sysv
     x32
   : propagated
   ;
feature.set-default abi : sysv ;

feature.feature context-impl
    : fcontext
      ucontext
      winfib
    : propagated
      composite
    ;
feature.set-default context-impl : fcontext ;
feature.compose <context-impl>ucontext : <define>BOOST_USE_UCONTEXT ;
feature.compose <context-impl>winfib : <define>BOOST_USE_WINFIB ;