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# configure.host

# This shell script handles all host based configuration for newlib.
# It sets various shell variables based on the the host and the
# configuration options.  You can modify this shell script without
# needing to rerun autoconf.

# This shell script should be invoked as
#   . configure.host
# If it encounters an error, it will exit with a message.

# FIXME: This script is too complicated.  It does things in too many
# different ways.  This was taken from the old Cygnus configure script
# with only minor changes.  It should be cleaned up.

# FIXME: The general approach of picking and choosing which
# directories to configure, other than machine_dir and sys_dir, is
# potentially confusing.

# It uses the following shell variables:
#   host                The configuration host
#   host_cpu            The configuration host CPU
#   newlib_mb           --enable-newlib-mb ("yes", "no")
#   target_optspace     --enable-target-optspace ("yes", "no", "")

# It sets the following shell variables:
#   newlib_cflags       Special CFLAGS to use when building
#   machine_dir         Subdirectory of libc/machine to configure
#   sys_dir             Subdirectory of libc/sys to configure
#   posix_dir           "posix" to build libc/posix, "" otherwise
#   signal_dir          "signal" to build libc/signal, "" otherwise
#   syscall_dir         "syscalls" to build libc/syscalls, "" otherwise
#   unix_dir            "unix" to build libc/unix, "" otherwise
#   use_libtool         flag: use libtool to build newlib?
#   aext                library extension - needed for libtool support
#   oext                object file extension - needed for libtool support

newlib_cflags=
libm_machine_dir=
machine_dir=
sys_dir=
posix_dir=
signal_dir=signal
syscall_dir=
unix_dir=
mach_add_setjmp=
use_libtool=no
aext=a
oext=o

case "${target_optspace}:${host}" in
  yes:*)
    newlib_cflags="${newlib_cflags} -Os"
    ;;
  :m32r-* | :d10v-* | :d30v-* | :avr-*)
    newlib_cflags="${newlib_cflags} -Os"
    ;;
  no:* | :*)
    newlib_cflags="${newlib_cflags} -O2"
    ;;
esac

# Get the source directories to use for the CPU type.
# machine_dir should supply CPU dependent routines, such as setjmp.
# newlib_cflags is passed to gcc when compiling.
# THIS TABLE IS ALPHA SORTED.  KEEP IT THAT WAY.

case "${host_cpu}" in
  a29k)
        machine_dir=a29k
        ;;
  arc)
        machine_dir=
        ;;
  arm)
        machine_dir=arm
        ;;
  avr*)
        newlib_cflags="${newlib_cflags} -DPREFER_SIZE_OVER_SPEED -mcall-prologues"
        ;;

  d10v*)
        machine_dir=d10v
        ;;
  d30v*)
        machine_dir=d30v
        ;;
  fr30)
        machine_dir=fr30
        ;;
  h8300)
        machine_dir=h8300
        ;;
  h8500)
        machine_dir=h8500
        ;;
  hppa*)
        machine_dir=hppa
        ;;
  i960)
        machine_dir=i960
        ;;
  i[3456]86)
        # Don't use for these since they provide their own setjmp.
        case ${host} in
        *-*-go32 | *-*-sco* | *-*-cygwin*) 
                libm_machine_dir=i386
                machine_dir=i386
                ;;
        *) 
                libm_machine_dir=i386
                machine_dir=i386
                mach_add_setjmp=true
                ;;
        esac
        ;;
  ia64*)
        ;;
  m32r*)
        machine_dir=m32r
        ;;
  m68*)
        machine_dir=m68k
        ;;
  m88k)
        machine_dir=m88k
        newlib_cflags="${newlib_cflags} -m88000"
        ;;
  m88110)
        machine_dir=m88k
        newlib_cflags="${newlib_cflags} -m88110"
        ;;
  mcore)
        ;;
  mips*)
        machine_dir=mips
        ;;
  mmix)
        ;;
  mn10200)
        machine_dir=mn10200
        ;;
  mn10300)
        machine_dir=mn10300
        ;;
  or16)
        ;;
  or32)
        ;;
  powerpc*)
        machine_dir=powerpc
        ;;
  sh)
        machine_dir=sh
        ;;
  sparc*)
        machine_dir=sparc
        # FIXME: Might wish to make MALLOC_ALIGNMENT more generic.
        newlib_cflags="${newlib_cflags} -DMALLOC_ALIGNMENT=8"
        ;;
  strongarm)
        machine_dir=arm
        ;;
  xscale)
        machine_dir=xscale
        ;;
  thumb)
        machine_dir=arm
        ;;
  tic80*)
        machine_dir=tic80
        ;;
  v70)
        ;;
  v810)
        ;;
  v850)
        machine_dir=v850
        newlib_cflags="${newlib_cflags} -DPREFER_SIZE_OVER_SPEED -mv850 "
        ;;
  v850e)
        machine_dir=v850
        newlib_cflags="${newlib_cflags} -DPREFER_SIZE_OVER_SPEED -mv850 "
        ;;
  v850ea)
        machine_dir=v850
        newlib_cflags="${newlib_cflags} -DPREFER_SIZE_OVER_SPEED -mv850 "
        ;;
  w65*)
        machine_dir=w65
        ;;
  z8k)
        machine_dir=z8k
        ;;
  *)
        echo '***' "Newlib does not support CPU ${host_cpu}" 1>&2
        exit 1
        ;;
esac

# Enable multibyte support if requested.

if [ "${newlib_mb}" = "yes" ] ; then
        newlib_cflags="${newlib_cflags} -DMB_CAPABLE"
fi

# Verify if shared newlib support is allowed and set appropriate variables
# We don't want to use libtool for platforms that we are not going to
# support shared libraries.  This is because it adds executable tests which
# we don't want for most embedded platforms.
case "${host}" in
  i[3456]86-pc-linux-*)
    use_libtool=yes
    oext=lo
    aext=la ;;
  *) ;; #shared library not supported for ${host}
esac

# Get the source directories to use for the host.  unix_dir is set
# to unix to get some standard Unix routines.  posix_dir is set to get some
# standard Posix routines.  sys_dir should supply system dependent routines
# including crt0.
# THIS TABLE IS ALPHA SORTED.  KEEP IT THAT WAY.

case "${host}" in
  *-*-cygwin*)
        sys_dir=cygwin
        posix_dir=posix
        ;;
  *-*-netware*)
        signal_dir=
        sys_dir=netware
        ;;
  *-*-rtems*)                   # generic RTEMS support
        sys_dir=rtems
        # RTEMS POSIX support is all inside RTEMS
        ;;
  a29k-*-*)
        sys_dir=a29khif
        signal_dir=
        ;;
  arc-*-*)
        sys_dir=arc
        ;;
  arm-*-*)
        sys_dir=arm 
        ;;
  d10v*)
        sys_dir=d10v
        ;;
  d30v*)
        sys_dir=
        ;;
  h8300-*-hms*)
        sys_dir=h8300hms
        ;;
  h8300-*-elf*)
        sys_dir=h8300hms
        ;;
  h8300-*-xray*)
        sys_dir=h8300xray
        ;;
  h8500-*-hms*)
        sys_dir=h8500hms
        ;;
  h8500-*-elf*)
        sys_dir=h8500hms
        ;;
  i[3456]86-*-go32)
        sys_dir=go32
        ;;
  i[3456]86-*-sco*)
        sys_dir=sysvi386
        unix_dir=unix
        ;;
  i[3456]86-pc-linux-*)
        sys_dir=linux
        unix_dir=unix
        posix_dir=posix
        gcc_dir=`gcc -print-search-dirs | awk '/^install:/{print $2}'`
        #newlib_cflags="${newlib_cflags} -Werror" # DEBUGGING ONLY;BREAKS BUILD
        newlib_cflags="${newlib_cflags} -Wall"
        newlib_cflags="${newlib_cflags} -D_I386MACH_ALLOW_HW_INTERRUPTS"
        newlib_cflags="${newlib_cflags} -D_LOOSE_KERNEL_NAMES -DHAVE_FCNTL"
        # --- Required when building a shared library ------------------------
        newlib_cflags="${newlib_cflags} -fPIC -D_I386MACH_NEED_SOTYPE_FUNCTION"
        # --- The three lines below are optional ------------------------------
        ##newlib_cflags="${newlib_cflags} -nostdinc"
        ##newlib_cflags="${newlib_cflags} -I`newlib-flags --kernel-dir`/include"
        ##newlib_cflags="${newlib_cflags} -idirafter ${gcc_dir}include"
        ;;
  m68k-sun-sunos*)
        unix_dir=unix
        ;;
  m8*-bug-*)
        sys_dir=m88kbug
        ;;
  mips*-dec-*)
        sys_dir=decstation
        ;;
  mmix-knuth-mmixware)
        sys_dir=mmixware
        ;;
  powerpcle-*-pe)
        sys_dir=cygwin
        posix_dir=posix
        ;;
  sh*-*)
        sys_dir=sh
        ;;
  sparc-sun-sunos*)
        sys_dir=sun4
        unix_dir=unix
        ;;
  sparc64*)
        sys_dir=sparc64
        unix_dir=unix
        ;;
  strongarm-*-*)
        sys_dir=arm 
        ;;
  xscale-*-*)
        sys_dir=arm 
        ;;
  thumb-*-*)
        sys_dir=arm 
        ;;
  tic80*)
        sys_dir=tic80
        ;;
  v70-nec-*)
        sys_dir=sysvnecv70
        ;;
  v810-*-*)
        sys_dir=sysnec810
        ;;
  v850-*-*)
        sys_dir=sysnecv850
        ;;
  v850e-*-*)
        sys_dir=sysnecv850
        ;;
  v850ea-*-*)
        sys_dir=sysnecv850
        ;;
  w65-*-*)
        sys_dir=w65
        ;;
  z8k-*-coff)
        sys_dir=z8ksim
        ;;
esac

# Host specific flag settings -- usually for features that are not
# general enough or broad enough to be handled above.
# THIS TABLE IS ALPHA SORTED.  KEEP IT THAT WAY.

case "${host}" in
  *-*-cygwin*)
        newlib_cflags="${newlib_cflags} -DHAVE_OPENDIR -DHAVE_RENAME -DSIGNAL_PROVIDED -DWANT_IO_LONG_DBL -DWANT_PRINTF_LONG_LONG -D_COMPILING_NEWLIB -DHAVE_FCNTL"
# CYGWIN provides its own malloc if --enable-malloc-debugging is set
        if [ "x${malloc_debugging}" = "xyes" ] ; then
          newlib_cflags="${newlib_cflags} -DMALLOC_PROVIDED"
        fi
        syscall_dir=syscalls
        ;;
# RTEMS supplies its own versions of some routines:
#       malloc()            (reentrant version)
#       exit()              RTEMS has a "global" reent to flush
#       signal()/raise()    RTEMS has its own including pthread signals
#       _XYZ_r()            RTEMS has its own reentrant routines
#
#  NOTE: When newlib malloc uses a semaphore, RTEMS will switch to that.
  *-*-rtems*)
        newlib_cflags="${newlib_cflags} -DHAVE_GETTIMEOFDAY -DMALLOC_PROVIDED -DEXIT_PROVIDED -DMISSING_SYSCALL_NAMES -DSIGNAL_PROVIDED -DREENTRANT_SYSCALLS_PROVIDED -DHAVE_OPENDIR -DNO_EXEC -DWANT_PRINTF_LONG_LONG -DHAVE_FCNTL"
        ;;
# VxWorks supplies its own version of malloc, and the newlib one
# doesn't work because VxWorks does not have sbrk.
  *-wrs-vxworks*)
        newlib_cflags="${newlib_cflags} -DMALLOC_PROVIDED -DMISSING_SYSCALL_NAMES -DHAVE_FCNTL"
        ;;
# UDI doesn't have exec, so system() should fail the right way
  a29k-amd-udi)
        newlib_cflags="${newlib_cflags} -DNO_EXEC"
        syscall_dir=syscalls
        ;;
  arc-*-*)
        syscall_dir=syscalls
        ;;
  arm-*-pe)
        syscall_dir=syscalls
        newlib_cflags="${newlib_cflags} -DABORT_PROVIDED -DHAVE_GETTIMEOFDAY"
# Don't use the debugging protocols just yet.
        ;;
  arm-*-*)
        syscall_dir=syscalls
        newlib_cflags="${newlib_cflags} -DABORT_PROVIDED -DHAVE_GETTIMEOFDAY"
# Select which debug protocol is being used.
# ARM_RDP_MONITOR selects the Demon monitor.
# ARM_RDI_MONITOR selects the Angel monitor.
# If neither are defined, then hard coded defaults will be used
# to create the program's environment.
# See also thumb below.
#       newlib_cflags="${newlib_cflags} -DARM_RDP_MONITOR"
        newlib_cflags="${newlib_cflags} -DARM_RDI_MONITOR"
        ;;
  avr*)
        newlib_cflags="${newlib_cflags} -DNO_EXEC -DSMALL_MEMORY -DMISSING_SYSCALL_NAMES"
        ;;
  d10v*)
        newlib_cflags="${newlib_cflags} -DSMALL_MEMORY"
        syscall_dir=syscalls
        ;;
  d30v*)
        newlib_cflags="${newlib_cflags} -DABORT_MESSAGE -DSMALL_MEMORY -DMISSING_SYSCALL_NAMES"
        syscall_dir=
        ;;
  fr30-*-*)
        newlib_cflags="${newlib_cflags}"
        syscall_dir=syscalls
        ;;
  h8300*-*-*)
        syscall_dir=syscalls    
        newlib_cflags="${newlib_cflags} -DSMALL_DTOA -DSMALL_MEMORY"
        ;;      
  h8500-*-*)
        syscall_dir=syscalls    
        newlib_cflags="${newlib_cflags} -DSMALL_DTOA -DSMALL_MEMORY"
        ;;      
  i[3456]86-*-sco*)
        newlib_cflags="${newlib_cflags} -DSIGNAL_PROVIDED -DHAVE_FCNTL"
        ;;
  i[3456]86-*-netware*)
        newlib_cflags="${newlib_cflags} -DMISSING_SYSCALL_NAMES -DNO_EXEC -DABORT_PROVIDED -DCLOCK_PROVIDED -DMALLOC_PROVIDED -DHAVE_FCNTL"
        ;;
  i[3456]86-*-go32)
        newlib_cflags="${newlib_cflags} -DMISSING_SYSCALL_NAMES -DNO_EXEC -DHAVE_FCNTL"
        ;;
  m32r-*-*)
        # Pass -msdata=sdata so _impure_ptr goes in .sdata.
        # We don't generate sda relocs however for upward compatibility.
        # FIXME: This is necessary because the default multilib doesn't
        # use --print-multi-lib.
        newlib_cflags="${newlib_cflags} -msdata=sdata"
        syscall_dir=syscalls
        ;;
  mcore-*-*)
        newlib_cflags="${newlib_cflags}"
        syscall_dir=syscalls
        ;;
  mmix-*)
        syscall_dir=syscalls
        # We need every symbol 32-bit aligned, so the invalid
        # construct with attribute ((alias ("_ctype_b+127"))) breaks.
        newlib_cflags="${newlib_cflags} -DCOMPACT_CTYPE"
        ;;
  mn10?00-*-*)
        syscall_dir=syscalls
        ;;
  powerpc*-*-eabi* | \
  powerpc*-*-elf* | \
  powerpc*-*-linux* | \
  powerpc*-*-rtem* | \
  powerpc*-*-sysv* | \
  powerpc*-*-solaris*)
        newlib_cflags="${newlib_cflags} -mrelocatable-lib -mno-eabi -mstrict-align -DMISSING_SYSCALL_NAMES"
        ;;
  powerpcle-*-pe)
        newlib_cflags="${newlib_cflags} -DHAVE_OPENDIR -DHAVE_RENAME -DHAVE_FCNTL"
        syscall_dir=syscalls
        ;;
  sh*-*-*)
        newlib_cflags="${newlib_cflags} -DHAVE_GETTIMEOFDAY"
        syscall_dir=syscalls
        ;;
  sparc-sun-sunos*)
        newlib_cflags="${newlib_cflags} -DSIGNAL_PROVIDED"
        ;;
  sparc64-*-*)
        newlib_cflags="${newlib_cflags} -DREENTRANT_SYSCALLS_PROVIDED -DHAVE_BLKSIZE -DHAVE_GETTIMEOFDAY -DHAVE_FCNTL"
        # This either belongs elsewhere or nowhere. But I need *something*,
        # so for now it's here ...
        case "${host_os}" in
          aoutv8 | *32p)
                newlib_cflags="${newlib_cflags} -DTARGET_PTR_SIZE=32" ;;
          *)
                newlib_cflags="${newlib_cflags} -DTARGET_PTR_SIZE=64" ;;
        esac
        ;;
  strongarm-*-*)
        syscall_dir=syscalls
        newlib_cflags="${newlib_cflags} -DABORT_PROVIDED -DHAVE_GETTIMEOFDAY"
        newlib_cflags="${newlib_cflags} -DARM_RDI_MONITOR"
        ;;
  xscale-*-*)
        syscall_dir=syscalls
        newlib_cflags="${newlib_cflags} -DABORT_PROVIDED -DHAVE_GETTIMEOFDAY"
        newlib_cflags="${newlib_cflags} -DARM_RDI_MONITOR"
        ;;
  thumb-*-pe)
        syscall_dir=syscalls
        newlib_cflags="${newlib_cflags} -DABORT_PROVIDED -DHAVE_GETTIMEOFDAY"
# Don't use the debugging protocols just yet.
        ;;
  thumb-*-*)
        syscall_dir=syscalls
        newlib_cflags="${newlib_cflags} -DABORT_PROVIDED -DHAVE_GETTIMEOFDAY"
# Select which debug protocol is being used.
# ARM_RDP_MONITOR selects the Demon monitor.
# ARM_RDI_MONITOR selects the Angel monitor.
# If neither are defined, then hard coded defaults will be used
# to create the program's environment.
# See also arm and strongarm above.
#       newlib_cflags="${newlib_cflags} -DARM_RDP_MONITOR"
        newlib_cflags="${newlib_cflags} -DARM_RDI_MONITOR"
        ;;
  tic80*)
        syscall_dir=syscalls
        ;;
  v850-*-*)
        syscall_dir=syscalls
        ;;
  v850e-*-*)
        syscall_dir=syscalls
        ;;
  v850ea-*-*)
        syscall_dir=syscalls
        ;;
  w65-*-*)
        syscall_dir=syscalls    
        newlib_cflags="${newlib_cflags} -DSMALL_DTOA -DSMALL_MEMORY"
        ;;      
  z8k-*-*)
        syscall_dir=syscalls
        ;;
  *)
        newlib_cflags="${newlib_cflags} -DMISSING_SYSCALL_NAMES"
        syscall_dir=
        ;;
esac