# 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

newlib_cflags=
machine_dir=
sys_dir=
posix_dir=
signal_dir=signal
syscall_dir=
unix_dir=
mach_add_setjmp=

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 ${host} in
	*-*-go32 | *-*-sco* | *-*-cygwin*) 
		machine_dir=i386
		;;
	*) 
		machine_dir=i386
		mach_add_setjmp=true
		;;
	esac
	;;
  ia64*)
	;;
  m32r*)
	machine_dir=m32r
	;;
  m68*)
	machine_dir=m68k
	;;
  m88k)
	machine_dir=m88k
	newlib_cflags="${newlib_cflags} -m88000"
	;;
  m88110)
	machine_dir=m88k
	newlib_cflags="${newlib_cflags} -m88110"
	;;
  mcore)
	;;
  mips*)
	machine_dir=mips
	;;
  mn10200)
	machine_dir=mn10200
	;;
  mn10300)
	machine_dir=mn10300
	;;
  or16)
	;;
  or32)
	;;
  powerpc*)
	machine_dir=powerpc
	;;
  sh)
	machine_dir=sh
	;;
  sparc*)
	machine_dir=sparc
	# FIXME: Might wish to make MALLOC_ALIGNMENT more generic.
	newlib_cflags="${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

# 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-*-xray*)
	sys_dir=h8300xray
	;;
  h8500-*-hms*)
	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="${newlib_cflags} -D_LOOSE_KERNEL_NAMES"
	# --- Required when building a shared library ------------------------ 
	newlib_cflags="${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
	;;
  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"
	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="${newlib_cflags} -DHAVE_GETTIMEOFDAY -DMALLOC_PROVIDED -DEXIT_PROVIDED -DMISSING_SYSCALL_NAMES -DSIGNAL_PROVIDED -DREENTRANT_SYSCALLS_PROVIDED -DHAVE_OPENDIR -DNO_EXEC -DWANT_PRINTF_LONG_LONG"
	;;
# VxWorks supplies its own version of malloc, and the newlib one
# doesn't work because VxWorks does not have sbrk.
  *-wrs-vxworks*)
	newlib_cflags="${newlib_cflags} -DMALLOC_PROVIDED -DMISSING_SYSCALL_NAMES"
	;;
# 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"
	;;
  i[3456]86-*-netware*)
	newlib_cflags="${newlib_cflags} -DMISSING_SYSCALL_NAMES -DNO_EXEC -DABORT_PROVIDED -DCLOCK_PROVIDED -DMALLOC_PROVIDED"
	;;
  i[3456]86-*-go32)
	newlib_cflags="${newlib_cflags} -DMISSING_SYSCALL_NAMES -DNO_EXEC"
	;;
  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
	;;
  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"
	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="${newlib_cflags} -DREENTRANT_SYSCALLS_PROVIDED -DHAVE_BLKSIZE -DHAVE_GETTIMEOFDAY"
	# This either belongs elsewhere or nowhere. But I need *something*,
	# so for now it's here ...
	case "${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