Make clean targets work also when SUBDIRS is empty.

[deliverable/binutils-gdb.git] / gas / configure.in

dnl Process this file with autoconf to produce a configure script.
dnl
dnl And be careful when changing it!  If you must add tests with square
dnl brackets, be sure changequote invocations surround it.
dnl
dnl
AC_PREREQ(2.3)dnl We only need 2.0, but pre-2.3 loses on some AIX version.
AC_INIT(as.h)dnl
dnl
bfd_gas=no
user_bfd_gas=
AC_ARG_ENABLE(bfd-assembler,
[    bfd-assembler	use BFD back end for writing object files],
[case "${enableval}" in
  yes) need_bfd=yes user_bfd_gas=yes ;;
  no)  user_bfd_gas=no ;;
  *)   AC_MSG_ERROR(bad value ${enableval} given for bfd-assembler option) ;;
esac])dnl

# Generate a header file -- gets more post-processing by Makefile later.
AC_CONFIG_HEADER(conf)

dnl For recursion to work right, this must be an absolute pathname.
AC_CONFIG_AUX_DIR(`cd $srcdir;pwd`/..)
AC_CANONICAL_SYSTEM
AC_ARG_PROGRAM

emulation=generic

# assign cpu type

# check for architecture variants
case ${target_cpu} in
  hppa*)	cpu_type=hppa ;;
changequote(,)dnl
  i[45]86)	cpu_type=i386 ;;
  m680[012346]0) cpu_type=m68k ;;
  m68008)	cpu_type=m68k ;;
  m683??)       cpu_type=m68k ;;
changequote([,])dnl
  m8*)		cpu_type=m88k ;;
  mips*el)	cpu_type=mips endian=little;;
  mips*)	cpu_type=mips endian=big ;;
  powerpcle*)	cpu_type=ppc endian=little;;
  powerpc*)	cpu_type=ppc endian=big;;
  rs6000*)	cpu_type=ppc ;;
  sparc64)	cpu_type=sparc obj_format=elf
		AC_DEFINE(sparcv9) ;;
  sparclite*)   cpu_type=sparc ;;
  *)		cpu_type=${target_cpu} ;;
esac

# do we need the opcodes library?
case ${cpu_type} in
  alpha | vax)
    ;;
  *)
    OPCODES_LIB="../opcodes/libopcodes.a"
    ;;
esac
AC_SUBST(OPCODES_LIB)

gas_target=${cpu_type}
generic_target=${cpu_type}-${target_vendor}-${target_os}
dev=no

# assign object format
case ${generic_target} in
  a29k-amd-udi)		obj_format=coff gas_target=ebmon29k ;;
  a29k-amd-ebmon)	obj_format=coff gas_target=ebmon29k ;;
  a29k-*-vxworks*)      obj_format=coff ;;

  alpha-*-netware*)	obj_format=ecoff ;;
  alpha-*-osf*)		obj_format=ecoff ;;

# start-sanitize-arc
  arc-*-elf*)		obj_format=elf bfd_gas=yes ;;
# end-sanitize-arc

  arm-*-riscix*)	obj_format=aout ;;

  hppa-*-*elf*)		obj_format=elf emulation=hppa ;;
  hppa-*-lites*)	obj_format=elf emulation=hppa ;;
  hppa-*-osf*)		obj_format=som emulation=hppa ;;
  hppa-*-hpux*)		obj_format=som emulation=hppa ;;
  hppa-*-bsd*)		obj_format=som emulation=hppa ;;
  hppa-*-hiux*)		obj_format=som emulation=hppa ;;

  h8300-*-coff)		obj_format=coff ;;

  i386-ibm-aix*)	obj_format=coff gas_target=i386coff
			 emulation=i386aix ;;
  i386-*-bsd*)		obj_format=aout emulation=386bsd ;;
  i386-*-netbsd0.8)	obj_format=aout emulation=386bsd ;;
  i386-*-netbsd*)	obj_format=aout emulation=nbsd bfd_gas=yes;;
  i386-*-linux*aout*)	obj_format=aout  emulation=linux ;;
  i386-*-linux*coff*)	obj_format=coff emulation=linux
			 gas_target=i386coff ;;
  i386-*-linux*)	obj_format=elf emulation=linux ;;
  i386-*-lynxos*)	obj_format=coff gas_target=i386coff
			 emulation=lynx ;;
  i386-*-sysv4* | i386-*-solaris* | i386-*-elf)
			obj_format=elf ;;
  i386-*-coff | i386-*-sysv* | i386-*-sco* | i386-*-isc*)
			obj_format=coff gas_target=i386coff ;;
  i386-*-vsta)		obj_format=aout ;;
  i386-*-go32)		obj_format=coff gas_target=i386coff ;;
  i386-*-gnu*elf*)	obj_format=elf ;;
  i386-*-mach* | i386-*-gnu*)
			obj_format=aout emulation=mach bfd_gas=yes ;;
  i386-*-msdos*)	obj_format=aout ;;

  i960-*-bout)		obj_format=bout ;;
  i960-*-coff)		obj_format=coff emulation=ic960 gas_target=ic960coff ;;
  i960-*-nindy*)	obj_format=bout ;;
  i960-*-vxworks4*)	obj_format=bout ;;
  i960-*-vxworks5.0)	obj_format=bout ;;
  i960-*-vxworks5.*)	obj_format=coff emulation=ic960 gas_target=ic960coff ;;
  i960-*-vxworks*)	obj_format=bout ;;

  m68k-*-vxworks* | m68k-ericsson-ose | m68k-*-sunos*)
			obj_format=aout emulation=sun3 ;;
  m68k-motorola-sysv)	obj_format=coff gas_target=m68kcoff emulation=delta ;;
  m68k-bull-sysv3*)	obj_format=coff gas_target=m68kcoff emulation=dpx2 ;;
  m68k-apollo-*)	obj_format=coff gas_target=apollo emulation=apollo ;;
  m68k-*-coff | m68k-*-sysv*)
			obj_format=coff gas_target=m68kcoff ;;
  m68k-*-elf)		obj_format=elf ;;
  m68k-*-hpux*)		obj_format=hp300 emulation=hp300 ;;
  m68k-*-lynxos*)	obj_format=coff gas_target=m68kcoff
			 emulation=lynx ;;
  m68k-*-netbsd*)	obj_format=aout emulation=nbsd bfd_gas=yes ;;

  m88k-*-coff*)		obj_format=coff gas_target=m88kcoff ;;

  # don't change emulation like *-*-bsd does
  mips-dec-bsd*)	obj_format=aout gas_target=mips-lit ;;
  mips-sony-bsd*)	obj_format=ecoff gas_target=mips-big ;;
  mips-*-bsd*)		AC_MSG_ERROR(Unknown vendor for mips-bsd configuration.) ;;
  mips-*-ultrix*)	obj_format=ecoff gas_target=mips-lit ;;
  mips-*-ecoff*)	obj_format=ecoff 
			case "$endian" in
			big) gas_target=mips-big ;;
			*)   gas_target=mips-lit ;;
			esac
			;;
  mips-*-ecoff*)	obj_format=ecoff gas_target=mips-big ;;
  mips-*-gnu*)		obj_format=aout
			case "$endian" in
			big) gas_target=mips-big ;;
			*)   gas_target=mips-lit ;;
			esac
			;;
  mips-*-irix5*)	obj_format=elf gas_target=mips-big ;;
  mips-*-irix*)		obj_format=ecoff gas_target=mips-big ;;
  mips-*-riscos*)	obj_format=ecoff gas_target=mips-big ;;
  mips-*-sysv*)		obj_format=ecoff gas_target=mips-big ;;
  mips-*-elf*)		obj_format=elf 
			case "$endian" in
			big) gas_target=mips-big ;;
			*)   gas_target=mips-lit ;;
			esac
			;;
  ppc-*-aix*)		obj_format=coff ;;
  ppc-*-elf* | ppc-*-eabi* | ppc-*-sysv4*)
			obj_format=elf
			case "$endian" in
			big) gas_target=ppc-big ;;
			*)   gas_target=ppc-lit ;;
			esac
			;;
  ppc-*-netware*)	obj_format=elf emulation=ppcnw ;;

  sh-*-coff)		obj_format=coff ;;

# start-sanitize-rce
  rce-*-aout)		obj_format=aout ;;
# end-sanitize-rce

  ns32k-pc532-mach*)	obj_format=aout emulation=pc532mach ;;
  ns32k-pc532-netbsd*)	obj_format=aout emulation=nbsd532 ;;

  sparc-*-sunos4*)	obj_format=aout emulation=sun3 ;;
  sparc-*-aout | sparc*-*-vxworks)
			obj_format=aout ;;
  sparc-*-coff)		obj_format=coff ;;
  sparc-*-lynxos*)	obj_format=coff emulation=lynx ;;
  sparc-fujitsu-none)	obj_format=aout ;;
  sparc-*-elf | sparc*-*-solaris*)
			obj_format=elf ;;
  sparc-*-netbsd*)	obj_format=aout emulation=nbsd bfd_gas=yes ;;

  vax-*-bsd* | vax-*-ultrix*)
			obj_format=aout ;;
  vax-*-vms)		obj_format=vms ;;

  z8k-*-coff | z8k-*-sim)
			obj_format=coff ;;

  w65-*-*)		obj_format=coff ;;

  *-*-aout | *-*-scout)
			obj_format=aout ;;
  *-*-nindy*)
			obj_format=bout ;;
  *-*-bsd*)
			obj_format=aout emulation=sun3 ;;
  *-*-generic)		obj_format=generic ;;
  *-*-xray | *-*-hms)	obj_format=coff ;;
  *-*-sim)		obj_format=coff ;;
  *-*-elf | *-*-sysv4* | *-*-solaris*)
			AC_MSG_WARN(GAS support for ELF format is incomplete)
			obj_format=elf dev=yes ;;
  *-*-vxworks)		obj_format=aout ;;
  *-*-netware)		obj_format=elf ;;
esac

# Assign floating point type.  Most processors with FP support
# IEEE FP.  On those that don't support FP at all, usually IEEE
# is emulated.
case ${target_cpu} in
  vax | tahoe )	atof=${target_cpu} ;;
  *)			atof=ieee ;;
esac

case "${obj_format}" in
  "") AC_MSG_ERROR(GAS does not know what format to use for target ${target}) ;;
esac

dnl
dnl Make sure the desired support files exist.
dnl

if test ! -r ${srcdir}/config/tc-${cpu_type}.c; then
  AC_MSG_ERROR(GAS does not support target CPU ${cpu_type})
fi

if test ! -r ${srcdir}/config/obj-${obj_format}.c; then
  AC_MSG_ERROR(GAS does not have support for object file format ${obj_format})
fi

# and target makefile frag

target_frag=${srcdir}/config/${gas_target}.mt
if test ! -r ${target_frag}; then
  target_frag=/dev/null # ick! but subst_file can't be conditionalized
fi
AC_SUBST_FILE(target_frag)

case ${cpu_type}-${obj_format} in
  arm-*)	bfd_gas=yes ;;
# not yet
# i386-aout)	bfd_gas=preferred ;;
  mips-*)	bfd_gas=yes ;;
  ns32k-*)	bfd_gas=yes ;;
  ppc-*)	bfd_gas=yes ;;
  sparc-*)	bfd_gas=yes ;;
  *-elf)	bfd_gas=yes ;;
  *-ecoff)	bfd_gas=yes ;;
  *-som)	bfd_gas=yes ;;
  *)		;;
esac

case ${user_bfd_gas}-${bfd_gas} in
  yes-yes | no-no)
    # We didn't override user's choice.
    ;;
  no-yes)
    AC_MSG_WARN(Use of BFD is required for ${target}; overriding config options.)
    ;;
  no-preferred)
    bfd_gas=no
    ;;
  *-preferred)
    bfd_gas=yes
    ;;
  yes-*)
    bfd_gas=yes
    ;;
  -*)
    # User specified nothing.
    ;;
esac

case ${bfd_gas}-${cpu_type}-${obj_format} in
  yes-*-coff)	need_bfd=yes ;;
  no-*-coff)	need_bfd=yes
		AC_DEFINE(MANY_SEGMENTS) ;;
esac

reject_dev_configs=yes

case ${reject_dev_configs}-${dev} in
  yes-yes) # Oops.
    AC_MSG_ERROR(GAS does not support the ${generic_target} configuration.)
    ;;
esac

AC_SUBST(cpu_type)
AC_SUBST(obj_format)
AC_SUBST(atof)
AC_SUBST(emulation)

AC_LINK_FILES(config/tc-${cpu_type}.c	config/tc-${cpu_type}.h \
	config/obj-${obj_format}.h config/obj-${obj_format}.c \
	config/te-${emulation}.h config/atof-${atof}.c,
	targ-cpu.c targ-cpu.h obj-format.h obj-format.c targ-env.h atof-targ.c)

case "${bfd_gas}" in
  yes)	AC_DEFINE(BFD_ASSEMBLER)
	need_bfd=yes ;;
esac

case "${need_bfd}" in
  yes)	BFDLIB=../bfd/libbfd.a
	ALL_OBJ_DEPS="$ALL_OBJ_DEPS ../bfd/bfd.h"
	;;
esac
AC_SUBST(BFDLIB)
AC_SUBST(ALL_OBJ_DEPS)

AC_DEFINE_UNQUOTED(TARGET_ALIAS,	"${target_alias}")
AC_DEFINE_UNQUOTED(TARGET_CANONICAL,	"${target}")
AC_DEFINE_UNQUOTED(TARGET_CPU,		"${target_cpu}")
AC_DEFINE_UNQUOTED(TARGET_VENDOR,	"${target_vendor}")
AC_DEFINE_UNQUOTED(TARGET_OS,		"${target_os}")

AC_PROG_CC
AC_PROG_INSTALL

AC_CHECK_HEADERS(string.h stdlib.h memory.h strings.h unistd.h stdarg.h varargs.h errno.h sys/types.h)

# Put this here so that autoconf's "cross-compiling" message doesn't confuse
# people who are not cross-compiling but are compiling cross-assemblers.
AC_MSG_CHECKING(whether compiling a cross-assembler)
if test "${host}" = "${target}"; then
  cross_gas=no
else
  cross_gas=yes
  AC_DEFINE(CROSS_COMPILE)
fi
AC_MSG_RESULT($cross_gas)

dnl ansidecl.h will deal with const
dnl AC_CONST
AC_FUNC_ALLOCA
AC_C_INLINE

# VMS doesn't have unlink.
AC_CHECK_FUNCS(unlink remove, break)

# Some non-ANSI preprocessors botch requoting inside strings.  That's bad
# enough, but on some of those systems, the assert macro relies on requoting
# working properly!
GAS_WORKING_ASSERT

# On some systems, the system header files may not declare malloc, realloc,
# and free.  There are places where gas needs these functions to have been
# declared -- such as when taking their addresses.
gas_test_headers="
#ifdef HAVE_MEMORY_H
#include <memory.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
"
GAS_CHECK_DECL_NEEDED(malloc, f, char *(*f)(), $gas_test_headers)
GAS_CHECK_DECL_NEEDED(free, f, int f, $gas_test_headers)

# Does errno.h declare errno, or do we have to add a separate declaration
# for it?
GAS_CHECK_DECL_NEEDED(errno, f, int f, [
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
])

AC_CONFIG_SUBDIRS(testsuite)

dnl This must come last.
AC_OUTPUT(Makefile doc/Makefile .gdbinit:gdbinit.in)