configure.in

上一个上传的有问题,这个是好的。visopsys包括系统内核和GUI的全部SOURCE code ,还包括一些基本的docs文档。里面src子目录对应所有SOURCE code.对于想研究操作系统的朋

      # i386-pc-pe-coff != i386-pc-coff.
      i386-*-pe-coff)	;;
      # Uncommenting the next line will turn on support for i386 AOUT
      # for the default linux configuration
      # i386-*-linux*-elf) emulation="i386elf i386aout" ;;
      #
      i386-*-aout)	emulation="i386aout" ;;
      i386-*-coff)	emulation="i386coff" ;;
      i386-*-elf)	emulation="i386elf" ;;

      # Always all formats.  The first stated emulation becomes the default.
      cris-*-*aout*)	emulation="crisaout criself" ;;
      cris-*-*)		emulation="criself crisaout" ;;
    esac

    emulations="$emulations $emulation"

done

# Turn on all targets if possible
if test ${all_targets} = "yes"; then
  case ${target_cpu_type} in
  i386)
    case ${obj_format} in
    aout)
      emulations="$emulations i386coff i386elf"
      ;;
    coff)
      emulations="$emulations i386aout i386elf"
    ;;
    elf)
      emulations="$emulations i386aout i386coff"
      ;;
    esac
  ;;
  esac
fi

# 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} ;;
  pdp11)	atof=vax ;;
  *)		atof=ieee ;;
esac

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

# Unfortunately the cpu in cpu-opc.h file isn't always $(TARGET_CPU).
cgen_cpu_prefix=""
if test $using_cgen = yes ; then
  case ${target_cpu} in
    *) cgen_cpu_prefix=${target_cpu} ;;
  esac
  AC_SUBST(cgen_cpu_prefix)
  AC_DEFINE(USING_CGEN, 1, [Using cgen code?])
fi

dnl
dnl Make sure the desired support files exist.
dnl

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

case ${user_bfd_gas}-${primary_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)
    primary_bfd_gas=no
    ;;
  *-preferred)
    primary_bfd_gas=yes
    ;;
  yes-*)
    primary_bfd_gas=yes
    ;;
  -*)
    # User specified nothing.
    ;;
esac

# Some COFF configurations want these random other flags set.
case ${obj_format} in
  coff)
    case ${target_cpu_type} in
      i386) AC_DEFINE(I386COFF, 1, [Using i386 COFF?]) ;;
      m68k) AC_DEFINE(M68KCOFF, 1, [Using m68k COFF?]) ;;
      m88k) AC_DEFINE(M88KCOFF, 1, [Using m88k COFF?]) ;;
    esac
    ;;
esac

# Getting this done right is going to be a bitch.  Each configuration specified
# with --enable-targets=... should be checked for environment, format, cpu, and
# bfd_gas setting.
#
# For each configuration, the necessary object file support code must be linked
# in.  This might be only one, it might be up to four.  The necessary emulation
# code needs to be provided, too.
#
# And then there's "--enable-targets=all"....
#
# For now, just always do it for MIPS ELF or ECOFF configurations.  Sigh.

formats="${obj_format}"
emfiles=""
EMULATIONS=""
GAS_UNIQ(emulations)
for em in . $emulations ; do
  case $em in
    .)	continue ;;
    mipsbelf | mipslelf | mipself)
	fmt=elf   file=mipself ;;
    mipsbecoff | mipslecoff | mipsecoff)
	fmt=ecoff file=mipsecoff ;;
    *coff)
	fmt=coff  file=$em ;;
    *aout)
	fmt=aout file=$em ;;
    *elf)
	fmt=elf file=$em ;;
  esac
  formats="$formats $fmt"
  emfiles="$emfiles e-$file.o"
  EMULATIONS="$EMULATIONS &$em,"
done
GAS_UNIQ(formats)
GAS_UNIQ(emfiles)
if test `set . $formats ; shift ; echo $#` -gt 1 ; then
  for fmt in $formats ; do
    case $fmt in
      aout)	AC_DEFINE(OBJ_MAYBE_AOUT, 1,    [a.out support?])   ;;
      bout)	AC_DEFINE(OBJ_MAYBE_BOUT, 1,    [b.out support?])   ;;
      coff)	AC_DEFINE(OBJ_MAYBE_COFF, 1,    [COFF support?])    ;;
      ecoff)	AC_DEFINE(OBJ_MAYBE_ECOFF, 1,   [ECOFF support?])   ;;
      elf)	AC_DEFINE(OBJ_MAYBE_ELF, 1,     [ELF support?])     ;;
      generic)	AC_DEFINE(OBJ_MAYBE_GENERIC, 1, [generic support?]) ;;
      hp300)	AC_DEFINE(OBJ_MAYBE_HP300, 1,   [HP300 support?])   ;;
      ieee)	AC_DEFINE(OBJ_MAYBE_IEEE, 1,    [IEEE support?])    ;;
      som)	AC_DEFINE(OBJ_MAYBE_SOM, 1,     [SOM support?])     ;;
      vms)	AC_DEFINE(OBJ_MAYBE_VMS, 1,     [VMS support?])     ;;
    esac
    extra_objects="$extra_objects obj-$fmt.o"
  done
  obj_format=multi
fi
if test `set . $emfiles ; shift ; echo $#` -gt 0 ; then
  DEFAULT_EMULATION=`set . $emulations ; echo $2`
  # e-mips* has more than one emulation per file, e-i386* has just one at the
  # moment.  If only one emulation is specified, then don't define
  # USE_EMULATIONS or include any of the e-files as they will only be bloat.
  case "${obj_format}${emfiles}" in
    multi* | *mips*)
      extra_objects="$extra_objects $emfiles"
      AC_DEFINE(USE_EMULATIONS, 1, [Use emulation support?]) ;;
  esac
fi
AC_SUBST(extra_objects)
AC_DEFINE_UNQUOTED(EMULATIONS, $EMULATIONS, [Supported emulations.])
AC_DEFINE_UNQUOTED(DEFAULT_EMULATION, "$DEFAULT_EMULATION",
		   [Default emulation.])

case ${primary_bfd_gas}-${target_cpu_type}-${obj_format} in
  yes-*-coff)	need_bfd=yes ;;
  no-*-coff)	need_bfd=yes
		AC_DEFINE(MANY_SEGMENTS, 1, [old COFF support?]) ;;
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(target_cpu_type)
AC_SUBST(obj_format)
AC_SUBST(te_file)
AC_SUBST(install_tooldir)
AC_SUBST(atof)
dnl AC_SUBST(emulation)

case "${primary_bfd_gas}" in
  yes)	AC_DEFINE(BFD_ASSEMBLER, 1, [Use BFD interface?])
	need_bfd=yes ;;
esac

# do we need the opcodes library?
case "${need_opcodes}" in
yes)
  OPCODES_LIB=../opcodes/libopcodes.la
  ;;
esac

case "${need_bfd}" in
yes)
  BFDLIB=../bfd/libbfd.la
  ALL_OBJ_DEPS="$ALL_OBJ_DEPS"' ../bfd/bfd.h $(INCDIR)/symcat.h'
  ;;
esac

AC_SUBST(BFDLIB)
AC_SUBST(OPCODES_LIB)

AC_SUBST(ALL_OBJ_DEPS)

AC_DEFINE_UNQUOTED(TARGET_ALIAS,	"${target_alias}", [Target alias.])
AC_DEFINE_UNQUOTED(TARGET_CANONICAL,	"${target}",       [Canonical target.])
AC_DEFINE_UNQUOTED(TARGET_CPU,		"${target_cpu}",   [Target CPU.])
AC_DEFINE_UNQUOTED(TARGET_VENDOR,	"${target_vendor}", [Target vendor.])
AC_DEFINE_UNQUOTED(TARGET_OS,		"${target_os}",    [Target OS.])

AC_PROG_CC

AC_PROG_YACC
AM_PROG_LEX

ALL_LINGUAS="fr tr es"
CY_GNU_GETTEXT

AM_MAINTAINER_MODE
AC_EXEEXT

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, 1, [Compiling cross-assembler?])
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 systems don't have sbrk().
AC_CHECK_FUNCS(sbrk)

# do we need the math library?
case "${need_libm}" in
yes) 
  AC_CHECK_LIBM
  AC_SUBST(LIBM)
  ;;
esac

# 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>
#else
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
"
GAS_CHECK_DECL_NEEDED(strstr, f, char *(*f)(), $gas_test_headers)
GAS_CHECK_DECL_NEEDED(malloc, f, char *(*f)(), $gas_test_headers)
GAS_CHECK_DECL_NEEDED(free, f, void (*f)(), $gas_test_headers)
GAS_CHECK_DECL_NEEDED(sbrk, f, char *(*f)(), $gas_test_headers)
GAS_CHECK_DECL_NEEDED(environ, f, char **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
])

dnl This must come last.

dnl We used to make symlinks to files in the source directory, but now
dnl we just use the right name for .c files, and create .h files in
dnl the build directory which include the right .h file.  Make sure
dnl the old symlinks don't exist, so that a reconfigure in an existing
dnl directory behaves reasonably.

AC_OUTPUT(Makefile doc/Makefile ${GDBINIT}:gdbinit.in po/Makefile.in:po/Make-in,
[rm -f targ-cpu.c targ-cpu.h obj-format.h obj-format.c targ-env.h atof-targ.c itbl-cpu.h
 echo '#include "tc-'"${target_cpu_type}"'.h"' > targ-cpu.h
 echo '#include "obj-'"${obj_format}"'.h"' > obj-format.h
 echo '#include "te-'"${te_file}"'.h"' > targ-env.h
 echo '#include "itbl-'"${target_cpu_type}"'.h"' > itbl-cpu.h
 if test "x$cgen_cpu_prefix" != x ; then
   echo '#include "opcodes/'"${cgen_cpu_prefix}"'-desc.h"' > cgen-desc.h
 fi

 sed -e '/POTFILES =/r po/POTFILES' po/Makefile.in > po/Makefile],
[target_cpu_type=${target_cpu_type}
 cgen_cpu_prefix=${cgen_cpu_prefix}
 obj_format=${obj_format}
 te_file=${te_file}])