aclocal.m4

这个是LINUX下的GDB调度工具的源码

  l*|L*) sim_endian="-DWITH_TARGET_BYTE_ORDER=LITTLE_ENDIAN";;
  yes)	 if test x"$wire_endian" != x; then
	   sim_endian="-DWITH_TARGET_BYTE_ORDER=${wire_endian}"
	 else
           if test x"$default_endian" != x; then
	     sim_endian="-DWITH_TARGET_BYTE_ORDER=${default_endian}"
	   else
	     echo "No hard-wired endian for target $target" 1>&6
	     sim_endian="-DWITH_TARGET_BYTE_ORDER=0"
	   fi
	 fi;;
  no)	 if test x"$default_endian" != x; then
	   sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=${default_endian}"
	 else
	   if test x"$wire_endian" != x; then
	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=${wire_endian}"
	   else
	     echo "No default endian for target $target" 1>&6
	     sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=0"
	   fi
	 fi;;
  *)	 AC_MSG_ERROR("Unknown value $enableval for --enable-sim-endian"); sim_endian="";;
esac
if test x"$silent" != x"yes" && test x"$sim_endian" != x""; then
  echo "Setting endian flags = $sim_endian" 6>&1
fi],
[if test x"$default_endian" != x; then
  sim_endian="-DWITH_DEFAULT_TARGET_BYTE_ORDER=${default_endian}"
else
  if test x"$wire_endian" != x; then
    sim_endian="-DWITH_TARGET_BYTE_ORDER=${wire_endian}"
  else
    sim_endian=
  fi
fi])dnl
])
AC_SUBST(sim_endian)


dnl --enable-sim-hostendian is for users of the simulator when
dnl they find that AC_C_BIGENDIAN does not function correctly
dnl (for instance in a canadian cross)
AC_DEFUN(SIM_AC_OPTION_HOSTENDIAN,
[
AC_ARG_ENABLE(sim-hostendian,
[  --enable-sim-hostendian=end		Specify host byte endian orientation.],
[case "${enableval}" in
  no)	 sim_hostendian="-DWITH_HOST_BYTE_ORDER=0";;
  b*|B*) sim_hostendian="-DWITH_HOST_BYTE_ORDER=BIG_ENDIAN";;
  l*|L*) sim_hostendian="-DWITH_HOST_BYTE_ORDER=LITTLE_ENDIAN";;
  *)	 AC_MSG_ERROR("Unknown value $enableval for --enable-sim-hostendian"); sim_hostendian="";;
esac
if test x"$silent" != x"yes" && test x"$sim_hostendian" != x""; then
  echo "Setting hostendian flags = $sim_hostendian" 6>&1
fi],[
if test "x$cross_compiling" = "xno"; then
  AC_C_BIGENDIAN
  if test $ac_cv_c_bigendian = yes; then
    sim_hostendian="-DWITH_HOST_BYTE_ORDER=BIG_ENDIAN"
  else
    sim_hostendian="-DWITH_HOST_BYTE_ORDER=LITTLE_ENDIAN"
  fi
else
  sim_hostendian="-DWITH_HOST_BYTE_ORDER=0"
fi])dnl
])
AC_SUBST(sim_hostendian)


dnl --enable-sim-float is for developers of the simulator
dnl It specifies the presence of hardware floating point
dnl And optionally the bitsize of the floating point register.
dnl arg[1] specifies the presence (or absence) of floating point hardware
dnl arg[2] specifies the number of bits in a floating point register
AC_DEFUN(SIM_AC_OPTION_FLOAT,
[
default_sim_float="[$1]"
default_sim_float_bitsize="[$2]"
AC_ARG_ENABLE(sim-float,
[  --enable-sim-float			Specify that the target processor has floating point hardware.],
[case "${enableval}" in
  yes | hard)	sim_float="-DWITH_FLOATING_POINT=HARD_FLOATING_POINT";;
  no | soft)	sim_float="-DWITH_FLOATING_POINT=SOFT_FLOATING_POINT";;
  32)           sim_float="-DWITH_FLOATING_POINT=HARD_FLOATING_POINT -DWITH_TARGET_FLOATING_POINT_BITSIZE=32";;
  64)           sim_float="-DWITH_FLOATING_POINT=HARD_FLOATING_POINT -DWITH_TARGET_FLOATING_POINT_BITSIZE=64";;
  *)		AC_MSG_ERROR("Unknown value $enableval passed to --enable-sim-float"); sim_float="";;
esac
if test x"$silent" != x"yes" && test x"$sim_float" != x""; then
  echo "Setting float flags = $sim_float" 6>&1
fi],[
sim_float=
if test x"${default_sim_float}" != x""; then
  sim_float="-DWITH_FLOATING_POINT=${default_sim_float}"
fi
if test x"${default_sim_float_bitsize}" != x""; then
  sim_float="$sim_float -DWITH_TARGET_FLOATING_POINT_BITSIZE=${default_sim_float_bitsize}"
fi
])dnl
])
AC_SUBST(sim_float)


dnl The argument is the default cache size if none is specified.
AC_DEFUN(SIM_AC_OPTION_SCACHE,
[
default_sim_scache="ifelse([$1],,0,[$1])"
AC_ARG_ENABLE(sim-scache,
[  --enable-sim-scache=size		Specify simulator execution cache size.],
[case "${enableval}" in
  yes)	sim_scache="-DWITH_SCACHE=${default_sim_scache}";;
  no)	sim_scache="-DWITH_SCACHE=0" ;;
  [[0-9]]*) sim_scache="-DWITH_SCACHE=${enableval}";;
  *)	AC_MSG_ERROR("Bad value $enableval passed to --enable-sim-scache");
	sim_scache="";;
esac
if test x"$silent" != x"yes" && test x"$sim_scache" != x""; then
  echo "Setting scache size = $sim_scache" 6>&1
fi],[sim_scache="-DWITH_SCACHE=${default_sim_scache}"])
])
AC_SUBST(sim_scache)


dnl The argument is the default model if none is specified.
AC_DEFUN(SIM_AC_OPTION_DEFAULT_MODEL,
[
default_sim_default_model="ifelse([$1],,0,[$1])"
AC_ARG_ENABLE(sim-default-model,
[  --enable-sim-default-model=model	Specify default model to simulate.],
[case "${enableval}" in
  yes|no) AC_MSG_ERROR("Missing argument to --enable-sim-default-model");;
  *)	sim_default_model="-DWITH_DEFAULT_MODEL='\"${enableval}\"'";;
esac
if test x"$silent" != x"yes" && test x"$sim_default_model" != x""; then
  echo "Setting default model = $sim_default_model" 6>&1
fi],[sim_default_model="-DWITH_DEFAULT_MODEL='\"${default_sim_default_model}\"'"])
])
AC_SUBST(sim_default_model)


dnl --enable-sim-hardware is for users of the simulator
dnl arg[1] Enable sim-hw by default? ("yes" or "no")
dnl arg[2] is a space separated list of devices that override the defaults
dnl arg[3] is a space separated list of extra target specific devices.
AC_DEFUN(SIM_AC_OPTION_HARDWARE,
[
if test x"[$1]" = x"yes"; then
  sim_hw_p=yes
else
  sim_hw_p=no
fi
if test "[$2]"; then
  hardware="core pal glue"
else
  hardware="core pal glue [$3]"
fi
sim_hw_cflags="-DWITH_HW=1"
sim_hw="$hardware"
sim_hw_objs="\$(SIM_COMMON_HW_OBJS) `echo $sim_hw | sed -e 's/\([[^ ]][[^ ]]*\)/dv-\1.o/g'`"
AC_ARG_ENABLE(sim-hardware,
[  --enable-sim-hardware=LIST		Specify the hardware to be included in the build.],
[
case "${enableval}" in
  yes)	sim_hw_p=yes;;
  no)	sim_hw_p=no;;
  ,*)   sim_hw_p=yes; hardware="${hardware} `echo ${enableval} | sed -e 's/,/ /'`";;
  *,)   sim_hw_p=yes; hardware="`echo ${enableval} | sed -e 's/,/ /'` ${hardware}";;
  *)	sim_hw_p=yes; hardware="`echo ${enableval} | sed -e 's/,/ /'`"'';;
esac
if test "$sim_hw_p" != yes; then
  sim_hw_objs=
  sim_hw_cflags="-DWITH_HW=0"
  sim_hw=
else
  sim_hw_cflags="-DWITH_HW=1"
  # remove duplicates
  sim_hw=""
  sim_hw_objs="\$(SIM_COMMON_HW_OBJS)"
  for i in x $hardware ; do
    case " $f " in
      x) ;;
      *" $i "*) ;;
      *) sim_hw="$sim_hw $i" ; sim_hw_objs="$sim_hw_objs dv-$i.o";;
    esac
  done
fi
if test x"$silent" != x"yes" && test "$sim_hw_p" = "yes"; then
  echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
fi],[
if test "$sim_hw_p" != yes; then
  sim_hw_objs=
  sim_hw_cflags="-DWITH_HW=0"
  sim_hw=
fi
if test x"$silent" != x"yes"; then
  echo "Setting hardware to $sim_hw_cflags, $sim_hw, $sim_hw_objs"
fi])dnl
])
AC_SUBST(sim_hw_cflags)
AC_SUBST(sim_hw_objs)
AC_SUBST(sim_hw)


dnl --enable-sim-inline is for users that wish to ramp up the simulator's
dnl performance by inlining functions.
dnl Guarantee that unconfigured simulators do not do any inlining
sim_inline="-DDEFAULT_INLINE=0"
AC_DEFUN(SIM_AC_OPTION_INLINE,
[
default_sim_inline="ifelse([$1],,,-DDEFAULT_INLINE=[$1])"
AC_ARG_ENABLE(sim-inline,
[  --enable-sim-inline=inlines		Specify which functions should be inlined.],
[sim_inline=""
case "$enableval" in
  no)		sim_inline="-DDEFAULT_INLINE=0";;
  0)		sim_inline="-DDEFAULT_INLINE=0";;
  yes | 2)	sim_inline="-DDEFAULT_INLINE=ALL_C_INLINE";;
  1)		sim_inline="-DDEFAULT_INLINE=INLINE_LOCALS";;
  *) for x in `echo "$enableval" | sed -e "s/,/ /g"`; do
       new_flag=""
       case "$x" in
	 *_INLINE=*)	new_flag="-D$x";;
	 *=*)		new_flag=`echo "$x" | sed -e "s/=/_INLINE=/" -e "s/^/-D/"`;;
	 *_INLINE)	new_flag="-D$x=ALL_C_INLINE";;
	 *)		new_flag="-D$x""_INLINE=ALL_C_INLINE";;
       esac
       if test x"$sim_inline" = x""; then
	 sim_inline="$new_flag"
       else
	 sim_inline="$sim_inline $new_flag"
       fi
     done;;
esac
if test x"$silent" != x"yes" && test x"$sim_inline" != x""; then
  echo "Setting inline flags = $sim_inline" 6>&1
fi],[
if test "x$cross_compiling" = "xno"; then
  if test x"$GCC" != "x" -a x"${default_sim_inline}" != "x" ; then
    sim_inline="${default_sim_inline}"
    if test x"$silent" != x"yes"; then
      echo "Setting inline flags = $sim_inline" 6>&1
    fi
  else
    sim_inline=""
  fi
else
  sim_inline="-DDEFAULT_INLINE=0"
fi])dnl
])
AC_SUBST(sim_inline)


AC_DEFUN(SIM_AC_OPTION_PACKAGES,
[
AC_ARG_ENABLE(sim-packages,
[  --enable-sim-packages=list		Specify the packages to be included in the build.],
[packages=disklabel
case "${enableval}" in
  yes)	;;
  no)	AC_MSG_ERROR("List of packages must be specified for --enable-sim-packages"); packages="";;
  ,*)   packages="${packages}${enableval}";;
  *,)   packages="${enableval}${packages}";;
  *)	packages="${enableval}"'';;
esac
sim_pk_src=`echo $packages | sed -e 's/,/.c pk_/g' -e 's/^/pk_/' -e 's/$/.c/'`
sim_pk_obj=`echo $sim_pk_src | sed -e 's/\.c/.o/g'`
if test x"$silent" != x"yes" && test x"$packages" != x""; then
  echo "Setting packages to $sim_pk_src, $sim_pk_obj"
fi],[packages=disklabel
sim_pk_src=`echo $packages | sed -e 's/,/.c pk_/g' -e 's/^/pk_/' -e 's/$/.c/'`
sim_pk_obj=`echo $sim_pk_src | sed -e 's/\.c/.o/g'`
if test x"$silent" != x"yes"; then
  echo "Setting packages to $sim_pk_src, $sim_pk_obj"
fi])dnl
])
AC_SUBST(sim_packages)


AC_DEFUN(SIM_AC_OPTION_REGPARM,
[
AC_ARG_ENABLE(sim-regparm,
[  --enable-sim-regparm=nr-parm		Pass parameters in registers instead of on the stack - x86/GCC specific.],
[case "${enableval}" in
  0*|1*|2*|3*|4*|5*|6*|7*|8*|9*) sim_regparm="-DWITH_REGPARM=${enableval}";;
  no)                            sim_regparm="" ;;
  yes)                           sim_regparm="-DWITH_REGPARM=3";;
  *)   AC_MSG_ERROR("Unknown value $enableval for --enable-sim-regparm"); sim_regparm="";;
esac
if test x"$silent" != x"yes" && test x"$sim_regparm" != x""; then
  echo "Setting regparm flags = $sim_regparm" 6>&1
fi],[sim_regparm=""])dnl
])
AC_SUBST(sim_regparm)


AC_DEFUN(SIM_AC_OPTION_RESERVED_BITS,
[
default_sim_reserved_bits="ifelse([$1],,1,[$1])"
AC_ARG_ENABLE(sim-reserved-bits,
[  --enable-sim-reserved-bits		Specify whether to check reserved bits in instruction.],
[case "${enableval}" in
  yes)	sim_reserved_bits="-DWITH_RESERVED_BITS=1";;
  no)	sim_reserved_bits="-DWITH_RESERVED_BITS=0";;
  *)	AC_MSG_ERROR("--enable-sim-reserved-bits does not take a value"); sim_reserved_bits="";;
esac
if test x"$silent" != x"yes" && test x"$sim_reserved_bits" != x""; then
  echo "Setting reserved flags = $sim_reserved_bits" 6>&1
fi],[sim_reserved_bits="-DWITH_RESERVED_BITS=${default_sim_reserved_bits}"])dnl
])
AC_SUBST(sim_reserved_bits)


AC_DEFUN(SIM_AC_OPTION_SMP,
[
default_sim_smp="ifelse([$1],,5,[$1])"
AC_ARG_ENABLE(sim-smp,
[  --enable-sim-smp=n			Specify number of processors to configure for (default ${default_sim_smp}).],
[case "${enableval}" in
  yes)	sim_smp="-DWITH_SMP=5" ; sim_igen_smp="-N 5";;
  no)	sim_smp="-DWITH_SMP=0" ; sim_igen_smp="-N 0";;
  *)	sim_smp="-DWITH_SMP=$enableval" ; sim_igen_smp="-N $enableval";;
esac
if test x"$silent" != x"yes" && test x"$sim_smp" != x""; then
  echo "Setting smp flags = $sim_smp" 6>&1
fi],[sim_smp="-DWITH_SMP=${default_sim_smp}" ; sim_igen_smp="-N ${default_sim_smp}"
if test x"$silent" != x"yes"; then
  echo "Setting smp flags = $sim_smp" 6>&1
fi])dnl
])
AC_SUBST(sim_smp)


AC_DEFUN(SIM_AC_OPTION_STDCALL,
[
AC_ARG_ENABLE(sim-stdcall,
[  --enable-sim-stdcall=type		Use an alternative function call/return mechanism - x86/GCC specific.],
[case "${enableval}" in
  no)		sim_stdcall="" ;;
  std*)		sim_stdcall="-DWITH_STDCALL=1";;
  yes)		sim_stdcall="-DWITH_STDCALL=1";;
  *)   AC_MSG_ERROR("Unknown value $enableval for --enable-sim-stdcall"); sim_stdcall="";;
esac
if test x"$silent" != x"yes" && test x"$sim_stdcall" != x""; then
  echo "Setting function call flags = $sim_stdcall" 6>&1
fi],[sim_stdcall=""])dnl
])
AC_SUBST(sim_stdcall)


AC_DEFUN(SIM_AC_OPTION_XOR_ENDIAN,
[
default_sim_xor_endian="ifelse([$1],,8,[$1])"
AC_ARG_ENABLE(sim-xor-endian,
[  --enable-sim-xor-endian=n		Specify number bytes involved in XOR bi-endian mode (default ${default_sim_xor_endian}).],
[case "${enableval}" in
  yes)	sim_xor_endian="-DWITH_XOR_ENDIAN=8";;
  no)	sim_xor_endian="-DWITH_XOR_ENDIAN=0";;
  *)	sim_xor_endian="-DWITH_XOR_ENDIAN=$enableval";;
esac
if test x"$silent" != x"yes" && test x"$sim_xor_endian" != x""; then
  echo "Setting xor-endian flag = $sim_xor_endian" 6>&1
fi],[sim_xor_endian="-DWITH_XOR_ENDIAN=${default_sim_xor_endian}"])dnl
])
AC_SUBST(sim_xor_endian)


dnl --enable-build-warnings is for developers of the simulator.
dnl it enables extra GCC specific warnings.
AC_DEFUN(SIM_AC_OPTION_WARNINGS,
[
# NOTE: Don't add -Wall or -Wunused, they both include
# -Wunused-parameter which reports bogus warnings.
# NOTE: If you add to this list, remember to update
# gdb/doc/gdbint.texinfo.
build_warnings="-Wimplicit -Wreturn-type -Wcomment -Wtrigraphs \
-Wformat -Wparentheses -Wpointer-arith -Wuninitialized"
# Up for debate: -Wswitch -Wcomment -trigraphs -Wtrigraphs
# -Wunused-function -Wunused-label -Wunused-variable -Wunused-value
# -Wchar-subscripts -Wtraditional -Wshadow -Wcast-qual
# -Wcast-align -Wwrite-strings -Wconversion -Wstrict-prototypes
# -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls
# -Woverloaded-virtual -Winline -Werror"
AC_ARG_ENABLE(build-warnings,
[  --enable-build-warnings Enable build-time compiler warnings if gcc is used],
[case "${enableval}" in
  yes)	;;
  no)	build_warnings="-w";;
  ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
        build_warnings="${build_warnings} ${t}";;
  *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
        build_warnings="${t} ${build_warnings}";;
  *)    build_warnings=`echo "${enableval}" | sed -e "s/,/ /g"`;;
esac
if test x"$silent" != x"yes" && test x"$build_warnings" != x""; then
  echo "Setting compiler warning flags = $build_warnings" 6>&1
fi])dnl
AC_ARG_ENABLE(sim-build-warnings,
[  --enable-gdb-build-warnings Enable SIM specific build-time compiler warnings if gcc is used],
[case "${enableval}" in
  yes)	;;
  no)	build_warnings="-w";;
  ,*)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
        build_warnings="${build_warnings} ${t}";;
  *,)   t=`echo "${enableval}" | sed -e "s/,/ /g"`
        build_warnings="${t} ${build_warnings}";;
  *)    build_warnings=`echo "${enableval}" | sed -e "s/,/ /g"`;;
esac
if test x"$silent" != x"yes" && test x"$build_warnings" != x""; then
  echo "Setting GDB specific compiler warning flags = $build_warnings" 6>&1
fi])dnl
WARN_CFLAGS=""
WERROR_CFLAGS=""
if test "x${build_warnings}" != x -a "x$GCC" = xyes
then
    AC_MSG_CHECKING(compiler warning flags)
    # Separate out the -Werror flag as some files just cannot be
    # compiled with it enabled.
    for w in ${build_warnings}; do
	case $w in
	-Werr*) WERROR_CFLAGS=-Werror ;;
	*) # Check that GCC accepts it