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added very preliminary support for Alpha/osf1
Moved flush-tos before stores to improve scheduling
merged io-dos.h and io.h
Created new Makefile for DOS
removed ToDo topcics that are already done

    1: dnl Process this file with autoconf to produce a configure script.
    2: AC_INIT(engine.c)
    3: 
    4: AC_ARG_ENABLE(force-reg,
    5: [  --enable-force-reg	  Use explicit register declarations if they appear in
    6: 			  the machine.h file. This can cause a good speedup,
    7: 			  but also incorrect code with some gcc versions on
    8: 			  some processors (default disabled).],
    9: 
   10: AC_DEFINE(FORCE_REG))
   11: dnl this is not quite according to the autoconf manual, it causes a replacement
   12: AC_ARG_ENABLE(direct-threaded,
   13: [  --enable-direct-threaded	Force direct threading. This may not work on
   14: 				some machines and may cause slowdown on others.
   15: 				(default processor-dependent)],
   16: AC_DEFINE(DIRECT_THREADED))
   17: AC_ARG_ENABLE(indirect-threaded,
   18: [  --enable-indirect-threaded	Force indirect threading. This can cause a
   19: 				slowdown on some machines.
   20: 				(default processor-dependent)],
   21: AC_DEFINE(INDIRECT_THREADED))
   22: 
   23: AC_ARG_WITH(debug,
   24: [  --with-debug     specifys option -g to compile with debug info (default)
   25:    --without-debug  omits the -g switch and creates smaller images on
   26:                     machines where "strip" has problems with gcc style
   27:                     debugging informations.],
   28: if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
   29: 
   30: 
   31: AC_SUBST(GCCLDFLAGS)
   32: AC_SUBST(DEBUGFLAG)
   33: 
   34: wordsize=32
   35: 
   36: #terminology is a bit unusual here: The host is the system on which
   37: #gforth will run; the system on which configure will run is the `build'
   38: AC_CANONICAL_HOST
   39: case "$host_cpu" in
   40: 	hppa*)
   41: 		mach_h=hppa
   42: 		LIBOBJS="cache.o"
   43: 		LDFLAGS="-Xlinker -N"
   44: 		LIBS="-L/lib/pa1.1/"
   45: 		;;
   46: 	sparc*)
   47: 		mach_h=sparc
   48: 		;;
   49: 	i386|i486|i586)
   50: 		mach_h=386
   51: 		CFLAGS="-fforce-mem -fforce-addr -fomit-frame-pointer"
   52: 		#!! direct/indirect threading switch
   53: 		#!! -m486 flag
   54: 		;;
   55: 	m68*)
   56: 		mach_h=m68k
   57: 		;;
   58: 	mips*)
   59: 		mach_h=mips
   60: 		#link text and data segment into the same 256M region!
   61: 		GCCLDFLAGS="-Xlinker -T -Xlinker 10000000 -Xlinker -D -Xlinker 10400000"
   62: 		#this works on Ultrix, but not on Irix
   63: 		#for now use indirect threading under Irix
   64: 		;;
   65: 	alpha*)
   66: 		mach_h=alpha
   67: 		wordsize=64
   68: 		echo Very Preliminary Support for Alpha!!!
   69: 		;;
   70: 	*)
   71: 		echo "No direct threading support for $host_cpu, using indirect threading."
   72: 		echo "Using a generic 32-bit machine description. It will only work if char * AND"
   73: 		echo "long values have 32 bits."
   74: 		echo "I'll assume that C floats and doubles are represented by IEEE single and"
   75: 		echo "double numbers. If this is not so, SF@ etc. will not work correctly."
   76: 		mach_h=32bit
   77: esac
   78: 
   79: dnl Now a little support for DOS/DJGCC
   80: AC_SUBST(MAKE_EXE)
   81: MAKE_EXE=""
   82: 
   83: dnl copy commands for systems that don't have links
   84: AC_SUBST(LINK_KERNL16L)
   85: LINK_KERNL16L=""
   86: AC_SUBST(LINK_KERNL16B)
   87: LINK_KERNL16B=""
   88: AC_SUBST(LINK_KERNL32L)
   89: LINK_KERNL32L=""
   90: AC_SUBST(LINK_KERNL32B)
   91: LINK_KERNL32B=""
   92: AC_SUBST(LINK_KERNL64L)
   93: LINK_KERNL64L=""
   94: AC_SUBST(LINK_KERNL64B)
   95: LINK_KERNL64B=""
   96: 
   97: #if test $host_os=dos
   98: #then
   99: #  echo Configuring for DOS!!!
  100: #  MAKE_EXE="coff2exe gforth"
  101: #  LINK_KERNL32L='$(CP) kernl32l.fi gforth.fi'
  102: #fi
  103: 
  104: dnl the following macro produces a warning with autoconf-2.1
  105: AC_C_BIGENDIAN
  106: AC_SUBST(KERNAL)
  107: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
  108: if test $ac_cv_c_bigendian = yes; then
  109:   bytesex=b
  110:   KERNAL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
  111: else
  112:   bytesex=l
  113:   KERNAL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
  114: fi
  115: 
  116: dnl Checks for programs.
  117: AC_PROG_LN_S
  118: AC_PROG_INSTALL
  119: 
  120: dnl Checks for library functions
  121: dnl This check is just for making later checks link with libm.
  122: dnl using sin here is no good idea since it is built-into gcc and typechecked
  123: AC_CHECK_LIB(m,asin)
  124: AC_FUNC_MEMCMP
  125: AC_REPLACE_FUNCS(memmove strtoul)
  126: AC_CHECK_FUNC(getopt_long,getopt_long="",getopt_long="getopt.o getopt1.o")
  127: AC_SUBST(getopt_long)
  128: AC_CHECK_FUNCS(rint expm1 log1p pow10)
  129: AC_REPLACE_FUNCS(ecvt)
  130: dnl No check for select, because our replacement is no good under
  131: dnl anything but DOS
  132: 
  133: gforth_fi=kernl${wordsize}${bytesex}.fi
  134: AC_SUBST(gforth_fi)
  135: 
  136: AC_LINK_FILES(${mach_h}.h $gforth_fi,machine.h gforth.fi)
  137: AC_OUTPUT(Makefile)
  138: