File:  [gforth] / gforth / configure.in
Revision 1.203: download - view: text, annotated - select for diffs
Wed Jan 2 21:04:44 2008 UTC (11 years, 9 months ago) by anton
Branches: MAIN
CVS tags: HEAD
Added configure variable STACK_CACHE_REGS and set useful defaults
  currently supported: 0-4 regs, default reg 0-4.

    1: dnl Process this file with autoconf to produce a configure script.
    2: 
    3: #Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2006,2007 Free Software Foundation, Inc.
    4: 
    5: #This file is part of Gforth.
    6: 
    7: #Gforth is free software; you can redistribute it and/or
    8: #modify it under the terms of the GNU General Public License
    9: #as published by the Free Software Foundation, either version 3
   10: #of the License, or (at your option) any later version.
   11: 
   12: #This program is distributed in the hope that it will be useful,
   13: #but WITHOUT ANY WARRANTY; without even the implied warranty of
   14: #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.#See the
   15: #GNU General Public License for more details.
   16: 
   17: #You should have received a copy of the GNU General Public License
   18: #along with this program. If not, see http://www.gnu.org/licenses/.
   19: 
   20: 
   21: dnl We use some automake macros here,
   22: dnl but don't use automake for creating Makefile.in
   23: AC_INIT([gforth],[0.6.9-20070604],[https://savannah.gnu.org/bugs/?func=addbug&group=gforth])
   24: AC_PREREQ(2.54)
   25: #snapshots have numbers major.minor.release-YYYYMMDD
   26: #note that lexicographic ordering must be heeded.
   27: #I.e., 0.4.1-YYYYMMDD must not exist before 0.4.1!
   28: UPDATED="June 02, 2007"
   29: AC_SUBST(UPDATED)
   30: AC_CONFIG_HEADERS(engine/config.h)
   31: 
   32: #suppress the "-g -O2" default
   33: test "$CFLAGS" || CFLAGS=-O2
   34: 
   35: AC_ARG_ENABLE(force-reg,
   36: 	AC_HELP_STRING([--enable-force-reg],
   37: 		        [ Use explicit register declarations if they appear in
   38: 			  the machine.h file. This can cause a good speedup,
   39: 			  but also incorrect code with some gcc versions on
   40: 			  some processors (default disabled).]),
   41: 	,enable_force_reg=no)
   42: test "$enable_force_reg" = "no"||
   43:   AC_DEFINE(FORCE_REG,,[Define if you want to use explicit register declarations for better performance or for more convenient CODE words (does not work with all GCC versions on all machines)])
   44: 
   45: AC_ARG_ENABLE(force-ll,
   46: 	AC_HELP_STRING([--enable-force-ll],
   47: 		       [  Use explicit long long declarations if they appear in
   48: 			  the machine.h file. This can cause a good speedup,
   49: 			  but also incorrect code with some gcc versions on
   50: 			  some processors (default disabled).]),
   51: 	,enable_force_ll=no)
   52: test "$enable_force_ll" = "no"||
   53:   AC_DEFINE(FORCE_LL,,[Define if you want to use explicit long long declarations for better performance (does not work with all GCC versions on all machines)])
   54: 
   55: AC_ARG_ENABLE(force-cdiv,
   56: 	AC_HELP_STRING([--enable-force-cdiv],
   57: 		       [  Use the native C division - symmetric - instead of
   58: 		          floored division (default disabled).]),
   59: 	,enable_force_cdiv=no)
   60: test "$enable_force_cdiv" = "no"||
   61:   AC_DEFINE(FORCE_CDIV,,[Define if you want to use explicit symmetric division for better performance])
   62: 
   63: AC_SUBST(PROFEXES)
   64: AC_SUBST(PROFOBJS)
   65: AC_ARG_ENABLE(prof,
   66: 	AC_HELP_STRING([--enable-prof],
   67: 			[ Build gforth-prof, which outputs frequently occuring
   68:                           sequences of primitives.]),
   69: 	,enable_prof=no)
   70: if test "$enable_prof" = "no"; then
   71:   PROFEXES="gforth-prof\$(EXE)"; PROFOBJS="engine-prof.o main-prof.o profile.o"
   72: fi
   73: 
   74: AC_ARG_WITH(debug,
   75: [  --with-debug		  specifies option -g to compile with debug info
   76:   --without-debug	  omits the -g switch and creates smaller images on
   77: 			  machines where "strip" has problems with gcc style
   78: 			  debugging informations.],
   79: if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
   80: 
   81: dnl PEEPHOLE="yes"
   82: dnl AC_ARG_WITH(peephole,
   83: dnl [  --with-peephole	Enable peephole optimization (default)
   84: dnl   --without-peephole	disables peephole optimization. Creates smaller,
   85: dnl 			but slower images.],
   86: dnl PEEPHOLE="$withval")
   87: 
   88: GCC_LD="\$(GCC)"
   89: EC_MODE="false"
   90: EC=""
   91: engine2="engine2.o"
   92: engine_fast2="engine-fast2.o"
   93: no_dynamic=""
   94: image_i=""
   95: signals_o="io.o signals.o"
   96: 
   97: AC_ARG_WITH(ec,
   98: 	AC_HELP_STRING([--with-ec=<arch>],
   99: 			[  Build gforth for systems without OS.]),
  100: [if test "$withval" = "no"; then
  101:   echo "defining hosted system"
  102: else
  103:   echo "defining standalone system (${withval})"
  104:   AC_DEFINE(STANDALONE,,[Define if you want a Gforth without OS])
  105:   EC_MODE="true"
  106:   EC="-ec"
  107:   engine2=""
  108:   engine_fast2=""
  109:   no_dynamic="-DNO_DYNAMIC"
  110:   image_i="image.i"
  111:   if test "$withval" != "yes"; then
  112:     signals_o="io-${withval}.o"
  113:   else
  114:     signals_o="io.o"
  115:   fi
  116:   GCC_PATH=$(which $CC)
  117:   LIB_PATH=${GCC_PATH%/*/*}
  118:   GCC_LD="\$(LD)"
  119:   platform=${withval}
  120: fi])
  121: 
  122: #variables mentioned in INSTALL
  123: AC_ARG_VAR(CC, [The C compiler (must support GNU C 2.x).])
  124: AC_ARG_VAR(FORTHSIZES, [Gforth command line options for the default stack and dictionary sizes (see INSTALL).])
  125: AC_ARG_VAR(STACK_CACHE_REGS, [number of registers in the maximum stack cache state for gforth-fast and gforth-native (default platform-dependent).])
  126: AC_ARG_VAR(STACK_CACHE_DEFAULT_FAST, [number of registers in the default stack cache state for gforth-fast and gforth-native (default 1).])
  127: AC_ARG_VAR(GCC_PR15242_WORKAROUND, [Force the enabling (1) or disabling (0) of a workaround for a gcc-3.x performance bug (default unset: use workaround for gcc-3.x)])
  128: 
  129: AC_ARG_VAR(ac_cv_sizeof_char_p, [sizeof(char *)])
  130: AC_ARG_VAR(ac_cv_sizeof_void_p, [sizeof(void *)])
  131: AC_ARG_VAR(ac_cv_sizeof_char, [sizeof(char)])
  132: AC_ARG_VAR(ac_cv_sizeof_short, [sizeof(short)])
  133: AC_ARG_VAR(ac_cv_sizeof_int, [sizeof(int)])
  134: AC_ARG_VAR(ac_cv_sizeof_long, [sizeof(long)])
  135: AC_ARG_VAR(ac_cv_sizeof_long_long, [sizeof(long long)])
  136: AC_ARG_VAR(ac_cv_sizeof_intptr_t, [sizeof(intptr_t)])
  137: AC_ARG_VAR(ac_cv_sizeof_int128_t, [sizeof(int128_t)])
  138: AC_ARG_VAR(ac_cv_sizeof_uint128_t, [sizeof(uint128_t)])
  139: AC_ARG_VAR(ac_cv_c_bigendian, [Is the target big-endian ("yes" or "no")?])
  140: AC_ARG_VAR(no_dynamic_default, [run gforth with --dynamic (0) or --no-dynamic (1) by default])
  141: AC_ARG_VAR(condbranch_opt, [enable (1) or disable (0) using two dispatches for conditional branches])
  142: AC_ARG_VAR(skipcode, [assembly code for skipping 16 bytes of code])
  143: AC_ARG_VAR(asmcomment, [assembler comment start string])
  144: AC_ARG_VAR(arm_cacheflush, [file containing ARM cacheflush function (without .c)])
  145: 
  146: #set up feature test macros, so the tests get them right:
  147: # turn on all POSIX, SUSv3, and GNU features if available
  148: AC_GNU_SOURCE
  149: dnl AC_DEFINE_UNQUOTED([_GNU_SOURCE],1,[feature test macro])
  150: 
  151: dnl Don't define _POSIX_SOURCE etc. because some OSs (in particular
  152: dnl MacOSX) disable some features then (MacOSX checks for _POSIX_SOURCE,
  153: dnl but not for _XOPEN_SOURCE)
  154: dnl AC_DEFINE_UNQUOTED([_POSIX_SOURCE],1,[feature test macro])
  155: dnl AC_DEFINE_UNQUOTED([_POSIX_C_SOURCE],199506L,[feature test macro])
  156: dnl AC_DEFINE_UNQUOTED([_XOPEN_SOURCE],600,[feature test macro])
  157: # turn on large file support with 64-bit off_t where available
  158: AC_SYS_LARGEFILE
  159: dnl AC_DEFINE_UNQUOTED([_LARGEFILE_SOURCE],1,[feature test macro])
  160: dnl AC_DEFINE_UNQUOTED([_FILE_OFFSET_BITS],64,[feature test macro])
  161: 
  162: #currently we force direct threading this way.  Eventually we should
  163: #setup in the arch and engine files right
  164: 
  165: AC_PROG_CC
  166: 
  167: test "$GCC" = "yes" || AC_MSG_ERROR(Gforth uses GNU C extensions and requires GCC 2.0 or higher)
  168: 
  169: AC_MSG_CHECKING([whether to use two dispatches per conditional branch])
  170: test x$condbranch_opt = x && 
  171: if ($CC -v 2>&1 |grep -q 'gcc version 3'); then
  172:    condbranch_opt=0
  173: else
  174:    condbranch_opt=1
  175: fi
  176: AC_MSG_RESULT($condbranch_opt)
  177: AC_SUBST(condbranch_opt)
  178: 
  179: AC_SUBST(CC)
  180: AC_SUBST(GCC_LD)
  181: AC_SUBST(DEBUGFLAG)
  182: AC_SUBST(EC)
  183: AC_SUBST(EC_MODE)
  184: AC_SUBST(engine2)
  185: AC_SUBST(engine_fast2)
  186: AC_SUBST(no_dynamic)
  187: AC_SUBST(image_i)
  188: AC_SUBST(signals_o)
  189: 
  190: #this is used to disable some (not generally essential) part of the
  191: #Makefile that some makes don't grok.  It would be better to test for
  192: #this specific Makefile feature than the make version.
  193: AC_MSG_CHECKING(make type)
  194: make_type=`make -n -v 2>&1|grep 'ake'|sed 's/ake .*/ake/'`
  195: GNUMAKE='#'
  196: test "$make_type" = "GNU Make" && GNUMAKE=''
  197: AC_MSG_RESULT($make_type)
  198: AC_SUBST(GNUMAKE)
  199: 
  200: AC_MSG_CHECKING([whether the linker accepts -export-dynamic])
  201: OLDLDFLAGS=$LDFLAGS
  202: LDFLAGS="$LDFLAGS -export-dynamic"
  203: dnl AC_TRY_LINK gives false positive on rs6000-ibm-aix4.2.1.0
  204: dnl AC_TRY_LINK(,,ac_export_dynamic=yes,ac_export_dynamic=no)
  205: AC_TRY_RUN(main(){exit(0);},ac_export_dynamic=yes,ac_export_dynamic=no,ac_export_dynamic=no)
  206: test $ac_export_dynamic = yes|| LDFLAGS=$OLDLDFLAGS
  207: AC_MSG_RESULT($ac_export_dynamic)
  208: 
  209: #terminology is a bit unusual here: The host is the system on which
  210: #gforth will run; the system on which configure will run is the `build'
  211: AC_CANONICAL_HOST
  212: case "$host_cpu" in
  213: 	arm*)
  214: 		machine=arm
  215: 		CFLAGS="$CFLAGS -fomit-frame-pointer"
  216: 		if test x$platform = xnxt; then
  217: 		   CFLAGS="$CFLAGS -mthumb -mthumb-interwork"
  218: 		fi
  219: 		if test -z $arm_cacheflush; then
  220: 		    no_dynamic_default=1
  221:                     arm_cacheflush=arch/arm/cacheflush0
  222: 		    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
  223: 		fi
  224:                 AC_LIBSOURCES([../arch/arm/cacheflush0, ../arch/arm/cacheflush1, ../arch/arm/cacheflush2])
  225:                 AC_LIBOBJ(../$arm_cacheflush)
  226:                 #longer skipcodes lead to problems on ARM, and it uses
  227:                 #only 4-byte alignment anyway
  228: 		test "$skipcode" || skipcode="nop"
  229: 		;;
  230: 	hppa*)
  231: 		machine=hppa
  232: 		$srcdir/mkinstalldirs arch/hppa
  233: 		AC_LIBOBJ(../arch/hppa/cache)
  234: 		#-N needed for --dynamic <M4U3b.3790$9d.317@news.cpqcorp.net>
  235: 		LDFLAGS="$LDFLAGS -Xlinker -N"
  236: 		LIBS="$LIBS -L/lib/pa1.1/"
  237: 		;;
  238: 	sparc*)
  239: 		machine=sparc
  240: 		;;
  241: 	i386)
  242: 		machine=386
  243: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr"
  244: 		;;
  245: 	i486)
  246: 		machine=386
  247: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -m486"
  248: 		;;
  249: 	i*86)
  250: 		machine=386
  251: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr"
  252: 		CFLAGS_1="$CFLAGS"
  253: 		CFLAGS="$CFLAGS -march=pentium"
  254: 		AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1 -m486")
  255: 		;;
  256: 	x86_64)
  257: 		case $CC
  258: 		in
  259: 		    *-m32*)
  260: 		    	machine=386
  261: 			CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr"
  262: 			CFLAGS_1="$CFLAGS"
  263: 			CFLAGS="$CFLAGS -march=athlon64"
  264: 			;;
  265: 		    *)
  266: 		    	machine=amd64
  267: 			;;
  268: 		esac
  269: 		;;
  270: 	ia64*)
  271: 		machine=ia64
  272: 		AC_LIBOBJ(../arch/ia64/flush_icache_block)
  273: 		test "$skipcode" || skipcode="nop.i 0"
  274: 		#".skip 16" passes the test below,
  275: 		# but gives an assembler error in engine
  276: 		;;
  277:         m68k)
  278: 		machine=m68k
  279: 		CFLAGS="$CFLAGS -fomit-frame-pointer"
  280: 		if test "$host_os" = "nextstep3"
  281: 		then
  282: 			AC_LIBOBJ(termios)
  283: 		fi
  284: 		;;
  285: 	mips*)
  286: 		machine=mips
  287: 		#dynamic native code has the following problems on MIPS:
  288: 		#
  289: 		#1) J/JAL seems relocatable, but is are only
  290: 		#relocatable within a 256MB-segment.  While we try to
  291: 		#get the linker to arrange this, there is no guarantee
  292: 		#that this will succeed (and if the user uses a lot of
  293: 		#memory, it is likely to fail).
  294: 		#
  295: 		#2) The way we generate dynamic native code may
  296: 		#violate MIPS architectural restrictions (in
  297: 		#particular, the delay slots of LW, MFLO, etc.)
  298: 		#
  299: 		#Therefore we disable dynamic native code by default:
  300: 		if test -z $no_dynamic_default; then
  301: 		    no_dynamic_default=1
  302: 		    AC_MSG_WARN([Disabling default dynamic native code generation (relocation and delay slot issues)])
  303: 		fi
  304: 		;;
  305: 	alpha*)
  306: 		machine=alpha
  307: 		#full IEEE FP support for more uniformity across platforms:
  308: 		CFLAGS="$CFLAGS -mieee"
  309: 		;;
  310: 	power*|rs6000)
  311: 		machine=power
  312: 		$srcdir/mkinstalldirs arch/power
  313: 		AC_CHECK_FUNC(_sync_cache_range,[true],[AC_LIBOBJ(../arch/power/_sync_cache_range)])
  314: 		#long long is broken on (at least) gcc-2.95.* for PPC
  315: 		test x$ac_cv_sizeof_long_long = x && 
  316: 		($CC -v 2>&1 |grep -q 'gcc version 2.95') &&
  317: 		ac_cv_sizeof_long_long=0
  318:                 #The only architecture with enough callee-saved registers
  319:                 test x$STACK_CACHE_REGS = x && STACK_CACHE_REGS=3
  320:                 #or use 2, hardly slower at run-time and starts up faster
  321: 		;;
  322: 	*)
  323: 		AC_MSG_WARN([Using a generic machine description])
  324: 		AC_MSG_WARN([Assuming C floats and doubles are IEEE floats and doubles (for SF@ DF@ SF! DF!)])
  325: 		AC_MSG_WARN([FLUSH-ICACHE will do nothing, so END-CODE may not work properly!])
  326: 		machine=generic
  327: 		#I-cache flushing would be needed for dynamic code generation
  328: 		if test -z $no_dynamic_default; then
  329: 		    no_dynamic_default=1
  330: 		    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
  331: 		fi
  332: esac
  333: AC_SUBST(host)
  334: 
  335: MAKEINC=""
  336: 
  337: echo "Check for arch/$machine/$platform/gforth.ld ($EC_MODE)"
  338: if test x$EC_MODE = xtrue
  339: then
  340: 	echo "Check for arch/$machine/$platform/gforth.ld"
  341: 	if test -f arch/$machine/$platform/gforth.ld
  342: 	then
  343: 		LDFLAGS="-T ../arch/$machine/$platform/gforth.ld -Map \$@.map -cref --gc-sections $LDFLAGS"
  344: 		if test x$platform = xnxt; then
  345: 			LIBS="$LIB_PATH/lib/gcc/arm-elf/$($CC --version | grep GCC | cut -d' ' -f3)/interwork/libgcc.a $LIB_PATH/arm-elf/lib/interwork/libc.a $LIBS"
  346: 		fi
  347: 	fi
  348: 	if test -f arch/$machine/$platform/make.inc
  349: 	then
  350: 		MAKEINC="include ../arch/$machine/$platform/make.inc"
  351: 	fi
  352: fi
  353: AC_SUBST(MAKEINC)
  354: 
  355: AC_ARG_VAR(STACK_CACHE_REGS, [number of registers in the maximum stack cache state for gforth-fast and gforth-native (default platform-dependent).])
  356: 
  357: test x$STACK_CACHE_REGS = x && STACK_CACHE_REGS=1
  358: AC_DEFINE_UNQUOTED(STACK_CACHE_REGS, $STACK_CACHE_REGS,
  359: 		   [number of registers in the maximum stack cache state for gforth-fast and gforth-native])
  360: test x$STACK_CACHE_DEFAULT_FAST = x && STACK_CACHE_DEFAULT_FAST=1
  361: AC_DEFINE_UNQUOTED(STACK_CACHE_DEFAULT_FAST, $STACK_CACHE_DEFAULT_FAST,
  362: 		   [number of registers in the default stack cache state for gforth-fast and gforth-native])
  363: 
  364: test x$GCC_PR15242_WORKAROUND = x ||
  365: AC_DEFINE_UNQUOTED(GCC_PR15242_WORKAROUND, $GCC_PR15242_WORKAROUND,
  366:                    [force (1) or forbid (0) use of a workaround for a gcc performance bug])
  367: 
  368: dnl AC_DEFINE(GCC_PR15242_WORKAROUND,,[Define if you want to get dynamic code
  369: dnl generation on gccs affected by PR15242])
  370: 
  371: 
  372: if test "${enable_force_ll+set}" = set; then
  373:    ac_includes_default="$ac_includes_default
  374: #include \"arch/generic/128bit.h\""
  375: fi
  376: 
  377: dnl the following macro produces a warning with autoconf-2.1
  378: AC_CHECK_SIZEOF(char *)
  379: case "$ac_cv_sizeof_char_p" in
  380:   2)
  381:     wordsize=16
  382:     ;;
  383:   4)
  384:     wordsize=32
  385:     ;;
  386:   8)
  387:     wordsize=64
  388:     ;;
  389: esac
  390: 
  391: AC_CHECK_SIZEOF(void *)
  392: case "$ac_cv_sizeof_void_p" in
  393:   2)
  394:     vwordsize=16
  395:     ;;
  396:   4)
  397:     vwordsize=32
  398:     ;;
  399:   8)
  400:     vwordsize=64
  401:     ;;
  402: esac
  403: 
  404: AC_CHECK_SIZEOF(char)
  405: AC_CHECK_SIZEOF(short)
  406: AC_CHECK_SIZEOF(int)
  407: AC_CHECK_SIZEOF(long)
  408: AC_CHECK_SIZEOF(long long)
  409: AC_CHECK_SIZEOF(intptr_t)
  410: AC_CHECK_SIZEOF(int128_t)
  411: AC_CHECK_SIZEOF(uint128_t)
  412: 
  413: AC_MSG_CHECKING([for a C type for cells])
  414: ac_cv_int_type_cell=none
  415: case "$ac_cv_sizeof_char_p" in
  416:   $ac_cv_sizeof_int)
  417:     ac_cv_int_type_cell=int
  418:     ;;
  419:   $ac_cv_sizeof_short)
  420:     ac_cv_int_type_cell=short
  421:     ;;
  422:   $ac_cv_sizeof_char)
  423:     ac_cv_int_type_cell=char
  424:     ;;
  425:   $ac_cv_sizeof_long)
  426:     ac_cv_int_type_cell=long
  427:     ;;
  428:   $ac_cv_sizeof_long_long)
  429:     ac_cv_int_type_cell="long long"
  430:     ;;
  431:   $ac_cv_sizeof_intptr_t)
  432:     ac_cv_int_type_cell="intptr_t"
  433:     ;;
  434:   $ac_cv_sizeof_int128_t)
  435:     ac_cv_int_type_cell="int128_t"
  436:     ;;
  437: esac
  438: AC_MSG_RESULT($ac_cv_int_type_cell)
  439: AC_DEFINE_UNQUOTED(CELL_TYPE,$ac_cv_int_type_cell,[an integer type that is as long as a pointer])
  440: 
  441: AC_MSG_CHECKING([for a C type for wydes])
  442: ac_cv_wyde_type_cell=none
  443: case 2 in
  444:   $ac_cv_sizeof_int)
  445:     ac_cv_wyde_type_cell=int
  446:     ;;
  447:   $ac_cv_sizeof_short)
  448:     ac_cv_wyde_type_cell=short
  449:     ;;
  450:   $ac_cv_sizeof_char)
  451:     ac_cv_wyde_type_cell=char
  452:     ;;
  453:   $ac_cv_sizeof_long)
  454:     ac_cv_wyde_type_cell=long
  455:     ;;
  456:   $ac_cv_sizeof_long_long)
  457:     ac_cv_wyde_type_cell="long long"
  458:     ;;
  459:   $ac_cv_sizeof_intptr_t)
  460:     ac_cv_wyde_type_cell="intptr_t"
  461:     ;;
  462:   $ac_cv_sizeof_int128_t)
  463:     ac_cv_wyde_type_cell="int128_t"
  464:     ;;
  465: esac
  466: AC_MSG_RESULT($ac_cv_wyde_type_cell)
  467: AC_DEFINE_UNQUOTED(WYDE_TYPE,$ac_cv_wyde_type_cell,[an integer type that is 2 bytes long])
  468: 
  469: AC_MSG_CHECKING([for a C type for tetrabytes])
  470: ac_cv_tetrabyte_type_cell=none
  471: case 4 in
  472:   $ac_cv_sizeof_int)
  473:     ac_cv_tetrabyte_type_cell=int
  474:     ;;
  475:   $ac_cv_sizeof_short)
  476:     ac_cv_tetrabyte_type_cell=short
  477:     ;;
  478:   $ac_cv_sizeof_char)
  479:     ac_cv_tetrabyte_type_cell=char
  480:     ;;
  481:   $ac_cv_sizeof_long)
  482:     ac_cv_tetrabyte_type_cell=long
  483:     ;;
  484:   $ac_cv_sizeof_long_long)
  485:     ac_cv_tetrabyte_type_cell="long long"
  486:     ;;
  487:   $ac_cv_sizeof_intptr_t)
  488:     ac_cv_tetrabyte_type_cell="intptr_t"
  489:     ;;
  490:   $ac_cv_sizeof_int128_t)
  491:     ac_cv_tetrabyte_type_cell="int128_t"
  492:     ;;
  493: esac
  494: AC_MSG_RESULT($ac_cv_tetrabyte_type_cell)
  495: AC_DEFINE_UNQUOTED(TETRABYTE_TYPE,$ac_cv_tetrabyte_type_cell,[an integer type that is 4 bytes long])
  496: 
  497: AC_MSG_CHECKING([for a C type for double-cells])
  498: ac_cv_int_type_double_cell=none
  499: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
  500:   $ac_cv_sizeof_short)
  501:     ac_cv_int_type_double_cell=short
  502:     ;;
  503:   $ac_cv_sizeof_int)
  504:     ac_cv_int_type_double_cell=int
  505:     ;;
  506:   $ac_cv_sizeof_long)
  507:     ac_cv_int_type_double_cell=long
  508:     ;;
  509:   $ac_cv_sizeof_long_long)
  510:     ac_cv_int_type_double_cell="long long"
  511:     ;;
  512:   $ac_cv_sizeof_intptr_t)
  513:     ac_cv_int_type_double_cell="intptr_t"
  514:     ;;
  515:   $ac_cv_sizeof_int128_t)
  516:     ac_cv_int_type_double_cell="int128_t"
  517:     ;;
  518: esac
  519: AC_MSG_RESULT($ac_cv_int_type_double_cell)
  520: 
  521: AC_MSG_CHECKING([for a C type for unsigned double-cells])
  522: ac_cv_int_type_double_ucell=none
  523: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
  524:   $ac_cv_sizeof_short)
  525:     ac_cv_int_type_double_ucell="unsigned short"
  526:     ;;
  527:   $ac_cv_sizeof_int)
  528:     ac_cv_int_type_double_ucell="unsigned int"
  529:     ;;
  530:   $ac_cv_sizeof_long)
  531:     ac_cv_int_type_double_ucell="unsigned long"
  532:     ;;
  533:   $ac_cv_sizeof_long_long)
  534:     ac_cv_int_type_double_ucell="unsigned long long"
  535:     ;;
  536:   $ac_cv_sizeof_intptr_t)
  537:     ac_cv_int_type_double_ucell="unsigned intptr_t"
  538:     ;;
  539:   $ac_cv_sizeof_uint128_t)
  540:     ac_cv_int_type_double_ucell="uint128_t"
  541:     ;;
  542: esac
  543: AC_MSG_RESULT($ac_cv_int_type_double_ucell)
  544: 
  545: if test "$ac_cv_int_type_double_cell" = none || \
  546:    test "$ac_cv_int_type_double_ucell" = none
  547: then
  548: 	AC_MSG_WARN([Emulating double-cell arithmetic. This may be slow.])
  549: 	AC_LIBOBJ(dblsub)
  550: 	AC_DEFINE(BUGGY_LONG_LONG,,[define this if there is no working DOUBLE_CELL_TYPE on your machine])
  551: else
  552: 	AC_DEFINE_UNQUOTED(DOUBLE_CELL_TYPE,$ac_cv_int_type_double_cell,[an integer type that is twice as long as a pointer])
  553: 	AC_DEFINE_UNQUOTED(DOUBLE_UCELL_TYPE,$ac_cv_int_type_double_ucell,[an unsigned integer type that is twice as long as a pointer])
  554: fi
  555: 
  556: AC_TYPE_OFF_T
  557: AC_CHECK_SIZEOF(off_t)
  558: test $ac_cv_sizeof_off_t -gt $ac_cv_sizeof_char_p
  559: ac_small_off_t=$?
  560: AC_DEFINE_UNQUOTED(SMALL_OFF_T,$ac_small_off_t,[1 if off_t fits in a Cell])
  561: 
  562: ENGINE_FLAGS=
  563: AC_SUBST(ENGINE_FLAGS)
  564: 
  565: # Try if GCC understands -fno-gcse
  566: 
  567: AC_MSG_CHECKING([if $CC understands -fno-gcse])
  568: CFLAGS_1="$CFLAGS"
  569: CFLAGS="$CFLAGS -fno-gcse"
  570: AC_TRY_COMPILE(,,ac_nogcse=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-gcse",ac_nogcse=no)
  571: CFLAGS="$CFLAGS_1"
  572: AC_MSG_RESULT($ac_nogcse)
  573: 
  574: # Try if GCC understands -fno-strict-aliasing
  575: AC_MSG_CHECKING([if $CC understands -fno-strict-aliasing])
  576: CFLAGS_1="$CFLAGS"
  577: CFLAGS="$CFLAGS -fno-strict-aliasing"
  578: AC_TRY_COMPILE(,,ac_nostrictaliasing=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-strict-aliasing",ac_nostrictaliasing=no)
  579: CFLAGS="$CFLAGS_1"
  580: AC_MSG_RESULT($ac_nostrictaliasing)
  581: 
  582: # Try if GCC understands -fno-crossjumping
  583: AC_MSG_CHECKING([if $CC understands -fno-crossjumping])
  584: CFLAGS_1="$CFLAGS"
  585: CFLAGS="$CFLAGS -fno-crossjumping"
  586: AC_TRY_COMPILE(,,ac_nocrossjumping=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-crossjumping",ac_nocrossjumping=no)
  587: CFLAGS="$CFLAGS_1"
  588: AC_MSG_RESULT($ac_nocrossjumping)
  589: 
  590: # Try if GCC understands -fno-reorder-blocks
  591: AC_MSG_CHECKING([if $CC understands -fno-reorder-blocks])
  592: CFLAGS_1="$CFLAGS"
  593: CFLAGS="$CFLAGS -fno-reorder-blocks"
  594: AC_TRY_COMPILE(,,ac_noreorder_blocks=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-reorder-blocks",ac_noreorder_blocks=no)
  595: CFLAGS="$CFLAGS_1"
  596: AC_MSG_RESULT($ac_noreorder_blocks)
  597: 
  598: # Try if GCC understands -falign-labels=1
  599: AC_MSG_CHECKING([if $CC understands -falign-labels=1])
  600: CFLAGS_1="$CFLAGS"
  601: CFLAGS="$CFLAGS -falign-labels=1"
  602: AC_TRY_COMPILE(,,ac_align_labels=yes;ENGINE_FLAGS="$ENGINE_FLAGS -falign-labels=1",ac_align_labels=no)
  603: CFLAGS="$CFLAGS_1"
  604: AC_MSG_RESULT($ac_align_labels)
  605: 
  606: # Try if GCC understands -falign-loops=1
  607: AC_MSG_CHECKING([if $CC understands -falign-loops=1])
  608: CFLAGS_1="$CFLAGS"
  609: CFLAGS="$CFLAGS -falign-loops=1"
  610: AC_TRY_COMPILE(,,ac_align_loops=yes;ENGINE_FLAGS="$ENGINE_FLAGS -falign-loops=1",ac_align_loops=no)
  611: CFLAGS="$CFLAGS_1"
  612: AC_MSG_RESULT($ac_align_loops)
  613: 
  614: # Try if GCC understands -falign-jumps=1
  615: AC_MSG_CHECKING([if $CC understands -falign-jumps=1])
  616: CFLAGS_1="$CFLAGS"
  617: CFLAGS="$CFLAGS -falign-jumps=1"
  618: AC_TRY_COMPILE(,,ac_align_jumps=yes;ENGINE_FLAGS="$ENGINE_FLAGS -falign-jumps=1",ac_align_jumps=no)
  619: CFLAGS="$CFLAGS_1"
  620: AC_MSG_RESULT($ac_align_jumps)
  621: 
  622: # Try if GCC understands __attribute__((unused))
  623: AC_MSG_CHECKING([how to suppress 'unused variable' warnings])
  624: AC_TRY_COMPILE(,[int __attribute__((unused)) foo;], MAYBE_UNUSED='__attribute__((unused))',)
  625: AC_DEFINE_UNQUOTED(MAYBE_UNUSED,$MAYBE_UNUSED,[attribute for possibly unused variables])
  626: AC_MSG_RESULT($MAYBE_UNUSED)
  627: 
  628: #try if m4 understands -s
  629: AC_MSG_CHECKING([how to invoke m4])
  630: if m4 -s /dev/null >/dev/null 2>&1; then
  631:  M4="m4 -s"
  632: else
  633:  M4=m4
  634: fi
  635: AC_SUBST(M4)
  636: AC_DEFINE_UNQUOTED(M4,"$M4",[How to invoke m4])
  637: AC_MSG_RESULT($M4)
  638: 
  639: # Find installed Gforth
  640: AC_MSG_CHECKING([for gforth])
  641: GFORTH="`which gforth 2>/dev/null`"
  642: if test ! -z "$GFORTH"; then  GFORTH="$GFORTH -m4M" ; fi
  643: AC_SUBST(GFORTH)
  644: AC_DEFINE_UNQUOTED(GFORTH,"$GFORTH",[How to invoke gforth])
  645: AC_MSG_RESULT($GFORTH)
  646: 
  647: echo "machine='$machine'"
  648: 
  649: dnl AC_CHECK_PROG(asm_fs,asm.fs,arch/$machine/asm.fs,,$srcdir/arch/$machine)
  650: AC_CHECK_FILE($srcdir/arch/$machine/asm.fs,[asm_fs=arch/$machine/asm.fs],)
  651: AC_SUBST(asm_fs)
  652: 
  653: dnl AC_CHECK_PROG(disasm_fs,disasm.fs,arch/$machine/disasm.fs,,$srcdir/arch/$machine)
  654: AC_CHECK_FILE($srcdir/arch/$machine/disasm.fs,[disasm_fs=arch/$machine/disasm.fs],)
  655: AC_SUBST(disasm_fs)
  656: 
  657: AC_PATH_PROG(INSTALL_INFO,install-info,[echo '>>>>Please make info dir entry:'],$PATH:/sbin:/usr/sbin:/usr/local/sbin)
  658: 
  659: case "$host_os" in
  660: 	*win32*)
  661: 		# !!!FIXME!!! problems with cygwin and ';' as path separator
  662: 		DIRSEP="\\\\"
  663: 		PATHSEP=";"
  664: 		#we want the builtins of command.com/cmd.exe and its
  665: 		# handling of .com files.
  666: 		#$COMSPEC contains the name of the Windows shell;
  667: 		# the ./ is there, because the bash does not recognize
  668: 		# absolute DOS filenames
  669: 		DEFAULTSYSTEMPREFIX="./$COMSPEC /c "
  670: 		;;
  671: 	*darwin*)
  672: 		#Darwin uses some funny preprocessor by default; eliminate it:
  673: 		AC_MSG_NOTICE([using -no-cpp-precomp on Darwin])
  674: 		CFLAGS="$CFLAGS -no-cpp-precomp"
  675: 		DIRSEP="/"
  676: 		PATHSEP=":"
  677: 		DEFAULTSYSTEMPREFIX=""
  678: 		;;
  679: 	*)
  680: 		DIRSEP="/"
  681: 		PATHSEP=":"
  682: 		DEFAULTSYSTEMPREFIX=""
  683: 		;;
  684: esac
  685: AC_SUBST(DIRSEP)
  686: AC_DEFINE_UNQUOTED(DIRSEP,'$DIRSEP',[a directory separator character])
  687: AC_SUBST(PATHSEP)
  688: AC_DEFINE_UNQUOTED(PATHSEP,'$PATHSEP',[a path separator character])
  689: AC_SUBST(DEFAULTSYSTEMPREFIX)
  690: AC_DEFINE_UNQUOTED(DEFAULTSYSTEMPREFIX,"$DEFAULTSYSTEMPREFIX",[default for environment variable GFORTHSYSTEMPREFIX])
  691: 
  692: #work around SELinux brain damage (from Andrew Haley <12t8f3jakb74g2c@news.supernews.com>)
  693: #This magic incantation  seems to be completely undocumented.
  694: AC_CHECK_PROG([MASSAGE_EXE],[chcon],[chcon -t unconfined_execmem_exec_t],[true])
  695: 
  696: dnl Now a little support for DOS/DJGCC
  697: AC_SUBST(GFORTH_EXE)
  698: GFORTH_EXE=""
  699: AC_SUBST(GFORTHFAST_EXE)
  700: GFORTHFAST_EXE=""
  701: AC_SUBST(GFORTHITC_EXE)
  702: GFORTHITC_EXE=""
  703: AC_SUBST(GFORTHDITC_EXE)
  704: GFORTHDITC_EXE=""
  705: 
  706: AC_SUBST(FORTHSIZES)
  707: 
  708: dnl if test "$PEEPHOLE" = "yes"
  709: dnl then
  710: dnl    PEEPHOLEFLAG="true"
  711: dnl    AC_DEFINE(HAS_PEEPHOLE,,[Define if you want to use peephole optimization])
  712: dnl else
  713: dnl    PEEPHOLEFLAG="false"
  714: dnl fi
  715: PEEPHOLEFLAG="true"
  716: AC_SUBST(PEEPHOLEFLAG)
  717: 
  718: dnl copy commands for systems that don't have links
  719: AC_SUBST(LINK_KERNL)
  720: LINK_KERNL=""
  721: 
  722: #if test $host_os=dos
  723: #then
  724: #  echo Configuring for DOS!!!
  725: #  MAKE_EXE="coff2exe gforth"
  726: #  LINK_KERNL='$(CP) kernl32l.fi kernel.fi'
  727: #fi
  728: 
  729: dnl the following macro produces a warning with autoconf-2.1
  730: AC_C_BIGENDIAN
  731: AC_SUBST(KERNEL)
  732: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
  733: if test $ac_cv_c_bigendian = yes; then
  734:   bytesex=b
  735:   KERNEL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
  736: else
  737:   bytesex=l
  738:   KERNEL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
  739: fi
  740: 
  741: #check how to do asm(".skip 16")
  742: #echo "CFLAGS=$CFLAGS"
  743: #echo "ac_link=$ac_link"
  744: AC_MSG_CHECKING([if and how we can waste code space])
  745: if test -z "$skipcode"; then
  746:     skipcode=no
  747:     CFLAGS_1="$CFLAGS"
  748:     CFLAGS="$CFLAGS $ENGINE_FLAGS"
  749:     for i in ".skip 16" ".block 16" ".org .+16" ".=.+16" ".space 16"
  750:     do
  751: 	AC_TRY_RUN(
  752: [int foo(int,int,int);
  753: main()
  754: {
  755:   exit(foo(0,0,0)!=16);
  756: }
  757: int foo(int x, int y, int z)
  758: {
  759:   static void *labels[]={&&label1, &&label2};
  760:   if (x) {
  761:     y++; /* workaround for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12108 */
  762:   label1:
  763:     asm("$i"); /* or ".space 16" or somesuch */
  764:   label2: ;
  765:   }
  766:   {
  767:   if (y) goto *labels[z]; /* workaround for gcc PR12108 */
  768:   return labels[1]-labels[0];
  769:   }
  770: }]
  771: 	,skipcode=$i; break
  772: 	,,)
  773:     done
  774:     CFLAGS=$CFLAGS_1
  775: fi
  776: AC_MSG_RESULT($skipcode)
  777: if test "$skipcode" = no
  778: then 
  779:     if test -z $no_dynamic_default; then
  780: 	no_dynamic_default=1
  781: 	AC_MSG_WARN(Disabling default dynamic native code generation)
  782:     fi
  783:     AC_DEFINE_UNQUOTED(SKIP16,((void)0),statement for skipping 16 bytes)
  784: else
  785:     AC_DEFINE_UNQUOTED(SKIP16,asm("$skipcode"),statement for skipping 16 bytes)
  786: fi
  787: 
  788: AC_MSG_CHECKING([if and how we can do comments in asm statements])
  789: #the point here is to get asm statements that look different to
  790: #gcc's "optimizer"
  791: if test -z "$asmcomment"; then
  792:     asmcomment=no
  793:     CFLAGS_1="$CFLAGS"
  794:     CFLAGS="$CFLAGS $ENGINE_FLAGS"
  795:     for i in '"# "' '"! "' '"; "'; do
  796: 	AC_TRY_COMPILE(,[asm($i"fluffystunk");],asmcomment=$i; break,)
  797:     done
  798:     CFLAGS=$CFLAGS_1
  799: fi
  800: AC_MSG_RESULT($asmcomment)
  801: if test "$asmcomment" != no
  802: then 
  803:     AC_DEFINE_UNQUOTED(ASMCOMMENT,$asmcomment,[assembler comment start string])
  804: fi
  805: 
  806: test "$no_dynamic_default" || no_dynamic_default=0
  807: AC_DEFINE_UNQUOTED(NO_DYNAMIC_DEFAULT,$no_dynamic_default,default value for no_dynamic)
  808: 
  809: dnl Checks for programs.
  810: AC_PROG_LN_S
  811: AC_PROG_INSTALL
  812: AC_CHECK_PROGS(TEXI2DVI,texi2dvi4a2ps texi2dvi)
  813: 
  814: dnl MacOS X has a libtool that does something else
  815: AC_CHECK_PROGS(GNU_LIBTOOL,glibtool libtool)
  816: 
  817: dnl Checks for library functions
  818: dnl This check is just for making later checks link with libm.
  819: dnl using sin here is no good idea since it is built-into gcc and typechecked
  820: AC_CHECK_LIB(m,asin)
  821: AC_CHECK_LIB(ltdl,lt_dlinit)
  822: AC_CHECK_LIB(dl,dlopen)
  823: dnl check for libffi 2.x
  824: AC_CHECK_LIB(ffi,ffi_call)
  825: if test $ac_cv_lib_ffi_ffi_call = yes
  826: then
  827: LIBFFIFLAG="true"
  828: FFCALLFLAG="false"
  829: OLDCALLFLAG="false"
  830: AC_DEFINE(HAS_LIBFFI,,[define this if you want to use the ffcall interface with libffi 2.0])
  831: else
  832: dnl check for ffcall libraries
  833: dnl unfortunately, these four calls are separated out into a library each.
  834: AC_CHECK_LIB(avcall,__builtin_avcall)
  835: AC_CHECK_LIB(callback,__vacall_r)
  836: AC_CHECK_LIB(vacall,vacall)
  837: AC_CHECK_LIB(trampoline,alloc_trampoline)
  838: LIBFFIFLAG="false"
  839: FFCALLFLAG="false"
  840: OLDCALLFLAG="true"
  841: test $ac_cv_lib_avcall___builtin_avcall = yes && FFCALLFLAG="true" && OLDCALLFLAG="false" && AC_DEFINE(HAS_FFCALL,,[define this if you want to use the ffcall libraries])
  842: test $ac_cv_lib_avcall___builtin_avcall = no && AC_DEFINE(HAS_OLDCALL,,[define this if you want to use the old call libraries])
  843: fi
  844: AC_SUBST(LIBFFIFLAG)
  845: AC_SUBST(FFCALLFLAG)
  846: AC_SUBST(OLDCALLFLAG)
  847: if test "$host_os" != "nextstep3"
  848: then
  849: 	AC_FUNC_MEMCMP
  850: fi
  851: AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal atanh)
  852: AC_FUNC_FSEEKO
  853: AC_CHECK_FUNCS(ftello dlopen sys_siglist getrusage nanosleep)
  854: AC_CHECK_TYPES(stack_t,,,[#include <signal.h>])
  855: AC_DECL_SYS_SIGLIST
  856: AC_CHECK_FUNC(getopt_long,[true],[AC_LIBOBJ(getopt) AC_LIBOBJ(getopt1)])
  857: AC_CHECK_FUNCS(expm1 log1p)
  858: AC_REPLACE_FUNCS(rint ecvt)
  859: dnl No check for select, because our replacement is no good under
  860: dnl anything but DOS
  861: AC_CHECK_HEADERS(sys/mman.h fnmatch.h)
  862: AC_FUNC_FNMATCH
  863: test $ac_cv_func_fnmatch_works = yes || AC_LIBOBJ(fnmatch)
  864: AC_CHECK_FUNCS(mmap sysconf getpagesize)
  865: AM_PATH_LISPDIR
  866: 
  867: kernel_fi=kernl${vwordsize}${bytesex}.fi
  868: include_fi=kernl${wordsize}${bytesex}${EC}.fi
  869: AC_SUBST(kernel_fi)
  870: AC_SUBST(include_fi)
  871: 
  872: #this breaks bindists
  873: #dnl replace srource directory by absolute value
  874: #if test $srcdir = "."; then srcdir=`pwd` 
  875: #fi
  876: 
  877: AC_SUBST(machine)
  878: AC_CONFIG_FILES([
  879: Makefile
  880: Makedist
  881: gforthmi
  882: vmgen
  883: machpc.fs
  884: envos.fs
  885: engine/Makefile
  886: engine/libcc.h
  887: doc/version.texi
  888: build-ec ])
  889: AC_CONFIG_COMMANDS([stamp-h],[[echo timestamp > stamp-h
  890: chmod +x gforthmi
  891: chmod +x vmgen
  892: chmod +x build-ec
  893: test -d kernel||mkdir kernel
  894: $srcdir/mkinstalldirs include/gforth/$PACKAGE_VERSION
  895: ln -sf ../../../engine/config.h ../../../engine/libcc.h include/gforth/$PACKAGE_VERSION]],[[PACKAGE_VERSION=$PACKAGE_VERSION]])
  896: AC_OUTPUT
  897: 

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