File:  [gforth] / gforth / configure.in
Revision 1.184: download - view: text, annotated - select for diffs
Sun Apr 22 20:06:25 2007 UTC (12 years, 4 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
NXT Gforth now compiles (but doesn't run yet)

    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 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 2
   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, write to the Free Software
   19: #Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   20: 
   21: 
   22: dnl We use some automake macros here,
   23: dnl but don't use automake for creating Makefile.in
   24: AC_INIT([gforth],[0.6.9-20070401],[https://savannah.gnu.org/bugs/?func=addbug&group=gforth])
   25: AC_PREREQ(2.54)
   26: #snapshots have numbers major.minor.release-YYYYMMDD
   27: #note that lexicographic ordering must be heeded.
   28: #I.e., 0.4.1-YYYYMMDD must not exist before 0.4.1!
   29: UPDATED="April 09, 2006"
   30: AC_SUBST(UPDATED)
   31: AC_CONFIG_HEADERS(engine/config.h)
   32: 
   33: #suppress the "-g -O2" default
   34: test "$CFLAGS" || CFLAGS=-O2
   35: 
   36: AC_ARG_ENABLE(force-reg,
   37: 	AC_HELP_STRING([--enable-force-reg],
   38: 		        [ Use explicit register declarations if they appear in
   39: 			  the machine.h file. This can cause a good speedup,
   40: 			  but also incorrect code with some gcc versions on
   41: 			  some processors (default disabled).]),
   42: 	,enable_force_reg=no)
   43: test "$enable_force_reg" = "no"||
   44:   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)])
   45: 
   46: AC_ARG_ENABLE(force-ll,
   47: 	AC_HELP_STRING([--enable-force-ll],
   48: 		       [  Use explicit long long declarations if they appear in
   49: 			  the machine.h file. This can cause a good speedup,
   50: 			  but also incorrect code with some gcc versions on
   51: 			  some processors (default disabled).]),
   52: 	,enable_force_ll=no)
   53: test "$enable_force_ll" = "no"||
   54:   AC_DEFINE(FORCE_LL,,[Define if you want to use explicit long long declarations for better performance (does not work with all GCC versions on all machines)])
   55: 
   56: AC_ARG_ENABLE(force-cdiv,
   57: 	AC_HELP_STRING([--enable-force-cdiv],
   58: 		       [  Use the native C division - symmetric - instead of
   59: 		          floored division (default disabled).]),
   60: 	,enable_force_cdiv=no)
   61: test "$enable_force_cdiv" = "no"||
   62:   AC_DEFINE(FORCE_CDIV,,[Define if you want to use explicit symmetric division for better performance])
   63: 
   64: AC_SUBST(PROFEXES)
   65: AC_SUBST(PROFOBJS)
   66: AC_ARG_ENABLE(prof,
   67: 	AC_HELP_STRING([--enable-prof],
   68: 			[ Build gforth-prof, which outputs frequently occuring
   69:                           sequences of primitives.]),
   70: 	,enable_prof=no)
   71: if test "$enable_prof" = "no"; then
   72:   PROFEXES="gforth-prof\$(EXE)"; PROFOBJS="engine-prof.o main-prof.o profile.o"
   73: fi
   74: 
   75: AC_ARG_WITH(debug,
   76: [  --with-debug		  specifies option -g to compile with debug info
   77:   --without-debug	  omits the -g switch and creates smaller images on
   78: 			  machines where "strip" has problems with gcc style
   79: 			  debugging informations.],
   80: if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
   81: 
   82: dnl PEEPHOLE="yes"
   83: dnl AC_ARG_WITH(peephole,
   84: dnl [  --with-peephole	Enable peephole optimization (default)
   85: dnl   --without-peephole	disables peephole optimization. Creates smaller,
   86: dnl 			but slower images.],
   87: dnl PEEPHOLE="$withval")
   88: 
   89: AC_ARG_WITH(ec,
   90: 	AC_HELP_STRING([--with-ec=<arch>],
   91: 			[  Build gforth for systems without OS.]),
   92: [if test "$withval" = "no"; then
   93:   echo "defining hosted system"
   94:   EC_MODE="false"
   95:   EC=""
   96:   engine2="engine2.o"
   97:   engine_fast2="engine-fast2.o"
   98:   no_dynamic=""
   99:   image_i=""
  100:   signals_o="io.o signals.o"
  101:   GCC_LD="\$(GCC)"
  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); gcc-2.95 recommended.])
  124: AC_ARG_VAR(FORTHSIZES, [Gforth command line options for the default stack and dictionary sizes (see INSTALL).])
  125: AC_ARG_VAR(STACK_CACHE_DEFAULT_FAST, [number of registers in the default stack cache state for gforth-fast and gforth-native (default 1).])
  126: 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)])
  127: 
  128: AC_ARG_VAR(ac_cv_sizeof_char_p, [sizeof(char *)])
  129: AC_ARG_VAR(ac_cv_sizeof_void_p, [sizeof(void *)])
  130: AC_ARG_VAR(ac_cv_sizeof_char, [sizeof(char)])
  131: AC_ARG_VAR(ac_cv_sizeof_short, [sizeof(short)])
  132: AC_ARG_VAR(ac_cv_sizeof_int, [sizeof(int)])
  133: AC_ARG_VAR(ac_cv_sizeof_long, [sizeof(long)])
  134: AC_ARG_VAR(ac_cv_sizeof_long_long, [sizeof(long long)])
  135: AC_ARG_VAR(ac_cv_sizeof_intptr_t, [sizeof(intptr_t)])
  136: AC_ARG_VAR(ac_cv_sizeof_int128_t, [sizeof(int128_t)])
  137: AC_ARG_VAR(ac_cv_sizeof_uint128_t, [sizeof(uint128_t)])
  138: AC_ARG_VAR(ac_cv_c_bigendian, [Is the target big-endian ("yes" or "no")?])
  139: AC_ARG_VAR(no_dynamic_default, [run gforth with --dynamic (0) or --no-dynamic (1) by default])
  140: AC_ARG_VAR(skipcode, [assembly code for skipping 16 bytes of code])
  141: AC_ARG_VAR(asmcomment, [assembler comment start string])
  142: AC_ARG_VAR(arm_cacheflush, [file containing ARM cacheflush function (without .c)])
  143: 
  144: #set up feature test macros, so the tests get them right:
  145: # turn on all POSIX, SUSv3, and GNU features if available
  146: AC_GNU_SOURCE
  147: dnl AC_DEFINE_UNQUOTED([_GNU_SOURCE],1,[feature test macro])
  148: 
  149: dnl Don't define _POSIX_SOURCE etc. because some OSs (in particular
  150: dnl MacOSX) disable some features then (MacOSX checks for _POSIX_SOURCE,
  151: dnl but not for _XOPEN_SOURCE)
  152: dnl AC_DEFINE_UNQUOTED([_POSIX_SOURCE],1,[feature test macro])
  153: dnl AC_DEFINE_UNQUOTED([_POSIX_C_SOURCE],199506L,[feature test macro])
  154: dnl AC_DEFINE_UNQUOTED([_XOPEN_SOURCE],600,[feature test macro])
  155: # turn on large file support with 64-bit off_t where available
  156: AC_SYS_LARGEFILE
  157: dnl AC_DEFINE_UNQUOTED([_LARGEFILE_SOURCE],1,[feature test macro])
  158: dnl AC_DEFINE_UNQUOTED([_FILE_OFFSET_BITS],64,[feature test macro])
  159: 
  160: #currently we force direct threading this way.  Eventually we should
  161: #setup in the arch and engine files right
  162: 
  163: AC_PROG_CC
  164: 
  165: test "$GCC" = "yes" || AC_MSG_ERROR(Gforth uses GNU C extensions and requires GCC 2.0 or higher)
  166: 
  167: AC_SUBST(CC)
  168: AC_SUBST(GCC_LD)
  169: AC_SUBST(DEBUGFLAG)
  170: AC_SUBST(EC)
  171: AC_SUBST(EC_MODE)
  172: AC_SUBST(engine2)
  173: AC_SUBST(engine_fast2)
  174: AC_SUBST(no_dynamic)
  175: AC_SUBST(image_i)
  176: AC_SUBST(signals_o)
  177: 
  178: #this is used to disable some (not generally essential) part of the
  179: #Makefile that some makes don't grok.  It would be better to test for
  180: #this specific Makefile feature than the make version.
  181: AC_MSG_CHECKING(make type)
  182: make_type=`make -n -v 2>&1|grep 'ake'|sed 's/ake .*/ake/'`
  183: GNUMAKE='#'
  184: test "$make_type" = "GNU Make" && GNUMAKE=''
  185: AC_MSG_RESULT($make_type)
  186: AC_SUBST(GNUMAKE)
  187: 
  188: AC_MSG_CHECKING([whether the linker accepts -export-dynamic])
  189: OLDLDFLAGS=$LDFLAGS
  190: LDFLAGS="$LDFLAGS -export-dynamic"
  191: dnl AC_TRY_LINK gives false positive on rs6000-ibm-aix4.2.1.0
  192: dnl AC_TRY_LINK(,,ac_export_dynamic=yes,ac_export_dynamic=no)
  193: AC_TRY_RUN(main(){exit(0);},ac_export_dynamic=yes,ac_export_dynamic=no,ac_export_dynamic=no)
  194: test $ac_export_dynamic = yes|| LDFLAGS=$OLDLDFLAGS
  195: AC_MSG_RESULT($ac_export_dynamic)
  196: 
  197: #terminology is a bit unusual here: The host is the system on which
  198: #gforth will run; the system on which configure will run is the `build'
  199: AC_CANONICAL_HOST
  200: case "$host_cpu" in
  201: 	arm*)
  202: 		machine=arm
  203: 		CFLAGS="$CFLAGS -fomit-frame-pointer"
  204: 		if test x$platform = xnxt; then
  205: 		   CFLAGS="$CFLAGS -mthumb -mthumb-interwork"
  206: 		fi
  207: 		if test -z $arm_cacheflush; then
  208: 		    no_dynamic_default=1
  209:                     arm_cacheflush=arch/arm/cacheflush0
  210: 		    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
  211: 		fi
  212:                 AC_LIBSOURCES([../arch/arm/cacheflush0, ../arch/arm/cacheflush1, ../arch/arm/cacheflush2])
  213:                 AC_LIBOBJ(../$arm_cacheflush)
  214:                 #longer skipcodes lead to problems on ARM, and it uses
  215:                 #only 4-byte alignment anyway
  216: 		test "$skipcode" || skipcode="nop"
  217: 		;;
  218: 	hppa*)
  219: 		machine=hppa
  220: 		$srcdir/mkinstalldirs arch/hppa
  221: 		AC_LIBOBJ(../arch/hppa/cache)
  222: 		#-N needed for --dynamic <M4U3b.3790$9d.317@news.cpqcorp.net>
  223: 		LDFLAGS="$LDFLAGS -Xlinker -N"
  224: 		LIBS="$LIBS -L/lib/pa1.1/"
  225: 		;;
  226: 	sparc*)
  227: 		machine=sparc
  228: 		;;
  229: 	i386)
  230: 		machine=386
  231: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
  232: 		;;
  233: 	i486)
  234: 		machine=386
  235: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem -m486"
  236: 		;;
  237: 	i*86)
  238: 		machine=386
  239: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
  240: 		CFLAGS_1="$CFLAGS"
  241: 		CFLAGS="$CFLAGS -march=pentium"
  242: 		AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1 -m486")
  243: 		;;
  244: 	x86_64)
  245: 		machine=amd64
  246: 		;;
  247: 	ia64*)
  248: 		machine=ia64
  249: 		AC_LIBOBJ(../arch/ia64/flush_icache_block)
  250: 		test "$skipcode" || skipcode="nop.i 0"
  251: 		#".skip 16" passes the test below,
  252: 		# but gives an assembler error in engine
  253: 		;;
  254:         m68k)
  255: 		machine=m68k
  256: 		CFLAGS="$CFLAGS -fomit-frame-pointer"
  257: 		if test "$host_os" = "nextstep3"
  258: 		then
  259: 			AC_LIBOBJ(termios)
  260: 		fi
  261: 		;;
  262: 	mips*)
  263: 		machine=mips
  264: 		#dynamic native code has the following problems on MIPS:
  265: 		#
  266: 		#1) J/JAL seems relocatable, but is are only
  267: 		#relocatable within a 256MB-segment.  While we try to
  268: 		#get the linker to arrange this, there is no guarantee
  269: 		#that this will succeed (and if the user uses a lot of
  270: 		#memory, it is likely to fail).
  271: 		#
  272: 		#2) The way we generate dynamic native code may
  273: 		#violate MIPS architectural restrictions (in
  274: 		#particular, the delay slots of LW, MFLO, etc.)
  275: 		#
  276: 		#Therefore we disable dynamic native code by default:
  277: 		if test -z $no_dynamic_default; then
  278: 		    no_dynamic_default=1
  279: 		    AC_MSG_WARN([Disabling default dynamic native code generation (relocation and delay slot issues)])
  280: 		fi
  281: 		;;
  282: 	alpha*)
  283: 		machine=alpha
  284: 		#full IEEE FP support for more uniformity across platforms:
  285: 		CFLAGS="$CFLAGS -mieee"
  286: 		;;
  287: 	power*|rs6000)
  288: 		machine=power
  289: 		$srcdir/mkinstalldirs arch/power
  290: 		AC_CHECK_FUNC(_sync_cache_range,[true],[AC_LIBOBJ(../arch/power/_sync_cache_range)])
  291: 		#long long is broken on (at least) gcc-2.95.* for PPC
  292: 		test x$ac_cv_sizeof_long_long = x && 
  293: 		($CC -v 2>&1 |grep -q 'gcc version 2.95') &&
  294: 		ac_cv_sizeof_long_long=0
  295: 		;;
  296: 	*)
  297: 		AC_MSG_WARN([Using a generic machine description])
  298: 		AC_MSG_WARN([Assuming C floats and doubles are IEEE floats and doubles (for SF@ DF@ SF! DF!)])
  299: 		AC_MSG_WARN([FLUSH-ICACHE will do nothing, so END-CODE may not work properly!])
  300: 		machine=generic
  301: 		#I-cache flushing would be needed for dynamic code generation
  302: 		if test -z $no_dynamic_default; then
  303: 		    no_dynamic_default=1
  304: 		    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
  305: 		fi
  306: esac
  307: AC_SUBST(host)
  308: 
  309: MAKEINC=""
  310: 
  311: echo "Check for arch/$machine/$platform/gforth.ld ($EC_MODE)"
  312: if test x$EC_MODE = xtrue
  313: then
  314: 	echo "Check for arch/$machine/$platform/gforth.ld"
  315: 	if test -f arch/$machine/$platform/gforth.ld
  316: 	then
  317: 		LDFLAGS="-T ../arch/$machine/$platform/gforth.ld -Map \$@.map -cref --gc-sections $LDFLAGS"
  318: 		if test x$platform = xnxt; then
  319: 			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 $LIBS"
  320: 		fi
  321: 	fi
  322: 	if test -f arch/$machine/$platform/make.inc
  323: 	then
  324: 		MAKEINC="include ../arch/$machine/$platform/make.inc"
  325: 	fi
  326: fi
  327: AC_SUBST(MAKEINC)
  328: 
  329: test x$STACK_CACHE_DEFAULT_FAST = x && STACK_CACHE_DEFAULT_FAST=1
  330: AC_DEFINE_UNQUOTED(STACK_CACHE_DEFAULT_FAST, $STACK_CACHE_DEFAULT_FAST,
  331: 		   [number of registers in the default stack cache state for gforth-fast and gforth-native])
  332: 
  333: test x$GCC_PR15242_WORKAROUND = x ||
  334: AC_DEFINE_UNQUOTED(GCC_PR15242_WORKAROUND, $GCC_PR15242_WORKAROUND,
  335:                    [force (1) or forbid (0) use of a workaround for a gcc performance bug])
  336: 
  337: dnl AC_DEFINE(GCC_PR15242_WORKAROUND,,[Define if you want to get dynamic code
  338: dnl generation on gccs affected by PR15242])
  339: 
  340: 
  341: if test "${enable_force_ll+set}" = set; then
  342:    ac_includes_default="$ac_includes_default
  343: #include \"arch/generic/128bit.h\""
  344: fi
  345: 
  346: dnl the following macro produces a warning with autoconf-2.1
  347: AC_CHECK_SIZEOF(char *)
  348: case "$ac_cv_sizeof_char_p" in
  349:   2)
  350:     wordsize=16
  351:     ;;
  352:   4)
  353:     wordsize=32
  354:     ;;
  355:   8)
  356:     wordsize=64
  357:     ;;
  358: esac
  359: 
  360: AC_CHECK_SIZEOF(void *)
  361: case "$ac_cv_sizeof_void_p" in
  362:   2)
  363:     vwordsize=16
  364:     ;;
  365:   4)
  366:     vwordsize=32
  367:     ;;
  368:   8)
  369:     vwordsize=64
  370:     ;;
  371: esac
  372: 
  373: AC_CHECK_SIZEOF(char)
  374: AC_CHECK_SIZEOF(short)
  375: AC_CHECK_SIZEOF(int)
  376: AC_CHECK_SIZEOF(long)
  377: AC_CHECK_SIZEOF(long long)
  378: AC_CHECK_SIZEOF(intptr_t)
  379: AC_CHECK_SIZEOF(int128_t)
  380: AC_CHECK_SIZEOF(uint128_t)
  381: 
  382: AC_MSG_CHECKING([for a C type for cells])
  383: ac_cv_int_type_cell=none
  384: case "$ac_cv_sizeof_char_p" in
  385:   $ac_cv_sizeof_int)
  386:     ac_cv_int_type_cell=int
  387:     ;;
  388:   $ac_cv_sizeof_short)
  389:     ac_cv_int_type_cell=short
  390:     ;;
  391:   $ac_cv_sizeof_char)
  392:     ac_cv_int_type_cell=char
  393:     ;;
  394:   $ac_cv_sizeof_long)
  395:     ac_cv_int_type_cell=long
  396:     ;;
  397:   $ac_cv_sizeof_long_long)
  398:     ac_cv_int_type_cell="long long"
  399:     ;;
  400:   $ac_cv_sizeof_intptr_t)
  401:     ac_cv_int_type_cell="intptr_t"
  402:     ;;
  403:   $ac_cv_sizeof_int128_t)
  404:     ac_cv_int_type_cell="int128_t"
  405:     ;;
  406: esac
  407: AC_MSG_RESULT($ac_cv_int_type_cell)
  408: AC_DEFINE_UNQUOTED(CELL_TYPE,$ac_cv_int_type_cell,[an integer type that is as long as a pointer])
  409: 
  410: AC_MSG_CHECKING([for a C type for wydes])
  411: ac_cv_wyde_type_cell=none
  412: case 2 in
  413:   $ac_cv_sizeof_int)
  414:     ac_cv_wyde_type_cell=int
  415:     ;;
  416:   $ac_cv_sizeof_short)
  417:     ac_cv_wyde_type_cell=short
  418:     ;;
  419:   $ac_cv_sizeof_char)
  420:     ac_cv_wyde_type_cell=char
  421:     ;;
  422:   $ac_cv_sizeof_long)
  423:     ac_cv_wyde_type_cell=long
  424:     ;;
  425:   $ac_cv_sizeof_long_long)
  426:     ac_cv_wyde_type_cell="long long"
  427:     ;;
  428:   $ac_cv_sizeof_intptr_t)
  429:     ac_cv_wyde_type_cell="intptr_t"
  430:     ;;
  431:   $ac_cv_sizeof_int128_t)
  432:     ac_cv_wyde_type_cell="int128_t"
  433:     ;;
  434: esac
  435: AC_MSG_RESULT($ac_cv_wyde_type_cell)
  436: AC_DEFINE_UNQUOTED(WYDE_TYPE,$ac_cv_wyde_type_cell,[an integer type that is 2 bytes long])
  437: 
  438: AC_MSG_CHECKING([for a C type for tetrabytes])
  439: ac_cv_tetrabyte_type_cell=none
  440: case 4 in
  441:   $ac_cv_sizeof_int)
  442:     ac_cv_tetrabyte_type_cell=int
  443:     ;;
  444:   $ac_cv_sizeof_short)
  445:     ac_cv_tetrabyte_type_cell=short
  446:     ;;
  447:   $ac_cv_sizeof_char)
  448:     ac_cv_tetrabyte_type_cell=char
  449:     ;;
  450:   $ac_cv_sizeof_long)
  451:     ac_cv_tetrabyte_type_cell=long
  452:     ;;
  453:   $ac_cv_sizeof_long_long)
  454:     ac_cv_tetrabyte_type_cell="long long"
  455:     ;;
  456:   $ac_cv_sizeof_intptr_t)
  457:     ac_cv_tetrabyte_type_cell="intptr_t"
  458:     ;;
  459:   $ac_cv_sizeof_int128_t)
  460:     ac_cv_tetrabyte_type_cell="int128_t"
  461:     ;;
  462: esac
  463: AC_MSG_RESULT($ac_cv_tetrabyte_type_cell)
  464: AC_DEFINE_UNQUOTED(TETRABYTE_TYPE,$ac_cv_tetrabyte_type_cell,[an integer type that is 4 bytes long])
  465: 
  466: AC_MSG_CHECKING([for a C type for double-cells])
  467: ac_cv_int_type_double_cell=none
  468: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
  469:   $ac_cv_sizeof_short)
  470:     ac_cv_int_type_double_cell=short
  471:     ;;
  472:   $ac_cv_sizeof_int)
  473:     ac_cv_int_type_double_cell=int
  474:     ;;
  475:   $ac_cv_sizeof_long)
  476:     ac_cv_int_type_double_cell=long
  477:     ;;
  478:   $ac_cv_sizeof_long_long)
  479:     ac_cv_int_type_double_cell="long long"
  480:     ;;
  481:   $ac_cv_sizeof_intptr_t)
  482:     ac_cv_int_type_double_cell="intptr_t"
  483:     ;;
  484:   $ac_cv_sizeof_int128_t)
  485:     ac_cv_int_type_double_cell="int128_t"
  486:     ;;
  487: esac
  488: AC_MSG_RESULT($ac_cv_int_type_double_cell)
  489: 
  490: AC_MSG_CHECKING([for a C type for unsigned double-cells])
  491: ac_cv_int_type_double_ucell=none
  492: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
  493:   $ac_cv_sizeof_short)
  494:     ac_cv_int_type_double_ucell="unsigned short"
  495:     ;;
  496:   $ac_cv_sizeof_int)
  497:     ac_cv_int_type_double_ucell="unsigned int"
  498:     ;;
  499:   $ac_cv_sizeof_long)
  500:     ac_cv_int_type_double_ucell="unsigned long"
  501:     ;;
  502:   $ac_cv_sizeof_long_long)
  503:     ac_cv_int_type_double_ucell="unsigned long long"
  504:     ;;
  505:   $ac_cv_sizeof_intptr_t)
  506:     ac_cv_int_type_double_ucell="unsigned intptr_t"
  507:     ;;
  508:   $ac_cv_sizeof_uint128_t)
  509:     ac_cv_int_type_double_ucell="uint128_t"
  510:     ;;
  511: esac
  512: AC_MSG_RESULT($ac_cv_int_type_double_ucell)
  513: 
  514: if test "$ac_cv_int_type_double_cell" = none || \
  515:    test "$ac_cv_int_type_double_ucell" = none
  516: then
  517: 	AC_MSG_WARN([Emulating double-cell arithmetic. This may be slow.])
  518: 	AC_LIBOBJ(dblsub)
  519: 	AC_DEFINE(BUGGY_LONG_LONG,,[define this if there is no working DOUBLE_CELL_TYPE on your machine])
  520: else
  521: 	AC_DEFINE_UNQUOTED(DOUBLE_CELL_TYPE,$ac_cv_int_type_double_cell,[an integer type that is twice as long as a pointer])
  522: 	AC_DEFINE_UNQUOTED(DOUBLE_UCELL_TYPE,$ac_cv_int_type_double_ucell,[an unsigned integer type that is twice as long as a pointer])
  523: fi
  524: 
  525: AC_TYPE_OFF_T
  526: AC_CHECK_SIZEOF(off_t)
  527: test $ac_cv_sizeof_off_t -gt $ac_cv_sizeof_char_p
  528: ac_small_off_t=$?
  529: AC_DEFINE_UNQUOTED(SMALL_OFF_T,$ac_small_off_t,[1 if off_t fits in a Cell])
  530: 
  531: ENGINE_FLAGS=
  532: AC_SUBST(ENGINE_FLAGS)
  533: 
  534: # Try if GCC understands -fno-gcse
  535: 
  536: AC_MSG_CHECKING([if $CC understands -fno-gcse])
  537: CFLAGS_1="$CFLAGS"
  538: CFLAGS="$CFLAGS -fno-gcse"
  539: AC_TRY_COMPILE(,,ac_nogcse=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-gcse",ac_nogcse=no)
  540: CFLAGS="$CFLAGS_1"
  541: AC_MSG_RESULT($ac_nogcse)
  542: 
  543: # Try if GCC understands -fno-strict-aliasing
  544: AC_MSG_CHECKING([if $CC understands -fno-strict-aliasing])
  545: CFLAGS_1="$CFLAGS"
  546: CFLAGS="$CFLAGS -fno-strict-aliasing"
  547: AC_TRY_COMPILE(,,ac_nostrictaliasing=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-strict-aliasing",ac_nostrictaliasing=no)
  548: CFLAGS="$CFLAGS_1"
  549: AC_MSG_RESULT($ac_nostrictaliasing)
  550: 
  551: # Try if GCC understands -fno-crossjumping
  552: AC_MSG_CHECKING([if $CC understands -fno-crossjumping])
  553: CFLAGS_1="$CFLAGS"
  554: CFLAGS="$CFLAGS -fno-crossjumping"
  555: AC_TRY_COMPILE(,,ac_nocrossjumping=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-crossjumping",ac_nocrossjumping=no)
  556: CFLAGS="$CFLAGS_1"
  557: AC_MSG_RESULT($ac_nocrossjumping)
  558: 
  559: # Try if GCC understands -fno-reorder-blocks
  560: AC_MSG_CHECKING([if $CC understands -fno-reorder-blocks])
  561: CFLAGS_1="$CFLAGS"
  562: CFLAGS="$CFLAGS -fno-reorder-blocks"
  563: AC_TRY_COMPILE(,,ac_noreorder_blocks=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-reorder-blocks",ac_noreorder_blocks=no)
  564: CFLAGS="$CFLAGS_1"
  565: AC_MSG_RESULT($ac_noreorder_blocks)
  566: 
  567: # Try if GCC understands __attribute__((unused))
  568: AC_MSG_CHECKING([how to suppress 'unused variable' warnings])
  569: AC_TRY_COMPILE(,[int __attribute__((unused)) foo;], MAYBE_UNUSED='__attribute__((unused))',)
  570: AC_DEFINE_UNQUOTED(MAYBE_UNUSED,$MAYBE_UNUSED,[attribute for possibly unused variables])
  571: AC_MSG_RESULT($MAYBE_UNUSED)
  572: 
  573: AC_CHECK_PROG(asm_fs,asm.fs,arch/$machine/asm.fs,,$srcdir/arch/$machine)
  574: AC_SUBST(asm_fs)
  575: 
  576: AC_CHECK_PROG(disasm_fs,disasm.fs,arch/$machine/disasm.fs,,$srcdir/arch/$machine)
  577: AC_SUBST(disasm_fs)
  578: 
  579: AC_PATH_PROG(INSTALL_INFO,install-info,[echo '>>>>Please make info dir entry:'],$PATH:/sbin:/usr/sbin:/usr/local/sbin)
  580: 
  581: case "$host_os" in
  582: 	*win32*)
  583: 		# !!!FIXME!!! problems with cygwin and ';' as path separator
  584: 		DIRSEP="\\\\"
  585: 		PATHSEP=";"
  586: 		#we want the builtins of command.com/cmd.exe and its
  587: 		# handling of .com files.
  588: 		#$COMSPEC contains the name of the Windows shell;
  589: 		# the ./ is there, because the bash does not recognize
  590: 		# absolute DOS filenames
  591: 		DEFAULTSYSTEMPREFIX="./$COMSPEC /c "
  592: 		;;
  593: 	*darwin*)
  594: 		#Darwin uses some funny preprocessor by default; eliminate it:
  595: 		AC_MSG_NOTICE([using -no-cpp-precomp on Darwin])
  596: 		CFLAGS="$CFLAGS -no-cpp-precomp"
  597: 		DIRSEP="/"
  598: 		PATHSEP=":"
  599: 		DEFAULTSYSTEMPREFIX=""
  600: 		;;
  601: 	*)
  602: 		DIRSEP="/"
  603: 		PATHSEP=":"
  604: 		DEFAULTSYSTEMPREFIX=""
  605: 		;;
  606: esac
  607: AC_SUBST(DIRSEP)
  608: AC_DEFINE_UNQUOTED(DIRSEP,'$DIRSEP',[a directory separator character])
  609: AC_SUBST(PATHSEP)
  610: AC_DEFINE_UNQUOTED(PATHSEP,'$PATHSEP',[a path separator character])
  611: AC_SUBST(DEFAULTSYSTEMPREFIX)
  612: AC_DEFINE_UNQUOTED(DEFAULTSYSTEMPREFIX,"$DEFAULTSYSTEMPREFIX",[default for environment variable GFORTHSYSTEMPREFIX])
  613: 
  614: #work around SELinux brain damage (from Andrew Haley <12t8f3jakb74g2c@news.supernews.com>)
  615: #This magic incantation  seems to be completely undocumented.
  616: AC_CHECK_PROG([MASSAGE_EXE],[chcon],[chcon -t unconfined_execmem_exec_t],[true])
  617: 
  618: dnl Now a little support for DOS/DJGCC
  619: AC_SUBST(GFORTH_EXE)
  620: GFORTH_EXE=""
  621: AC_SUBST(GFORTHFAST_EXE)
  622: GFORTHFAST_EXE=""
  623: AC_SUBST(GFORTHITC_EXE)
  624: GFORTHITC_EXE=""
  625: AC_SUBST(GFORTHDITC_EXE)
  626: GFORTHDITC_EXE=""
  627: 
  628: AC_SUBST(FORTHSIZES)
  629: 
  630: dnl if test "$PEEPHOLE" = "yes"
  631: dnl then
  632: dnl    PEEPHOLEFLAG="true"
  633: dnl    AC_DEFINE(HAS_PEEPHOLE,,[Define if you want to use peephole optimization])
  634: dnl else
  635: dnl    PEEPHOLEFLAG="false"
  636: dnl fi
  637: PEEPHOLEFLAG="true"
  638: AC_SUBST(PEEPHOLEFLAG)
  639: 
  640: dnl copy commands for systems that don't have links
  641: AC_SUBST(LINK_KERNL)
  642: LINK_KERNL=""
  643: 
  644: #if test $host_os=dos
  645: #then
  646: #  echo Configuring for DOS!!!
  647: #  MAKE_EXE="coff2exe gforth"
  648: #  LINK_KERNL='$(CP) kernl32l.fi kernel.fi'
  649: #fi
  650: 
  651: dnl the following macro produces a warning with autoconf-2.1
  652: AC_C_BIGENDIAN
  653: AC_SUBST(KERNEL)
  654: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
  655: if test $ac_cv_c_bigendian = yes; then
  656:   bytesex=b
  657:   KERNEL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
  658: else
  659:   bytesex=l
  660:   KERNEL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
  661: fi
  662: 
  663: #check how to do asm(".skip 16")
  664: #echo "CFLAGS=$CFLAGS"
  665: #echo "ac_link=$ac_link"
  666: AC_MSG_CHECKING([if and how we can waste code space])
  667: if test -z "$skipcode"; then
  668:     skipcode=no
  669:     CFLAGS_1="$CFLAGS"
  670:     CFLAGS="$CFLAGS $ENGINE_FLAGS"
  671:     for i in ".skip 16" ".block 16" ".org .+16" ".=.+16" ".space 16"
  672:     do
  673: 	AC_TRY_RUN(
  674: [int foo(int,int,int);
  675: main()
  676: {
  677:   exit(foo(0,0,0)!=16);
  678: }
  679: int foo(int x, int y, int z)
  680: {
  681:   static void *labels[]={&&label1, &&label2};
  682:   if (x) {
  683:     y++; /* workaround for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12108 */
  684:   label1:
  685:     asm("$i"); /* or ".space 16" or somesuch */
  686:   label2: ;
  687:   }
  688:   {
  689:   if (y) goto *labels[z]; /* workaround for gcc PR12108 */
  690:   return labels[1]-labels[0];
  691:   }
  692: }]
  693: 	,skipcode=$i; break
  694: 	,,)
  695:     done
  696:     CFLAGS=$CFLAGS_1
  697: fi
  698: AC_MSG_RESULT($skipcode)
  699: if test "$skipcode" = no
  700: then 
  701:     if test -z $no_dynamic_default; then
  702: 	no_dynamic_default=1
  703: 	AC_MSG_WARN(Disabling default dynamic native code generation)
  704:     fi
  705:     AC_DEFINE_UNQUOTED(SKIP16,((void)0),statement for skipping 16 bytes)
  706: else
  707:     AC_DEFINE_UNQUOTED(SKIP16,asm("$skipcode"),statement for skipping 16 bytes)
  708: fi
  709: 
  710: AC_MSG_CHECKING([if and how we can do comments in asm statements])
  711: #the point here is to get asm statements that look different to
  712: #gcc's "optimizer"
  713: if test -z "$asmcomment"; then
  714:     asmcomment=no
  715:     CFLAGS_1="$CFLAGS"
  716:     CFLAGS="$CFLAGS $ENGINE_FLAGS"
  717:     for i in '"# "' '"! "' '"; "'; do
  718: 	AC_TRY_COMPILE(,[asm($i"fluffystunk");],asmcomment=$i; break,)
  719:     done
  720:     CFLAGS=$CFLAGS_1
  721: fi
  722: AC_MSG_RESULT($asmcomment)
  723: if test "$asmcomment" != no
  724: then 
  725:     AC_DEFINE_UNQUOTED(ASMCOMMENT,$asmcomment,[assembler comment start string])
  726: fi
  727: 
  728: test "$no_dynamic_default" || no_dynamic_default=0
  729: AC_DEFINE_UNQUOTED(NO_DYNAMIC_DEFAULT,$no_dynamic_default,default value for no_dynamic)
  730: 
  731: dnl Checks for programs.
  732: AC_PROG_LN_S
  733: AC_PROG_INSTALL
  734: AC_CHECK_PROGS(TEXI2DVI,texi2dvi4a2ps texi2dvi)
  735: 
  736: dnl Checks for library functions
  737: dnl This check is just for making later checks link with libm.
  738: dnl using sin here is no good idea since it is built-into gcc and typechecked
  739: AC_CHECK_LIB(m,asin)
  740: AC_CHECK_LIB(dl,dlopen)
  741: dnl check for libffi 2.x
  742: AC_CHECK_LIB(ffi,ffi_call)
  743: if test $ac_cv_lib_ffi_ffi_call = yes
  744: then
  745: LIBFFIFLAG="true"
  746: FFCALLFLAG="false"
  747: OLDCALLFLAG="false"
  748: AC_DEFINE(HAS_LIBFFI,,[define this if you want to use the ffcall interface with libffi 2.0])
  749: else
  750: dnl check for ffcall libraries
  751: dnl unfortunately, these four calls are separated out into a library each.
  752: AC_CHECK_LIB(avcall,__builtin_avcall)
  753: AC_CHECK_LIB(callback,__vacall_r)
  754: AC_CHECK_LIB(vacall,vacall)
  755: AC_CHECK_LIB(trampoline,alloc_trampoline)
  756: LIBFFIFLAG="false"
  757: FFCALLFLAG="false"
  758: OLDCALLFLAG="true"
  759: 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])
  760: test $ac_cv_lib_avcall___builtin_avcall = no && AC_DEFINE(HAS_OLDCALL,,[define this if you want to use the old call libraries])
  761: fi
  762: AC_SUBST(LIBFFIFLAG)
  763: AC_SUBST(FFCALLFLAG)
  764: AC_SUBST(OLDCALLFLAG)
  765: if test "$host_os" != "nextstep3"
  766: then
  767: 	AC_FUNC_MEMCMP
  768: fi
  769: AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal atanh)
  770: AC_FUNC_FSEEKO
  771: AC_CHECK_FUNCS(ftello dlopen sys_siglist getrusage)
  772: AC_CHECK_TYPES(stack_t,,,[#include <signal.h>])
  773: AC_DECL_SYS_SIGLIST
  774: AC_CHECK_FUNC(getopt_long,[true],[AC_LIBOBJ(getopt) AC_LIBOBJ(getopt1)])
  775: AC_CHECK_FUNCS(expm1 log1p)
  776: AC_REPLACE_FUNCS(rint ecvt)
  777: dnl No check for select, because our replacement is no good under
  778: dnl anything but DOS
  779: AC_CHECK_HEADERS(sys/mman.h fnmatch.h)
  780: AC_FUNC_FNMATCH
  781: test $ac_cv_func_fnmatch_works = yes || AC_LIBOBJ(fnmatch)
  782: AC_CHECK_FUNCS(mmap sysconf getpagesize)
  783: AM_PATH_LISPDIR
  784: 
  785: kernel_fi=kernl${vwordsize}${bytesex}.fi
  786: include_fi=kernl${wordsize}${bytesex}${EC}.fi
  787: AC_SUBST(kernel_fi)
  788: AC_SUBST(include_fi)
  789: 
  790: #this breaks bindists
  791: #dnl replace srource directory by absolute value
  792: #if test $srcdir = "."; then srcdir=`pwd` 
  793: #fi
  794: 
  795: AC_SUBST(machine)
  796: AC_CONFIG_FILES([
  797: Makefile
  798: Makedist
  799: gforthmi
  800: vmgen
  801: machpc.fs
  802: envos.fs
  803: engine/Makefile
  804: doc/version.texi
  805: build-ec ])
  806: AC_CONFIG_COMMANDS([stamp-h],[[echo timestamp > stamp-h
  807: chmod +x gforthmi
  808: chmod +x vmgen
  809: chmod +x build-ec
  810: test -d kernel||mkdir kernel]],[[]])
  811: AC_OUTPUT
  812: 

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