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Check for Linux on ARM by comparing $host_os against "*linux*" and not just
"linux".  In practice we can see values like "linux-gnu", "linux-uclibc".
This also mirrors the other places in configure.in wher $host_os is
referenced.

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