File:  [gforth] / gforth / configure.in
Revision 1.204: download - view: text, annotated - select for diffs
Fri Jan 4 21:48:53 2008 UTC (11 years, 10 months ago) by anton
Branches: MAIN
CVS tags: HEAD
moved --enable-force-ll out of configuration and into Makefile:
  Build with "make OPT=-ll OPTDEFINES=-DFORCE_LL"
  This builds gforth-ll gforth-fast-ll etc.
  This is the first step in automatically building a fast gforth.

    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-cdiv,
   46: 	AC_HELP_STRING([--enable-force-cdiv],
   47: 		       [  Use the native C division - symmetric - instead of
   48: 		          floored division (default disabled).]),
   49: 	,enable_force_cdiv=no)
   50: test "$enable_force_cdiv" = "no"||
   51:   AC_DEFINE(FORCE_CDIV,,[Define if you want to use explicit symmetric division for better performance])
   52: 
   53: AC_SUBST(PROFEXES)
   54: AC_SUBST(PROFOBJS)
   55: AC_ARG_ENABLE(prof,
   56: 	AC_HELP_STRING([--enable-prof],
   57: 			[ Build gforth-prof, which outputs frequently occuring
   58:                           sequences of primitives.]),
   59: 	,enable_prof=no)
   60: if test "$enable_prof" != "no"; then
   61:   PROFEXES='gforth-prof$(OPT)$(EXE)'; PROFOBJS='engine-prof$(OPT).o main-prof$(OPT).o profile$(OPT).o'
   62: fi
   63: 
   64: AC_ARG_WITH(debug,
   65: [  --with-debug		  specifies option -g to compile with debug info
   66:   --without-debug	  omits the -g switch and creates smaller images on
   67: 			  machines where "strip" has problems with gcc style
   68: 			  debugging informations.],
   69: if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
   70: 
   71: GCC_LD="\$(GCC)"
   72: EC_MODE="false"
   73: EC=""
   74: engine2='engine2$(OPT).o'
   75: engine_fast2='engine-fast2$(OPT).o'
   76: no_dynamic=""
   77: image_i=""
   78: signals_o="io.o signals.o"
   79: 
   80: AC_ARG_WITH(ec,
   81: 	AC_HELP_STRING([--with-ec=<arch>],
   82: 			[  Build gforth for systems without OS.]),
   83: [if test "$withval" = "no"; then
   84:   echo "defining hosted system"
   85: else
   86:   echo "defining standalone system (${withval})"
   87:   AC_DEFINE(STANDALONE,,[Define if you want a Gforth without OS])
   88:   EC_MODE="true"
   89:   EC="-ec"
   90:   engine2=""
   91:   engine_fast2=""
   92:   no_dynamic="-DNO_DYNAMIC"
   93:   image_i="image.i"
   94:   if test "$withval" != "yes"; then
   95:     signals_o="io-${withval}.o"
   96:   else
   97:     signals_o="io.o"
   98:   fi
   99:   GCC_PATH=$(which $CC)
  100:   LIB_PATH=${GCC_PATH%/*/*}
  101:   GCC_LD="\$(LD)"
  102:   platform=${withval}
  103: fi])
  104: 
  105: #variables mentioned in INSTALL
  106: AC_ARG_VAR(CC, [The C compiler (must support GNU C 2.x).])
  107: AC_ARG_VAR(FORTHSIZES, [Gforth command line options for the default stack and dictionary sizes (see INSTALL).])
  108: AC_ARG_VAR(STACK_CACHE_REGS, [number of registers in the maximum stack cache state for gforth-fast and gforth-native (default platform-dependent).])
  109: AC_ARG_VAR(STACK_CACHE_DEFAULT_FAST, [number of registers in the default stack cache state for gforth-fast and gforth-native (default 1).])
  110: 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)])
  111: 
  112: AC_ARG_VAR(ac_cv_sizeof_char_p, [sizeof(char *)])
  113: AC_ARG_VAR(ac_cv_sizeof_void_p, [sizeof(void *)])
  114: AC_ARG_VAR(ac_cv_sizeof_char, [sizeof(char)])
  115: AC_ARG_VAR(ac_cv_sizeof_short, [sizeof(short)])
  116: AC_ARG_VAR(ac_cv_sizeof_int, [sizeof(int)])
  117: AC_ARG_VAR(ac_cv_sizeof_long, [sizeof(long)])
  118: AC_ARG_VAR(ac_cv_sizeof_long_long, [sizeof(long long)])
  119: AC_ARG_VAR(ac_cv_sizeof_intptr_t, [sizeof(intptr_t)])
  120: AC_ARG_VAR(ac_cv_c_bigendian, [Is the target big-endian ("yes" or "no")?])
  121: AC_ARG_VAR(no_dynamic_default, [run gforth with --dynamic (0) or --no-dynamic (1) by default])
  122: AC_ARG_VAR(condbranch_opt, [enable (1) or disable (0) using two dispatches for conditional branches])
  123: AC_ARG_VAR(skipcode, [assembly code for skipping 16 bytes of code])
  124: AC_ARG_VAR(asmcomment, [assembler comment start string])
  125: AC_ARG_VAR(arm_cacheflush, [file containing ARM cacheflush function (without .c)])
  126: 
  127: #set up feature test macros, so the tests get them right:
  128: # turn on all POSIX, SUSv3, and GNU features if available
  129: AC_GNU_SOURCE
  130: dnl AC_DEFINE_UNQUOTED([_GNU_SOURCE],1,[feature test macro])
  131: 
  132: dnl Don't define _POSIX_SOURCE etc. because some OSs (in particular
  133: dnl MacOSX) disable some features then (MacOSX checks for _POSIX_SOURCE,
  134: dnl but not for _XOPEN_SOURCE)
  135: dnl AC_DEFINE_UNQUOTED([_POSIX_SOURCE],1,[feature test macro])
  136: dnl AC_DEFINE_UNQUOTED([_POSIX_C_SOURCE],199506L,[feature test macro])
  137: dnl AC_DEFINE_UNQUOTED([_XOPEN_SOURCE],600,[feature test macro])
  138: # turn on large file support with 64-bit off_t where available
  139: AC_SYS_LARGEFILE
  140: dnl AC_DEFINE_UNQUOTED([_LARGEFILE_SOURCE],1,[feature test macro])
  141: dnl AC_DEFINE_UNQUOTED([_FILE_OFFSET_BITS],64,[feature test macro])
  142: 
  143: #currently we force direct threading this way.  Eventually we should
  144: #setup in the arch and engine files right
  145: 
  146: AC_PROG_CC
  147: 
  148: test "$GCC" = "yes" || AC_MSG_ERROR(Gforth uses GNU C extensions and requires GCC 2.0 or higher)
  149: 
  150: AC_MSG_CHECKING([whether to use two dispatches per conditional branch])
  151: test x$condbranch_opt = x && 
  152: if ($CC -v 2>&1 |grep -q 'gcc version 3'); then
  153:    condbranch_opt=0
  154: else
  155:    condbranch_opt=1
  156: fi
  157: AC_MSG_RESULT($condbranch_opt)
  158: AC_SUBST(condbranch_opt)
  159: 
  160: AC_SUBST(CC)
  161: AC_SUBST(GCC_LD)
  162: AC_SUBST(DEBUGFLAG)
  163: AC_SUBST(EC)
  164: AC_SUBST(EC_MODE)
  165: AC_SUBST(engine2)
  166: AC_SUBST(engine_fast2)
  167: AC_SUBST(no_dynamic)
  168: AC_SUBST(image_i)
  169: AC_SUBST(signals_o)
  170: 
  171: #this is used to disable some (not generally essential) part of the
  172: #Makefile that some makes don't grok.  It would be better to test for
  173: #this specific Makefile feature than the make version.
  174: AC_MSG_CHECKING(make type)
  175: make_type=`make -n -v 2>&1|grep 'ake'|sed 's/ake .*/ake/'`
  176: GNUMAKE='#'
  177: test "$make_type" = "GNU Make" && GNUMAKE=''
  178: AC_MSG_RESULT($make_type)
  179: AC_SUBST(GNUMAKE)
  180: 
  181: AC_MSG_CHECKING([whether the linker accepts -export-dynamic])
  182: OLDLDFLAGS=$LDFLAGS
  183: LDFLAGS="$LDFLAGS -export-dynamic"
  184: dnl AC_TRY_LINK gives false positive on rs6000-ibm-aix4.2.1.0
  185: dnl AC_TRY_LINK(,,ac_export_dynamic=yes,ac_export_dynamic=no)
  186: AC_TRY_RUN(main(){exit(0);},ac_export_dynamic=yes,ac_export_dynamic=no,ac_export_dynamic=no)
  187: test $ac_export_dynamic = yes|| LDFLAGS=$OLDLDFLAGS
  188: AC_MSG_RESULT($ac_export_dynamic)
  189: 
  190: #terminology is a bit unusual here: The host is the system on which
  191: #gforth will run; the system on which configure will run is the `build'
  192: AC_CANONICAL_HOST
  193: case "$host_cpu" in
  194: 	arm*)
  195: 		machine=arm
  196: 		CFLAGS="$CFLAGS -fomit-frame-pointer"
  197: 		if test x$platform = xnxt; then
  198: 		   CFLAGS="$CFLAGS -mthumb -mthumb-interwork"
  199: 		fi
  200: 		if test -z $arm_cacheflush; then
  201: 		    no_dynamic_default=1
  202:                     arm_cacheflush=arch/arm/cacheflush0
  203: 		    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
  204: 		fi
  205:                 AC_LIBSOURCES([../arch/arm/cacheflush0, ../arch/arm/cacheflush1, ../arch/arm/cacheflush2])
  206:                 AC_LIBOBJ(../$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_intptr_t)
  479:     ac_cv_int_type_double_cell="intptr_t"
  480:     ;;
  481:   $ac_cv_sizeof_intptr_t)
  482:     ac_cv_int_type_double_cell="int128_t"
  483:     ;;
  484: esac
  485: AC_MSG_RESULT($ac_cv_int_type_double_cell)
  486: 
  487: AC_MSG_CHECKING([for a C type for unsigned double-cells])
  488: ac_cv_int_type_double_ucell=none
  489: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
  490:   $ac_cv_sizeof_short)
  491:     ac_cv_int_type_double_ucell="unsigned short"
  492:     ;;
  493:   $ac_cv_sizeof_int)
  494:     ac_cv_int_type_double_ucell="unsigned int"
  495:     ;;
  496:   $ac_cv_sizeof_long)
  497:     ac_cv_int_type_double_ucell="unsigned long"
  498:     ;;
  499:   $ac_cv_sizeof_long_long)
  500:     ac_cv_int_type_double_ucell="unsigned long long"
  501:     ;;
  502:   $ac_cv_sizeof_intptr_t)
  503:     ac_cv_int_type_double_ucell="unsigned intptr_t"
  504:     ;;
  505:   $ac_cv_sizeof_uint128_t)
  506:     ac_cv_int_type_double_ucell="uint128_t"
  507:     ;;
  508: esac
  509: AC_MSG_RESULT($ac_cv_int_type_double_ucell)
  510: 
  511: if test "$ac_cv_int_type_double_cell" != none && \
  512:    test "$ac_cv_int_type_double_ucell" != none
  513: then
  514: 	AC_DEFINE_UNQUOTED(DOUBLE_CELL_TYPE,$ac_cv_int_type_double_cell,[an integer type that is twice as long as a pointer])
  515: 	AC_DEFINE_UNQUOTED(DOUBLE_UCELL_TYPE,$ac_cv_int_type_double_ucell,[an unsigned integer type that is twice as long as a pointer])
  516: fi
  517: 
  518: AC_TYPE_OFF_T
  519: AC_CHECK_SIZEOF(off_t)
  520: test $ac_cv_sizeof_off_t -gt $ac_cv_sizeof_char_p
  521: ac_small_off_t=$?
  522: AC_DEFINE_UNQUOTED(SMALL_OFF_T,$ac_small_off_t,[1 if off_t fits in a Cell])
  523: 
  524: ENGINE_FLAGS=
  525: AC_SUBST(ENGINE_FLAGS)
  526: 
  527: # Try if GCC understands -fno-gcse
  528: 
  529: AC_MSG_CHECKING([if $CC understands -fno-gcse])
  530: CFLAGS_1="$CFLAGS"
  531: CFLAGS="$CFLAGS -fno-gcse"
  532: AC_TRY_COMPILE(,,ac_nogcse=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-gcse",ac_nogcse=no)
  533: CFLAGS="$CFLAGS_1"
  534: AC_MSG_RESULT($ac_nogcse)
  535: 
  536: # Try if GCC understands -fno-strict-aliasing
  537: AC_MSG_CHECKING([if $CC understands -fno-strict-aliasing])
  538: CFLAGS_1="$CFLAGS"
  539: CFLAGS="$CFLAGS -fno-strict-aliasing"
  540: AC_TRY_COMPILE(,,ac_nostrictaliasing=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-strict-aliasing",ac_nostrictaliasing=no)
  541: CFLAGS="$CFLAGS_1"
  542: AC_MSG_RESULT($ac_nostrictaliasing)
  543: 
  544: # Try if GCC understands -fno-crossjumping
  545: AC_MSG_CHECKING([if $CC understands -fno-crossjumping])
  546: CFLAGS_1="$CFLAGS"
  547: CFLAGS="$CFLAGS -fno-crossjumping"
  548: AC_TRY_COMPILE(,,ac_nocrossjumping=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-crossjumping",ac_nocrossjumping=no)
  549: CFLAGS="$CFLAGS_1"
  550: AC_MSG_RESULT($ac_nocrossjumping)
  551: 
  552: # Try if GCC understands -fno-reorder-blocks
  553: AC_MSG_CHECKING([if $CC understands -fno-reorder-blocks])
  554: CFLAGS_1="$CFLAGS"
  555: CFLAGS="$CFLAGS -fno-reorder-blocks"
  556: AC_TRY_COMPILE(,,ac_noreorder_blocks=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-reorder-blocks",ac_noreorder_blocks=no)
  557: CFLAGS="$CFLAGS_1"
  558: AC_MSG_RESULT($ac_noreorder_blocks)
  559: 
  560: # Try if GCC understands -falign-labels=1
  561: AC_MSG_CHECKING([if $CC understands -falign-labels=1])
  562: CFLAGS_1="$CFLAGS"
  563: CFLAGS="$CFLAGS -falign-labels=1"
  564: AC_TRY_COMPILE(,,ac_align_labels=yes;ENGINE_FLAGS="$ENGINE_FLAGS -falign-labels=1",ac_align_labels=no)
  565: CFLAGS="$CFLAGS_1"
  566: AC_MSG_RESULT($ac_align_labels)
  567: 
  568: # Try if GCC understands -falign-loops=1
  569: AC_MSG_CHECKING([if $CC understands -falign-loops=1])
  570: CFLAGS_1="$CFLAGS"
  571: CFLAGS="$CFLAGS -falign-loops=1"
  572: AC_TRY_COMPILE(,,ac_align_loops=yes;ENGINE_FLAGS="$ENGINE_FLAGS -falign-loops=1",ac_align_loops=no)
  573: CFLAGS="$CFLAGS_1"
  574: AC_MSG_RESULT($ac_align_loops)
  575: 
  576: # Try if GCC understands -falign-jumps=1
  577: AC_MSG_CHECKING([if $CC understands -falign-jumps=1])
  578: CFLAGS_1="$CFLAGS"
  579: CFLAGS="$CFLAGS -falign-jumps=1"
  580: AC_TRY_COMPILE(,,ac_align_jumps=yes;ENGINE_FLAGS="$ENGINE_FLAGS -falign-jumps=1",ac_align_jumps=no)
  581: CFLAGS="$CFLAGS_1"
  582: AC_MSG_RESULT($ac_align_jumps)
  583: 
  584: # Try if GCC understands __attribute__((unused))
  585: AC_MSG_CHECKING([how to suppress 'unused variable' warnings])
  586: AC_TRY_COMPILE(,[int __attribute__((unused)) foo;], MAYBE_UNUSED='__attribute__((unused))',)
  587: AC_DEFINE_UNQUOTED(MAYBE_UNUSED,$MAYBE_UNUSED,[attribute for possibly unused variables])
  588: AC_MSG_RESULT($MAYBE_UNUSED)
  589: 
  590: #try if m4 understands -s
  591: AC_MSG_CHECKING([how to invoke m4])
  592: if m4 -s /dev/null >/dev/null 2>&1; then
  593:  M4="m4 -s"
  594: else
  595:  M4=m4
  596: fi
  597: AC_SUBST(M4)
  598: AC_DEFINE_UNQUOTED(M4,"$M4",[How to invoke m4])
  599: AC_MSG_RESULT($M4)
  600: 
  601: # Find installed Gforth
  602: AC_MSG_CHECKING([for gforth])
  603: GFORTH="`which gforth 2>/dev/null`"
  604: if test ! -z "$GFORTH"; then  GFORTH="$GFORTH -m4M" ; fi
  605: AC_SUBST(GFORTH)
  606: AC_DEFINE_UNQUOTED(GFORTH,"$GFORTH",[How to invoke gforth])
  607: AC_MSG_RESULT($GFORTH)
  608: 
  609: echo "machine='$machine'"
  610: 
  611: dnl AC_CHECK_PROG(asm_fs,asm.fs,arch/$machine/asm.fs,,$srcdir/arch/$machine)
  612: AC_CHECK_FILE($srcdir/arch/$machine/asm.fs,[asm_fs=arch/$machine/asm.fs],)
  613: AC_SUBST(asm_fs)
  614: 
  615: dnl AC_CHECK_PROG(disasm_fs,disasm.fs,arch/$machine/disasm.fs,,$srcdir/arch/$machine)
  616: AC_CHECK_FILE($srcdir/arch/$machine/disasm.fs,[disasm_fs=arch/$machine/disasm.fs],)
  617: AC_SUBST(disasm_fs)
  618: 
  619: AC_PATH_PROG(INSTALL_INFO,install-info,[echo '>>>>Please make info dir entry:'],$PATH:/sbin:/usr/sbin:/usr/local/sbin)
  620: 
  621: case "$host_os" in
  622: 	*win32*)
  623: 		# !!!FIXME!!! problems with cygwin and ';' as path separator
  624: 		DIRSEP="\\\\"
  625: 		PATHSEP=";"
  626: 		#we want the builtins of command.com/cmd.exe and its
  627: 		# handling of .com files.
  628: 		#$COMSPEC contains the name of the Windows shell;
  629: 		# the ./ is there, because the bash does not recognize
  630: 		# absolute DOS filenames
  631: 		DEFAULTSYSTEMPREFIX="./$COMSPEC /c "
  632: 		;;
  633: 	*darwin*)
  634: 		#Darwin uses some funny preprocessor by default; eliminate it:
  635: 		AC_MSG_NOTICE([using -no-cpp-precomp on Darwin])
  636: 		CFLAGS="$CFLAGS -no-cpp-precomp"
  637: 		DIRSEP="/"
  638: 		PATHSEP=":"
  639: 		DEFAULTSYSTEMPREFIX=""
  640: 		;;
  641: 	*)
  642: 		DIRSEP="/"
  643: 		PATHSEP=":"
  644: 		DEFAULTSYSTEMPREFIX=""
  645: 		;;
  646: esac
  647: AC_SUBST(DIRSEP)
  648: AC_DEFINE_UNQUOTED(DIRSEP,'$DIRSEP',[a directory separator character])
  649: AC_SUBST(PATHSEP)
  650: AC_DEFINE_UNQUOTED(PATHSEP,'$PATHSEP',[a path separator character])
  651: AC_SUBST(DEFAULTSYSTEMPREFIX)
  652: AC_DEFINE_UNQUOTED(DEFAULTSYSTEMPREFIX,"$DEFAULTSYSTEMPREFIX",[default for environment variable GFORTHSYSTEMPREFIX])
  653: 
  654: #work around SELinux brain damage (from Andrew Haley <12t8f3jakb74g2c@news.supernews.com>)
  655: #This magic incantation  seems to be completely undocumented.
  656: AC_CHECK_PROG([MASSAGE_EXE],[chcon],[chcon -t unconfined_execmem_exec_t],[true])
  657: 
  658: dnl Now a little support for DOS/DJGCC
  659: AC_SUBST(GFORTH_EXE)
  660: GFORTH_EXE=""
  661: AC_SUBST(GFORTHFAST_EXE)
  662: GFORTHFAST_EXE=""
  663: AC_SUBST(GFORTHITC_EXE)
  664: GFORTHITC_EXE=""
  665: AC_SUBST(GFORTHDITC_EXE)
  666: GFORTHDITC_EXE=""
  667: 
  668: AC_SUBST(FORTHSIZES)
  669: 
  670: dnl if test "$PEEPHOLE" = "yes"
  671: dnl then
  672: dnl    PEEPHOLEFLAG="true"
  673: dnl    AC_DEFINE(HAS_PEEPHOLE,,[Define if you want to use peephole optimization])
  674: dnl else
  675: dnl    PEEPHOLEFLAG="false"
  676: dnl fi
  677: PEEPHOLEFLAG="true"
  678: AC_SUBST(PEEPHOLEFLAG)
  679: 
  680: dnl copy commands for systems that don't have links
  681: AC_SUBST(LINK_KERNL)
  682: LINK_KERNL=""
  683: 
  684: #if test $host_os=dos
  685: #then
  686: #  echo Configuring for DOS!!!
  687: #  MAKE_EXE="coff2exe gforth"
  688: #  LINK_KERNL='$(CP) kernl32l.fi kernel.fi'
  689: #fi
  690: 
  691: dnl the following macro produces a warning with autoconf-2.1
  692: AC_C_BIGENDIAN
  693: AC_SUBST(KERNEL)
  694: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
  695: if test $ac_cv_c_bigendian = yes; then
  696:   bytesex=b
  697:   KERNEL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
  698: else
  699:   bytesex=l
  700:   KERNEL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
  701: fi
  702: 
  703: #check how to do asm(".skip 16")
  704: #echo "CFLAGS=$CFLAGS"
  705: #echo "ac_link=$ac_link"
  706: AC_MSG_CHECKING([if and how we can waste code space])
  707: if test -z "$skipcode"; then
  708:     skipcode=no
  709:     CFLAGS_1="$CFLAGS"
  710:     CFLAGS="$CFLAGS $ENGINE_FLAGS"
  711:     for i in ".skip 16" ".block 16" ".org .+16" ".=.+16" ".space 16"
  712:     do
  713: 	AC_TRY_RUN(
  714: [int foo(int,int,int);
  715: main()
  716: {
  717:   exit(foo(0,0,0)!=16);
  718: }
  719: int foo(int x, int y, int z)
  720: {
  721:   static void *labels[]={&&label1, &&label2};
  722:   if (x) {
  723:     y++; /* workaround for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12108 */
  724:   label1:
  725:     asm("$i"); /* or ".space 16" or somesuch */
  726:   label2: ;
  727:   }
  728:   {
  729:   if (y) goto *labels[z]; /* workaround for gcc PR12108 */
  730:   return labels[1]-labels[0];
  731:   }
  732: }]
  733: 	,skipcode=$i; break
  734: 	,,)
  735:     done
  736:     CFLAGS=$CFLAGS_1
  737: fi
  738: AC_MSG_RESULT($skipcode)
  739: if test "$skipcode" = no
  740: then 
  741:     if test -z $no_dynamic_default; then
  742: 	no_dynamic_default=1
  743: 	AC_MSG_WARN(Disabling default dynamic native code generation)
  744:     fi
  745:     AC_DEFINE_UNQUOTED(SKIP16,((void)0),statement for skipping 16 bytes)
  746: else
  747:     AC_DEFINE_UNQUOTED(SKIP16,asm("$skipcode"),statement for skipping 16 bytes)
  748: fi
  749: 
  750: AC_MSG_CHECKING([if and how we can do comments in asm statements])
  751: #the point here is to get asm statements that look different to
  752: #gcc's "optimizer"
  753: if test -z "$asmcomment"; then
  754:     asmcomment=no
  755:     CFLAGS_1="$CFLAGS"
  756:     CFLAGS="$CFLAGS $ENGINE_FLAGS"
  757:     for i in '"# "' '"! "' '"; "'; do
  758: 	AC_TRY_COMPILE(,[asm($i"fluffystunk");],asmcomment=$i; break,)
  759:     done
  760:     CFLAGS=$CFLAGS_1
  761: fi
  762: AC_MSG_RESULT($asmcomment)
  763: if test "$asmcomment" != no
  764: then 
  765:     AC_DEFINE_UNQUOTED(ASMCOMMENT,$asmcomment,[assembler comment start string])
  766: fi
  767: 
  768: test "$no_dynamic_default" || no_dynamic_default=0
  769: AC_DEFINE_UNQUOTED(NO_DYNAMIC_DEFAULT,$no_dynamic_default,default value for no_dynamic)
  770: 
  771: dnl Checks for programs.
  772: AC_PROG_LN_S
  773: AC_PROG_INSTALL
  774: AC_CHECK_PROGS(TEXI2DVI,texi2dvi4a2ps texi2dvi)
  775: 
  776: dnl MacOS X has a libtool that does something else
  777: AC_CHECK_PROGS(GNU_LIBTOOL,glibtool libtool)
  778: 
  779: dnl Checks for library functions
  780: dnl This check is just for making later checks link with libm.
  781: dnl using sin here is no good idea since it is built-into gcc and typechecked
  782: AC_CHECK_LIB(m,asin)
  783: AC_CHECK_LIB(ltdl,lt_dlinit)
  784: AC_CHECK_LIB(dl,dlopen)
  785: dnl check for libffi 2.x
  786: AC_CHECK_LIB(ffi,ffi_call)
  787: if test $ac_cv_lib_ffi_ffi_call = yes
  788: then
  789: LIBFFIFLAG="true"
  790: FFCALLFLAG="false"
  791: OLDCALLFLAG="false"
  792: AC_DEFINE(HAS_LIBFFI,,[define this if you want to use the ffcall interface with libffi 2.0])
  793: else
  794: dnl check for ffcall libraries
  795: dnl unfortunately, these four calls are separated out into a library each.
  796: AC_CHECK_LIB(avcall,__builtin_avcall)
  797: AC_CHECK_LIB(callback,__vacall_r)
  798: AC_CHECK_LIB(vacall,vacall)
  799: AC_CHECK_LIB(trampoline,alloc_trampoline)
  800: LIBFFIFLAG="false"
  801: FFCALLFLAG="false"
  802: OLDCALLFLAG="true"
  803: 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])
  804: test $ac_cv_lib_avcall___builtin_avcall = no && AC_DEFINE(HAS_OLDCALL,,[define this if you want to use the old call libraries])
  805: fi
  806: AC_SUBST(LIBFFIFLAG)
  807: AC_SUBST(FFCALLFLAG)
  808: AC_SUBST(OLDCALLFLAG)
  809: if test "$host_os" != "nextstep3"
  810: then
  811: 	AC_FUNC_MEMCMP
  812: fi
  813: AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal atanh)
  814: AC_FUNC_FSEEKO
  815: AC_CHECK_FUNCS(ftello dlopen sys_siglist getrusage nanosleep)
  816: AC_CHECK_TYPES(stack_t,,,[#include <signal.h>])
  817: AC_DECL_SYS_SIGLIST
  818: AC_CHECK_FUNC(getopt_long,[true],[AC_LIBOBJ(getopt) AC_LIBOBJ(getopt1)])
  819: AC_CHECK_FUNCS(expm1 log1p)
  820: AC_REPLACE_FUNCS(rint ecvt)
  821: dnl No check for select, because our replacement is no good under
  822: dnl anything but DOS
  823: AC_CHECK_HEADERS(sys/mman.h fnmatch.h)
  824: AC_FUNC_FNMATCH
  825: test $ac_cv_func_fnmatch_works = yes || AC_LIBOBJ(fnmatch)
  826: AC_CHECK_FUNCS(mmap sysconf getpagesize)
  827: AM_PATH_LISPDIR
  828: 
  829: kernel_fi=kernl${vwordsize}${bytesex}.fi
  830: include_fi=kernl${wordsize}${bytesex}${EC}.fi
  831: AC_SUBST(kernel_fi)
  832: AC_SUBST(include_fi)
  833: 
  834: #this breaks bindists
  835: #dnl replace srource directory by absolute value
  836: #if test $srcdir = "."; then srcdir=`pwd` 
  837: #fi
  838: 
  839: AC_SUBST(machine)
  840: AC_CONFIG_FILES([
  841: Makefile
  842: Makedist
  843: gforthmi
  844: vmgen
  845: machpc.fs
  846: envos.fs
  847: engine/Makefile
  848: engine/libcc.h
  849: doc/version.texi
  850: build-ec ])
  851: AC_CONFIG_COMMANDS([stamp-h],[[echo timestamp > stamp-h
  852: chmod +x gforthmi
  853: chmod +x vmgen
  854: chmod +x build-ec
  855: test -d kernel||mkdir kernel
  856: $srcdir/mkinstalldirs include/gforth/$PACKAGE_VERSION
  857: ln -sf ../../../engine/config.h ../../../engine/libcc.h include/gforth/$PACKAGE_VERSION]],[[PACKAGE_VERSION=$PACKAGE_VERSION]])
  858: AC_OUTPUT
  859: 

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