File:  [gforth] / gforth / configure.in
Revision 1.167: download - view: text, annotated - select for diffs
Sun Jan 21 17:29:53 2007 UTC (12 years, 9 months ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Started with Gforth EC NXT

    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],[0.6.2-20060527],[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 "$enable_force_ll" = "no"||
   54:   AC_DEFINE(FORCE_LL,,[Define if you want to use explicit long long declarations for better performance (does not work with all GCC versions on all machines)])
   55: 
   56: AC_ARG_ENABLE(gcc-pr15242-workaround,
   57:               AC_HELP_STRING([--disable-gcc-pr15242-workaround],[Disables
   58:                              dynamic code generation on some versions of gcc
   59:                              (slowdown~2 on Athlon) and causes slower building
   60:                              of gforth (but gforth speedups) on others.
   61:                              (default enabled)]),
   62: 		,enable_gcc_pr15242_workaround=yes)
   63: test "$enable_gcc_pr15242_workaround" = "no"||
   64: AC_DEFINE(GCC_PR15242_WORKAROUND,,[Define if you want to get dynamic code
   65: generation on gccs affected by PR15242])
   66: 
   67: AC_ARG_ENABLE(force-cdiv,
   68: 	AC_HELP_STRING([--enable-force-cdiv],
   69: 		       [  Use the native C division - symmetric - instead of
   70: 		          floored division (default disabled).]),
   71: 	,enable_force_cdiv=no)
   72: test "$enable_force_cdiv" = "no"||
   73:   AC_DEFINE(FORCE_CDIV,,[Define if you want to use explicit symmetric division for better performance])
   74: 
   75: AC_SUBST(PROFEXES)
   76: AC_SUBST(PROFOBJS)
   77: AC_ARG_ENABLE(prof,
   78: 	AC_HELP_STRING([--enable-prof],
   79: 			[ Build gforth-prof, which outputs frequently occuring
   80:                           sequences of primitives.]),
   81: 	,enable_prof=no)
   82: if test "$enable_prof" = "no"; then
   83:   PROFEXES="gforth-prof\$(EXE)"; PROFOBJS="engine-prof.o main-prof.o profile.o"
   84: fi
   85: 
   86: AC_ARG_WITH(debug,
   87: [  --with-debug		  specifies option -g to compile with debug info
   88:   --without-debug	  omits the -g switch and creates smaller images on
   89: 			  machines where "strip" has problems with gcc style
   90: 			  debugging informations.],
   91: if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
   92: 
   93: dnl PEEPHOLE="yes"
   94: dnl AC_ARG_WITH(peephole,
   95: dnl [  --with-peephole	Enable peephole optimization (default)
   96: dnl   --without-peephole	disables peephole optimization. Creates smaller,
   97: dnl 			but slower images.],
   98: dnl PEEPHOLE="$withval")
   99: 
  100: AC_ARG_ENABLE(ec,
  101: 	AC_HELP_STRING([--enable-ec],
  102: 			[ Build gforth for systems without OS.]),
  103: 	,enable_ec=no)
  104: if test "$enable_ec" = "yes"; then
  105:   AC_DEFINE(HAVE_EC,,[Define if you want a Gforth without OS])
  106:   EC_MODE="true"
  107: else
  108:   EC_MODE="false"
  109: fi
  110: 
  111: #variables mentioned in INSTALL
  112: AC_ARG_VAR(CC, [The C compiler (must support GNU C 2.x); gcc-2.95 recommended.])
  113: AC_ARG_VAR(FORTHSIZES, [Gforth command line options for the default stack and dictionary sizes (see INSTALL).])
  114: AC_ARG_VAR(STACK_CACHE_DEFAULT_FAST, [number of registers in the default stack cache state for gforth-fast and gforth-native (default 1).])
  115: AC_ARG_VAR(ac_cv_sizeof_char_p, [sizeof(char *)])
  116: AC_ARG_VAR(ac_cv_sizeof_char, [sizeof(char)])
  117: AC_ARG_VAR(ac_cv_sizeof_short, [sizeof(short)])
  118: AC_ARG_VAR(ac_cv_sizeof_int, [sizeof(int)])
  119: AC_ARG_VAR(ac_cv_sizeof_long, [sizeof(long)])
  120: AC_ARG_VAR(ac_cv_sizeof_long_long, [sizeof(long long)])
  121: AC_ARG_VAR(ac_cv_sizeof_intptr_t, [sizeof(intptr_t)])
  122: AC_ARG_VAR(ac_cv_sizeof_int128_t, [sizeof(int128_t)])
  123: AC_ARG_VAR(ac_cv_sizeof_uint128_t, [sizeof(uint128_t)])
  124: AC_ARG_VAR(ac_cv_c_bigendian, [Is the target big-endian ("yes" or "no")?])
  125: AC_ARG_VAR(no_dynamic_default, [run gforth with --dynamic (0) or --no-dynamic (1) by default])
  126: AC_ARG_VAR(skipcode, [assembly code for skipping 16 bytes of code])
  127: 
  128: #set up feature test macros, so the tests get them right:
  129: # turn on all POSIX, SUSv3, and GNU features if available
  130: AC_GNU_SOURCE
  131: dnl AC_DEFINE_UNQUOTED([_GNU_SOURCE],1,[feature test macro])
  132: 
  133: dnl Don't define _POSIX_SOURCE etc. because some OSs (in particular
  134: dnl MacOSX) disable some features then (MacOSX checks for _POSIX_SOURCE,
  135: dnl but not for _XOPEN_SOURCE)
  136: dnl AC_DEFINE_UNQUOTED([_POSIX_SOURCE],1,[feature test macro])
  137: dnl AC_DEFINE_UNQUOTED([_POSIX_C_SOURCE],199506L,[feature test macro])
  138: dnl AC_DEFINE_UNQUOTED([_XOPEN_SOURCE],600,[feature test macro])
  139: # turn on large file support with 64-bit off_t where available
  140: AC_SYS_LARGEFILE
  141: dnl AC_DEFINE_UNQUOTED([_LARGEFILE_SOURCE],1,[feature test macro])
  142: dnl AC_DEFINE_UNQUOTED([_FILE_OFFSET_BITS],64,[feature test macro])
  143: 
  144: #currently we force direct threading this way.  Eventually we should
  145: #setup in the arch and engine files right
  146: 
  147: AC_PROG_CC
  148: 
  149: test "$GCC" = "yes" || AC_MSG_ERROR(Gforth uses GNU C extensions and requires GCC 2.0 or higher)
  150: 
  151: AC_SUBST(CC)
  152: AC_SUBST(DEBUGFLAG)
  153: AC_SUBST(HAVE_EC)
  154: AC_SUBST(EC_MODE)
  155: 
  156: AC_MSG_CHECKING(make type)
  157: make_type=`make -v 2>&1|grep 'ake'|sed 's/ake .*/ake/'`
  158: 
  159: GNUMAKE='#'
  160: test "$make_type" = "GNU Make" && GNUMAKE=''
  161: 
  162: AC_MSG_RESULT($make_type)
  163: 
  164: AC_SUBST(GNUMAKE)
  165: 
  166: AC_MSG_CHECKING([whether the linker accepts -export-dynamic])
  167: OLDLDFLAGS=$LDFLAGS
  168: LDFLAGS="$LDFLAGS -export-dynamic"
  169: dnl AC_TRY_LINK gives false positive on rs6000-ibm-aix4.2.1.0
  170: dnl AC_TRY_LINK(,,ac_export_dynamic=yes,ac_export_dynamic=no)
  171: AC_TRY_RUN(main(){exit(0);},ac_export_dynamic=yes,ac_export_dynamic=no,ac_export_dynamic=no)
  172: test $ac_export_dynamic = yes|| LDFLAGS=$OLDLDFLAGS
  173: AC_MSG_RESULT($ac_export_dynamic)
  174: 
  175: #terminology is a bit unusual here: The host is the system on which
  176: #gforth will run; the system on which configure will run is the `build'
  177: AC_CANONICAL_HOST
  178: case "$host_cpu" in
  179: 	arm*)
  180: 		machine=arm
  181: 		CFLAGS="$CFLAGS -fomit-frame-pointer"
  182: 		if test -z $no_dynamic_default; then
  183: 		    no_dynamic_default=1
  184: 		    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
  185: 		fi
  186: 		;;
  187: 	hppa*)
  188: 		machine=hppa
  189: 		$srcdir/mkinstalldirs arch/hppa
  190: 		AC_LIBOBJ(../arch/hppa/cache)
  191: 		#-N needed for --dynamic <M4U3b.3790$9d.317@news.cpqcorp.net>
  192: 		LDFLAGS="$LDFLAGS -Xlinker -N"
  193: 		LIBS="$LIBS -L/lib/pa1.1/"
  194: 		;;
  195: 	sparc*)
  196: 		machine=sparc
  197: 		;;
  198: 	i386)
  199: 		machine=386
  200: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
  201: 		;;
  202: 	i486)
  203: 		machine=386
  204: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem -m486"
  205: 		;;
  206: 	i*86)
  207: 		machine=386
  208: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
  209: 		CFLAGS_1="$CFLAGS"
  210: 		CFLAGS="$CFLAGS -march=pentium"
  211: 		AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1 -m486")
  212: 		;;
  213: 	x86_64)
  214: 		machine=amd64
  215: 		;;
  216: 	ia64*)
  217: 		machine=ia64
  218: 		AC_LIBOBJ(../arch/ia64/flush_icache_block)
  219: 		test "$skipcode" || skipcode="nop.i 0"
  220: 		#".skip 16" passes the test below,
  221: 		# but gives an assembler error in engine
  222: 		;;
  223:         m68k)
  224: 		machine=m68k
  225: 		CFLAGS="$CFLAGS -fomit-frame-pointer"
  226: 		if test "$host_os" = "nextstep3"
  227: 		then
  228: 			AC_LIBOBJ(termios)
  229: 		fi
  230: 		;;
  231: 	mips*)
  232: 		machine=mips
  233: 		#dynamic native code has the following problems on MIPS:
  234: 		#
  235: 		#1) J/JAL seems relocatable, but is are only
  236: 		#relocatable within a 256MB-segment.  While we try to
  237: 		#get the linker to arrange this, there is no guarantee
  238: 		#that this will succeed (and if the user uses a lot of
  239: 		#memory, it is likely to fail).
  240: 		#
  241: 		#2) The way we generate dynamic native code may
  242: 		#violate MIPS architectural restrictions (in
  243: 		#particular, the delay slots of LW, MFLO, etc.)
  244: 		#
  245: 		#Therefore we disable dynamic native code by default:
  246: 		if test -z $no_dynamic_default; then
  247: 		    no_dynamic_default=1
  248: 		    AC_MSG_WARN([Disabling default dynamic native code generation (relocation and delay slot issues)])
  249: 		fi
  250: 		;;
  251: 	alpha*)
  252: 		machine=alpha
  253: 		#full IEEE FP support for more uniformity across platforms:
  254: 		CFLAGS="$CFLAGS -mieee"
  255: 		;;
  256: 	power*|rs6000)
  257: 		machine=power
  258: 		$srcdir/mkinstalldirs arch/power
  259: 		AC_CHECK_FUNC(_sync_cache_range,[true],[AC_LIBOBJ(../arch/power/_sync_cache_range)])
  260: 		#long long is broken on (at least) gcc-2.95.* for PPC
  261: 		test x$ac_cv_sizeof_long_long = x && 
  262: 		($CC -v 2>&1 |grep -q 'gcc version 2.95') &&
  263: 		ac_cv_sizeof_long_long=0
  264: 		;;
  265: 	*)
  266: 		AC_MSG_WARN([Using a generic machine description])
  267: 		AC_MSG_WARN([Assuming C floats and doubles are IEEE floats and doubles (for SF@ DF@ SF! DF!)])
  268: 		AC_MSG_WARN([FLUSH-ICACHE will do nothing, so END-CODE may not work properly!])
  269: 		machine=generic
  270: 		#I-cache flushing would be needed for dynamic code generation
  271: 		if test -z $no_dynamic_default; then
  272: 		    no_dynamic_default=1
  273: 		    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
  274: 		fi
  275: esac
  276: AC_SUBST(host)
  277: 
  278: test x$STACK_CACHE_DEFAULT_FAST = x && STACK_CACHE_DEFAULT_FAST=1
  279: AC_DEFINE_UNQUOTED(STACK_CACHE_DEFAULT_FAST, $STACK_CACHE_DEFAULT_FAST,
  280: 		   [number of registers in the default stack cache state for gforth-fast and gforth-native])
  281: 
  282: if test "${enable_force_ll+set}" = set; then
  283:    ac_includes_default="$ac_includes_default
  284: #include \"arch/generic/128bit.h\""
  285: fi
  286: 
  287: dnl the following macro produces a warning with autoconf-2.1
  288: AC_CHECK_SIZEOF(char *)
  289: case "$ac_cv_sizeof_char_p" in
  290:   2)
  291:     wordsize=16
  292:     ;;
  293:   4)
  294:     wordsize=32
  295:     ;;
  296:   8)
  297:     wordsize=64
  298:     ;;
  299: esac
  300: 
  301: AC_CHECK_SIZEOF(char)
  302: AC_CHECK_SIZEOF(short)
  303: AC_CHECK_SIZEOF(int)
  304: AC_CHECK_SIZEOF(long)
  305: AC_CHECK_SIZEOF(long long)
  306: AC_CHECK_SIZEOF(intptr_t)
  307: AC_CHECK_SIZEOF(int128_t)
  308: AC_CHECK_SIZEOF(uint128_t)
  309: 
  310: AC_MSG_CHECKING([for a C type for cells])
  311: ac_cv_int_type_cell=none
  312: case "$ac_cv_sizeof_char_p" in
  313:   $ac_cv_sizeof_int)
  314:     ac_cv_int_type_cell=int
  315:     ;;
  316:   $ac_cv_sizeof_short)
  317:     ac_cv_int_type_cell=short
  318:     ;;
  319:   $ac_cv_sizeof_char)
  320:     ac_cv_int_type_cell=char
  321:     ;;
  322:   $ac_cv_sizeof_long)
  323:     ac_cv_int_type_cell=long
  324:     ;;
  325:   $ac_cv_sizeof_long_long)
  326:     ac_cv_int_type_cell="long long"
  327:     ;;
  328:   $ac_cv_sizeof_intptr_t)
  329:     ac_cv_int_type_cell="intptr_t"
  330:     ;;
  331:   $ac_cv_sizeof_int128_t)
  332:     ac_cv_int_type_cell="int128_t"
  333:     ;;
  334: esac
  335: AC_MSG_RESULT($ac_cv_int_type_cell)
  336: AC_DEFINE_UNQUOTED(CELL_TYPE,$ac_cv_int_type_cell,[an integer type that is as long as a pointer])
  337: 
  338: AC_MSG_CHECKING([for a C type for wydes])
  339: ac_cv_wyde_type_cell=none
  340: case 2 in
  341:   $ac_cv_sizeof_int)
  342:     ac_cv_wyde_type_cell=int
  343:     ;;
  344:   $ac_cv_sizeof_short)
  345:     ac_cv_wyde_type_cell=short
  346:     ;;
  347:   $ac_cv_sizeof_char)
  348:     ac_cv_wyde_type_cell=char
  349:     ;;
  350:   $ac_cv_sizeof_long)
  351:     ac_cv_wyde_type_cell=long
  352:     ;;
  353:   $ac_cv_sizeof_long_long)
  354:     ac_cv_wyde_type_cell="long long"
  355:     ;;
  356:   $ac_cv_sizeof_intptr_t)
  357:     ac_cv_wyde_type_cell="intptr_t"
  358:     ;;
  359:   $ac_cv_sizeof_int128_t)
  360:     ac_cv_wyde_type_cell="int128_t"
  361:     ;;
  362: esac
  363: AC_MSG_RESULT($ac_cv_wyde_type_cell)
  364: AC_DEFINE_UNQUOTED(WYDE_TYPE,$ac_cv_wyde_type_cell,[an integer type that is 2 bytes long])
  365: 
  366: AC_MSG_CHECKING([for a C type for tetrabytes])
  367: ac_cv_tetrabyte_type_cell=none
  368: case 4 in
  369:   $ac_cv_sizeof_int)
  370:     ac_cv_tetrabyte_type_cell=int
  371:     ;;
  372:   $ac_cv_sizeof_short)
  373:     ac_cv_tetrabyte_type_cell=short
  374:     ;;
  375:   $ac_cv_sizeof_char)
  376:     ac_cv_tetrabyte_type_cell=char
  377:     ;;
  378:   $ac_cv_sizeof_long)
  379:     ac_cv_tetrabyte_type_cell=long
  380:     ;;
  381:   $ac_cv_sizeof_long_long)
  382:     ac_cv_tetrabyte_type_cell="long long"
  383:     ;;
  384:   $ac_cv_sizeof_intptr_t)
  385:     ac_cv_tetrabyte_type_cell="intptr_t"
  386:     ;;
  387:   $ac_cv_sizeof_int128_t)
  388:     ac_cv_tetrabyte_type_cell="int128_t"
  389:     ;;
  390: esac
  391: AC_MSG_RESULT($ac_cv_tetrabyte_type_cell)
  392: AC_DEFINE_UNQUOTED(TETRABYTE_TYPE,$ac_cv_tetrabyte_type_cell,[an integer type that is 4 bytes long])
  393: 
  394: AC_MSG_CHECKING([for a C type for double-cells])
  395: ac_cv_int_type_double_cell=none
  396: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
  397:   $ac_cv_sizeof_short)
  398:     ac_cv_int_type_double_cell=short
  399:     ;;
  400:   $ac_cv_sizeof_int)
  401:     ac_cv_int_type_double_cell=int
  402:     ;;
  403:   $ac_cv_sizeof_long)
  404:     ac_cv_int_type_double_cell=long
  405:     ;;
  406:   $ac_cv_sizeof_long_long)
  407:     ac_cv_int_type_double_cell="long long"
  408:     ;;
  409:   $ac_cv_sizeof_intptr_t)
  410:     ac_cv_int_type_double_cell="intptr_t"
  411:     ;;
  412:   $ac_cv_sizeof_int128_t)
  413:     ac_cv_int_type_double_cell="int128_t"
  414:     ;;
  415: esac
  416: AC_MSG_RESULT($ac_cv_int_type_double_cell)
  417: 
  418: AC_MSG_CHECKING([for a C type for unsigned double-cells])
  419: ac_cv_int_type_double_ucell=none
  420: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
  421:   $ac_cv_sizeof_short)
  422:     ac_cv_int_type_double_ucell="unsigned short"
  423:     ;;
  424:   $ac_cv_sizeof_int)
  425:     ac_cv_int_type_double_ucell="unsigned int"
  426:     ;;
  427:   $ac_cv_sizeof_long)
  428:     ac_cv_int_type_double_ucell="unsigned long"
  429:     ;;
  430:   $ac_cv_sizeof_long_long)
  431:     ac_cv_int_type_double_ucell="unsigned long long"
  432:     ;;
  433:   $ac_cv_sizeof_intptr_t)
  434:     ac_cv_int_type_double_ucell="unsigned intptr_t"
  435:     ;;
  436:   $ac_cv_sizeof_uint128_t)
  437:     ac_cv_int_type_double_ucell="uint128_t"
  438:     ;;
  439: esac
  440: AC_MSG_RESULT($ac_cv_int_type_double_ucell)
  441: 
  442: if test "$ac_cv_int_type_double_cell" = none || \
  443:    test "$ac_cv_int_type_double_ucell" = none
  444: then
  445: 	AC_MSG_WARN([Emulating double-cell arithmetic. This may be slow.])
  446: 	AC_LIBOBJ(dblsub)
  447: 	AC_DEFINE(BUGGY_LONG_LONG,,[define this if there is no working DOUBLE_CELL_TYPE on your machine])
  448: else
  449: 	AC_DEFINE_UNQUOTED(DOUBLE_CELL_TYPE,$ac_cv_int_type_double_cell,[an integer type that is twice as long as a pointer])
  450: 	AC_DEFINE_UNQUOTED(DOUBLE_UCELL_TYPE,$ac_cv_int_type_double_ucell,[an unsigned integer type that is twice as long as a pointer])
  451: fi
  452: 
  453: AC_TYPE_OFF_T
  454: AC_CHECK_SIZEOF(off_t)
  455: test $ac_cv_sizeof_off_t -gt $ac_cv_sizeof_char_p
  456: ac_small_off_t=$?
  457: AC_DEFINE_UNQUOTED(SMALL_OFF_T,$ac_small_off_t,[1 if off_t fits in a Cell])
  458: 
  459: ENGINE_FLAGS=
  460: AC_SUBST(ENGINE_FLAGS)
  461: 
  462: # Try if GCC understands -fno-gcse
  463: 
  464: AC_MSG_CHECKING([if $CC understands -fno-gcse])
  465: CFLAGS_1="$CFLAGS"
  466: CFLAGS="$CFLAGS -fno-gcse"
  467: AC_TRY_COMPILE(,,ac_nogcse=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-gcse",ac_nogcse=no)
  468: CFLAGS="$CFLAGS_1"
  469: AC_MSG_RESULT($ac_nogcse)
  470: 
  471: # Try if GCC understands -fno-strict-aliasing
  472: AC_MSG_CHECKING([if $CC understands -fno-strict-aliasing])
  473: CFLAGS_1="$CFLAGS"
  474: CFLAGS="$CFLAGS -fno-strict-aliasing"
  475: AC_TRY_COMPILE(,,ac_nostrictaliasing=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-strict-aliasing",ac_nostrictaliasing=no)
  476: CFLAGS="$CFLAGS_1"
  477: AC_MSG_RESULT($ac_nostrictaliasing)
  478: 
  479: # Try if GCC understands -fno-crossjumping
  480: AC_MSG_CHECKING([if $CC understands -fno-crossjumping])
  481: CFLAGS_1="$CFLAGS"
  482: CFLAGS="$CFLAGS -fno-crossjumping"
  483: AC_TRY_COMPILE(,,ac_nocrossjumping=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-crossjumping",ac_nocrossjumping=no)
  484: CFLAGS="$CFLAGS_1"
  485: AC_MSG_RESULT($ac_nocrossjumping)
  486: 
  487: # Try if GCC understands -fno-reorder-blocks
  488: AC_MSG_CHECKING([if $CC understands -fno-reorder-blocks])
  489: CFLAGS_1="$CFLAGS"
  490: CFLAGS="$CFLAGS -fno-reorder-blocks"
  491: AC_TRY_COMPILE(,,ac_noreorder_blocks=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-reorder-blocks",ac_noreorder_blocks=no)
  492: CFLAGS="$CFLAGS_1"
  493: AC_MSG_RESULT($ac_noreorder_blocks)
  494: 
  495: # Try if GCC understands __attribute__((unused))
  496: AC_MSG_CHECKING([how to suppress 'unused variable' warnings])
  497: AC_TRY_COMPILE(,[int __attribute__((unused)) foo;], MAYBE_UNUSED='__attribute__((unused))',)
  498: AC_DEFINE_UNQUOTED(MAYBE_UNUSED,$MAYBE_UNUSED,[attribute for possibly unused variables])
  499: AC_MSG_RESULT($MAYBE_UNUSED)
  500: 
  501: AC_CHECK_PROG(asm_fs,asm.fs,arch/$machine/asm.fs,,$srcdir/arch/$machine)
  502: AC_SUBST(asm_fs)
  503: 
  504: AC_CHECK_PROG(disasm_fs,disasm.fs,arch/$machine/disasm.fs,,$srcdir/arch/$machine)
  505: AC_SUBST(disasm_fs)
  506: 
  507: AC_PATH_PROG(INSTALL_INFO,install-info,[echo '>>>>Please make info dir entry:'],$PATH:/sbin:/usr/sbin:/usr/local/sbin)
  508: 
  509: case "$host_os" in
  510: 	*win32*)
  511: 		# !!!FIXME!!! problems with cygwin and ';' as path separator
  512: 		DIRSEP="\\\\"
  513: 		PATHSEP=";"
  514: 		#we want the builtins of command.com/cmd.exe and its
  515: 		# handling of .com files.
  516: 		#$COMSPEC contains the name of the Windows shell;
  517: 		# the ./ is there, because the bash does not recognize
  518: 		# absolute DOS filenames
  519: 		DEFAULTSYSTEMPREFIX="./$COMSPEC /c "
  520: 		;;
  521: 	*darwin*)
  522: 		#Darwin uses some funny preprocessor by default; eliminate it:
  523: 		AC_MSG_NOTICE([using -no-cpp-precomp on Darwin])
  524: 		CFLAGS="$CFLAGS -no-cpp-precomp"
  525: 		DIRSEP="/"
  526: 		PATHSEP=":"
  527: 		DEFAULTSYSTEMPREFIX=""
  528: 		;;
  529: 	*)
  530: 		DIRSEP="/"
  531: 		PATHSEP=":"
  532: 		DEFAULTSYSTEMPREFIX=""
  533: 		;;
  534: esac
  535: AC_SUBST(DIRSEP)
  536: AC_DEFINE_UNQUOTED(DIRSEP,'$DIRSEP',[a directory separator character])
  537: AC_SUBST(PATHSEP)
  538: AC_DEFINE_UNQUOTED(PATHSEP,'$PATHSEP',[a path separator character])
  539: AC_SUBST(DEFAULTSYSTEMPREFIX)
  540: AC_DEFINE_UNQUOTED(DEFAULTSYSTEMPREFIX,"$DEFAULTSYSTEMPREFIX",[default for environment variable GFORTHSYSTEMPREFIX])
  541: 
  542: dnl Now a little support for DOS/DJGCC
  543: AC_SUBST(GFORTH_EXE)
  544: GFORTH_EXE=""
  545: AC_SUBST(GFORTHFAST_EXE)
  546: GFORTHFAST_EXE=""
  547: AC_SUBST(GFORTHITC_EXE)
  548: GFORTHITC_EXE=""
  549: AC_SUBST(GFORTHDITC_EXE)
  550: GFORTHDITC_EXE=""
  551: 
  552: AC_SUBST(FORTHSIZES)
  553: 
  554: dnl if test "$PEEPHOLE" = "yes"
  555: dnl then
  556: dnl    PEEPHOLEFLAG="true"
  557: dnl    AC_DEFINE(HAS_PEEPHOLE,,[Define if you want to use peephole optimization])
  558: dnl else
  559: dnl    PEEPHOLEFLAG="false"
  560: dnl fi
  561: PEEPHOLEFLAG="true"
  562: AC_SUBST(PEEPHOLEFLAG)
  563: 
  564: dnl copy commands for systems that don't have links
  565: AC_SUBST(LINK_KERNL)
  566: LINK_KERNL=""
  567: 
  568: #if test $host_os=dos
  569: #then
  570: #  echo Configuring for DOS!!!
  571: #  MAKE_EXE="coff2exe gforth"
  572: #  LINK_KERNL='$(CP) kernl32l.fi kernel.fi'
  573: #fi
  574: 
  575: dnl the following macro produces a warning with autoconf-2.1
  576: AC_C_BIGENDIAN
  577: AC_SUBST(KERNEL)
  578: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
  579: if test $ac_cv_c_bigendian = yes; then
  580:   bytesex=b
  581:   KERNEL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
  582: else
  583:   bytesex=l
  584:   KERNEL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
  585: fi
  586: 
  587: #check how to do asm(".skip 16")
  588: echo "CFLAGS=$CFLAGS"
  589: echo "ac_link=$ac_link"
  590: AC_MSG_CHECKING([if and how we can waste code space])
  591: if test -z "$skipcode"; then
  592:     skipcode=no
  593:     CFLAGS_1="$CFLAGS"
  594:     CFLAGS="$CFLAGS $ENGINE_FLAGS"
  595:     for i in ".skip 16" ".block 16" ".org .+16" ".=.+16" ".space 16"
  596:     do
  597: 	AC_TRY_RUN(
  598: [int foo(int,int,int);
  599: main()
  600: {
  601:   exit(foo(0,0,0)!=16);
  602: }
  603: int foo(int x, int y, int z)
  604: {
  605:   static void *labels[]={&&label1, &&label2};
  606:   if (x) {
  607:     y++; /* workaround for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12108 */
  608:   label1:
  609:     asm("$i"); /* or ".space 16" or somesuch */
  610:   label2: ;
  611:   }
  612:   {
  613:   if (y) goto *labels[z]; /* workaround for gcc PR12108 */
  614:   return labels[1]-labels[0];
  615:   }
  616: }]
  617: 	,skipcode=$i; break
  618: 	,,)
  619:     done
  620:     CFLAGS=$CFLAGS_1
  621: fi
  622: AC_MSG_RESULT($skipcode)
  623: if test "$skipcode" = no
  624: then 
  625:     if test -z $no_dynamic_default; then
  626: 	no_dynamic_default=1
  627: 	AC_MSG_WARN(Disabling default dynamic native code generation)
  628:     fi
  629:     AC_DEFINE_UNQUOTED(SKIP16,((void)0),statement for skipping 16 bytes)
  630: else
  631:     AC_DEFINE_UNQUOTED(SKIP16,asm("$skipcode"),statement for skipping 16 bytes)
  632: fi
  633: 
  634: test "$no_dynamic_default" || no_dynamic_default=0
  635: AC_DEFINE_UNQUOTED(NO_DYNAMIC_DEFAULT,$no_dynamic_default,default value for no_dynamic)
  636: 
  637: dnl Checks for programs.
  638: AC_PROG_LN_S
  639: AC_PROG_INSTALL
  640: AC_CHECK_PROGS(TEXI2DVI,texi2dvi4a2ps texi2dvi)
  641: 
  642: dnl Checks for library functions
  643: dnl This check is just for making later checks link with libm.
  644: dnl using sin here is no good idea since it is built-into gcc and typechecked
  645: AC_CHECK_LIB(m,asin)
  646: AC_CHECK_LIB(dl,dlopen)
  647: dnl check for libffi 2.x
  648: AC_CHECK_LIB(ffi,ffi_call)
  649: if test $ac_cv_lib_ffi_ffi_call = yes
  650: then
  651: LIBFFIFLAG="true"
  652: FFCALLFLAG="false"
  653: OLDCALLFLAG="false"
  654: AC_DEFINE(HAS_LIBFFI,,[define this if you want to use the ffcall interface with libffi 2.0])
  655: else
  656: dnl check for ffcall libraries
  657: dnl unfortunately, these four calls are separated out into a library each.
  658: AC_CHECK_LIB(avcall,__builtin_avcall)
  659: AC_CHECK_LIB(callback,__vacall_r)
  660: AC_CHECK_LIB(vacall,vacall)
  661: AC_CHECK_LIB(trampoline,alloc_trampoline)
  662: LIBFFIFLAG="false"
  663: FFCALLFLAG="false"
  664: OLDCALLFLAG="true"
  665: 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])
  666: test $ac_cv_lib_avcall___builtin_avcall = no && AC_DEFINE(HAS_OLDCALL,,[define this if you want to use the old call libraries])
  667: fi
  668: AC_SUBST(LIBFFIFLAG)
  669: AC_SUBST(FFCALLFLAG)
  670: AC_SUBST(OLDCALLFLAG)
  671: if test "$host_os" != "nextstep3"
  672: then
  673: 	AC_FUNC_MEMCMP
  674: fi
  675: AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal atanh)
  676: AC_FUNC_FSEEKO
  677: AC_CHECK_FUNCS(ftello dlopen sys_siglist getrusage)
  678: AC_CHECK_TYPES(stack_t,,,[#include <signal.h>])
  679: AC_DECL_SYS_SIGLIST
  680: AC_CHECK_FUNC(getopt_long,[true],[AC_LIBOBJ(getopt) AC_LIBOBJ(getopt1)])
  681: AC_CHECK_FUNCS(expm1 log1p)
  682: AC_REPLACE_FUNCS(rint ecvt)
  683: dnl No check for select, because our replacement is no good under
  684: dnl anything but DOS
  685: AC_CHECK_HEADERS(sys/mman.h fnmatch.h)
  686: AC_FUNC_FNMATCH
  687: test $ac_cv_func_fnmatch_works = yes || AC_LIBOBJ(fnmatch)
  688: AC_CHECK_FUNCS(mmap sysconf getpagesize)
  689: AM_PATH_LISPDIR
  690: 
  691: kernel_fi=kernl${wordsize}${bytesex}.fi
  692: AC_SUBST(kernel_fi)
  693: 
  694: #this breaks bindists
  695: #dnl replace srource directory by absolute value
  696: #if test $srcdir = "."; then srcdir=`pwd` 
  697: #fi
  698: 
  699: AC_SUBST(machine)
  700: AC_CONFIG_FILES([
  701: Makefile
  702: Makedist
  703: gforthmi
  704: vmgen
  705: machpc.fs
  706: envos.fs
  707: engine/Makefile
  708: doc/version.texi
  709: build-ec ])
  710: AC_CONFIG_COMMANDS([stamp-h],[[echo timestamp > stamp-h
  711: chmod +x gforthmi
  712: chmod +x vmgen
  713: chmod +x build-ec
  714: test -d kernel||mkdir kernel]],[[]])
  715: AC_OUTPUT
  716: 

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