File:  [gforth] / gforth / configure.in
Revision 1.166: download - view: text, annotated - select for diffs
Wed Jan 10 12:43:29 2007 UTC (12 years, 10 months ago) by anton
Branches: MAIN
CVS tags: HEAD
minor bugfix

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

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