File:  [gforth] / gforth / configure.in
Revision 1.177: download - view: text, annotated - select for diffs
Mon Mar 19 12:54:41 2007 UTC (12 years, 8 months ago) by anton
Branches: MAIN
CVS tags: HEAD
portability fixes for ARM

    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 "$enable_force_ll" = "no"||
   54:   AC_DEFINE(FORCE_LL,,[Define if you want to use explicit long long declarations for better performance (does not work with all GCC versions on all machines)])
   55: 
   56: AC_ARG_ENABLE(force-cdiv,
   57: 	AC_HELP_STRING([--enable-force-cdiv],
   58: 		       [  Use the native C division - symmetric - instead of
   59: 		          floored division (default disabled).]),
   60: 	,enable_force_cdiv=no)
   61: test "$enable_force_cdiv" = "no"||
   62:   AC_DEFINE(FORCE_CDIV,,[Define if you want to use explicit symmetric division for better performance])
   63: 
   64: AC_SUBST(PROFEXES)
   65: AC_SUBST(PROFOBJS)
   66: AC_ARG_ENABLE(prof,
   67: 	AC_HELP_STRING([--enable-prof],
   68: 			[ Build gforth-prof, which outputs frequently occuring
   69:                           sequences of primitives.]),
   70: 	,enable_prof=no)
   71: if test "$enable_prof" = "no"; then
   72:   PROFEXES="gforth-prof\$(EXE)"; PROFOBJS="engine-prof.o main-prof.o profile.o"
   73: fi
   74: 
   75: AC_ARG_WITH(debug,
   76: [  --with-debug		  specifies option -g to compile with debug info
   77:   --without-debug	  omits the -g switch and creates smaller images on
   78: 			  machines where "strip" has problems with gcc style
   79: 			  debugging informations.],
   80: if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
   81: 
   82: dnl PEEPHOLE="yes"
   83: dnl AC_ARG_WITH(peephole,
   84: dnl [  --with-peephole	Enable peephole optimization (default)
   85: dnl   --without-peephole	disables peephole optimization. Creates smaller,
   86: dnl 			but slower images.],
   87: dnl PEEPHOLE="$withval")
   88: 
   89: AC_ARG_ENABLE(ec,
   90: 	AC_HELP_STRING([--enable-ec],
   91: 			[  Build gforth for systems without OS.]),
   92: 	,enable_ec=no)
   93: if test "$enable_ec" = "yes"; then
   94:   echo "defining standalone system"
   95:   AC_DEFINE(STANDALONE,,[Define if you want a Gforth without OS])
   96:   EC_MODE="true"
   97: else
   98:   echo "defining hosted system"
   99:   EC_MODE="false"
  100: fi
  101: 
  102: #variables mentioned in INSTALL
  103: AC_ARG_VAR(CC, [The C compiler (must support GNU C 2.x); gcc-2.95 recommended.])
  104: AC_ARG_VAR(FORTHSIZES, [Gforth command line options for the default stack and dictionary sizes (see INSTALL).])
  105: AC_ARG_VAR(STACK_CACHE_DEFAULT_FAST, [number of registers in the default stack cache state for gforth-fast and gforth-native (default 1).])
  106: 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)])
  107: 
  108: AC_ARG_VAR(ac_cv_sizeof_char_p, [sizeof(char *)])
  109: AC_ARG_VAR(ac_cv_sizeof_char, [sizeof(char)])
  110: AC_ARG_VAR(ac_cv_sizeof_short, [sizeof(short)])
  111: AC_ARG_VAR(ac_cv_sizeof_int, [sizeof(int)])
  112: AC_ARG_VAR(ac_cv_sizeof_long, [sizeof(long)])
  113: AC_ARG_VAR(ac_cv_sizeof_long_long, [sizeof(long long)])
  114: AC_ARG_VAR(ac_cv_sizeof_intptr_t, [sizeof(intptr_t)])
  115: AC_ARG_VAR(ac_cv_sizeof_int128_t, [sizeof(int128_t)])
  116: AC_ARG_VAR(ac_cv_sizeof_uint128_t, [sizeof(uint128_t)])
  117: AC_ARG_VAR(ac_cv_c_bigendian, [Is the target big-endian ("yes" or "no")?])
  118: AC_ARG_VAR(no_dynamic_default, [run gforth with --dynamic (0) or --no-dynamic (1) by default])
  119: AC_ARG_VAR(skipcode, [assembly code for skipping 16 bytes of code])
  120: AC_ARG_VAR(asmcomment, [assembler comment start string])
  121: AC_ARG_VAR(arm_cacheflush, [file containing ARM cacheflush function (without .c)])
  122: 
  123: #set up feature test macros, so the tests get them right:
  124: # turn on all POSIX, SUSv3, and GNU features if available
  125: AC_GNU_SOURCE
  126: dnl AC_DEFINE_UNQUOTED([_GNU_SOURCE],1,[feature test macro])
  127: 
  128: dnl Don't define _POSIX_SOURCE etc. because some OSs (in particular
  129: dnl MacOSX) disable some features then (MacOSX checks for _POSIX_SOURCE,
  130: dnl but not for _XOPEN_SOURCE)
  131: dnl AC_DEFINE_UNQUOTED([_POSIX_SOURCE],1,[feature test macro])
  132: dnl AC_DEFINE_UNQUOTED([_POSIX_C_SOURCE],199506L,[feature test macro])
  133: dnl AC_DEFINE_UNQUOTED([_XOPEN_SOURCE],600,[feature test macro])
  134: # turn on large file support with 64-bit off_t where available
  135: AC_SYS_LARGEFILE
  136: dnl AC_DEFINE_UNQUOTED([_LARGEFILE_SOURCE],1,[feature test macro])
  137: dnl AC_DEFINE_UNQUOTED([_FILE_OFFSET_BITS],64,[feature test macro])
  138: 
  139: #currently we force direct threading this way.  Eventually we should
  140: #setup in the arch and engine files right
  141: 
  142: AC_PROG_CC
  143: 
  144: test "$GCC" = "yes" || AC_MSG_ERROR(Gforth uses GNU C extensions and requires GCC 2.0 or higher)
  145: 
  146: AC_SUBST(CC)
  147: AC_SUBST(DEBUGFLAG)
  148: AC_SUBST(EC_MODE)
  149: 
  150: #this is used to disable some (not generally essential) part of the
  151: #Makefile that some makes don't grok.  It would be better to test for
  152: #this specific Makefile feature than the make version.
  153: AC_MSG_CHECKING(make type)
  154: make_type=`make -n -v 2>&1|grep 'ake'|sed 's/ake .*/ake/'`
  155: GNUMAKE='#'
  156: test "$make_type" = "GNU Make" && GNUMAKE=''
  157: AC_MSG_RESULT($make_type)
  158: AC_SUBST(GNUMAKE)
  159: 
  160: AC_MSG_CHECKING([whether the linker accepts -export-dynamic])
  161: OLDLDFLAGS=$LDFLAGS
  162: LDFLAGS="$LDFLAGS -export-dynamic"
  163: dnl AC_TRY_LINK gives false positive on rs6000-ibm-aix4.2.1.0
  164: dnl AC_TRY_LINK(,,ac_export_dynamic=yes,ac_export_dynamic=no)
  165: AC_TRY_RUN(main(){exit(0);},ac_export_dynamic=yes,ac_export_dynamic=no,ac_export_dynamic=no)
  166: test $ac_export_dynamic = yes|| LDFLAGS=$OLDLDFLAGS
  167: AC_MSG_RESULT($ac_export_dynamic)
  168: 
  169: #terminology is a bit unusual here: The host is the system on which
  170: #gforth will run; the system on which configure will run is the `build'
  171: AC_CANONICAL_HOST
  172: case "$host_cpu" in
  173: 	arm*)
  174: 		machine=arm
  175: 		CFLAGS="$CFLAGS -fomit-frame-pointer"
  176: 		if test -z $arm_cacheflush; then
  177: 		    no_dynamic_default=1
  178:                     arm_cacheflush=arch/arm/cacheflush0
  179: 		    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
  180: 		fi
  181:                 AC_LIBSOURCES([../arch/arm/cacheflush0, ../arch/arm/cacheflush1, ../arch/arm/cacheflush2])
  182:                 AC_LIBOBJ(../$arm_cacheflush)
  183:                 #longer skipcodes lead to problems on ARM, and it uses
  184:                 #only 4-byte alignment anyway
  185: 		test "$skipcode" || skipcode="nop"
  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, $STACK_CACHE_DEFAULT_FAST,
  280: 		   [number of registers in the default stack cache state for gforth-fast and gforth-native])
  281: 
  282: test x$GCC_PR15242_WORKAROUND = x ||
  283: AC_DEFINE_UNQUOTED(GCC_PR15242_WORKAROUND, $GCC_PR15242_WORKAROUND,
  284:                    [force (1) or forbid (0) use of a workaround for a gcc performance bug])
  285: 
  286: dnl AC_DEFINE(GCC_PR15242_WORKAROUND,,[Define if you want to get dynamic code
  287: dnl generation on gccs affected by PR15242])
  288: 
  289: 
  290: if test "${enable_force_ll+set}" = set; then
  291:    ac_includes_default="$ac_includes_default
  292: #include \"arch/generic/128bit.h\""
  293: fi
  294: 
  295: dnl the following macro produces a warning with autoconf-2.1
  296: AC_CHECK_SIZEOF(char *)
  297: case "$ac_cv_sizeof_char_p" in
  298:   2)
  299:     wordsize=16
  300:     ;;
  301:   4)
  302:     wordsize=32
  303:     ;;
  304:   8)
  305:     wordsize=64
  306:     ;;
  307: esac
  308: 
  309: AC_CHECK_SIZEOF(char)
  310: AC_CHECK_SIZEOF(short)
  311: AC_CHECK_SIZEOF(int)
  312: AC_CHECK_SIZEOF(long)
  313: AC_CHECK_SIZEOF(long long)
  314: AC_CHECK_SIZEOF(intptr_t)
  315: AC_CHECK_SIZEOF(int128_t)
  316: AC_CHECK_SIZEOF(uint128_t)
  317: 
  318: AC_MSG_CHECKING([for a C type for cells])
  319: ac_cv_int_type_cell=none
  320: case "$ac_cv_sizeof_char_p" in
  321:   $ac_cv_sizeof_int)
  322:     ac_cv_int_type_cell=int
  323:     ;;
  324:   $ac_cv_sizeof_short)
  325:     ac_cv_int_type_cell=short
  326:     ;;
  327:   $ac_cv_sizeof_char)
  328:     ac_cv_int_type_cell=char
  329:     ;;
  330:   $ac_cv_sizeof_long)
  331:     ac_cv_int_type_cell=long
  332:     ;;
  333:   $ac_cv_sizeof_long_long)
  334:     ac_cv_int_type_cell="long long"
  335:     ;;
  336:   $ac_cv_sizeof_intptr_t)
  337:     ac_cv_int_type_cell="intptr_t"
  338:     ;;
  339:   $ac_cv_sizeof_int128_t)
  340:     ac_cv_int_type_cell="int128_t"
  341:     ;;
  342: esac
  343: AC_MSG_RESULT($ac_cv_int_type_cell)
  344: AC_DEFINE_UNQUOTED(CELL_TYPE,$ac_cv_int_type_cell,[an integer type that is as long as a pointer])
  345: 
  346: AC_MSG_CHECKING([for a C type for wydes])
  347: ac_cv_wyde_type_cell=none
  348: case 2 in
  349:   $ac_cv_sizeof_int)
  350:     ac_cv_wyde_type_cell=int
  351:     ;;
  352:   $ac_cv_sizeof_short)
  353:     ac_cv_wyde_type_cell=short
  354:     ;;
  355:   $ac_cv_sizeof_char)
  356:     ac_cv_wyde_type_cell=char
  357:     ;;
  358:   $ac_cv_sizeof_long)
  359:     ac_cv_wyde_type_cell=long
  360:     ;;
  361:   $ac_cv_sizeof_long_long)
  362:     ac_cv_wyde_type_cell="long long"
  363:     ;;
  364:   $ac_cv_sizeof_intptr_t)
  365:     ac_cv_wyde_type_cell="intptr_t"
  366:     ;;
  367:   $ac_cv_sizeof_int128_t)
  368:     ac_cv_wyde_type_cell="int128_t"
  369:     ;;
  370: esac
  371: AC_MSG_RESULT($ac_cv_wyde_type_cell)
  372: AC_DEFINE_UNQUOTED(WYDE_TYPE,$ac_cv_wyde_type_cell,[an integer type that is 2 bytes long])
  373: 
  374: AC_MSG_CHECKING([for a C type for tetrabytes])
  375: ac_cv_tetrabyte_type_cell=none
  376: case 4 in
  377:   $ac_cv_sizeof_int)
  378:     ac_cv_tetrabyte_type_cell=int
  379:     ;;
  380:   $ac_cv_sizeof_short)
  381:     ac_cv_tetrabyte_type_cell=short
  382:     ;;
  383:   $ac_cv_sizeof_char)
  384:     ac_cv_tetrabyte_type_cell=char
  385:     ;;
  386:   $ac_cv_sizeof_long)
  387:     ac_cv_tetrabyte_type_cell=long
  388:     ;;
  389:   $ac_cv_sizeof_long_long)
  390:     ac_cv_tetrabyte_type_cell="long long"
  391:     ;;
  392:   $ac_cv_sizeof_intptr_t)
  393:     ac_cv_tetrabyte_type_cell="intptr_t"
  394:     ;;
  395:   $ac_cv_sizeof_int128_t)
  396:     ac_cv_tetrabyte_type_cell="int128_t"
  397:     ;;
  398: esac
  399: AC_MSG_RESULT($ac_cv_tetrabyte_type_cell)
  400: AC_DEFINE_UNQUOTED(TETRABYTE_TYPE,$ac_cv_tetrabyte_type_cell,[an integer type that is 4 bytes long])
  401: 
  402: AC_MSG_CHECKING([for a C type for double-cells])
  403: ac_cv_int_type_double_cell=none
  404: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
  405:   $ac_cv_sizeof_short)
  406:     ac_cv_int_type_double_cell=short
  407:     ;;
  408:   $ac_cv_sizeof_int)
  409:     ac_cv_int_type_double_cell=int
  410:     ;;
  411:   $ac_cv_sizeof_long)
  412:     ac_cv_int_type_double_cell=long
  413:     ;;
  414:   $ac_cv_sizeof_long_long)
  415:     ac_cv_int_type_double_cell="long long"
  416:     ;;
  417:   $ac_cv_sizeof_intptr_t)
  418:     ac_cv_int_type_double_cell="intptr_t"
  419:     ;;
  420:   $ac_cv_sizeof_int128_t)
  421:     ac_cv_int_type_double_cell="int128_t"
  422:     ;;
  423: esac
  424: AC_MSG_RESULT($ac_cv_int_type_double_cell)
  425: 
  426: AC_MSG_CHECKING([for a C type for unsigned double-cells])
  427: ac_cv_int_type_double_ucell=none
  428: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
  429:   $ac_cv_sizeof_short)
  430:     ac_cv_int_type_double_ucell="unsigned short"
  431:     ;;
  432:   $ac_cv_sizeof_int)
  433:     ac_cv_int_type_double_ucell="unsigned int"
  434:     ;;
  435:   $ac_cv_sizeof_long)
  436:     ac_cv_int_type_double_ucell="unsigned long"
  437:     ;;
  438:   $ac_cv_sizeof_long_long)
  439:     ac_cv_int_type_double_ucell="unsigned long long"
  440:     ;;
  441:   $ac_cv_sizeof_intptr_t)
  442:     ac_cv_int_type_double_ucell="unsigned intptr_t"
  443:     ;;
  444:   $ac_cv_sizeof_uint128_t)
  445:     ac_cv_int_type_double_ucell="uint128_t"
  446:     ;;
  447: esac
  448: AC_MSG_RESULT($ac_cv_int_type_double_ucell)
  449: 
  450: if test "$ac_cv_int_type_double_cell" = none || \
  451:    test "$ac_cv_int_type_double_ucell" = none
  452: then
  453: 	AC_MSG_WARN([Emulating double-cell arithmetic. This may be slow.])
  454: 	AC_LIBOBJ(dblsub)
  455: 	AC_DEFINE(BUGGY_LONG_LONG,,[define this if there is no working DOUBLE_CELL_TYPE on your machine])
  456: else
  457: 	AC_DEFINE_UNQUOTED(DOUBLE_CELL_TYPE,$ac_cv_int_type_double_cell,[an integer type that is twice as long as a pointer])
  458: 	AC_DEFINE_UNQUOTED(DOUBLE_UCELL_TYPE,$ac_cv_int_type_double_ucell,[an unsigned integer type that is twice as long as a pointer])
  459: fi
  460: 
  461: AC_TYPE_OFF_T
  462: AC_CHECK_SIZEOF(off_t)
  463: test $ac_cv_sizeof_off_t -gt $ac_cv_sizeof_char_p
  464: ac_small_off_t=$?
  465: AC_DEFINE_UNQUOTED(SMALL_OFF_T,$ac_small_off_t,[1 if off_t fits in a Cell])
  466: 
  467: ENGINE_FLAGS=
  468: AC_SUBST(ENGINE_FLAGS)
  469: 
  470: # Try if GCC understands -fno-gcse
  471: 
  472: AC_MSG_CHECKING([if $CC understands -fno-gcse])
  473: CFLAGS_1="$CFLAGS"
  474: CFLAGS="$CFLAGS -fno-gcse"
  475: AC_TRY_COMPILE(,,ac_nogcse=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-gcse",ac_nogcse=no)
  476: CFLAGS="$CFLAGS_1"
  477: AC_MSG_RESULT($ac_nogcse)
  478: 
  479: # Try if GCC understands -fno-strict-aliasing
  480: AC_MSG_CHECKING([if $CC understands -fno-strict-aliasing])
  481: CFLAGS_1="$CFLAGS"
  482: CFLAGS="$CFLAGS -fno-strict-aliasing"
  483: AC_TRY_COMPILE(,,ac_nostrictaliasing=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-strict-aliasing",ac_nostrictaliasing=no)
  484: CFLAGS="$CFLAGS_1"
  485: AC_MSG_RESULT($ac_nostrictaliasing)
  486: 
  487: # Try if GCC understands -fno-crossjumping
  488: AC_MSG_CHECKING([if $CC understands -fno-crossjumping])
  489: CFLAGS_1="$CFLAGS"
  490: CFLAGS="$CFLAGS -fno-crossjumping"
  491: AC_TRY_COMPILE(,,ac_nocrossjumping=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-crossjumping",ac_nocrossjumping=no)
  492: CFLAGS="$CFLAGS_1"
  493: AC_MSG_RESULT($ac_nocrossjumping)
  494: 
  495: # Try if GCC understands -fno-reorder-blocks
  496: AC_MSG_CHECKING([if $CC understands -fno-reorder-blocks])
  497: CFLAGS_1="$CFLAGS"
  498: CFLAGS="$CFLAGS -fno-reorder-blocks"
  499: AC_TRY_COMPILE(,,ac_noreorder_blocks=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-reorder-blocks",ac_noreorder_blocks=no)
  500: CFLAGS="$CFLAGS_1"
  501: AC_MSG_RESULT($ac_noreorder_blocks)
  502: 
  503: # Try if GCC understands __attribute__((unused))
  504: AC_MSG_CHECKING([how to suppress 'unused variable' warnings])
  505: AC_TRY_COMPILE(,[int __attribute__((unused)) foo;], MAYBE_UNUSED='__attribute__((unused))',)
  506: AC_DEFINE_UNQUOTED(MAYBE_UNUSED,$MAYBE_UNUSED,[attribute for possibly unused variables])
  507: AC_MSG_RESULT($MAYBE_UNUSED)
  508: 
  509: AC_CHECK_PROG(asm_fs,asm.fs,arch/$machine/asm.fs,,$srcdir/arch/$machine)
  510: AC_SUBST(asm_fs)
  511: 
  512: AC_CHECK_PROG(disasm_fs,disasm.fs,arch/$machine/disasm.fs,,$srcdir/arch/$machine)
  513: AC_SUBST(disasm_fs)
  514: 
  515: AC_PATH_PROG(INSTALL_INFO,install-info,[echo '>>>>Please make info dir entry:'],$PATH:/sbin:/usr/sbin:/usr/local/sbin)
  516: 
  517: case "$host_os" in
  518: 	*win32*)
  519: 		# !!!FIXME!!! problems with cygwin and ';' as path separator
  520: 		DIRSEP="\\\\"
  521: 		PATHSEP=";"
  522: 		#we want the builtins of command.com/cmd.exe and its
  523: 		# handling of .com files.
  524: 		#$COMSPEC contains the name of the Windows shell;
  525: 		# the ./ is there, because the bash does not recognize
  526: 		# absolute DOS filenames
  527: 		DEFAULTSYSTEMPREFIX="./$COMSPEC /c "
  528: 		;;
  529: 	*darwin*)
  530: 		#Darwin uses some funny preprocessor by default; eliminate it:
  531: 		AC_MSG_NOTICE([using -no-cpp-precomp on Darwin])
  532: 		CFLAGS="$CFLAGS -no-cpp-precomp"
  533: 		DIRSEP="/"
  534: 		PATHSEP=":"
  535: 		DEFAULTSYSTEMPREFIX=""
  536: 		;;
  537: 	*)
  538: 		DIRSEP="/"
  539: 		PATHSEP=":"
  540: 		DEFAULTSYSTEMPREFIX=""
  541: 		;;
  542: esac
  543: AC_SUBST(DIRSEP)
  544: AC_DEFINE_UNQUOTED(DIRSEP,'$DIRSEP',[a directory separator character])
  545: AC_SUBST(PATHSEP)
  546: AC_DEFINE_UNQUOTED(PATHSEP,'$PATHSEP',[a path separator character])
  547: AC_SUBST(DEFAULTSYSTEMPREFIX)
  548: AC_DEFINE_UNQUOTED(DEFAULTSYSTEMPREFIX,"$DEFAULTSYSTEMPREFIX",[default for environment variable GFORTHSYSTEMPREFIX])
  549: 
  550: #work around SELinux brain damage (from Andrew Haley <12t8f3jakb74g2c@news.supernews.com>)
  551: #This magic incantation  seems to be completely undocumented.
  552: AC_CHECK_PROG([MASSAGE_EXE],[chcon],[chcon -t unconfined_execmem_exec_t],[true])
  553: 
  554: dnl Now a little support for DOS/DJGCC
  555: AC_SUBST(GFORTH_EXE)
  556: GFORTH_EXE=""
  557: AC_SUBST(GFORTHFAST_EXE)
  558: GFORTHFAST_EXE=""
  559: AC_SUBST(GFORTHITC_EXE)
  560: GFORTHITC_EXE=""
  561: AC_SUBST(GFORTHDITC_EXE)
  562: GFORTHDITC_EXE=""
  563: 
  564: AC_SUBST(FORTHSIZES)
  565: 
  566: dnl if test "$PEEPHOLE" = "yes"
  567: dnl then
  568: dnl    PEEPHOLEFLAG="true"
  569: dnl    AC_DEFINE(HAS_PEEPHOLE,,[Define if you want to use peephole optimization])
  570: dnl else
  571: dnl    PEEPHOLEFLAG="false"
  572: dnl fi
  573: PEEPHOLEFLAG="true"
  574: AC_SUBST(PEEPHOLEFLAG)
  575: 
  576: dnl copy commands for systems that don't have links
  577: AC_SUBST(LINK_KERNL)
  578: LINK_KERNL=""
  579: 
  580: #if test $host_os=dos
  581: #then
  582: #  echo Configuring for DOS!!!
  583: #  MAKE_EXE="coff2exe gforth"
  584: #  LINK_KERNL='$(CP) kernl32l.fi kernel.fi'
  585: #fi
  586: 
  587: dnl the following macro produces a warning with autoconf-2.1
  588: AC_C_BIGENDIAN
  589: AC_SUBST(KERNEL)
  590: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
  591: if test $ac_cv_c_bigendian = yes; then
  592:   bytesex=b
  593:   KERNEL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
  594: else
  595:   bytesex=l
  596:   KERNEL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
  597: fi
  598: 
  599: #check how to do asm(".skip 16")
  600: #echo "CFLAGS=$CFLAGS"
  601: #echo "ac_link=$ac_link"
  602: AC_MSG_CHECKING([if and how we can waste code space])
  603: if test -z "$skipcode"; then
  604:     skipcode=no
  605:     CFLAGS_1="$CFLAGS"
  606:     CFLAGS="$CFLAGS $ENGINE_FLAGS"
  607:     for i in ".skip 16" ".block 16" ".org .+16" ".=.+16" ".space 16"
  608:     do
  609: 	AC_TRY_RUN(
  610: [int foo(int,int,int);
  611: main()
  612: {
  613:   exit(foo(0,0,0)!=16);
  614: }
  615: int foo(int x, int y, int z)
  616: {
  617:   static void *labels[]={&&label1, &&label2};
  618:   if (x) {
  619:     y++; /* workaround for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12108 */
  620:   label1:
  621:     asm("$i"); /* or ".space 16" or somesuch */
  622:   label2: ;
  623:   }
  624:   {
  625:   if (y) goto *labels[z]; /* workaround for gcc PR12108 */
  626:   return labels[1]-labels[0];
  627:   }
  628: }]
  629: 	,skipcode=$i; break
  630: 	,,)
  631:     done
  632:     CFLAGS=$CFLAGS_1
  633: fi
  634: AC_MSG_RESULT($skipcode)
  635: if test "$skipcode" = no
  636: then 
  637:     if test -z $no_dynamic_default; then
  638: 	no_dynamic_default=1
  639: 	AC_MSG_WARN(Disabling default dynamic native code generation)
  640:     fi
  641:     AC_DEFINE_UNQUOTED(SKIP16,((void)0),statement for skipping 16 bytes)
  642: else
  643:     AC_DEFINE_UNQUOTED(SKIP16,asm("$skipcode"),statement for skipping 16 bytes)
  644: fi
  645: 
  646: AC_MSG_CHECKING([if and how we can do comments in asm statements])
  647: #the point here is to get asm statements that look different to
  648: #gcc's "optimizer"
  649: if test -z "$asmcomment"; then
  650:     asmcomment=no
  651:     CFLAGS_1="$CFLAGS"
  652:     CFLAGS="$CFLAGS $ENGINE_FLAGS"
  653:     for i in '"# "' '"! "' '"; "'; do
  654: 	AC_TRY_COMPILE(,[asm($i"fluffystunk");],asmcomment=$i; break,)
  655:     done
  656:     CFLAGS=$CFLAGS_1
  657: fi
  658: AC_MSG_RESULT($asmcomment)
  659: if test "$asmcomment" != no
  660: then 
  661:     AC_DEFINE_UNQUOTED(ASMCOMMENT,$asmcomment,[assembler comment start string])
  662: fi
  663: 
  664: test "$no_dynamic_default" || no_dynamic_default=0
  665: AC_DEFINE_UNQUOTED(NO_DYNAMIC_DEFAULT,$no_dynamic_default,default value for no_dynamic)
  666: 
  667: dnl Checks for programs.
  668: AC_PROG_LN_S
  669: AC_PROG_INSTALL
  670: AC_CHECK_PROGS(TEXI2DVI,texi2dvi4a2ps texi2dvi)
  671: 
  672: dnl Checks for library functions
  673: dnl This check is just for making later checks link with libm.
  674: dnl using sin here is no good idea since it is built-into gcc and typechecked
  675: AC_CHECK_LIB(m,asin)
  676: AC_CHECK_LIB(dl,dlopen)
  677: dnl check for libffi 2.x
  678: AC_CHECK_LIB(ffi,ffi_call)
  679: if test $ac_cv_lib_ffi_ffi_call = yes
  680: then
  681: LIBFFIFLAG="true"
  682: FFCALLFLAG="false"
  683: OLDCALLFLAG="false"
  684: AC_DEFINE(HAS_LIBFFI,,[define this if you want to use the ffcall interface with libffi 2.0])
  685: else
  686: dnl check for ffcall libraries
  687: dnl unfortunately, these four calls are separated out into a library each.
  688: AC_CHECK_LIB(avcall,__builtin_avcall)
  689: AC_CHECK_LIB(callback,__vacall_r)
  690: AC_CHECK_LIB(vacall,vacall)
  691: AC_CHECK_LIB(trampoline,alloc_trampoline)
  692: LIBFFIFLAG="false"
  693: FFCALLFLAG="false"
  694: OLDCALLFLAG="true"
  695: 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])
  696: test $ac_cv_lib_avcall___builtin_avcall = no && AC_DEFINE(HAS_OLDCALL,,[define this if you want to use the old call libraries])
  697: fi
  698: AC_SUBST(LIBFFIFLAG)
  699: AC_SUBST(FFCALLFLAG)
  700: AC_SUBST(OLDCALLFLAG)
  701: if test "$host_os" != "nextstep3"
  702: then
  703: 	AC_FUNC_MEMCMP
  704: fi
  705: AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal atanh)
  706: AC_FUNC_FSEEKO
  707: AC_CHECK_FUNCS(ftello dlopen sys_siglist getrusage)
  708: AC_CHECK_TYPES(stack_t,,,[#include <signal.h>])
  709: AC_DECL_SYS_SIGLIST
  710: AC_CHECK_FUNC(getopt_long,[true],[AC_LIBOBJ(getopt) AC_LIBOBJ(getopt1)])
  711: AC_CHECK_FUNCS(expm1 log1p)
  712: AC_REPLACE_FUNCS(rint ecvt)
  713: dnl No check for select, because our replacement is no good under
  714: dnl anything but DOS
  715: AC_CHECK_HEADERS(sys/mman.h fnmatch.h)
  716: AC_FUNC_FNMATCH
  717: test $ac_cv_func_fnmatch_works = yes || AC_LIBOBJ(fnmatch)
  718: AC_CHECK_FUNCS(mmap sysconf getpagesize)
  719: AM_PATH_LISPDIR
  720: 
  721: kernel_fi=kernl${wordsize}${bytesex}.fi
  722: AC_SUBST(kernel_fi)
  723: 
  724: #this breaks bindists
  725: #dnl replace srource directory by absolute value
  726: #if test $srcdir = "."; then srcdir=`pwd` 
  727: #fi
  728: 
  729: AC_SUBST(machine)
  730: AC_CONFIG_FILES([
  731: Makefile
  732: Makedist
  733: gforthmi
  734: vmgen
  735: machpc.fs
  736: envos.fs
  737: engine/Makefile
  738: doc/version.texi
  739: build-ec ])
  740: AC_CONFIG_COMMANDS([stamp-h],[[echo timestamp > stamp-h
  741: chmod +x gforthmi
  742: chmod +x vmgen
  743: chmod +x build-ec
  744: test -d kernel||mkdir kernel]],[[]])
  745: AC_OUTPUT
  746: 

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