File:  [gforth] / gforth / configure.in
Revision 1.174: download - view: text, annotated - select for diffs
Sat Mar 17 19:14:57 2007 UTC (12 years, 7 months ago) by anton
Branches: MAIN
CVS tags: HEAD
portability fixes for sparc-sun-solaris2.10:
  Support assembler comments other than "#", plus fallback
  better GNU make detection (does not make during configuring any more)

    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: 
  122: #set up feature test macros, so the tests get them right:
  123: # turn on all POSIX, SUSv3, and GNU features if available
  124: AC_GNU_SOURCE
  125: dnl AC_DEFINE_UNQUOTED([_GNU_SOURCE],1,[feature test macro])
  126: 
  127: dnl Don't define _POSIX_SOURCE etc. because some OSs (in particular
  128: dnl MacOSX) disable some features then (MacOSX checks for _POSIX_SOURCE,
  129: dnl but not for _XOPEN_SOURCE)
  130: dnl AC_DEFINE_UNQUOTED([_POSIX_SOURCE],1,[feature test macro])
  131: dnl AC_DEFINE_UNQUOTED([_POSIX_C_SOURCE],199506L,[feature test macro])
  132: dnl AC_DEFINE_UNQUOTED([_XOPEN_SOURCE],600,[feature test macro])
  133: # turn on large file support with 64-bit off_t where available
  134: AC_SYS_LARGEFILE
  135: dnl AC_DEFINE_UNQUOTED([_LARGEFILE_SOURCE],1,[feature test macro])
  136: dnl AC_DEFINE_UNQUOTED([_FILE_OFFSET_BITS],64,[feature test macro])
  137: 
  138: #currently we force direct threading this way.  Eventually we should
  139: #setup in the arch and engine files right
  140: 
  141: AC_PROG_CC
  142: 
  143: test "$GCC" = "yes" || AC_MSG_ERROR(Gforth uses GNU C extensions and requires GCC 2.0 or higher)
  144: 
  145: AC_SUBST(CC)
  146: AC_SUBST(DEBUGFLAG)
  147: AC_SUBST(EC_MODE)
  148: 
  149: #this is used to disable some (not generally essential) part of the
  150: #Makefile that some makes don't grok.  It would be better to test for
  151: #this specific Makefile feature than the make version.
  152: AC_MSG_CHECKING(make type)
  153: make_type=`make -n -v 2>&1|grep 'ake'|sed 's/ake .*/ake/'`
  154: GNUMAKE='#'
  155: test "$make_type" = "GNU Make" && GNUMAKE=''
  156: AC_MSG_RESULT($make_type)
  157: AC_SUBST(GNUMAKE)
  158: 
  159: AC_MSG_CHECKING([whether the linker accepts -export-dynamic])
  160: OLDLDFLAGS=$LDFLAGS
  161: LDFLAGS="$LDFLAGS -export-dynamic"
  162: dnl AC_TRY_LINK gives false positive on rs6000-ibm-aix4.2.1.0
  163: dnl AC_TRY_LINK(,,ac_export_dynamic=yes,ac_export_dynamic=no)
  164: AC_TRY_RUN(main(){exit(0);},ac_export_dynamic=yes,ac_export_dynamic=no,ac_export_dynamic=no)
  165: test $ac_export_dynamic = yes|| LDFLAGS=$OLDLDFLAGS
  166: AC_MSG_RESULT($ac_export_dynamic)
  167: 
  168: #terminology is a bit unusual here: The host is the system on which
  169: #gforth will run; the system on which configure will run is the `build'
  170: AC_CANONICAL_HOST
  171: case "$host_cpu" in
  172: 	arm*)
  173: 		machine=arm
  174: 		CFLAGS="$CFLAGS -fomit-frame-pointer"
  175: 		if test -z $no_dynamic_default; then
  176: 		    no_dynamic_default=1
  177: 		    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
  178: 		fi
  179: 		;;
  180: 	hppa*)
  181: 		machine=hppa
  182: 		$srcdir/mkinstalldirs arch/hppa
  183: 		AC_LIBOBJ(../arch/hppa/cache)
  184: 		#-N needed for --dynamic <M4U3b.3790$9d.317@news.cpqcorp.net>
  185: 		LDFLAGS="$LDFLAGS -Xlinker -N"
  186: 		LIBS="$LIBS -L/lib/pa1.1/"
  187: 		;;
  188: 	sparc*)
  189: 		machine=sparc
  190: 		;;
  191: 	i386)
  192: 		machine=386
  193: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
  194: 		;;
  195: 	i486)
  196: 		machine=386
  197: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem -m486"
  198: 		;;
  199: 	i*86)
  200: 		machine=386
  201: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
  202: 		CFLAGS_1="$CFLAGS"
  203: 		CFLAGS="$CFLAGS -march=pentium"
  204: 		AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1 -m486")
  205: 		;;
  206: 	x86_64)
  207: 		machine=amd64
  208: 		;;
  209: 	ia64*)
  210: 		machine=ia64
  211: 		AC_LIBOBJ(../arch/ia64/flush_icache_block)
  212: 		test "$skipcode" || skipcode="nop.i 0"
  213: 		#".skip 16" passes the test below,
  214: 		# but gives an assembler error in engine
  215: 		;;
  216:         m68k)
  217: 		machine=m68k
  218: 		CFLAGS="$CFLAGS -fomit-frame-pointer"
  219: 		if test "$host_os" = "nextstep3"
  220: 		then
  221: 			AC_LIBOBJ(termios)
  222: 		fi
  223: 		;;
  224: 	mips*)
  225: 		machine=mips
  226: 		#dynamic native code has the following problems on MIPS:
  227: 		#
  228: 		#1) J/JAL seems relocatable, but is are only
  229: 		#relocatable within a 256MB-segment.  While we try to
  230: 		#get the linker to arrange this, there is no guarantee
  231: 		#that this will succeed (and if the user uses a lot of
  232: 		#memory, it is likely to fail).
  233: 		#
  234: 		#2) The way we generate dynamic native code may
  235: 		#violate MIPS architectural restrictions (in
  236: 		#particular, the delay slots of LW, MFLO, etc.)
  237: 		#
  238: 		#Therefore we disable dynamic native code by default:
  239: 		if test -z $no_dynamic_default; then
  240: 		    no_dynamic_default=1
  241: 		    AC_MSG_WARN([Disabling default dynamic native code generation (relocation and delay slot issues)])
  242: 		fi
  243: 		;;
  244: 	alpha*)
  245: 		machine=alpha
  246: 		#full IEEE FP support for more uniformity across platforms:
  247: 		CFLAGS="$CFLAGS -mieee"
  248: 		;;
  249: 	power*|rs6000)
  250: 		machine=power
  251: 		$srcdir/mkinstalldirs arch/power
  252: 		AC_CHECK_FUNC(_sync_cache_range,[true],[AC_LIBOBJ(../arch/power/_sync_cache_range)])
  253: 		#long long is broken on (at least) gcc-2.95.* for PPC
  254: 		test x$ac_cv_sizeof_long_long = x && 
  255: 		($CC -v 2>&1 |grep -q 'gcc version 2.95') &&
  256: 		ac_cv_sizeof_long_long=0
  257: 		;;
  258: 	*)
  259: 		AC_MSG_WARN([Using a generic machine description])
  260: 		AC_MSG_WARN([Assuming C floats and doubles are IEEE floats and doubles (for SF@ DF@ SF! DF!)])
  261: 		AC_MSG_WARN([FLUSH-ICACHE will do nothing, so END-CODE may not work properly!])
  262: 		machine=generic
  263: 		#I-cache flushing would be needed for dynamic code generation
  264: 		if test -z $no_dynamic_default; then
  265: 		    no_dynamic_default=1
  266: 		    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
  267: 		fi
  268: esac
  269: AC_SUBST(host)
  270: 
  271: test x$STACK_CACHE_DEFAULT_FAST = x && STACK_CACHE_DEFAULT_FAST=1
  272: AC_DEFINE_UNQUOTED(STACK_CACHE_DEFAULT_FAST, $STACK_CACHE_DEFAULT_FAST,
  273: 		   [number of registers in the default stack cache state for gforth-fast and gforth-native])
  274: 
  275: test x$GCC_PR15242_WORKAROUND = x ||
  276: AC_DEFINE_UNQUOTED(GCC_PR15242_WORKAROUND, $GCC_PR15242_WORKAROUND,
  277:                    [force (1) or forbid (0) use of a workaround for a gcc performance bug])
  278: 
  279: dnl AC_DEFINE(GCC_PR15242_WORKAROUND,,[Define if you want to get dynamic code
  280: dnl generation on gccs affected by PR15242])
  281: 
  282: 
  283: if test "${enable_force_ll+set}" = set; then
  284:    ac_includes_default="$ac_includes_default
  285: #include \"arch/generic/128bit.h\""
  286: fi
  287: 
  288: dnl the following macro produces a warning with autoconf-2.1
  289: AC_CHECK_SIZEOF(char *)
  290: case "$ac_cv_sizeof_char_p" in
  291:   2)
  292:     wordsize=16
  293:     ;;
  294:   4)
  295:     wordsize=32
  296:     ;;
  297:   8)
  298:     wordsize=64
  299:     ;;
  300: esac
  301: 
  302: AC_CHECK_SIZEOF(char)
  303: AC_CHECK_SIZEOF(short)
  304: AC_CHECK_SIZEOF(int)
  305: AC_CHECK_SIZEOF(long)
  306: AC_CHECK_SIZEOF(long long)
  307: AC_CHECK_SIZEOF(intptr_t)
  308: AC_CHECK_SIZEOF(int128_t)
  309: AC_CHECK_SIZEOF(uint128_t)
  310: 
  311: AC_MSG_CHECKING([for a C type for cells])
  312: ac_cv_int_type_cell=none
  313: case "$ac_cv_sizeof_char_p" in
  314:   $ac_cv_sizeof_int)
  315:     ac_cv_int_type_cell=int
  316:     ;;
  317:   $ac_cv_sizeof_short)
  318:     ac_cv_int_type_cell=short
  319:     ;;
  320:   $ac_cv_sizeof_char)
  321:     ac_cv_int_type_cell=char
  322:     ;;
  323:   $ac_cv_sizeof_long)
  324:     ac_cv_int_type_cell=long
  325:     ;;
  326:   $ac_cv_sizeof_long_long)
  327:     ac_cv_int_type_cell="long long"
  328:     ;;
  329:   $ac_cv_sizeof_intptr_t)
  330:     ac_cv_int_type_cell="intptr_t"
  331:     ;;
  332:   $ac_cv_sizeof_int128_t)
  333:     ac_cv_int_type_cell="int128_t"
  334:     ;;
  335: esac
  336: AC_MSG_RESULT($ac_cv_int_type_cell)
  337: AC_DEFINE_UNQUOTED(CELL_TYPE,$ac_cv_int_type_cell,[an integer type that is as long as a pointer])
  338: 
  339: AC_MSG_CHECKING([for a C type for wydes])
  340: ac_cv_wyde_type_cell=none
  341: case 2 in
  342:   $ac_cv_sizeof_int)
  343:     ac_cv_wyde_type_cell=int
  344:     ;;
  345:   $ac_cv_sizeof_short)
  346:     ac_cv_wyde_type_cell=short
  347:     ;;
  348:   $ac_cv_sizeof_char)
  349:     ac_cv_wyde_type_cell=char
  350:     ;;
  351:   $ac_cv_sizeof_long)
  352:     ac_cv_wyde_type_cell=long
  353:     ;;
  354:   $ac_cv_sizeof_long_long)
  355:     ac_cv_wyde_type_cell="long long"
  356:     ;;
  357:   $ac_cv_sizeof_intptr_t)
  358:     ac_cv_wyde_type_cell="intptr_t"
  359:     ;;
  360:   $ac_cv_sizeof_int128_t)
  361:     ac_cv_wyde_type_cell="int128_t"
  362:     ;;
  363: esac
  364: AC_MSG_RESULT($ac_cv_wyde_type_cell)
  365: AC_DEFINE_UNQUOTED(WYDE_TYPE,$ac_cv_wyde_type_cell,[an integer type that is 2 bytes long])
  366: 
  367: AC_MSG_CHECKING([for a C type for tetrabytes])
  368: ac_cv_tetrabyte_type_cell=none
  369: case 4 in
  370:   $ac_cv_sizeof_int)
  371:     ac_cv_tetrabyte_type_cell=int
  372:     ;;
  373:   $ac_cv_sizeof_short)
  374:     ac_cv_tetrabyte_type_cell=short
  375:     ;;
  376:   $ac_cv_sizeof_char)
  377:     ac_cv_tetrabyte_type_cell=char
  378:     ;;
  379:   $ac_cv_sizeof_long)
  380:     ac_cv_tetrabyte_type_cell=long
  381:     ;;
  382:   $ac_cv_sizeof_long_long)
  383:     ac_cv_tetrabyte_type_cell="long long"
  384:     ;;
  385:   $ac_cv_sizeof_intptr_t)
  386:     ac_cv_tetrabyte_type_cell="intptr_t"
  387:     ;;
  388:   $ac_cv_sizeof_int128_t)
  389:     ac_cv_tetrabyte_type_cell="int128_t"
  390:     ;;
  391: esac
  392: AC_MSG_RESULT($ac_cv_tetrabyte_type_cell)
  393: AC_DEFINE_UNQUOTED(TETRABYTE_TYPE,$ac_cv_tetrabyte_type_cell,[an integer type that is 4 bytes long])
  394: 
  395: AC_MSG_CHECKING([for a C type for double-cells])
  396: ac_cv_int_type_double_cell=none
  397: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
  398:   $ac_cv_sizeof_short)
  399:     ac_cv_int_type_double_cell=short
  400:     ;;
  401:   $ac_cv_sizeof_int)
  402:     ac_cv_int_type_double_cell=int
  403:     ;;
  404:   $ac_cv_sizeof_long)
  405:     ac_cv_int_type_double_cell=long
  406:     ;;
  407:   $ac_cv_sizeof_long_long)
  408:     ac_cv_int_type_double_cell="long long"
  409:     ;;
  410:   $ac_cv_sizeof_intptr_t)
  411:     ac_cv_int_type_double_cell="intptr_t"
  412:     ;;
  413:   $ac_cv_sizeof_int128_t)
  414:     ac_cv_int_type_double_cell="int128_t"
  415:     ;;
  416: esac
  417: AC_MSG_RESULT($ac_cv_int_type_double_cell)
  418: 
  419: AC_MSG_CHECKING([for a C type for unsigned double-cells])
  420: ac_cv_int_type_double_ucell=none
  421: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
  422:   $ac_cv_sizeof_short)
  423:     ac_cv_int_type_double_ucell="unsigned short"
  424:     ;;
  425:   $ac_cv_sizeof_int)
  426:     ac_cv_int_type_double_ucell="unsigned int"
  427:     ;;
  428:   $ac_cv_sizeof_long)
  429:     ac_cv_int_type_double_ucell="unsigned long"
  430:     ;;
  431:   $ac_cv_sizeof_long_long)
  432:     ac_cv_int_type_double_ucell="unsigned long long"
  433:     ;;
  434:   $ac_cv_sizeof_intptr_t)
  435:     ac_cv_int_type_double_ucell="unsigned intptr_t"
  436:     ;;
  437:   $ac_cv_sizeof_uint128_t)
  438:     ac_cv_int_type_double_ucell="uint128_t"
  439:     ;;
  440: esac
  441: AC_MSG_RESULT($ac_cv_int_type_double_ucell)
  442: 
  443: if test "$ac_cv_int_type_double_cell" = none || \
  444:    test "$ac_cv_int_type_double_ucell" = none
  445: then
  446: 	AC_MSG_WARN([Emulating double-cell arithmetic. This may be slow.])
  447: 	AC_LIBOBJ(dblsub)
  448: 	AC_DEFINE(BUGGY_LONG_LONG,,[define this if there is no working DOUBLE_CELL_TYPE on your machine])
  449: else
  450: 	AC_DEFINE_UNQUOTED(DOUBLE_CELL_TYPE,$ac_cv_int_type_double_cell,[an integer type that is twice as long as a pointer])
  451: 	AC_DEFINE_UNQUOTED(DOUBLE_UCELL_TYPE,$ac_cv_int_type_double_ucell,[an unsigned integer type that is twice as long as a pointer])
  452: fi
  453: 
  454: AC_TYPE_OFF_T
  455: AC_CHECK_SIZEOF(off_t)
  456: test $ac_cv_sizeof_off_t -gt $ac_cv_sizeof_char_p
  457: ac_small_off_t=$?
  458: AC_DEFINE_UNQUOTED(SMALL_OFF_T,$ac_small_off_t,[1 if off_t fits in a Cell])
  459: 
  460: ENGINE_FLAGS=
  461: AC_SUBST(ENGINE_FLAGS)
  462: 
  463: # Try if GCC understands -fno-gcse
  464: 
  465: AC_MSG_CHECKING([if $CC understands -fno-gcse])
  466: CFLAGS_1="$CFLAGS"
  467: CFLAGS="$CFLAGS -fno-gcse"
  468: AC_TRY_COMPILE(,,ac_nogcse=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-gcse",ac_nogcse=no)
  469: CFLAGS="$CFLAGS_1"
  470: AC_MSG_RESULT($ac_nogcse)
  471: 
  472: # Try if GCC understands -fno-strict-aliasing
  473: AC_MSG_CHECKING([if $CC understands -fno-strict-aliasing])
  474: CFLAGS_1="$CFLAGS"
  475: CFLAGS="$CFLAGS -fno-strict-aliasing"
  476: AC_TRY_COMPILE(,,ac_nostrictaliasing=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-strict-aliasing",ac_nostrictaliasing=no)
  477: CFLAGS="$CFLAGS_1"
  478: AC_MSG_RESULT($ac_nostrictaliasing)
  479: 
  480: # Try if GCC understands -fno-crossjumping
  481: AC_MSG_CHECKING([if $CC understands -fno-crossjumping])
  482: CFLAGS_1="$CFLAGS"
  483: CFLAGS="$CFLAGS -fno-crossjumping"
  484: AC_TRY_COMPILE(,,ac_nocrossjumping=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-crossjumping",ac_nocrossjumping=no)
  485: CFLAGS="$CFLAGS_1"
  486: AC_MSG_RESULT($ac_nocrossjumping)
  487: 
  488: # Try if GCC understands -fno-reorder-blocks
  489: AC_MSG_CHECKING([if $CC understands -fno-reorder-blocks])
  490: CFLAGS_1="$CFLAGS"
  491: CFLAGS="$CFLAGS -fno-reorder-blocks"
  492: AC_TRY_COMPILE(,,ac_noreorder_blocks=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-reorder-blocks",ac_noreorder_blocks=no)
  493: CFLAGS="$CFLAGS_1"
  494: AC_MSG_RESULT($ac_noreorder_blocks)
  495: 
  496: # Try if GCC understands __attribute__((unused))
  497: AC_MSG_CHECKING([how to suppress 'unused variable' warnings])
  498: AC_TRY_COMPILE(,[int __attribute__((unused)) foo;], MAYBE_UNUSED='__attribute__((unused))',)
  499: AC_DEFINE_UNQUOTED(MAYBE_UNUSED,$MAYBE_UNUSED,[attribute for possibly unused variables])
  500: AC_MSG_RESULT($MAYBE_UNUSED)
  501: 
  502: AC_CHECK_PROG(asm_fs,asm.fs,arch/$machine/asm.fs,,$srcdir/arch/$machine)
  503: AC_SUBST(asm_fs)
  504: 
  505: AC_CHECK_PROG(disasm_fs,disasm.fs,arch/$machine/disasm.fs,,$srcdir/arch/$machine)
  506: AC_SUBST(disasm_fs)
  507: 
  508: AC_PATH_PROG(INSTALL_INFO,install-info,[echo '>>>>Please make info dir entry:'],$PATH:/sbin:/usr/sbin:/usr/local/sbin)
  509: 
  510: case "$host_os" in
  511: 	*win32*)
  512: 		# !!!FIXME!!! problems with cygwin and ';' as path separator
  513: 		DIRSEP="\\\\"
  514: 		PATHSEP=";"
  515: 		#we want the builtins of command.com/cmd.exe and its
  516: 		# handling of .com files.
  517: 		#$COMSPEC contains the name of the Windows shell;
  518: 		# the ./ is there, because the bash does not recognize
  519: 		# absolute DOS filenames
  520: 		DEFAULTSYSTEMPREFIX="./$COMSPEC /c "
  521: 		;;
  522: 	*darwin*)
  523: 		#Darwin uses some funny preprocessor by default; eliminate it:
  524: 		AC_MSG_NOTICE([using -no-cpp-precomp on Darwin])
  525: 		CFLAGS="$CFLAGS -no-cpp-precomp"
  526: 		DIRSEP="/"
  527: 		PATHSEP=":"
  528: 		DEFAULTSYSTEMPREFIX=""
  529: 		;;
  530: 	*)
  531: 		DIRSEP="/"
  532: 		PATHSEP=":"
  533: 		DEFAULTSYSTEMPREFIX=""
  534: 		;;
  535: esac
  536: AC_SUBST(DIRSEP)
  537: AC_DEFINE_UNQUOTED(DIRSEP,'$DIRSEP',[a directory separator character])
  538: AC_SUBST(PATHSEP)
  539: AC_DEFINE_UNQUOTED(PATHSEP,'$PATHSEP',[a path separator character])
  540: AC_SUBST(DEFAULTSYSTEMPREFIX)
  541: AC_DEFINE_UNQUOTED(DEFAULTSYSTEMPREFIX,"$DEFAULTSYSTEMPREFIX",[default for environment variable GFORTHSYSTEMPREFIX])
  542: 
  543: #work around SELinux brain damage (from Andrew Haley <12t8f3jakb74g2c@news.supernews.com>)
  544: #This magic incantation  seems to be completely undocumented.
  545: AC_CHECK_PROG([MASSAGE_EXE],[chcon],[chcon -t unconfined_execmem_exec_t],[true])
  546: 
  547: dnl Now a little support for DOS/DJGCC
  548: AC_SUBST(GFORTH_EXE)
  549: GFORTH_EXE=""
  550: AC_SUBST(GFORTHFAST_EXE)
  551: GFORTHFAST_EXE=""
  552: AC_SUBST(GFORTHITC_EXE)
  553: GFORTHITC_EXE=""
  554: AC_SUBST(GFORTHDITC_EXE)
  555: GFORTHDITC_EXE=""
  556: 
  557: AC_SUBST(FORTHSIZES)
  558: 
  559: dnl if test "$PEEPHOLE" = "yes"
  560: dnl then
  561: dnl    PEEPHOLEFLAG="true"
  562: dnl    AC_DEFINE(HAS_PEEPHOLE,,[Define if you want to use peephole optimization])
  563: dnl else
  564: dnl    PEEPHOLEFLAG="false"
  565: dnl fi
  566: PEEPHOLEFLAG="true"
  567: AC_SUBST(PEEPHOLEFLAG)
  568: 
  569: dnl copy commands for systems that don't have links
  570: AC_SUBST(LINK_KERNL)
  571: LINK_KERNL=""
  572: 
  573: #if test $host_os=dos
  574: #then
  575: #  echo Configuring for DOS!!!
  576: #  MAKE_EXE="coff2exe gforth"
  577: #  LINK_KERNL='$(CP) kernl32l.fi kernel.fi'
  578: #fi
  579: 
  580: dnl the following macro produces a warning with autoconf-2.1
  581: AC_C_BIGENDIAN
  582: AC_SUBST(KERNEL)
  583: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
  584: if test $ac_cv_c_bigendian = yes; then
  585:   bytesex=b
  586:   KERNEL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
  587: else
  588:   bytesex=l
  589:   KERNEL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
  590: fi
  591: 
  592: #check how to do asm(".skip 16")
  593: #echo "CFLAGS=$CFLAGS"
  594: #echo "ac_link=$ac_link"
  595: AC_MSG_CHECKING([if and how we can waste code space])
  596: if test -z "$skipcode"; then
  597:     skipcode=no
  598:     CFLAGS_1="$CFLAGS"
  599:     CFLAGS="$CFLAGS $ENGINE_FLAGS"
  600:     for i in ".skip 16" ".block 16" ".org .+16" ".=.+16" ".space 16"
  601:     do
  602: 	AC_TRY_RUN(
  603: [int foo(int,int,int);
  604: main()
  605: {
  606:   exit(foo(0,0,0)!=16);
  607: }
  608: int foo(int x, int y, int z)
  609: {
  610:   static void *labels[]={&&label1, &&label2};
  611:   if (x) {
  612:     y++; /* workaround for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12108 */
  613:   label1:
  614:     asm("$i"); /* or ".space 16" or somesuch */
  615:   label2: ;
  616:   }
  617:   {
  618:   if (y) goto *labels[z]; /* workaround for gcc PR12108 */
  619:   return labels[1]-labels[0];
  620:   }
  621: }]
  622: 	,skipcode=$i; break
  623: 	,,)
  624:     done
  625:     CFLAGS=$CFLAGS_1
  626: fi
  627: AC_MSG_RESULT($skipcode)
  628: if test "$skipcode" = no
  629: then 
  630:     if test -z $no_dynamic_default; then
  631: 	no_dynamic_default=1
  632: 	AC_MSG_WARN(Disabling default dynamic native code generation)
  633:     fi
  634:     AC_DEFINE_UNQUOTED(SKIP16,((void)0),statement for skipping 16 bytes)
  635: else
  636:     AC_DEFINE_UNQUOTED(SKIP16,asm("$skipcode"),statement for skipping 16 bytes)
  637: fi
  638: 
  639: AC_MSG_CHECKING([if and how we can do comments in asm statements])
  640: #the point here is to get asm statements that look different to
  641: #gcc's "optimizer"
  642: if test -z "$asmcomment"; then
  643:     asmcomment=no
  644:     CFLAGS_1="$CFLAGS"
  645:     CFLAGS="$CFLAGS $ENGINE_FLAGS"
  646:     for i in '"# "' '"! "'; do
  647: 	AC_TRY_COMPILE(,[asm($i"fluffystunk");],asmcomment=$i; break,)
  648:     done
  649:     CFLAGS=$CFLAGS_1
  650: fi
  651: AC_MSG_RESULT($asmcomment)
  652: if test "$asmcomment" != no
  653: then 
  654:     AC_DEFINE_UNQUOTED(ASMCOMMENT,$asmcomment,[assembler comment start string])
  655: fi
  656: 
  657: test "$no_dynamic_default" || no_dynamic_default=0
  658: AC_DEFINE_UNQUOTED(NO_DYNAMIC_DEFAULT,$no_dynamic_default,default value for no_dynamic)
  659: 
  660: dnl Checks for programs.
  661: AC_PROG_LN_S
  662: AC_PROG_INSTALL
  663: AC_CHECK_PROGS(TEXI2DVI,texi2dvi4a2ps texi2dvi)
  664: 
  665: dnl Checks for library functions
  666: dnl This check is just for making later checks link with libm.
  667: dnl using sin here is no good idea since it is built-into gcc and typechecked
  668: AC_CHECK_LIB(m,asin)
  669: AC_CHECK_LIB(dl,dlopen)
  670: dnl check for libffi 2.x
  671: AC_CHECK_LIB(ffi,ffi_call)
  672: if test $ac_cv_lib_ffi_ffi_call = yes
  673: then
  674: LIBFFIFLAG="true"
  675: FFCALLFLAG="false"
  676: OLDCALLFLAG="false"
  677: AC_DEFINE(HAS_LIBFFI,,[define this if you want to use the ffcall interface with libffi 2.0])
  678: else
  679: dnl check for ffcall libraries
  680: dnl unfortunately, these four calls are separated out into a library each.
  681: AC_CHECK_LIB(avcall,__builtin_avcall)
  682: AC_CHECK_LIB(callback,__vacall_r)
  683: AC_CHECK_LIB(vacall,vacall)
  684: AC_CHECK_LIB(trampoline,alloc_trampoline)
  685: LIBFFIFLAG="false"
  686: FFCALLFLAG="false"
  687: OLDCALLFLAG="true"
  688: 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])
  689: test $ac_cv_lib_avcall___builtin_avcall = no && AC_DEFINE(HAS_OLDCALL,,[define this if you want to use the old call libraries])
  690: fi
  691: AC_SUBST(LIBFFIFLAG)
  692: AC_SUBST(FFCALLFLAG)
  693: AC_SUBST(OLDCALLFLAG)
  694: if test "$host_os" != "nextstep3"
  695: then
  696: 	AC_FUNC_MEMCMP
  697: fi
  698: AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal atanh)
  699: AC_FUNC_FSEEKO
  700: AC_CHECK_FUNCS(ftello dlopen sys_siglist getrusage)
  701: AC_CHECK_TYPES(stack_t,,,[#include <signal.h>])
  702: AC_DECL_SYS_SIGLIST
  703: AC_CHECK_FUNC(getopt_long,[true],[AC_LIBOBJ(getopt) AC_LIBOBJ(getopt1)])
  704: AC_CHECK_FUNCS(expm1 log1p)
  705: AC_REPLACE_FUNCS(rint ecvt)
  706: dnl No check for select, because our replacement is no good under
  707: dnl anything but DOS
  708: AC_CHECK_HEADERS(sys/mman.h fnmatch.h)
  709: AC_FUNC_FNMATCH
  710: test $ac_cv_func_fnmatch_works = yes || AC_LIBOBJ(fnmatch)
  711: AC_CHECK_FUNCS(mmap sysconf getpagesize)
  712: AM_PATH_LISPDIR
  713: 
  714: kernel_fi=kernl${wordsize}${bytesex}.fi
  715: AC_SUBST(kernel_fi)
  716: 
  717: #this breaks bindists
  718: #dnl replace srource directory by absolute value
  719: #if test $srcdir = "."; then srcdir=`pwd` 
  720: #fi
  721: 
  722: AC_SUBST(machine)
  723: AC_CONFIG_FILES([
  724: Makefile
  725: Makedist
  726: gforthmi
  727: vmgen
  728: machpc.fs
  729: envos.fs
  730: engine/Makefile
  731: doc/version.texi
  732: build-ec ])
  733: AC_CONFIG_COMMANDS([stamp-h],[[echo timestamp > stamp-h
  734: chmod +x gforthmi
  735: chmod +x vmgen
  736: chmod +x build-ec
  737: test -d kernel||mkdir kernel]],[[]])
  738: AC_OUTPUT
  739: 

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