File:  [gforth] / gforth / configure.in
Revision 1.149: download - view: text, annotated - select for diffs
Mon Jan 24 18:47:50 2005 UTC (14 years, 9 months ago) by anton
Branches: MAIN
CVS tags: HEAD
bugfixes and modernization in configure.in

    1: dnl Process this file with autoconf to produce a configure script.
    2: 
    3: #Copyright (C) 1995,1996,1997,1998,2000,2003,2004 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],[0.6.2-20030910],[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="September 10, 2003"
   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_SUBST(PROFEXES)
   68: AC_SUBST(PROFOBJS)
   69: AC_ARG_ENABLE(prof,
   70: 	AC_HELP_STRING([--enable-prof],
   71: 			[ Build gforth-prof, which outputs frequently occuring
   72:                           sequences of primitives.]),
   73: 	,enable_prof=no)
   74: if test "$enable_prof" = "no"; then
   75:   PROFEXES="gforth-prof\$(EXE)"; PROFOBJS="engine-prof.o main-prof.o profile.o"
   76: fi
   77: 
   78: AC_ARG_WITH(debug,
   79: [  --with-debug		  specifies option -g to compile with debug info
   80:   --without-debug	  omits the -g switch and creates smaller images on
   81: 			  machines where "strip" has problems with gcc style
   82: 			  debugging informations.],
   83: if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
   84: 
   85: dnl PEEPHOLE="yes"
   86: dnl AC_ARG_WITH(peephole,
   87: dnl [  --with-peephole	Enable peephole optimization (default)
   88: dnl   --without-peephole	disables peephole optimization. Creates smaller,
   89: dnl 			but slower images.],
   90: dnl PEEPHOLE="$withval")
   91: 
   92: #variables mentioned in INSTALL
   93: AC_ARG_VAR(CC, [The C compiler (must support GNU C 2.x); gcc-2.95 recommended.])
   94: AC_ARG_VAR(FORTHSIZES, [Gforth command line options for the default stack and dictionary sizes (see INSTALL).])
   95: AC_ARG_VAR(ac_cv_sizeof_char_p, [sizeof(char *)])
   96: AC_ARG_VAR(ac_cv_sizeof_char, [sizeof(char)])
   97: AC_ARG_VAR(ac_cv_sizeof_short, [sizeof(short)])
   98: AC_ARG_VAR(ac_cv_sizeof_int, [sizeof(int)])
   99: AC_ARG_VAR(ac_cv_sizeof_long, [sizeof(long)])
  100: AC_ARG_VAR(ac_cv_sizeof_long_long, [sizeof(long long)])
  101: AC_ARG_VAR(ac_cv_sizeof_intptr_t, [sizeof(intptr_t)])
  102: AC_ARG_VAR(ac_cv_sizeof_int128_t, [sizeof(int128_t)])
  103: AC_ARG_VAR(ac_cv_sizeof_uint128_t, [sizeof(uint128_t)])
  104: AC_ARG_VAR(ac_cv_c_bigendian, [Is the target big-endian ("yes" or "no")?])
  105: AC_ARG_VAR(no_dynamic_default, [run gforth with --dynamic (0) or --no-dynamic (1) by default])
  106: AC_ARG_VAR(skip_code, [assembly code for skipping 16 bytes of code])
  107: 
  108: #set up feature test macros, so the tests get them right:
  109: # turn on all POSIX, SUSv3, and GNU features if available
  110: AC_GNU_SOURCE
  111: dnl AC_DEFINE_UNQUOTED([_GNU_SOURCE],1,[feature test macro])
  112: 
  113: dnl Don't define _POSIX_SOURCE etc. because some OSs (in particular
  114: dnl MacOSX) disable some features then (MacOSX checks for _POSIX_SOURCE,
  115: dnl but not for _XOPEN_SOURCE)
  116: dnl AC_DEFINE_UNQUOTED([_POSIX_SOURCE],1,[feature test macro])
  117: dnl AC_DEFINE_UNQUOTED([_POSIX_C_SOURCE],199506L,[feature test macro])
  118: dnl AC_DEFINE_UNQUOTED([_XOPEN_SOURCE],600,[feature test macro])
  119: # turn on large file support with 64-bit off_t where available
  120: AC_SYS_LARGEFILE
  121: dnl AC_DEFINE_UNQUOTED([_LARGEFILE_SOURCE],1,[feature test macro])
  122: dnl AC_DEFINE_UNQUOTED([_FILE_OFFSET_BITS],64,[feature test macro])
  123: 
  124: #currently we force direct threading this way.  Eventually we should
  125: #setup in the arch and engine files right
  126: 
  127: AC_PROG_CC
  128: 
  129: test "$GCC" = "yes" || AC_MSG_ERROR(Gforth uses GNU C extensions and requires GCC 2.0 or higher)
  130: 
  131: AC_SUBST(CC)
  132: AC_SUBST(DEBUGFLAG)
  133: 
  134: AC_MSG_CHECKING(make type)
  135: make_type=`make -v 2>&1|grep 'ake version'|sed 's/ version .*//'`
  136: 
  137: GNUMAKE='#'
  138: test "$make_type" = "GNU Make" && GNUMAKE=''
  139: 
  140: AC_MSG_RESULT($make_type)
  141: 
  142: AC_SUBST(GNUMAKE)
  143: 
  144: AC_MSG_CHECKING([whether the linker accepts -export-dynamic])
  145: OLDLDFLAGS=$LDFLAGS
  146: LDFLAGS="$LDFLAGS -export-dynamic"
  147: dnl AC_TRY_LINK gives false positive on rs6000-ibm-aix4.2.1.0
  148: dnl AC_TRY_LINK(,,ac_export_dynamic=yes,ac_export_dynamic=no)
  149: AC_TRY_RUN(main(){exit(0);},ac_export_dynamic=yes,ac_export_dynamic=no,ac_export_dynamic=no)
  150: test $ac_export_dynamic = yes|| LDFLAGS=$OLDLDFLAGS
  151: AC_MSG_RESULT($ac_export_dynamic)
  152: 
  153: #terminology is a bit unusual here: The host is the system on which
  154: #gforth will run; the system on which configure will run is the `build'
  155: AC_CANONICAL_HOST
  156: case "$host_cpu" in
  157: 	arm*)
  158: 		machine=arm
  159: 		CFLAGS="$CFLAGS -fomit-frame-pointer"
  160: 		if test -z $no_dynamic_default; then
  161: 		    no_dynamic_default=1
  162: 		    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
  163: 		fi
  164: 		;;
  165: 	hppa*)
  166: 		machine=hppa
  167: 		$srcdir/mkinstalldirs arch/hppa
  168: 		AC_LIBOBJ(../arch/hppa/cache)
  169: 		#-N needed for --dynamic <M4U3b.3790$9d.317@news.cpqcorp.net>
  170: 		LDFLAGS="$LDFLAGS -Xlinker -N"
  171: 		LIBS="$LIBS -L/lib/pa1.1/"
  172: 		;;
  173: 	sparc*)
  174: 		machine=sparc
  175: 		;;
  176: 	i386)
  177: 		machine=386
  178: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
  179: 		;;
  180: 	i486)
  181: 		machine=386
  182: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem -m486"
  183: 		;;
  184: 	i*86)
  185: 		machine=386
  186: 		CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
  187: 		CFLAGS_1="$CFLAGS"
  188: 		CFLAGS="$CFLAGS -march=pentium"
  189: 		AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1 -m486")
  190: 		;;
  191: 	x86_64)
  192: 		machine=amd64
  193: 		;;
  194: 	ia64*)
  195: 		machine=ia64
  196: 		AC_LIBOBJ(../arch/ia64/flush_icache_block)
  197: 		test "$skipcode" || skipcode="nop.i 0"
  198: 		#".skip 16" passes the test below,
  199: 		# but gives an assembler error in engine
  200: 		;;
  201:         m68k)
  202: 		machine=m68k
  203: 		CFLAGS="$CFLAGS -fomit-frame-pointer"
  204: 		if test "$host_os" = "nextstep3"
  205: 		then
  206: 			AC_LIBOBJ(termios)
  207: 		fi
  208: 		;;
  209: 	mips*)
  210: 		machine=mips
  211: 		#dynamic native code has the following problems on MIPS:
  212: 		#
  213: 		#1) J/JAL seems relocatable, but is are only
  214: 		#relocatable within a 256MB-segment.  While we try to
  215: 		#get the linker to arrange this, there is no guarantee
  216: 		#that this will succeed (and if the user uses a lot of
  217: 		#memory, it is likely to fail).
  218: 		#
  219: 		#2) The way we generate dynamic native code may
  220: 		#violate MIPS architectural restrictions (in
  221: 		#particular, the delay slots of LW, MFLO, etc.)
  222: 		#
  223: 		#Therefore we disable dynamic native code by default:
  224: 		if test -z $no_dynamic_default; then
  225: 		    no_dynamic_default=1
  226: 		    AC_MSG_WARN([Disabling default dynamic native code generation (relocation and delay slot issues)])
  227: 		fi
  228: 		;;
  229: 	alpha*)
  230: 		machine=alpha
  231: 		#full IEEE FP support for more uniformity across platforms:
  232: 		CFLAGS="$CFLAGS -mieee"
  233: 		;;
  234: 	power*|rs6000)
  235: 		machine=power
  236: 		$srcdir/mkinstalldirs arch/power
  237: 		AC_CHECK_FUNC(_sync_cache_range,[true],[AC_LIBOBJ(../arch/power/_sync_cache_range)])
  238: 		#long long is broken on (at least) gcc-2.95.* for PPC
  239: 		test x$ac_cv_sizeof_long_long = x && ac_cv_sizeof_long_long=0
  240: 		;;
  241: 	*)
  242: 		AC_MSG_WARN([Using a generic machine description])
  243: 		AC_MSG_WARN([Assuming C floats and doubles are IEEE floats and doubles (for SF@ DF@ SF! DF!)])
  244: 		AC_MSG_WARN([FLUSH-ICACHE will do nothing, so END-CODE may not work properly!])
  245: 		machine=generic
  246: 		#I-cache flushing would be needed for dynamic code generation
  247: 		if test -z $no_dynamic_default; then
  248: 		    no_dynamic_default=1
  249: 		    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
  250: 		fi
  251: esac
  252: AC_SUBST(host)
  253: 
  254: if test "${enable_force_ll+set}" = set; then
  255:    ac_includes_default="$ac_includes_default
  256: #include \"arch/generic/128bit.h\""
  257: fi
  258: 
  259: dnl the following macro produces a warning with autoconf-2.1
  260: AC_CHECK_SIZEOF(char *)
  261: case "$ac_cv_sizeof_char_p" in
  262:   2)
  263:     wordsize=16
  264:     ;;
  265:   4)
  266:     wordsize=32
  267:     ;;
  268:   8)
  269:     wordsize=64
  270:     ;;
  271: esac
  272: 
  273: AC_CHECK_SIZEOF(char)
  274: AC_CHECK_SIZEOF(short)
  275: AC_CHECK_SIZEOF(int)
  276: AC_CHECK_SIZEOF(long)
  277: AC_CHECK_SIZEOF(long long)
  278: AC_CHECK_SIZEOF(intptr_t)
  279: AC_CHECK_SIZEOF(int128_t)
  280: AC_CHECK_SIZEOF(uint128_t)
  281: 
  282: AC_MSG_CHECKING([for a C type for cells])
  283: ac_cv_int_type_cell=none
  284: case "$ac_cv_sizeof_char_p" in
  285:   $ac_cv_sizeof_int)
  286:     ac_cv_int_type_cell=int
  287:     ;;
  288:   $ac_cv_sizeof_short)
  289:     ac_cv_int_type_cell=short
  290:     ;;
  291:   $ac_cv_sizeof_char)
  292:     ac_cv_int_type_cell=char
  293:     ;;
  294:   $ac_cv_sizeof_long)
  295:     ac_cv_int_type_cell=long
  296:     ;;
  297:   $ac_cv_sizeof_long_long)
  298:     ac_cv_int_type_cell="long long"
  299:     ;;
  300:   $ac_cv_sizeof_intptr_t)
  301:     ac_cv_int_type_cell="intptr_t"
  302:     ;;
  303:   $ac_cv_sizeof_int128_t)
  304:     ac_cv_int_type_cell="int128_t"
  305:     ;;
  306: esac
  307: AC_MSG_RESULT($ac_cv_int_type_cell)
  308: AC_DEFINE_UNQUOTED(CELL_TYPE,$ac_cv_int_type_cell,[an integer type that is as long as a pointer])
  309: 
  310: AC_MSG_CHECKING([for a C type for double-cells])
  311: ac_cv_int_type_double_cell=none
  312: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
  313:   $ac_cv_sizeof_short)
  314:     ac_cv_int_type_double_cell=short
  315:     ;;
  316:   $ac_cv_sizeof_int)
  317:     ac_cv_int_type_double_cell=int
  318:     ;;
  319:   $ac_cv_sizeof_long)
  320:     ac_cv_int_type_double_cell=long
  321:     ;;
  322:   $ac_cv_sizeof_long_long)
  323:     ac_cv_int_type_double_cell="long long"
  324:     ;;
  325:   $ac_cv_sizeof_intptr_t)
  326:     ac_cv_int_type_double_cell="intptr_t"
  327:     ;;
  328:   $ac_cv_sizeof_int128_t)
  329:     ac_cv_int_type_double_cell="int128_t"
  330:     ;;
  331: esac
  332: AC_MSG_RESULT($ac_cv_int_type_double_cell)
  333: 
  334: AC_MSG_CHECKING([for a C type for unsigned double-cells])
  335: ac_cv_int_type_double_ucell=none
  336: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
  337:   $ac_cv_sizeof_short)
  338:     ac_cv_int_type_double_ucell="unsigned short"
  339:     ;;
  340:   $ac_cv_sizeof_int)
  341:     ac_cv_int_type_double_ucell="unsigned int"
  342:     ;;
  343:   $ac_cv_sizeof_long)
  344:     ac_cv_int_type_double_ucell="unsigned long"
  345:     ;;
  346:   $ac_cv_sizeof_long_long)
  347:     ac_cv_int_type_double_ucell="unsigned long long"
  348:     ;;
  349:   $ac_cv_sizeof_intptr_t)
  350:     ac_cv_int_type_double_ucell="unsigned intptr_t"
  351:     ;;
  352:   $ac_cv_sizeof_uint128_t)
  353:     ac_cv_int_type_double_ucell="uint128_t"
  354:     ;;
  355: esac
  356: AC_MSG_RESULT($ac_cv_int_type_double_ucell)
  357: 
  358: if test "$ac_cv_int_type_double_cell" = none || \
  359:    test "$ac_cv_int_type_double_ucell" = none
  360: then
  361: 	AC_MSG_WARN([Emulating double-cell arithmetic. This may be slow.])
  362: 	AC_LIBOBJ(dblsub)
  363: 	AC_DEFINE(BUGGY_LONG_LONG,,[define this if there is no working DOUBLE_CELL_TYPE on your machine])
  364: else
  365: 	AC_DEFINE_UNQUOTED(DOUBLE_CELL_TYPE,$ac_cv_int_type_double_cell,[an integer type that is twice as long as a pointer])
  366: 	AC_DEFINE_UNQUOTED(DOUBLE_UCELL_TYPE,$ac_cv_int_type_double_ucell,[an unsigned integer type that is twice as long as a pointer])
  367: fi
  368: 
  369: AC_TYPE_OFF_T
  370: AC_CHECK_SIZEOF(off_t)
  371: test $ac_cv_sizeof_off_t -gt $ac_cv_sizeof_char_p
  372: ac_small_off_t=$?
  373: AC_DEFINE_UNQUOTED(SMALL_OFF_T,$ac_small_off_t,[1 if off_t fits in a Cell])
  374: 
  375: ENGINE_FLAGS=
  376: AC_SUBST(ENGINE_FLAGS)
  377: 
  378: # Try if GCC understands -fno-gcse
  379: 
  380: AC_MSG_CHECKING([if $CC understands -fno-gcse])
  381: CFLAGS_1="$CFLAGS"
  382: CFLAGS="$CFLAGS -fno-gcse"
  383: AC_TRY_COMPILE(,,ac_nogcse=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-gcse",ac_nogcse=no)
  384: CFLAGS="$CFLAGS_1"
  385: AC_MSG_RESULT($ac_nogcse)
  386: 
  387: # Try if GCC understands -fno-strict-aliasing
  388: AC_MSG_CHECKING([if $CC understands -fno-strict-aliasing])
  389: CFLAGS_1="$CFLAGS"
  390: CFLAGS="$CFLAGS -fno-strict-aliasing"
  391: AC_TRY_COMPILE(,,ac_nostrictaliasing=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-strict-aliasing",ac_nostrictaliasing=no)
  392: CFLAGS="$CFLAGS_1"
  393: AC_MSG_RESULT($ac_nostrictaliasing)
  394: 
  395: # Try if GCC understands -fno-crossjumping
  396: AC_MSG_CHECKING([if $CC understands -fno-crossjumping])
  397: CFLAGS_1="$CFLAGS"
  398: CFLAGS="$CFLAGS -fno-crossjumping"
  399: AC_TRY_COMPILE(,,ac_nocrossjumping=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-crossjumping",ac_nocrossjumping=no)
  400: CFLAGS="$CFLAGS_1"
  401: AC_MSG_RESULT($ac_nocrossjumping)
  402: 
  403: # Try if GCC understands -fno-reorder-blocks
  404: AC_MSG_CHECKING([if $CC understands -fno-reorder-blocks])
  405: CFLAGS_1="$CFLAGS"
  406: CFLAGS="$CFLAGS -fno-reorder-blocks"
  407: AC_TRY_COMPILE(,,ac_noreorder_blocks=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-reorder-blocks",ac_noreorder_blocks=no)
  408: CFLAGS="$CFLAGS_1"
  409: AC_MSG_RESULT($ac_noreorder_blocks)
  410: 
  411: # Try if GCC understands __attribute__((unused))
  412: AC_MSG_CHECKING([how to suppress 'unused variable' warnings])
  413: AC_TRY_COMPILE(,[int __attribute__((unused)) foo;], MAYBE_UNUSED='__attribute__((unused))',)
  414: AC_DEFINE_UNQUOTED(MAYBE_UNUSED,$MAYBE_UNUSED,[attribute for possibly unused variables])
  415: AC_MSG_RESULT($MAYBE_UNUSED)
  416: 
  417: AC_CHECK_PROG(asm_fs,asm.fs,arch/$machine/asm.fs,,$srcdir/arch/$machine)
  418: AC_SUBST(asm_fs)
  419: 
  420: AC_CHECK_PROG(disasm_fs,disasm.fs,arch/$machine/disasm.fs,,$srcdir/arch/$machine)
  421: AC_SUBST(disasm_fs)
  422: 
  423: AC_PATH_PROG(INSTALL_INFO,install-info,[echo '>>>>Please make info dir entry:'],$PATH:/sbin:/usr/sbin:/usr/local/sbin)
  424: 
  425: case "$host_os" in
  426: 	*win32|cygwin)
  427: 		DIRSEP="\\\\"
  428: 		PATHSEP=";"
  429: 		#we want the builtins of command.com/cmd.exe and its
  430: 		# handling of .com files.
  431: 		#$COMSPEC contains the name of the Windows shell;
  432: 		# the ./ is there, because the bash does not recognize
  433: 		# absolute DOS filenames
  434: 		DEFAULTSYSTEMPREFIX="./$COMSPEC /c "
  435: 		;;
  436: 	*darwin*)
  437: 		#Darwin uses some funny preprocessor by default; eliminate it:
  438: 		AC_MSG_NOTICE([using -no-cpp-precomp on Darwin])
  439: 		CFLAGS="$CFLAGS -no-cpp-precomp"
  440: 		DIRSEP="/"
  441: 		PATHSEP=":"
  442: 		DEFAULTSYSTEMPREFIX=""
  443: 		;;
  444: 	*)
  445: 		DIRSEP="/"
  446: 		PATHSEP=":"
  447: 		DEFAULTSYSTEMPREFIX=""
  448: 		;;
  449: esac
  450: AC_SUBST(DIRSEP)
  451: AC_DEFINE_UNQUOTED(DIRSEP,'$DIRSEP',[a directory separator character])
  452: AC_SUBST(PATHSEP)
  453: AC_DEFINE_UNQUOTED(PATHSEP,'$PATHSEP',[a path separator character])
  454: AC_SUBST(DEFAULTSYSTEMPREFIX)
  455: AC_DEFINE_UNQUOTED(DEFAULTSYSTEMPREFIX,"$DEFAULTSYSTEMPREFIX",[default for environment variable GFORTHSYSTEMPREFIX])
  456: 
  457: dnl Now a little support for DOS/DJGCC
  458: AC_SUBST(GFORTH_EXE)
  459: GFORTH_EXE=""
  460: AC_SUBST(GFORTHFAST_EXE)
  461: GFORTHFAST_EXE=""
  462: AC_SUBST(GFORTHITC_EXE)
  463: GFORTHITC_EXE=""
  464: AC_SUBST(GFORTHDITC_EXE)
  465: GFORTHDITC_EXE=""
  466: 
  467: AC_SUBST(FORTHSIZES)
  468: 
  469: dnl if test "$PEEPHOLE" = "yes"
  470: dnl then
  471: dnl    PEEPHOLEFLAG="true"
  472: dnl    AC_DEFINE(HAS_PEEPHOLE,,[Define if you want to use peephole optimization])
  473: dnl else
  474: dnl    PEEPHOLEFLAG="false"
  475: dnl fi
  476: PEEPHOLEFLAG="true"
  477: AC_SUBST(PEEPHOLEFLAG)
  478: 
  479: dnl copy commands for systems that don't have links
  480: AC_SUBST(LINK_KERNL)
  481: LINK_KERNL=""
  482: 
  483: #if test $host_os=dos
  484: #then
  485: #  echo Configuring for DOS!!!
  486: #  MAKE_EXE="coff2exe gforth"
  487: #  LINK_KERNL='$(CP) kernl32l.fi kernel.fi'
  488: #fi
  489: 
  490: dnl the following macro produces a warning with autoconf-2.1
  491: AC_C_BIGENDIAN
  492: AC_SUBST(KERNEL)
  493: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
  494: if test $ac_cv_c_bigendian = yes; then
  495:   bytesex=b
  496:   KERNEL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
  497: else
  498:   bytesex=l
  499:   KERNEL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
  500: fi
  501: 
  502: #check how to do asm(".skip 16")
  503: echo "CFLAGS=$CFLAGS"
  504: echo "ac_link=$ac_link"
  505: AC_MSG_CHECKING([if and how we can waste code space])
  506: if test -z "$skipcode"; then
  507:     skipcode=no
  508:     CFLAGS_1="$CFLAGS"
  509:     CFLAGS="$CFLAGS $ENGINE_FLAGS"
  510:     for i in ".skip 16" ".block 16" ".org .+16" ".=.+16" ".space 16"
  511:     do
  512: 	AC_TRY_RUN(
  513: [int foo(int,int,int);
  514: main()
  515: {
  516:   exit(foo(0,0,0)!=16);
  517: }
  518: int foo(int x, int y, int z)
  519: {
  520:   static void *labels[]={&&label1, &&label2};
  521:   if (x) {
  522:     y++; /* workaround for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12108 */
  523:   label1:
  524:     asm("$i"); /* or ".space 16" or somesuch */
  525:   label2: ;
  526:   }
  527:   {
  528:   if (y) goto *labels[z]; /* workaround for gcc PR12108 */
  529:   return labels[1]-labels[0];
  530:   }
  531: }]
  532: 	,skipcode=$i; break
  533: 	,,)
  534:     done
  535:     CFLAGS=$CFLAGS_1
  536: fi
  537: AC_MSG_RESULT($skipcode)
  538: if test "$skipcode" = no
  539: then 
  540:     if test -z $no_dynamic_default; then
  541: 	no_dynamic_default=1
  542: 	AC_MSG_WARN(Disabling default dynamic native code generation)
  543:     fi
  544:     AC_DEFINE_UNQUOTED(SKIP16,((void)0),statement for skipping 16 bytes)
  545: else
  546:     AC_DEFINE_UNQUOTED(SKIP16,asm("$skipcode"),statement for skipping 16 bytes)
  547: fi
  548: 
  549: test "$no_dynamic_default" || no_dynamic_default=0
  550: AC_DEFINE_UNQUOTED(NO_DYNAMIC_DEFAULT,$no_dynamic_default,default value for no_dynamic)
  551: 
  552: dnl Checks for programs.
  553: AC_PROG_LN_S
  554: AC_PROG_INSTALL
  555: 
  556: dnl Checks for library functions
  557: dnl This check is just for making later checks link with libm.
  558: dnl using sin here is no good idea since it is built-into gcc and typechecked
  559: AC_CHECK_LIB(m,asin)
  560: AC_CHECK_LIB(dl,dlopen)
  561: dnl check for ffcall libraries
  562: dnl unfortunately, these four calls are separated out into a library each.
  563: AC_CHECK_LIB(avcall,__builtin_avcall)
  564: AC_CHECK_LIB(callback,__vacall_r)
  565: AC_CHECK_LIB(vacall,vacall)
  566: AC_CHECK_LIB(trampoline,alloc_trampoline)
  567: FFCALLFLAG="false"
  568: OLDCALLFLAG="true"
  569: 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])
  570: test $ac_cv_lib_avcall___builtin_avcall = no && AC_DEFINE(HAS_OLDCALL,,[define this if you want to use the old call libraries])
  571: AC_SUBST(FFCALLFLAG)
  572: AC_SUBST(OLDCALLFLAG)
  573: if test "$host_os" != "nextstep3"
  574: then
  575: 	AC_FUNC_MEMCMP
  576: fi
  577: AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal atanh)
  578: AC_FUNC_FSEEKO
  579: AC_CHECK_FUNCS(ftello dlopen sys_siglist getrusage)
  580: AC_CHECK_TYPES(stack_t,,,[#include <signal.h>])
  581: AC_DECL_SYS_SIGLIST
  582: AC_CHECK_FUNC(getopt_long,[true],[AC_LIBOBJ(getopt) AC_LIBOBJ(getopt1)])
  583: AC_CHECK_FUNCS(expm1 log1p)
  584: AC_REPLACE_FUNCS(rint ecvt)
  585: dnl No check for select, because our replacement is no good under
  586: dnl anything but DOS
  587: AC_CHECK_HEADERS(sys/mman.h fnmatch.h)
  588: AC_FUNC_FNMATCH
  589: test $ac_cv_func_fnmatch_works = yes || AC_LIBOBJ(fnmatch)
  590: AC_CHECK_FUNCS(mmap sysconf getpagesize)
  591: AM_PATH_LISPDIR
  592: 
  593: kernel_fi=kernl${wordsize}${bytesex}.fi
  594: AC_SUBST(kernel_fi)
  595: 
  596: #this breaks bindists
  597: #dnl replace srource directory by absolute value
  598: #if test $srcdir = "."; then srcdir=`pwd` 
  599: #fi
  600: 
  601: AC_SUBST(machine)
  602: AC_CONFIG_FILES([
  603: Makefile
  604: Makedist
  605: gforthmi
  606: vmgen
  607: machpc.fs
  608: engine/Makefile
  609: doc/version.texi ])
  610: AC_CONFIG_COMMANDS([stamp-h],[[echo timestamp > stamp-h
  611: chmod +x gforthmi
  612: chmod +x vmgen
  613: test -d kernel||mkdir kernel]],[[]])
  614: AC_OUTPUT
  615: 

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