Annotation of gforth/configure.in, revision 1.150

1.1       anton       1: dnl Process this file with autoconf to produce a configure script.
1.20      anton       2: 
1.143     anton       3: #Copyright (C) 1995,1996,1997,1998,2000,2003,2004 Free Software Foundation, Inc.
1.20      anton       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
1.74      anton      19: #Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.20      anton      20: 
1.121     anton      21: 
1.34      anton      22: dnl We use some automake macros here,
                     23: dnl but don't use automake for creating Makefile.in
1.136     anton      24: AC_INIT([gforth],[0.6.2-20030910],[https://savannah.gnu.org/bugs/?func=addbug&group=gforth])
1.113     anton      25: AC_PREREQ(2.54)
1.47      anton      26: #snapshots have numbers major.minor.release-YYYYMMDD
1.92      anton      27: #note that lexicographic ordering must be heeded.
1.47      anton      28: #I.e., 0.4.1-YYYYMMDD must not exist before 0.4.1!
1.136     anton      29: UPDATED="September 10, 2003"
1.84      anton      30: AC_SUBST(UPDATED)
1.94      anton      31: AC_CONFIG_HEADERS(engine/config.h)
1.14      anton      32: 
1.121     anton      33: #suppress the "-g -O2" default
                     34: test "$CFLAGS" || CFLAGS=-O2
                     35: 
1.1       anton      36: AC_ARG_ENABLE(force-reg,
1.149     anton      37:        AC_HELP_STRING([--enable-force-reg],
                     38:                        [ Use explicit register declarations if they appear in
1.1       anton      39:                          the machine.h file. This can cause a good speedup,
                     40:                          but also incorrect code with some gcc versions on
1.149     anton      41:                          some processors (default disabled).]),
                     42:        ,enable_force_reg=no)
                     43: test "$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: 
1.145     pazsan     46: AC_ARG_ENABLE(force-ll,
1.149     anton      47:        AC_HELP_STRING([--enable-force-ll],
                     48:                       [  Use explicit long long declarations if they appear in
1.145     pazsan     49:                          the machine.h file. This can cause a good speedup,
                     50:                          but also incorrect code with some gcc versions on
1.149     anton      51:                          some processors (default disabled).]),
                     52:        ,enable_force_ll=no)
                     53: test "$enable_force_ll" = "no"||
                     54:   AC_DEFINE(FORCE_LL,,[Define if you want to use explicit long long declarations for better performance (does not work with all GCC versions on all machines)])
1.147     anton      55: 
                     56: AC_ARG_ENABLE(gcc-pr15242-workaround,
                     57:               AC_HELP_STRING([--disable-gcc-pr15242-workaround],[Disables
                     58:                              dynamic code generation on some versions of gcc
                     59:                              (slowdown~2 on Athlon) and causes slower building
                     60:                              of gforth (but gforth speedups) on others.
                     61:                              (default enabled)]),
                     62:                ,enable_gcc_pr15242_workaround=yes)
                     63: test "$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: 
1.150   ! pazsan     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 "$enable_force_cdiv" = "no"||
        !            73:   AC_DEFINE(FORCE_CDIV,,[Define if you want to use explicit symmetric division for better performance])
        !            74: 
1.149     anton      75: AC_SUBST(PROFEXES)
                     76: AC_SUBST(PROFOBJS)
1.135     anton      77: AC_ARG_ENABLE(prof,
1.149     anton      78:        AC_HELP_STRING([--enable-prof],
                     79:                        [ Build gforth-prof, which outputs frequently occuring
                     80:                           sequences of primitives.]),
                     81:        ,enable_prof=no)
                     82: if test "$enable_prof" = "no"; then
                     83:   PROFEXES="gforth-prof\$(EXE)"; PROFOBJS="engine-prof.o main-prof.o profile.o"
                     84: fi
1.1       anton      85: 
1.9       pazsan     86: AC_ARG_WITH(debug,
1.122     pazsan     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.],
1.9       pazsan     91: if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
1.122     pazsan     92: 
1.104     anton      93: dnl PEEPHOLE="yes"
                     94: dnl AC_ARG_WITH(peephole,
                     95: dnl [  --with-peephole Enable peephole optimization (default)
                     96: dnl   --without-peephole       disables peephole optimization. Creates smaller,
                     97: dnl                    but slower images.],
                     98: dnl PEEPHOLE="$withval")
                     99: 
                    100: #variables mentioned in INSTALL
1.123     anton     101: AC_ARG_VAR(CC, [The C compiler (must support GNU C 2.x); gcc-2.95 recommended.])
1.104     anton     102: AC_ARG_VAR(FORTHSIZES, [Gforth command line options for the default stack and dictionary sizes (see INSTALL).])
                    103: AC_ARG_VAR(ac_cv_sizeof_char_p, [sizeof(char *)])
                    104: AC_ARG_VAR(ac_cv_sizeof_char, [sizeof(char)])
                    105: AC_ARG_VAR(ac_cv_sizeof_short, [sizeof(short)])
                    106: AC_ARG_VAR(ac_cv_sizeof_int, [sizeof(int)])
                    107: AC_ARG_VAR(ac_cv_sizeof_long, [sizeof(long)])
                    108: AC_ARG_VAR(ac_cv_sizeof_long_long, [sizeof(long long)])
                    109: AC_ARG_VAR(ac_cv_sizeof_intptr_t, [sizeof(intptr_t)])
                    110: AC_ARG_VAR(ac_cv_sizeof_int128_t, [sizeof(int128_t)])
1.144     pazsan    111: AC_ARG_VAR(ac_cv_sizeof_uint128_t, [sizeof(uint128_t)])
1.123     anton     112: AC_ARG_VAR(ac_cv_c_bigendian, [Is the target big-endian ("yes" or "no")?])
                    113: AC_ARG_VAR(no_dynamic_default, [run gforth with --dynamic (0) or --no-dynamic (1) by default])
1.136     anton     114: AC_ARG_VAR(skip_code, [assembly code for skipping 16 bytes of code])
1.82      anton     115: 
1.96      anton     116: #set up feature test macros, so the tests get them right:
                    117: # turn on all POSIX, SUSv3, and GNU features if available
1.97      anton     118: AC_GNU_SOURCE
                    119: dnl AC_DEFINE_UNQUOTED([_GNU_SOURCE],1,[feature test macro])
                    120: 
                    121: dnl Don't define _POSIX_SOURCE etc. because some OSs (in particular
                    122: dnl MacOSX) disable some features then (MacOSX checks for _POSIX_SOURCE,
                    123: dnl but not for _XOPEN_SOURCE)
                    124: dnl AC_DEFINE_UNQUOTED([_POSIX_SOURCE],1,[feature test macro])
                    125: dnl AC_DEFINE_UNQUOTED([_POSIX_C_SOURCE],199506L,[feature test macro])
                    126: dnl AC_DEFINE_UNQUOTED([_XOPEN_SOURCE],600,[feature test macro])
1.96      anton     127: # turn on large file support with 64-bit off_t where available
1.105     anton     128: AC_SYS_LARGEFILE
                    129: dnl AC_DEFINE_UNQUOTED([_LARGEFILE_SOURCE],1,[feature test macro])
                    130: dnl AC_DEFINE_UNQUOTED([_FILE_OFFSET_BITS],64,[feature test macro])
1.96      anton     131: 
1.82      anton     132: #currently we force direct threading this way.  Eventually we should
                    133: #setup in the arch and engine files right
1.16      anton     134: 
1.15      pazsan    135: AC_PROG_CC
                    136: 
1.92      anton     137: test "$GCC" = "yes" || AC_MSG_ERROR(Gforth uses GNU C extensions and requires GCC 2.0 or higher)
1.9       pazsan    138: 
1.15      pazsan    139: AC_SUBST(CC)
1.9       pazsan    140: AC_SUBST(DEBUGFLAG)
1.7       anton     141: 
1.128     pazsan    142: AC_MSG_CHECKING(make type)
                    143: make_type=`make -v 2>&1|grep 'ake version'|sed 's/ version .*//'`
                    144: 
                    145: GNUMAKE='#'
                    146: test "$make_type" = "GNU Make" && GNUMAKE=''
                    147: 
                    148: AC_MSG_RESULT($make_type)
                    149: 
                    150: AC_SUBST(GNUMAKE)
                    151: 
1.50      jwilke    152: AC_MSG_CHECKING([whether the linker accepts -export-dynamic])
                    153: OLDLDFLAGS=$LDFLAGS
                    154: LDFLAGS="$LDFLAGS -export-dynamic"
1.69      anton     155: dnl AC_TRY_LINK gives false positive on rs6000-ibm-aix4.2.1.0
                    156: dnl AC_TRY_LINK(,,ac_export_dynamic=yes,ac_export_dynamic=no)
                    157: AC_TRY_RUN(main(){exit(0);},ac_export_dynamic=yes,ac_export_dynamic=no,ac_export_dynamic=no)
1.50      jwilke    158: test $ac_export_dynamic = yes|| LDFLAGS=$OLDLDFLAGS
                    159: AC_MSG_RESULT($ac_export_dynamic)
                    160: 
1.1       anton     161: #terminology is a bit unusual here: The host is the system on which
                    162: #gforth will run; the system on which configure will run is the `build'
                    163: AC_CANONICAL_HOST
                    164: case "$host_cpu" in
1.136     anton     165:        arm*)
                    166:                machine=arm
                    167:                CFLAGS="$CFLAGS -fomit-frame-pointer"
                    168:                if test -z $no_dynamic_default; then
                    169:                    no_dynamic_default=1
                    170:                    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
                    171:                fi
                    172:                ;;
1.1       anton     173:        hppa*)
1.34      anton     174:                machine=hppa
1.46      anton     175:                $srcdir/mkinstalldirs arch/hppa
1.87      pazsan    176:                AC_LIBOBJ(../arch/hppa/cache)
1.134     anton     177:                #-N needed for --dynamic <M4U3b.3790$9d.317@news.cpqcorp.net>
                    178:                LDFLAGS="$LDFLAGS -Xlinker -N"
1.47      anton     179:                LIBS="$LIBS -L/lib/pa1.1/"
1.1       anton     180:                ;;
                    181:        sparc*)
1.34      anton     182:                machine=sparc
1.1       anton     183:                ;;
1.31      anton     184:        i386)
1.34      anton     185:                machine=386
1.16      anton     186:                CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
1.31      anton     187:                ;;
                    188:        i486)
1.34      anton     189:                machine=386
1.31      anton     190:                CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem -m486"
                    191:                ;;
1.77      anton     192:        i*86)
1.34      anton     193:                machine=386
1.55      anton     194:                CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
1.56      pazsan    195:                CFLAGS_1="$CFLAGS"
1.87      pazsan    196:                CFLAGS="$CFLAGS -march=pentium"
1.56      pazsan    197:                AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1 -m486")
1.1       anton     198:                ;;
1.133     anton     199:        x86_64)
                    200:                machine=amd64
                    201:                ;;
1.136     anton     202:        ia64*)
                    203:                machine=ia64
                    204:                AC_LIBOBJ(../arch/ia64/flush_icache_block)
                    205:                test "$skipcode" || skipcode="nop.i 0"
                    206:                #".skip 16" passes the test below,
                    207:                # but gives an assembler error in engine
                    208:                ;;
1.26      pazsan    209:         m68k)
1.34      anton     210:                machine=m68k
1.32      pazsan    211:                CFLAGS="$CFLAGS -fomit-frame-pointer"
                    212:                if test "$host_os" = "nextstep3"
                    213:                then
1.87      pazsan    214:                        AC_LIBOBJ(termios)
1.32      pazsan    215:                fi
1.26      pazsan    216:                ;;
1.1       anton     217:        mips*)
1.34      anton     218:                machine=mips
1.92      anton     219:                #dynamic native code has the following problems on MIPS:
                    220:                #
                    221:                #1) J/JAL seems relocatable, but is are only
                    222:                #relocatable within a 256MB-segment.  While we try to
                    223:                #get the linker to arrange this, there is no guarantee
                    224:                #that this will succeed (and if the user uses a lot of
                    225:                #memory, it is likely to fail).
                    226:                #
                    227:                #2) The way we generate dynamic native code may
                    228:                #violate MIPS architectural restrictions (in
                    229:                #particular, the delay slots of LW, MFLO, etc.)
                    230:                #
                    231:                #Therefore we disable dynamic native code by default:
1.136     anton     232:                if test -z $no_dynamic_default; then
                    233:                    no_dynamic_default=1
                    234:                    AC_MSG_WARN([Disabling default dynamic native code generation (relocation and delay slot issues)])
                    235:                fi
1.1       anton     236:                ;;
1.9       pazsan    237:        alpha*)
1.34      anton     238:                machine=alpha
1.58      anton     239:                #full IEEE FP support for more uniformity across platforms:
                    240:                CFLAGS="$CFLAGS -mieee"
1.9       pazsan    241:                ;;
1.69      anton     242:        power*|rs6000)
1.34      anton     243:                machine=power
1.46      anton     244:                $srcdir/mkinstalldirs arch/power
1.138     anton     245:                AC_CHECK_FUNC(_sync_cache_range,[true],[AC_LIBOBJ(../arch/power/_sync_cache_range)])
1.103     anton     246:                #long long is broken on (at least) gcc-2.95.* for PPC
1.104     anton     247:                test x$ac_cv_sizeof_long_long = x && ac_cv_sizeof_long_long=0
1.31      anton     248:                ;;
1.1       anton     249:        *)
1.92      anton     250:                AC_MSG_WARN([Using a generic machine description])
                    251:                AC_MSG_WARN([Assuming C floats and doubles are IEEE floats and doubles (for SF@ DF@ SF! DF!)])
                    252:                AC_MSG_WARN([FLUSH-ICACHE will do nothing, so END-CODE may not work properly!])
1.34      anton     253:                machine=generic
1.97      anton     254:                #I-cache flushing would be needed for dynamic code generation
1.136     anton     255:                if test -z $no_dynamic_default; then
                    256:                    no_dynamic_default=1
                    257:                    AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
                    258:                fi
1.1       anton     259: esac
1.10      anton     260: AC_SUBST(host)
1.146     pazsan    261: 
                    262: if test "${enable_force_ll+set}" = set; then
                    263:    ac_includes_default="$ac_includes_default
                    264: #include \"arch/generic/128bit.h\""
                    265: fi
1.103     anton     266: 
                    267: dnl the following macro produces a warning with autoconf-2.1
                    268: AC_CHECK_SIZEOF(char *)
                    269: case "$ac_cv_sizeof_char_p" in
                    270:   2)
                    271:     wordsize=16
                    272:     ;;
                    273:   4)
                    274:     wordsize=32
                    275:     ;;
                    276:   8)
                    277:     wordsize=64
                    278:     ;;
                    279: esac
                    280: 
                    281: AC_CHECK_SIZEOF(char)
                    282: AC_CHECK_SIZEOF(short)
                    283: AC_CHECK_SIZEOF(int)
                    284: AC_CHECK_SIZEOF(long)
                    285: AC_CHECK_SIZEOF(long long)
                    286: AC_CHECK_SIZEOF(intptr_t)
                    287: AC_CHECK_SIZEOF(int128_t)
1.144     pazsan    288: AC_CHECK_SIZEOF(uint128_t)
1.103     anton     289: 
                    290: AC_MSG_CHECKING([for a C type for cells])
                    291: ac_cv_int_type_cell=none
                    292: case "$ac_cv_sizeof_char_p" in
                    293:   $ac_cv_sizeof_int)
                    294:     ac_cv_int_type_cell=int
                    295:     ;;
                    296:   $ac_cv_sizeof_short)
                    297:     ac_cv_int_type_cell=short
                    298:     ;;
                    299:   $ac_cv_sizeof_char)
                    300:     ac_cv_int_type_cell=char
                    301:     ;;
                    302:   $ac_cv_sizeof_long)
                    303:     ac_cv_int_type_cell=long
                    304:     ;;
                    305:   $ac_cv_sizeof_long_long)
                    306:     ac_cv_int_type_cell="long long"
                    307:     ;;
                    308:   $ac_cv_sizeof_intptr_t)
                    309:     ac_cv_int_type_cell="intptr_t"
                    310:     ;;
                    311:   $ac_cv_sizeof_int128_t)
                    312:     ac_cv_int_type_cell="int128_t"
                    313:     ;;
                    314: esac
                    315: AC_MSG_RESULT($ac_cv_int_type_cell)
                    316: AC_DEFINE_UNQUOTED(CELL_TYPE,$ac_cv_int_type_cell,[an integer type that is as long as a pointer])
                    317: 
                    318: AC_MSG_CHECKING([for a C type for double-cells])
                    319: ac_cv_int_type_double_cell=none
                    320: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
                    321:   $ac_cv_sizeof_short)
                    322:     ac_cv_int_type_double_cell=short
                    323:     ;;
                    324:   $ac_cv_sizeof_int)
                    325:     ac_cv_int_type_double_cell=int
                    326:     ;;
                    327:   $ac_cv_sizeof_long)
                    328:     ac_cv_int_type_double_cell=long
                    329:     ;;
                    330:   $ac_cv_sizeof_long_long)
                    331:     ac_cv_int_type_double_cell="long long"
                    332:     ;;
                    333:   $ac_cv_sizeof_intptr_t)
                    334:     ac_cv_int_type_double_cell="intptr_t"
                    335:     ;;
                    336:   $ac_cv_sizeof_int128_t)
                    337:     ac_cv_int_type_double_cell="int128_t"
                    338:     ;;
                    339: esac
                    340: AC_MSG_RESULT($ac_cv_int_type_double_cell)
1.144     pazsan    341: 
                    342: AC_MSG_CHECKING([for a C type for unsigned double-cells])
                    343: ac_cv_int_type_double_ucell=none
                    344: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
                    345:   $ac_cv_sizeof_short)
                    346:     ac_cv_int_type_double_ucell="unsigned short"
                    347:     ;;
                    348:   $ac_cv_sizeof_int)
                    349:     ac_cv_int_type_double_ucell="unsigned int"
                    350:     ;;
                    351:   $ac_cv_sizeof_long)
                    352:     ac_cv_int_type_double_ucell="unsigned long"
                    353:     ;;
                    354:   $ac_cv_sizeof_long_long)
                    355:     ac_cv_int_type_double_ucell="unsigned long long"
                    356:     ;;
                    357:   $ac_cv_sizeof_intptr_t)
                    358:     ac_cv_int_type_double_ucell="unsigned intptr_t"
                    359:     ;;
                    360:   $ac_cv_sizeof_uint128_t)
                    361:     ac_cv_int_type_double_ucell="uint128_t"
                    362:     ;;
                    363: esac
                    364: AC_MSG_RESULT($ac_cv_int_type_double_ucell)
                    365: 
                    366: if test "$ac_cv_int_type_double_cell" = none || \
                    367:    test "$ac_cv_int_type_double_ucell" = none
                    368: then
1.103     anton     369:        AC_MSG_WARN([Emulating double-cell arithmetic. This may be slow.])
                    370:        AC_LIBOBJ(dblsub)
                    371:        AC_DEFINE(BUGGY_LONG_LONG,,[define this if there is no working DOUBLE_CELL_TYPE on your machine])
                    372: else
                    373:        AC_DEFINE_UNQUOTED(DOUBLE_CELL_TYPE,$ac_cv_int_type_double_cell,[an integer type that is twice as long as a pointer])
1.144     pazsan    374:        AC_DEFINE_UNQUOTED(DOUBLE_UCELL_TYPE,$ac_cv_int_type_double_ucell,[an unsigned integer type that is twice as long as a pointer])
1.103     anton     375: fi
                    376: 
                    377: AC_TYPE_OFF_T
                    378: AC_CHECK_SIZEOF(off_t)
                    379: test $ac_cv_sizeof_off_t -gt $ac_cv_sizeof_char_p
                    380: ac_small_off_t=$?
                    381: AC_DEFINE_UNQUOTED(SMALL_OFF_T,$ac_small_off_t,[1 if off_t fits in a Cell])
1.1       anton     382: 
1.109     anton     383: ENGINE_FLAGS=
                    384: AC_SUBST(ENGINE_FLAGS)
                    385: 
                    386: # Try if GCC understands -fno-gcse
                    387: 
                    388: AC_MSG_CHECKING([if $CC understands -fno-gcse])
                    389: CFLAGS_1="$CFLAGS"
                    390: CFLAGS="$CFLAGS -fno-gcse"
                    391: AC_TRY_COMPILE(,,ac_nogcse=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-gcse",ac_nogcse=no)
                    392: CFLAGS="$CFLAGS_1"
                    393: AC_MSG_RESULT($ac_nogcse)
                    394: 
                    395: # Try if GCC understands -fno-strict-aliasing
                    396: AC_MSG_CHECKING([if $CC understands -fno-strict-aliasing])
                    397: CFLAGS_1="$CFLAGS"
                    398: CFLAGS="$CFLAGS -fno-strict-aliasing"
                    399: AC_TRY_COMPILE(,,ac_nostrictaliasing=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-strict-aliasing",ac_nostrictaliasing=no)
                    400: CFLAGS="$CFLAGS_1"
                    401: AC_MSG_RESULT($ac_nostrictaliasing)
                    402: 
1.123     anton     403: # Try if GCC understands -fno-crossjumping
                    404: AC_MSG_CHECKING([if $CC understands -fno-crossjumping])
1.88      pazsan    405: CFLAGS_1="$CFLAGS"
1.123     anton     406: CFLAGS="$CFLAGS -fno-crossjumping"
1.125     anton     407: AC_TRY_COMPILE(,,ac_nocrossjumping=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-crossjumping",ac_nocrossjumping=no)
1.109     anton     408: CFLAGS="$CFLAGS_1"
1.124     pazsan    409: AC_MSG_RESULT($ac_nocrossjumping)
1.88      pazsan    410: 
1.137     pazsan    411: # Try if GCC understands -fno-reorder-blocks
                    412: AC_MSG_CHECKING([if $CC understands -fno-reorder-blocks])
                    413: CFLAGS_1="$CFLAGS"
                    414: CFLAGS="$CFLAGS -fno-reorder-blocks"
                    415: AC_TRY_COMPILE(,,ac_noreorder_blocks=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-reorder-blocks",ac_noreorder_blocks=no)
                    416: CFLAGS="$CFLAGS_1"
                    417: AC_MSG_RESULT($ac_noreorder_blocks)
                    418: 
1.130     anton     419: # Try if GCC understands __attribute__((unused))
                    420: AC_MSG_CHECKING([how to suppress 'unused variable' warnings])
                    421: AC_TRY_COMPILE(,[int __attribute__((unused)) foo;], MAYBE_UNUSED='__attribute__((unused))',)
                    422: AC_DEFINE_UNQUOTED(MAYBE_UNUSED,$MAYBE_UNUSED,[attribute for possibly unused variables])
                    423: AC_MSG_RESULT($MAYBE_UNUSED)
                    424: 
1.66      anton     425: AC_CHECK_PROG(asm_fs,asm.fs,arch/$machine/asm.fs,,$srcdir/arch/$machine)
1.61      anton     426: AC_SUBST(asm_fs)
                    427: 
1.66      anton     428: AC_CHECK_PROG(disasm_fs,disasm.fs,arch/$machine/disasm.fs,,$srcdir/arch/$machine)
1.61      anton     429: AC_SUBST(disasm_fs)
                    430: 
1.116     anton     431: AC_PATH_PROG(INSTALL_INFO,install-info,[echo '>>>>Please make info dir entry:'],$PATH:/sbin:/usr/sbin:/usr/local/sbin)
1.114     anton     432: 
1.39      pazsan    433: case "$host_os" in
1.107     anton     434:        *win32|cygwin)
1.108     anton     435:                DIRSEP="\\\\"
1.127     anton     436:                PATHSEP=";"
1.142     anton     437:                #we want the builtins of command.com/cmd.exe and its
                    438:                # handling of .com files.
                    439:                #$COMSPEC contains the name of the Windows shell;
                    440:                # the ./ is there, because the bash does not recognize
                    441:                # absolute DOS filenames
                    442:                DEFAULTSYSTEMPREFIX="./$COMSPEC /c "
1.39      pazsan    443:                ;;
1.97      anton     444:        *darwin*)
                    445:                #Darwin uses some funny preprocessor by default; eliminate it:
1.127     anton     446:                AC_MSG_NOTICE([using -no-cpp-precomp on Darwin])
1.120     anton     447:                CFLAGS="$CFLAGS -no-cpp-precomp"
1.98      anton     448:                DIRSEP="/"
1.127     anton     449:                PATHSEP=":"
1.141     anton     450:                DEFAULTSYSTEMPREFIX=""
1.98      anton     451:                ;;
1.39      pazsan    452:        *)
1.88      pazsan    453:                DIRSEP="/"
1.127     anton     454:                PATHSEP=":"
1.141     anton     455:                DEFAULTSYSTEMPREFIX=""
1.39      pazsan    456:                ;;
                    457: esac
1.88      pazsan    458: AC_SUBST(DIRSEP)
1.89      pazsan    459: AC_DEFINE_UNQUOTED(DIRSEP,'$DIRSEP',[a directory separator character])
1.127     anton     460: AC_SUBST(PATHSEP)
                    461: AC_DEFINE_UNQUOTED(PATHSEP,'$PATHSEP',[a path separator character])
1.141     anton     462: AC_SUBST(DEFAULTSYSTEMPREFIX)
                    463: AC_DEFINE_UNQUOTED(DEFAULTSYSTEMPREFIX,"$DEFAULTSYSTEMPREFIX",[default for environment variable GFORTHSYSTEMPREFIX])
1.39      pazsan    464: 
1.1       anton     465: dnl Now a little support for DOS/DJGCC
1.30      pazsan    466: AC_SUBST(GFORTH_EXE)
                    467: GFORTH_EXE=""
1.48      anton     468: AC_SUBST(GFORTHFAST_EXE)
                    469: GFORTHFAST_EXE=""
1.83      anton     470: AC_SUBST(GFORTHITC_EXE)
                    471: GFORTHITC_EXE=""
1.30      pazsan    472: AC_SUBST(GFORTHDITC_EXE)
                    473: GFORTHDITC_EXE=""
1.27      anton     474: 
                    475: AC_SUBST(FORTHSIZES)
1.24      anton     476: 
1.104     anton     477: dnl if test "$PEEPHOLE" = "yes"
                    478: dnl then
                    479: dnl    PEEPHOLEFLAG="true"
                    480: dnl    AC_DEFINE(HAS_PEEPHOLE,,[Define if you want to use peephole optimization])
                    481: dnl else
                    482: dnl    PEEPHOLEFLAG="false"
                    483: dnl fi
                    484: PEEPHOLEFLAG="true"
1.79      pazsan    485: AC_SUBST(PEEPHOLEFLAG)
                    486: 
1.1       anton     487: dnl copy commands for systems that don't have links
1.29      pazsan    488: AC_SUBST(LINK_KERNL)
                    489: LINK_KERNL=""
1.1       anton     490: 
                    491: #if test $host_os=dos
                    492: #then
                    493: #  echo Configuring for DOS!!!
                    494: #  MAKE_EXE="coff2exe gforth"
1.29      pazsan    495: #  LINK_KERNL='$(CP) kernl32l.fi kernel.fi'
1.1       anton     496: #fi
                    497: 
                    498: dnl the following macro produces a warning with autoconf-2.1
                    499: AC_C_BIGENDIAN
1.23      pazsan    500: AC_SUBST(KERNEL)
1.1       anton     501: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
                    502: if test $ac_cv_c_bigendian = yes; then
                    503:   bytesex=b
1.23      pazsan    504:   KERNEL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
1.1       anton     505: else
                    506:   bytesex=l
1.23      pazsan    507:   KERNEL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
1.1       anton     508: fi
                    509: 
1.91      anton     510: #check how to do asm(".skip 16")
1.148     anton     511: echo "CFLAGS=$CFLAGS"
                    512: echo "ac_link=$ac_link"
1.92      anton     513: AC_MSG_CHECKING([if and how we can waste code space])
1.136     anton     514: if test -z "$skipcode"; then
1.148     anton     515:     skipcode=no
                    516:     CFLAGS_1="$CFLAGS"
                    517:     CFLAGS="$CFLAGS $ENGINE_FLAGS"
1.136     anton     518:     for i in ".skip 16" ".block 16" ".org .+16" ".=.+16" ".space 16"
                    519:     do
1.91      anton     520:        AC_TRY_RUN(
1.136     anton     521: [int foo(int,int,int);
1.91      anton     522: main()
                    523: {
1.136     anton     524:   exit(foo(0,0,0)!=16);
1.91      anton     525: }
1.136     anton     526: int foo(int x, int y, int z)
1.91      anton     527: {
1.136     anton     528:   static void *labels[]={&&label1, &&label2};
1.91      anton     529:   if (x) {
1.136     anton     530:     y++; /* workaround for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12108 */
1.91      anton     531:   label1:
1.148     anton     532:     asm("$i"); /* or ".space 16" or somesuch */
1.136     anton     533:   label2: ;
                    534:   }
                    535:   {
                    536:   if (y) goto *labels[z]; /* workaround for gcc PR12108 */
                    537:   return labels[1]-labels[0];
1.91      anton     538:   }
1.136     anton     539: }]
1.92      anton     540:        ,skipcode=$i; break
                    541:        ,,)
1.136     anton     542:     done
1.148     anton     543:     CFLAGS=$CFLAGS_1
1.136     anton     544: fi
1.92      anton     545: AC_MSG_RESULT($skipcode)
                    546: if test "$skipcode" = no
                    547: then 
1.136     anton     548:     if test -z $no_dynamic_default; then
                    549:        no_dynamic_default=1
                    550:        AC_MSG_WARN(Disabling default dynamic native code generation)
                    551:     fi
1.92      anton     552:     AC_DEFINE_UNQUOTED(SKIP16,((void)0),statement for skipping 16 bytes)
                    553: else
                    554:     AC_DEFINE_UNQUOTED(SKIP16,asm("$skipcode"),statement for skipping 16 bytes)
                    555: fi
1.91      anton     556: 
1.136     anton     557: test "$no_dynamic_default" || no_dynamic_default=0
1.92      anton     558: AC_DEFINE_UNQUOTED(NO_DYNAMIC_DEFAULT,$no_dynamic_default,default value for no_dynamic)
1.91      anton     559: 
1.1       anton     560: dnl Checks for programs.
                    561: AC_PROG_LN_S
1.95      anton     562: AC_PROG_INSTALL
1.1       anton     563: 
                    564: dnl Checks for library functions
1.2       anton     565: dnl This check is just for making later checks link with libm.
                    566: dnl using sin here is no good idea since it is built-into gcc and typechecked
                    567: AC_CHECK_LIB(m,asin)
1.31      anton     568: AC_CHECK_LIB(dl,dlopen)
1.124     pazsan    569: dnl check for ffcall libraries
                    570: dnl unfortunately, these four calls are separated out into a library each.
                    571: AC_CHECK_LIB(avcall,__builtin_avcall)
                    572: AC_CHECK_LIB(callback,__vacall_r)
                    573: AC_CHECK_LIB(vacall,vacall)
                    574: AC_CHECK_LIB(trampoline,alloc_trampoline)
1.125     anton     575: FFCALLFLAG="false"
1.129     pazsan    576: OLDCALLFLAG="true"
                    577: 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])
                    578: test $ac_cv_lib_avcall___builtin_avcall = no && AC_DEFINE(HAS_OLDCALL,,[define this if you want to use the old call libraries])
1.125     anton     579: AC_SUBST(FFCALLFLAG)
1.129     pazsan    580: AC_SUBST(OLDCALLFLAG)
1.32      pazsan    581: if test "$host_os" != "nextstep3"
                    582: then
                    583:        AC_FUNC_MEMCMP
                    584: fi
1.25      pazsan    585: AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal atanh)
1.97      anton     586: AC_FUNC_FSEEKO
                    587: AC_CHECK_FUNCS(ftello dlopen sys_siglist getrusage)
1.111     anton     588: AC_CHECK_TYPES(stack_t,,,[#include <signal.h>])
1.19      anton     589: AC_DECL_SYS_SIGLIST
1.138     anton     590: AC_CHECK_FUNC(getopt_long,[true],[AC_LIBOBJ(getopt) AC_LIBOBJ(getopt1)])
1.90      anton     591: AC_CHECK_FUNCS(expm1 log1p)
                    592: AC_REPLACE_FUNCS(rint ecvt)
1.1       anton     593: dnl No check for select, because our replacement is no good under
                    594: dnl anything but DOS
1.62      anton     595: AC_CHECK_HEADERS(sys/mman.h fnmatch.h)
1.63      anton     596: AC_FUNC_FNMATCH
1.87      pazsan    597: test $ac_cv_func_fnmatch_works = yes || AC_LIBOBJ(fnmatch)
1.28      anton     598: AC_CHECK_FUNCS(mmap sysconf getpagesize)
1.34      anton     599: AM_PATH_LISPDIR
1.1       anton     600: 
1.23      pazsan    601: kernel_fi=kernl${wordsize}${bytesex}.fi
                    602: AC_SUBST(kernel_fi)
1.50      jwilke    603: 
1.76      anton     604: #this breaks bindists
                    605: #dnl replace srource directory by absolute value
                    606: #if test $srcdir = "."; then srcdir=`pwd` 
                    607: #fi
1.8       anton     608: 
1.34      anton     609: AC_SUBST(machine)
1.95      anton     610: AC_CONFIG_FILES([
1.31      anton     611: Makefile
1.45      pazsan    612: Makedist
1.43      anton     613: gforthmi
1.80      anton     614: vmgen
1.79      pazsan    615: machpc.fs
1.35      anton     616: engine/Makefile
1.95      anton     617: doc/version.texi ])
                    618: AC_CONFIG_COMMANDS([stamp-h],[[echo timestamp > stamp-h
1.43      anton     619: chmod +x gforthmi
1.80      anton     620: chmod +x vmgen
1.95      anton     621: test -d kernel||mkdir kernel]],[[]])
                    622: AC_OUTPUT
1.44      anton     623: 

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