Annotation of gforth/configure.in, revision 1.131

1.1       anton       1: dnl Process this file with autoconf to produce a configure script.
1.20      anton       2: 
1.117     anton       3: #Copyright (C) 1995,1996,1997,1998,2000,2003 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
1.127     anton      24: AC_INIT([gforth],[0.6.1-20030806],[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!
1.127     anton      29: UPDATED="August 6, 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 "$CFLAGS" || CFLAGS=-O2
                     35: 
1.92      anton      36: #default setting that may be changed later:
1.123     anton      37: test "$no_dynamic_default" || no_dynamic_default=0
1.92      anton      38: 
1.1       anton      39: AC_ARG_ENABLE(force-reg,
                     40: [  --enable-force-reg    Use explicit register declarations if they appear in
                     41:                          the machine.h file. This can cause a good speedup,
                     42:                          but also incorrect code with some gcc versions on
                     43:                          some processors (default disabled).],
1.89      pazsan     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)]))
1.1       anton      45: 
1.9       pazsan     46: AC_ARG_WITH(debug,
1.122     pazsan     47: [  --with-debug                  specifies option -g to compile with debug info
                     48:   --without-debug        omits the -g switch and creates smaller images on
                     49:                          machines where "strip" has problems with gcc style
                     50:                          debugging informations.],
1.9       pazsan     51: if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
1.122     pazsan     52: 
1.104     anton      53: dnl PEEPHOLE="yes"
                     54: dnl AC_ARG_WITH(peephole,
                     55: dnl [  --with-peephole Enable peephole optimization (default)
                     56: dnl   --without-peephole       disables peephole optimization. Creates smaller,
                     57: dnl                    but slower images.],
                     58: dnl PEEPHOLE="$withval")
                     59: 
                     60: #variables mentioned in INSTALL
1.123     anton      61: AC_ARG_VAR(CC, [The C compiler (must support GNU C 2.x); gcc-2.95 recommended.])
1.104     anton      62: AC_ARG_VAR(FORTHSIZES, [Gforth command line options for the default stack and dictionary sizes (see INSTALL).])
                     63: AC_ARG_VAR(ac_cv_sizeof_char_p, [sizeof(char *)])
                     64: AC_ARG_VAR(ac_cv_sizeof_char, [sizeof(char)])
                     65: AC_ARG_VAR(ac_cv_sizeof_short, [sizeof(short)])
                     66: AC_ARG_VAR(ac_cv_sizeof_int, [sizeof(int)])
                     67: AC_ARG_VAR(ac_cv_sizeof_long, [sizeof(long)])
                     68: AC_ARG_VAR(ac_cv_sizeof_long_long, [sizeof(long long)])
                     69: AC_ARG_VAR(ac_cv_sizeof_intptr_t, [sizeof(intptr_t)])
                     70: AC_ARG_VAR(ac_cv_sizeof_int128_t, [sizeof(int128_t)])
1.123     anton      71: AC_ARG_VAR(ac_cv_c_bigendian, [Is the target big-endian ("yes" or "no")?])
                     72: AC_ARG_VAR(no_dynamic_default, [run gforth with --dynamic (0) or --no-dynamic (1) by default])
1.82      anton      73: 
1.96      anton      74: #set up feature test macros, so the tests get them right:
                     75: # turn on all POSIX, SUSv3, and GNU features if available
1.97      anton      76: AC_GNU_SOURCE
                     77: dnl AC_DEFINE_UNQUOTED([_GNU_SOURCE],1,[feature test macro])
                     78: 
                     79: dnl Don't define _POSIX_SOURCE etc. because some OSs (in particular
                     80: dnl MacOSX) disable some features then (MacOSX checks for _POSIX_SOURCE,
                     81: dnl but not for _XOPEN_SOURCE)
                     82: dnl AC_DEFINE_UNQUOTED([_POSIX_SOURCE],1,[feature test macro])
                     83: dnl AC_DEFINE_UNQUOTED([_POSIX_C_SOURCE],199506L,[feature test macro])
                     84: dnl AC_DEFINE_UNQUOTED([_XOPEN_SOURCE],600,[feature test macro])
1.96      anton      85: # turn on large file support with 64-bit off_t where available
1.105     anton      86: AC_SYS_LARGEFILE
                     87: dnl AC_DEFINE_UNQUOTED([_LARGEFILE_SOURCE],1,[feature test macro])
                     88: dnl AC_DEFINE_UNQUOTED([_FILE_OFFSET_BITS],64,[feature test macro])
1.96      anton      89: 
1.82      anton      90: #currently we force direct threading this way.  Eventually we should
                     91: #setup in the arch and engine files right
1.16      anton      92: 
1.15      pazsan     93: AC_PROG_CC
                     94: 
1.92      anton      95: test "$GCC" = "yes" || AC_MSG_ERROR(Gforth uses GNU C extensions and requires GCC 2.0 or higher)
1.9       pazsan     96: 
1.15      pazsan     97: AC_SUBST(CC)
1.9       pazsan     98: AC_SUBST(DEBUGFLAG)
1.7       anton      99: 
1.128     pazsan    100: AC_MSG_CHECKING(make type)
                    101: make_type=`make -v 2>&1|grep 'ake version'|sed 's/ version .*//'`
                    102: 
                    103: GNUMAKE='#'
                    104: test "$make_type" = "GNU Make" && GNUMAKE=''
                    105: 
                    106: AC_MSG_RESULT($make_type)
                    107: 
                    108: AC_SUBST(GNUMAKE)
                    109: 
1.97      anton     110: dnl gcc-3.2 seems to work fine now
                    111: dnl AC_MSG_CHECKING(gcc version)
                    112: dnl gcc_version=`$CC -v 2>&1|grep 'gcc version'|sed 's/.*gcc version //'`
                    113: dnl AC_MSG_RESULT($gcc_version)
                    114: dnl if expr "$gcc_version" \> 3.0.4 >/dev/null && expr "$gcc_version" \< 3.2.1 >/dev/null
                    115: dnl then
                    116: dnl    no_dynamic_default=1
                    117: dnl    AC_MSG_WARN(Disabling dynamic native code generation by default (speed penalty factor ~2))
                    118: dnl fi
1.92      anton     119: 
1.50      jwilke    120: AC_MSG_CHECKING([whether the linker accepts -export-dynamic])
                    121: OLDLDFLAGS=$LDFLAGS
                    122: LDFLAGS="$LDFLAGS -export-dynamic"
1.69      anton     123: dnl AC_TRY_LINK gives false positive on rs6000-ibm-aix4.2.1.0
                    124: dnl AC_TRY_LINK(,,ac_export_dynamic=yes,ac_export_dynamic=no)
                    125: AC_TRY_RUN(main(){exit(0);},ac_export_dynamic=yes,ac_export_dynamic=no,ac_export_dynamic=no)
1.50      jwilke    126: test $ac_export_dynamic = yes|| LDFLAGS=$OLDLDFLAGS
                    127: AC_MSG_RESULT($ac_export_dynamic)
                    128: 
1.1       anton     129: #terminology is a bit unusual here: The host is the system on which
                    130: #gforth will run; the system on which configure will run is the `build'
                    131: AC_CANONICAL_HOST
                    132: case "$host_cpu" in
                    133:        hppa*)
1.34      anton     134:                machine=hppa
1.46      anton     135:                $srcdir/mkinstalldirs arch/hppa
1.87      pazsan    136:                AC_LIBOBJ(../arch/hppa/cache)
1.110     anton     137:                #LDFLAGS="$LDFLAGS -Xlinker -N"
1.47      anton     138:                LIBS="$LIBS -L/lib/pa1.1/"
1.131   ! anton     139:                #executing dynamically generated code produced segfaults on
        !           140:                #the only HPPA machine that could waste code space, so
        !           141:                #disable it by default
        !           142:                no_dynamic_default=1
        !           143:                AC_MSG_WARN(Disabling dynamic native code generation by default (speed penalty factor ~2))
1.1       anton     144:                ;;
                    145:        sparc*)
1.34      anton     146:                machine=sparc
1.1       anton     147:                ;;
1.31      anton     148:        i386)
1.34      anton     149:                machine=386
1.16      anton     150:                CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
1.31      anton     151:                ;;
                    152:        i486)
1.34      anton     153:                machine=386
1.31      anton     154:                CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem -m486"
                    155:                ;;
1.77      anton     156:        i*86)
1.34      anton     157:                machine=386
1.55      anton     158:                CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
1.56      pazsan    159:                CFLAGS_1="$CFLAGS"
1.87      pazsan    160:                CFLAGS="$CFLAGS -march=pentium"
1.56      pazsan    161:                AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1 -m486")
1.1       anton     162:                ;;
1.97      anton     163: #generic should work for IA64
                    164: #      ia64*)
                    165: #              machine=ia64
                    166: #              ;;
1.26      pazsan    167:         m68k)
1.34      anton     168:                machine=m68k
1.32      pazsan    169:                CFLAGS="$CFLAGS -fomit-frame-pointer"
                    170:                if test "$host_os" = "nextstep3"
                    171:                then
1.87      pazsan    172:                        AC_LIBOBJ(termios)
1.32      pazsan    173:                fi
1.26      pazsan    174:                ;;
1.1       anton     175:        mips*)
1.34      anton     176:                machine=mips
1.92      anton     177:                #dynamic native code has the following problems on MIPS:
                    178:                #
                    179:                #1) J/JAL seems relocatable, but is are only
                    180:                #relocatable within a 256MB-segment.  While we try to
                    181:                #get the linker to arrange this, there is no guarantee
                    182:                #that this will succeed (and if the user uses a lot of
                    183:                #memory, it is likely to fail).
                    184:                #
                    185:                #2) The way we generate dynamic native code may
                    186:                #violate MIPS architectural restrictions (in
                    187:                #particular, the delay slots of LW, MFLO, etc.)
                    188:                #
                    189:                #Therefore we disable dynamic native code by default:
                    190:                no_dynamic_default=1
                    191:                AC_MSG_WARN(Disabling dynamic native code generation by default (speed penalty factor ~2))
1.1       anton     192:                ;;
1.9       pazsan    193:        alpha*)
1.34      anton     194:                machine=alpha
1.58      anton     195:                #full IEEE FP support for more uniformity across platforms:
                    196:                CFLAGS="$CFLAGS -mieee"
1.9       pazsan    197:                ;;
1.69      anton     198:        power*|rs6000)
1.34      anton     199:                machine=power
1.46      anton     200:                $srcdir/mkinstalldirs arch/power
1.87      pazsan    201:                AC_CHECK_FUNC(_sync_cache_range,true,AC_LIBOBJ(../arch/power/_sync_cache_range))
1.103     anton     202:                #long long is broken on (at least) gcc-2.95.* for PPC
1.104     anton     203:                test x$ac_cv_sizeof_long_long = x && ac_cv_sizeof_long_long=0
1.31      anton     204:                ;;
1.1       anton     205:        *)
1.92      anton     206:                AC_MSG_WARN([Using a generic machine description])
                    207:                AC_MSG_WARN([Assuming C floats and doubles are IEEE floats and doubles (for SF@ DF@ SF! DF!)])
                    208:                AC_MSG_WARN([FLUSH-ICACHE will do nothing, so END-CODE may not work properly!])
1.34      anton     209:                machine=generic
1.97      anton     210:                #I-cache flushing would be needed for dynamic code generation
                    211:                no_dynamic_default=1
                    212:                AC_MSG_WARN(Disabling dynamic native code generation by default (speed penalty factor ~2))
1.1       anton     213: esac
1.10      anton     214: AC_SUBST(host)
1.103     anton     215: 
                    216: dnl the following macro produces a warning with autoconf-2.1
                    217: AC_CHECK_SIZEOF(char *)
                    218: case "$ac_cv_sizeof_char_p" in
                    219:   2)
                    220:     wordsize=16
                    221:     ;;
                    222:   4)
                    223:     wordsize=32
                    224:     ;;
                    225:   8)
                    226:     wordsize=64
                    227:     ;;
                    228: esac
                    229: 
                    230: AC_CHECK_SIZEOF(char)
                    231: AC_CHECK_SIZEOF(short)
                    232: AC_CHECK_SIZEOF(int)
                    233: AC_CHECK_SIZEOF(long)
                    234: AC_CHECK_SIZEOF(long long)
                    235: AC_CHECK_SIZEOF(intptr_t)
                    236: AC_CHECK_SIZEOF(int128_t)
                    237: 
                    238: AC_MSG_CHECKING([for a C type for cells])
                    239: ac_cv_int_type_cell=none
                    240: case "$ac_cv_sizeof_char_p" in
                    241:   $ac_cv_sizeof_int)
                    242:     ac_cv_int_type_cell=int
                    243:     ;;
                    244:   $ac_cv_sizeof_short)
                    245:     ac_cv_int_type_cell=short
                    246:     ;;
                    247:   $ac_cv_sizeof_char)
                    248:     ac_cv_int_type_cell=char
                    249:     ;;
                    250:   $ac_cv_sizeof_long)
                    251:     ac_cv_int_type_cell=long
                    252:     ;;
                    253:   $ac_cv_sizeof_long_long)
                    254:     ac_cv_int_type_cell="long long"
                    255:     ;;
                    256:   $ac_cv_sizeof_intptr_t)
                    257:     ac_cv_int_type_cell="intptr_t"
                    258:     ;;
                    259:   $ac_cv_sizeof_int128_t)
                    260:     ac_cv_int_type_cell="int128_t"
                    261:     ;;
                    262: esac
                    263: AC_MSG_RESULT($ac_cv_int_type_cell)
                    264: AC_DEFINE_UNQUOTED(CELL_TYPE,$ac_cv_int_type_cell,[an integer type that is as long as a pointer])
                    265: 
                    266: AC_MSG_CHECKING([for a C type for double-cells])
                    267: ac_cv_int_type_double_cell=none
                    268: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
                    269:   $ac_cv_sizeof_short)
                    270:     ac_cv_int_type_double_cell=short
                    271:     ;;
                    272:   $ac_cv_sizeof_int)
                    273:     ac_cv_int_type_double_cell=int
                    274:     ;;
                    275:   $ac_cv_sizeof_long)
                    276:     ac_cv_int_type_double_cell=long
                    277:     ;;
                    278:   $ac_cv_sizeof_long_long)
                    279:     ac_cv_int_type_double_cell="long long"
                    280:     ;;
                    281:   $ac_cv_sizeof_intptr_t)
                    282:     ac_cv_int_type_double_cell="intptr_t"
                    283:     ;;
                    284:   $ac_cv_sizeof_int128_t)
                    285:     ac_cv_int_type_double_cell="int128_t"
                    286:     ;;
                    287: esac
                    288: AC_MSG_RESULT($ac_cv_int_type_double_cell)
                    289: if test "$ac_cv_int_type_double_cell" = none; then
                    290:        AC_MSG_WARN([Emulating double-cell arithmetic. This may be slow.])
                    291:        AC_LIBOBJ(dblsub)
                    292:        AC_DEFINE(BUGGY_LONG_LONG,,[define this if there is no working DOUBLE_CELL_TYPE on your machine])
                    293: else
                    294:        AC_DEFINE_UNQUOTED(DOUBLE_CELL_TYPE,$ac_cv_int_type_double_cell,[an integer type that is twice as long as a pointer])
                    295: fi
                    296: 
                    297: AC_TYPE_OFF_T
                    298: AC_CHECK_SIZEOF(off_t)
                    299: test $ac_cv_sizeof_off_t -gt $ac_cv_sizeof_char_p
                    300: ac_small_off_t=$?
                    301: AC_DEFINE_UNQUOTED(SMALL_OFF_T,$ac_small_off_t,[1 if off_t fits in a Cell])
1.1       anton     302: 
1.109     anton     303: ENGINE_FLAGS=
                    304: AC_SUBST(ENGINE_FLAGS)
                    305: 
                    306: # Try if GCC understands -fno-gcse
                    307: 
                    308: AC_MSG_CHECKING([if $CC understands -fno-gcse])
                    309: CFLAGS_1="$CFLAGS"
                    310: CFLAGS="$CFLAGS -fno-gcse"
                    311: AC_TRY_COMPILE(,,ac_nogcse=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-gcse",ac_nogcse=no)
                    312: CFLAGS="$CFLAGS_1"
                    313: AC_MSG_RESULT($ac_nogcse)
                    314: 
                    315: # Try if GCC understands -fno-strict-aliasing
                    316: AC_MSG_CHECKING([if $CC understands -fno-strict-aliasing])
                    317: CFLAGS_1="$CFLAGS"
                    318: CFLAGS="$CFLAGS -fno-strict-aliasing"
                    319: AC_TRY_COMPILE(,,ac_nostrictaliasing=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-strict-aliasing",ac_nostrictaliasing=no)
                    320: CFLAGS="$CFLAGS_1"
                    321: AC_MSG_RESULT($ac_nostrictaliasing)
                    322: 
1.123     anton     323: # Try if GCC understands -fno-crossjumping
                    324: AC_MSG_CHECKING([if $CC understands -fno-crossjumping])
1.88      pazsan    325: CFLAGS_1="$CFLAGS"
1.123     anton     326: CFLAGS="$CFLAGS -fno-crossjumping"
1.125     anton     327: AC_TRY_COMPILE(,,ac_nocrossjumping=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-crossjumping",ac_nocrossjumping=no)
1.109     anton     328: CFLAGS="$CFLAGS_1"
1.124     pazsan    329: AC_MSG_RESULT($ac_nocrossjumping)
1.88      pazsan    330: 
1.130     anton     331: # Try if GCC understands __attribute__((unused))
                    332: AC_MSG_CHECKING([how to suppress 'unused variable' warnings])
                    333: AC_TRY_COMPILE(,[int __attribute__((unused)) foo;], MAYBE_UNUSED='__attribute__((unused))',)
                    334: AC_DEFINE_UNQUOTED(MAYBE_UNUSED,$MAYBE_UNUSED,[attribute for possibly unused variables])
                    335: AC_MSG_RESULT($MAYBE_UNUSED)
                    336: 
1.66      anton     337: AC_CHECK_PROG(asm_fs,asm.fs,arch/$machine/asm.fs,,$srcdir/arch/$machine)
1.61      anton     338: AC_SUBST(asm_fs)
                    339: 
1.66      anton     340: AC_CHECK_PROG(disasm_fs,disasm.fs,arch/$machine/disasm.fs,,$srcdir/arch/$machine)
1.61      anton     341: AC_SUBST(disasm_fs)
                    342: 
1.116     anton     343: AC_PATH_PROG(INSTALL_INFO,install-info,[echo '>>>>Please make info dir entry:'],$PATH:/sbin:/usr/sbin:/usr/local/sbin)
1.114     anton     344: 
1.39      pazsan    345: case "$host_os" in
1.107     anton     346:        *win32|cygwin)
1.108     anton     347:                DIRSEP="\\\\"
1.127     anton     348:                PATHSEP=";"
1.39      pazsan    349:                ;;
1.97      anton     350:        *darwin*)
                    351:                #Darwin uses some funny preprocessor by default; eliminate it:
1.127     anton     352:                AC_MSG_NOTICE([using -no-cpp-precomp on Darwin])
1.120     anton     353:                CFLAGS="$CFLAGS -no-cpp-precomp"
1.98      anton     354:                DIRSEP="/"
1.127     anton     355:                PATHSEP=":"
1.98      anton     356:                ;;
1.39      pazsan    357:        *)
1.88      pazsan    358:                DIRSEP="/"
1.127     anton     359:                PATHSEP=":"
1.39      pazsan    360:                ;;
                    361: esac
1.88      pazsan    362: AC_SUBST(DIRSEP)
1.89      pazsan    363: AC_DEFINE_UNQUOTED(DIRSEP,'$DIRSEP',[a directory separator character])
1.127     anton     364: AC_SUBST(PATHSEP)
                    365: AC_DEFINE_UNQUOTED(PATHSEP,'$PATHSEP',[a path separator character])
                    366: 
1.39      pazsan    367: 
1.1       anton     368: dnl Now a little support for DOS/DJGCC
1.30      pazsan    369: AC_SUBST(GFORTH_EXE)
                    370: GFORTH_EXE=""
1.48      anton     371: AC_SUBST(GFORTHFAST_EXE)
                    372: GFORTHFAST_EXE=""
1.83      anton     373: AC_SUBST(GFORTHITC_EXE)
                    374: GFORTHITC_EXE=""
1.30      pazsan    375: AC_SUBST(GFORTHDITC_EXE)
                    376: GFORTHDITC_EXE=""
1.27      anton     377: 
                    378: AC_SUBST(FORTHSIZES)
1.24      anton     379: 
1.104     anton     380: dnl if test "$PEEPHOLE" = "yes"
                    381: dnl then
                    382: dnl    PEEPHOLEFLAG="true"
                    383: dnl    AC_DEFINE(HAS_PEEPHOLE,,[Define if you want to use peephole optimization])
                    384: dnl else
                    385: dnl    PEEPHOLEFLAG="false"
                    386: dnl fi
                    387: PEEPHOLEFLAG="true"
1.79      pazsan    388: AC_SUBST(PEEPHOLEFLAG)
                    389: 
1.1       anton     390: dnl copy commands for systems that don't have links
1.29      pazsan    391: AC_SUBST(LINK_KERNL)
                    392: LINK_KERNL=""
1.1       anton     393: 
                    394: #if test $host_os=dos
                    395: #then
                    396: #  echo Configuring for DOS!!!
                    397: #  MAKE_EXE="coff2exe gforth"
1.29      pazsan    398: #  LINK_KERNL='$(CP) kernl32l.fi kernel.fi'
1.1       anton     399: #fi
                    400: 
                    401: dnl the following macro produces a warning with autoconf-2.1
                    402: AC_C_BIGENDIAN
1.23      pazsan    403: AC_SUBST(KERNEL)
1.1       anton     404: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
                    405: if test $ac_cv_c_bigendian = yes; then
                    406:   bytesex=b
1.23      pazsan    407:   KERNEL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
1.1       anton     408: else
                    409:   bytesex=l
1.23      pazsan    410:   KERNEL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
1.1       anton     411: fi
                    412: 
1.91      anton     413: #check how to do asm(".skip 16")
1.92      anton     414: AC_MSG_CHECKING([if and how we can waste code space])
                    415: skipcode=no
1.91      anton     416: for i in ".skip 16" ".block 16" ".org .+16" ".=.+16" ".space 16"
                    417: do
                    418:        AC_TRY_RUN(
                    419: int foo(int);
                    420: main()
                    421: {
                    422:   exit(foo(0)!=16);
                    423: }
                    424: int foo(int x)
                    425: {
                    426:   if (x) {
                    427:   label1:
                    428:     asm("$i");
                    429:   label2:
                    430:   }
                    431:   return (&&label2)-(&&label1);
                    432: }
1.92      anton     433:        ,skipcode=$i; break
                    434:        ,,)
1.91      anton     435: done   
1.92      anton     436: AC_MSG_RESULT($skipcode)
                    437: if test "$skipcode" = no
                    438: then 
                    439:     no_dynamic_default=1
                    440:     AC_DEFINE_UNQUOTED(SKIP16,((void)0),statement for skipping 16 bytes)
                    441:     AC_MSG_WARN(Disabling dynamic native code generation by default (speed penalty factor ~2))
                    442: else
                    443:     AC_DEFINE_UNQUOTED(SKIP16,asm("$skipcode"),statement for skipping 16 bytes)
                    444: fi
1.91      anton     445: 
1.92      anton     446: AC_DEFINE_UNQUOTED(NO_DYNAMIC_DEFAULT,$no_dynamic_default,default value for no_dynamic)
1.91      anton     447: 
1.1       anton     448: dnl Checks for programs.
                    449: AC_PROG_LN_S
1.95      anton     450: AC_PROG_INSTALL
1.1       anton     451: 
                    452: dnl Checks for library functions
1.2       anton     453: dnl This check is just for making later checks link with libm.
                    454: dnl using sin here is no good idea since it is built-into gcc and typechecked
                    455: AC_CHECK_LIB(m,asin)
1.31      anton     456: AC_CHECK_LIB(dl,dlopen)
1.124     pazsan    457: dnl check for ffcall libraries
                    458: dnl unfortunately, these four calls are separated out into a library each.
                    459: AC_CHECK_LIB(avcall,__builtin_avcall)
                    460: AC_CHECK_LIB(callback,__vacall_r)
                    461: AC_CHECK_LIB(vacall,vacall)
                    462: AC_CHECK_LIB(trampoline,alloc_trampoline)
1.125     anton     463: FFCALLFLAG="false"
1.129     pazsan    464: OLDCALLFLAG="true"
                    465: 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])
                    466: test $ac_cv_lib_avcall___builtin_avcall = no && AC_DEFINE(HAS_OLDCALL,,[define this if you want to use the old call libraries])
1.125     anton     467: AC_SUBST(FFCALLFLAG)
1.129     pazsan    468: AC_SUBST(OLDCALLFLAG)
1.32      pazsan    469: if test "$host_os" != "nextstep3"
                    470: then
                    471:        AC_FUNC_MEMCMP
                    472: fi
1.25      pazsan    473: AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal atanh)
1.97      anton     474: AC_FUNC_FSEEKO
                    475: AC_CHECK_FUNCS(ftello dlopen sys_siglist getrusage)
1.111     anton     476: AC_CHECK_TYPES(stack_t,,,[#include <signal.h>])
1.19      anton     477: AC_DECL_SYS_SIGLIST
1.92      anton     478: AC_CHECK_FUNC(getopt_long,true,AC_LIBOBJ(getopt); AC_LIBOBJ(getopt1))
1.90      anton     479: AC_CHECK_FUNCS(expm1 log1p)
                    480: AC_REPLACE_FUNCS(rint ecvt)
1.1       anton     481: dnl No check for select, because our replacement is no good under
                    482: dnl anything but DOS
1.62      anton     483: AC_CHECK_HEADERS(sys/mman.h fnmatch.h)
1.63      anton     484: AC_FUNC_FNMATCH
1.87      pazsan    485: test $ac_cv_func_fnmatch_works = yes || AC_LIBOBJ(fnmatch)
1.28      anton     486: AC_CHECK_FUNCS(mmap sysconf getpagesize)
1.34      anton     487: AM_PATH_LISPDIR
1.1       anton     488: 
1.23      pazsan    489: kernel_fi=kernl${wordsize}${bytesex}.fi
                    490: AC_SUBST(kernel_fi)
1.50      jwilke    491: 
1.76      anton     492: #this breaks bindists
                    493: #dnl replace srource directory by absolute value
                    494: #if test $srcdir = "."; then srcdir=`pwd` 
                    495: #fi
1.8       anton     496: 
1.34      anton     497: AC_SUBST(machine)
1.95      anton     498: AC_CONFIG_FILES([
1.31      anton     499: Makefile
1.45      pazsan    500: Makedist
1.43      anton     501: gforthmi
1.80      anton     502: vmgen
1.79      pazsan    503: machpc.fs
1.35      anton     504: engine/Makefile
1.95      anton     505: doc/version.texi ])
                    506: AC_CONFIG_COMMANDS([stamp-h],[[echo timestamp > stamp-h
1.43      anton     507: chmod +x gforthmi
1.80      anton     508: chmod +x vmgen
1.95      anton     509: test -d kernel||mkdir kernel]],[[]])
                    510: AC_OUTPUT
1.44      anton     511: 

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