1: dnl Process this file with autoconf to produce a configure script.
2:
3: #Copyright (C) 1995,1996,1997,1998,2000,2003,2004,2005,2006 Free Software Foundation, Inc.
4:
5: #This file is part of Gforth.
6:
7: #Gforth is free software; you can redistribute it and/or
8: #modify it under the terms of the GNU General Public License
9: #as published by the Free Software Foundation; either version 2
10: #of the License, or (at your option) any later version.
11:
12: #This program is distributed in the hope that it will be useful,
13: #but WITHOUT ANY WARRANTY; without even the implied warranty of
14: #MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.#See the
15: #GNU General Public License for more details.
16:
17: #You should have received a copy of the GNU General Public License
18: #along with this program; if not, write to the Free Software
19: #Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
20:
21:
22: dnl We use some automake macros here,
23: dnl but don't use automake for creating Makefile.in
24: AC_INIT([gforth],[0.6.9-20070401],[https://savannah.gnu.org/bugs/?func=addbug&group=gforth])
25: AC_PREREQ(2.54)
26: #snapshots have numbers major.minor.release-YYYYMMDD
27: #note that lexicographic ordering must be heeded.
28: #I.e., 0.4.1-YYYYMMDD must not exist before 0.4.1!
29: UPDATED="April 09, 2006"
30: AC_SUBST(UPDATED)
31: AC_CONFIG_HEADERS(engine/config.h)
32:
33: #suppress the "-g -O2" default
34: test "$CFLAGS" || CFLAGS=-O2
35:
36: AC_ARG_ENABLE(force-reg,
37: AC_HELP_STRING([--enable-force-reg],
38: [ Use explicit register declarations if they appear in
39: the machine.h file. This can cause a good speedup,
40: but also incorrect code with some gcc versions on
41: some processors (default disabled).]),
42: ,enable_force_reg=no)
43: test "$enable_force_reg" = "no"||
44: AC_DEFINE(FORCE_REG,,[Define if you want to use explicit register declarations for better performance or for more convenient CODE words (does not work with all GCC versions on all machines)])
45:
46: AC_ARG_ENABLE(force-ll,
47: AC_HELP_STRING([--enable-force-ll],
48: [ Use explicit long long declarations if they appear in
49: the machine.h file. This can cause a good speedup,
50: but also incorrect code with some gcc versions on
51: some processors (default disabled).]),
52: ,enable_force_ll=no)
53: test "$enable_force_ll" = "no"||
54: AC_DEFINE(FORCE_LL,,[Define if you want to use explicit long long declarations for better performance (does not work with all GCC versions on all machines)])
55:
56: AC_ARG_ENABLE(force-cdiv,
57: AC_HELP_STRING([--enable-force-cdiv],
58: [ Use the native C division - symmetric - instead of
59: floored division (default disabled).]),
60: ,enable_force_cdiv=no)
61: test "$enable_force_cdiv" = "no"||
62: AC_DEFINE(FORCE_CDIV,,[Define if you want to use explicit symmetric division for better performance])
63:
64: AC_SUBST(PROFEXES)
65: AC_SUBST(PROFOBJS)
66: AC_ARG_ENABLE(prof,
67: AC_HELP_STRING([--enable-prof],
68: [ Build gforth-prof, which outputs frequently occuring
69: sequences of primitives.]),
70: ,enable_prof=no)
71: if test "$enable_prof" = "no"; then
72: PROFEXES="gforth-prof\$(EXE)"; PROFOBJS="engine-prof.o main-prof.o profile.o"
73: fi
74:
75: AC_ARG_WITH(debug,
76: [ --with-debug specifies option -g to compile with debug info
77: --without-debug omits the -g switch and creates smaller images on
78: machines where "strip" has problems with gcc style
79: debugging informations.],
80: if test "$withval" = "yes"; then DEBUGFLAG=-g; fi)
81:
82: dnl PEEPHOLE="yes"
83: dnl AC_ARG_WITH(peephole,
84: dnl [ --with-peephole Enable peephole optimization (default)
85: dnl --without-peephole disables peephole optimization. Creates smaller,
86: dnl but slower images.],
87: dnl PEEPHOLE="$withval")
88:
89: AC_ARG_WITH(ec,
90: AC_HELP_STRING([--with-ec=<arch>],
91: [ Build gforth for systems without OS.]),
92: [if test "$withval" = "no"; then
93: echo "defining hosted system"
94: EC_MODE="false"
95: EC=""
96: engine2="engine2.o"
97: engine_fast2="engine-fast2.o"
98: no_dynamic=""
99: image_i=""
100: signals_o="io.o signals.o"
101: GCC_LD="\$(GCC)"
102: else
103: echo "defining standalone system (${withval})"
104: AC_DEFINE(STANDALONE,,[Define if you want a Gforth without OS])
105: EC_MODE="true"
106: EC="-ec"
107: engine2=""
108: engine_fast2=""
109: no_dynamic="-DNO_DYNAMIC"
110: image_i="image.i"
111: if test "$withval" != "yes"; then
112: signals_o="io-${withval}.o"
113: else
114: signals_o="io.o"
115: fi
116: GCC_PATH=$(which $CC)
117: LIB_PATH=${GCC_PATH%/*/*}
118: GCC_LD="\$(LD)"
119: plattform=${withval}
120: fi])
121:
122: #variables mentioned in INSTALL
123: AC_ARG_VAR(CC, [The C compiler (must support GNU C 2.x); gcc-2.95 recommended.])
124: AC_ARG_VAR(FORTHSIZES, [Gforth command line options for the default stack and dictionary sizes (see INSTALL).])
125: AC_ARG_VAR(STACK_CACHE_DEFAULT_FAST, [number of registers in the default stack cache state for gforth-fast and gforth-native (default 1).])
126: AC_ARG_VAR(GCC_PR15242_WORKAROUND, [Force the enabling (1) or disabling (0) of a workaround for a gcc-3.x performance bug (default unset: use workaround for gcc-3.x)])
127:
128: AC_ARG_VAR(ac_cv_sizeof_char_p, [sizeof(char *)])
129: AC_ARG_VAR(ac_cv_sizeof_void_p, [sizeof(void *)])
130: AC_ARG_VAR(ac_cv_sizeof_char, [sizeof(char)])
131: AC_ARG_VAR(ac_cv_sizeof_short, [sizeof(short)])
132: AC_ARG_VAR(ac_cv_sizeof_int, [sizeof(int)])
133: AC_ARG_VAR(ac_cv_sizeof_long, [sizeof(long)])
134: AC_ARG_VAR(ac_cv_sizeof_long_long, [sizeof(long long)])
135: AC_ARG_VAR(ac_cv_sizeof_intptr_t, [sizeof(intptr_t)])
136: AC_ARG_VAR(ac_cv_sizeof_int128_t, [sizeof(int128_t)])
137: AC_ARG_VAR(ac_cv_sizeof_uint128_t, [sizeof(uint128_t)])
138: AC_ARG_VAR(ac_cv_c_bigendian, [Is the target big-endian ("yes" or "no")?])
139: AC_ARG_VAR(no_dynamic_default, [run gforth with --dynamic (0) or --no-dynamic (1) by default])
140: AC_ARG_VAR(skipcode, [assembly code for skipping 16 bytes of code])
141: AC_ARG_VAR(asmcomment, [assembler comment start string])
142: AC_ARG_VAR(arm_cacheflush, [file containing ARM cacheflush function (without .c)])
143:
144: #set up feature test macros, so the tests get them right:
145: # turn on all POSIX, SUSv3, and GNU features if available
146: AC_GNU_SOURCE
147: dnl AC_DEFINE_UNQUOTED([_GNU_SOURCE],1,[feature test macro])
148:
149: dnl Don't define _POSIX_SOURCE etc. because some OSs (in particular
150: dnl MacOSX) disable some features then (MacOSX checks for _POSIX_SOURCE,
151: dnl but not for _XOPEN_SOURCE)
152: dnl AC_DEFINE_UNQUOTED([_POSIX_SOURCE],1,[feature test macro])
153: dnl AC_DEFINE_UNQUOTED([_POSIX_C_SOURCE],199506L,[feature test macro])
154: dnl AC_DEFINE_UNQUOTED([_XOPEN_SOURCE],600,[feature test macro])
155: # turn on large file support with 64-bit off_t where available
156: AC_SYS_LARGEFILE
157: dnl AC_DEFINE_UNQUOTED([_LARGEFILE_SOURCE],1,[feature test macro])
158: dnl AC_DEFINE_UNQUOTED([_FILE_OFFSET_BITS],64,[feature test macro])
159:
160: #currently we force direct threading this way. Eventually we should
161: #setup in the arch and engine files right
162:
163: AC_PROG_CC
164:
165: test "$GCC" = "yes" || AC_MSG_ERROR(Gforth uses GNU C extensions and requires GCC 2.0 or higher)
166:
167: AC_SUBST(CC)
168: AC_SUBST(GCC_LD)
169: AC_SUBST(DEBUGFLAG)
170: AC_SUBST(EC)
171: AC_SUBST(EC_MODE)
172: AC_SUBST(engine2)
173: AC_SUBST(engine_fast2)
174: AC_SUBST(no_dynamic)
175: AC_SUBST(image_i)
176: AC_SUBST(signals_o)
177:
178: #this is used to disable some (not generally essential) part of the
179: #Makefile that some makes don't grok. It would be better to test for
180: #this specific Makefile feature than the make version.
181: AC_MSG_CHECKING(make type)
182: make_type=`make -n -v 2>&1|grep 'ake'|sed 's/ake .*/ake/'`
183: GNUMAKE='#'
184: test "$make_type" = "GNU Make" && GNUMAKE=''
185: AC_MSG_RESULT($make_type)
186: AC_SUBST(GNUMAKE)
187:
188: AC_MSG_CHECKING([whether the linker accepts -export-dynamic])
189: OLDLDFLAGS=$LDFLAGS
190: LDFLAGS="$LDFLAGS -export-dynamic"
191: dnl AC_TRY_LINK gives false positive on rs6000-ibm-aix4.2.1.0
192: dnl AC_TRY_LINK(,,ac_export_dynamic=yes,ac_export_dynamic=no)
193: AC_TRY_RUN(main(){exit(0);},ac_export_dynamic=yes,ac_export_dynamic=no,ac_export_dynamic=no)
194: test $ac_export_dynamic = yes|| LDFLAGS=$OLDLDFLAGS
195: AC_MSG_RESULT($ac_export_dynamic)
196:
197: #terminology is a bit unusual here: The host is the system on which
198: #gforth will run; the system on which configure will run is the `build'
199: AC_CANONICAL_HOST
200: case "$host_cpu" in
201: arm*)
202: machine=arm
203: CFLAGS="$CFLAGS -fomit-frame-pointer"
204: if test x$plattform = xnxt; then
205: CFLAGS="$CFLAGS -mthumb -mthumb-interwork"
206: fi
207: if test -z $arm_cacheflush; then
208: no_dynamic_default=1
209: arm_cacheflush=arch/arm/cacheflush0
210: AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
211: fi
212: AC_LIBSOURCES([../arch/arm/cacheflush0, ../arch/arm/cacheflush1, ../arch/arm/cacheflush2])
213: AC_LIBOBJ(../$arm_cacheflush)
214: #longer skipcodes lead to problems on ARM, and it uses
215: #only 4-byte alignment anyway
216: test "$skipcode" || skipcode="nop"
217: ;;
218: hppa*)
219: machine=hppa
220: $srcdir/mkinstalldirs arch/hppa
221: AC_LIBOBJ(../arch/hppa/cache)
222: #-N needed for --dynamic <M4U3b.3790$9d.317@news.cpqcorp.net>
223: LDFLAGS="$LDFLAGS -Xlinker -N"
224: LIBS="$LIBS -L/lib/pa1.1/"
225: ;;
226: sparc*)
227: machine=sparc
228: ;;
229: i386)
230: machine=386
231: CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
232: ;;
233: i486)
234: machine=386
235: CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem -m486"
236: ;;
237: i*86)
238: machine=386
239: CFLAGS="$CFLAGS -fomit-frame-pointer -fforce-addr -fforce-mem"
240: CFLAGS_1="$CFLAGS"
241: CFLAGS="$CFLAGS -march=pentium"
242: AC_TRY_COMPILE(,,,CFLAGS="$CFLAGS_1 -m486")
243: ;;
244: x86_64)
245: machine=amd64
246: ;;
247: ia64*)
248: machine=ia64
249: AC_LIBOBJ(../arch/ia64/flush_icache_block)
250: test "$skipcode" || skipcode="nop.i 0"
251: #".skip 16" passes the test below,
252: # but gives an assembler error in engine
253: ;;
254: m68k)
255: machine=m68k
256: CFLAGS="$CFLAGS -fomit-frame-pointer"
257: if test "$host_os" = "nextstep3"
258: then
259: AC_LIBOBJ(termios)
260: fi
261: ;;
262: mips*)
263: machine=mips
264: #dynamic native code has the following problems on MIPS:
265: #
266: #1) J/JAL seems relocatable, but is are only
267: #relocatable within a 256MB-segment. While we try to
268: #get the linker to arrange this, there is no guarantee
269: #that this will succeed (and if the user uses a lot of
270: #memory, it is likely to fail).
271: #
272: #2) The way we generate dynamic native code may
273: #violate MIPS architectural restrictions (in
274: #particular, the delay slots of LW, MFLO, etc.)
275: #
276: #Therefore we disable dynamic native code by default:
277: if test -z $no_dynamic_default; then
278: no_dynamic_default=1
279: AC_MSG_WARN([Disabling default dynamic native code generation (relocation and delay slot issues)])
280: fi
281: ;;
282: alpha*)
283: machine=alpha
284: #full IEEE FP support for more uniformity across platforms:
285: CFLAGS="$CFLAGS -mieee"
286: ;;
287: power*|rs6000)
288: machine=power
289: $srcdir/mkinstalldirs arch/power
290: AC_CHECK_FUNC(_sync_cache_range,[true],[AC_LIBOBJ(../arch/power/_sync_cache_range)])
291: #long long is broken on (at least) gcc-2.95.* for PPC
292: test x$ac_cv_sizeof_long_long = x &&
293: ($CC -v 2>&1 |grep -q 'gcc version 2.95') &&
294: ac_cv_sizeof_long_long=0
295: ;;
296: *)
297: AC_MSG_WARN([Using a generic machine description])
298: AC_MSG_WARN([Assuming C floats and doubles are IEEE floats and doubles (for SF@ DF@ SF! DF!)])
299: AC_MSG_WARN([FLUSH-ICACHE will do nothing, so END-CODE may not work properly!])
300: machine=generic
301: #I-cache flushing would be needed for dynamic code generation
302: if test -z $no_dynamic_default; then
303: no_dynamic_default=1
304: AC_MSG_WARN([No I-cache flush code known, disabling dynamic native code generation])
305: fi
306: esac
307: AC_SUBST(host)
308:
309: echo "Check for arch/$machine/$plattform/gforth.ld ($EC_MODE)"
310: if test x$EC_MODE = xtrue
311: then
312: echo "Check for arch/$machine/$plattform/gforth.ld"
313: if test -f arch/$machine/$plattform/gforth.ld
314: then
315: LDFLAGS="-T ../arch/$machine/$plattform/gforth.ld -Map \$@.map -cref --gc-sections $LDFLAGS"
316: if test x$plattform = xnxt; then
317: LIBS="$LIB_PATH/lib/gcc/arm-elf/$($CC --version | grep GCC | cut -d' ' -f3)/interwork/libgcc.a $LIB_PATH/arm-elf/lib/interwork/libc.a $LIBS"
318: fi
319: fi
320: fi
321:
322: test x$STACK_CACHE_DEFAULT_FAST = x && STACK_CACHE_DEFAULT_FAST=1
323: AC_DEFINE_UNQUOTED(STACK_CACHE_DEFAULT_FAST, $STACK_CACHE_DEFAULT_FAST,
324: [number of registers in the default stack cache state for gforth-fast and gforth-native])
325:
326: test x$GCC_PR15242_WORKAROUND = x ||
327: AC_DEFINE_UNQUOTED(GCC_PR15242_WORKAROUND, $GCC_PR15242_WORKAROUND,
328: [force (1) or forbid (0) use of a workaround for a gcc performance bug])
329:
330: dnl AC_DEFINE(GCC_PR15242_WORKAROUND,,[Define if you want to get dynamic code
331: dnl generation on gccs affected by PR15242])
332:
333:
334: if test "${enable_force_ll+set}" = set; then
335: ac_includes_default="$ac_includes_default
336: #include \"arch/generic/128bit.h\""
337: fi
338:
339: dnl the following macro produces a warning with autoconf-2.1
340: AC_CHECK_SIZEOF(char *)
341: case "$ac_cv_sizeof_char_p" in
342: 2)
343: wordsize=16
344: ;;
345: 4)
346: wordsize=32
347: ;;
348: 8)
349: wordsize=64
350: ;;
351: esac
352:
353: AC_CHECK_SIZEOF(void *)
354: case "$ac_cv_sizeof_void_p" in
355: 2)
356: vwordsize=16
357: ;;
358: 4)
359: vwordsize=32
360: ;;
361: 8)
362: vwordsize=64
363: ;;
364: esac
365:
366: AC_CHECK_SIZEOF(char)
367: AC_CHECK_SIZEOF(short)
368: AC_CHECK_SIZEOF(int)
369: AC_CHECK_SIZEOF(long)
370: AC_CHECK_SIZEOF(long long)
371: AC_CHECK_SIZEOF(intptr_t)
372: AC_CHECK_SIZEOF(int128_t)
373: AC_CHECK_SIZEOF(uint128_t)
374:
375: AC_MSG_CHECKING([for a C type for cells])
376: ac_cv_int_type_cell=none
377: case "$ac_cv_sizeof_char_p" in
378: $ac_cv_sizeof_int)
379: ac_cv_int_type_cell=int
380: ;;
381: $ac_cv_sizeof_short)
382: ac_cv_int_type_cell=short
383: ;;
384: $ac_cv_sizeof_char)
385: ac_cv_int_type_cell=char
386: ;;
387: $ac_cv_sizeof_long)
388: ac_cv_int_type_cell=long
389: ;;
390: $ac_cv_sizeof_long_long)
391: ac_cv_int_type_cell="long long"
392: ;;
393: $ac_cv_sizeof_intptr_t)
394: ac_cv_int_type_cell="intptr_t"
395: ;;
396: $ac_cv_sizeof_int128_t)
397: ac_cv_int_type_cell="int128_t"
398: ;;
399: esac
400: AC_MSG_RESULT($ac_cv_int_type_cell)
401: AC_DEFINE_UNQUOTED(CELL_TYPE,$ac_cv_int_type_cell,[an integer type that is as long as a pointer])
402:
403: AC_MSG_CHECKING([for a C type for wydes])
404: ac_cv_wyde_type_cell=none
405: case 2 in
406: $ac_cv_sizeof_int)
407: ac_cv_wyde_type_cell=int
408: ;;
409: $ac_cv_sizeof_short)
410: ac_cv_wyde_type_cell=short
411: ;;
412: $ac_cv_sizeof_char)
413: ac_cv_wyde_type_cell=char
414: ;;
415: $ac_cv_sizeof_long)
416: ac_cv_wyde_type_cell=long
417: ;;
418: $ac_cv_sizeof_long_long)
419: ac_cv_wyde_type_cell="long long"
420: ;;
421: $ac_cv_sizeof_intptr_t)
422: ac_cv_wyde_type_cell="intptr_t"
423: ;;
424: $ac_cv_sizeof_int128_t)
425: ac_cv_wyde_type_cell="int128_t"
426: ;;
427: esac
428: AC_MSG_RESULT($ac_cv_wyde_type_cell)
429: AC_DEFINE_UNQUOTED(WYDE_TYPE,$ac_cv_wyde_type_cell,[an integer type that is 2 bytes long])
430:
431: AC_MSG_CHECKING([for a C type for tetrabytes])
432: ac_cv_tetrabyte_type_cell=none
433: case 4 in
434: $ac_cv_sizeof_int)
435: ac_cv_tetrabyte_type_cell=int
436: ;;
437: $ac_cv_sizeof_short)
438: ac_cv_tetrabyte_type_cell=short
439: ;;
440: $ac_cv_sizeof_char)
441: ac_cv_tetrabyte_type_cell=char
442: ;;
443: $ac_cv_sizeof_long)
444: ac_cv_tetrabyte_type_cell=long
445: ;;
446: $ac_cv_sizeof_long_long)
447: ac_cv_tetrabyte_type_cell="long long"
448: ;;
449: $ac_cv_sizeof_intptr_t)
450: ac_cv_tetrabyte_type_cell="intptr_t"
451: ;;
452: $ac_cv_sizeof_int128_t)
453: ac_cv_tetrabyte_type_cell="int128_t"
454: ;;
455: esac
456: AC_MSG_RESULT($ac_cv_tetrabyte_type_cell)
457: AC_DEFINE_UNQUOTED(TETRABYTE_TYPE,$ac_cv_tetrabyte_type_cell,[an integer type that is 4 bytes long])
458:
459: AC_MSG_CHECKING([for a C type for double-cells])
460: ac_cv_int_type_double_cell=none
461: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
462: $ac_cv_sizeof_short)
463: ac_cv_int_type_double_cell=short
464: ;;
465: $ac_cv_sizeof_int)
466: ac_cv_int_type_double_cell=int
467: ;;
468: $ac_cv_sizeof_long)
469: ac_cv_int_type_double_cell=long
470: ;;
471: $ac_cv_sizeof_long_long)
472: ac_cv_int_type_double_cell="long long"
473: ;;
474: $ac_cv_sizeof_intptr_t)
475: ac_cv_int_type_double_cell="intptr_t"
476: ;;
477: $ac_cv_sizeof_int128_t)
478: ac_cv_int_type_double_cell="int128_t"
479: ;;
480: esac
481: AC_MSG_RESULT($ac_cv_int_type_double_cell)
482:
483: AC_MSG_CHECKING([for a C type for unsigned double-cells])
484: ac_cv_int_type_double_ucell=none
485: case `expr 2 '*' "$ac_cv_sizeof_char_p"` in
486: $ac_cv_sizeof_short)
487: ac_cv_int_type_double_ucell="unsigned short"
488: ;;
489: $ac_cv_sizeof_int)
490: ac_cv_int_type_double_ucell="unsigned int"
491: ;;
492: $ac_cv_sizeof_long)
493: ac_cv_int_type_double_ucell="unsigned long"
494: ;;
495: $ac_cv_sizeof_long_long)
496: ac_cv_int_type_double_ucell="unsigned long long"
497: ;;
498: $ac_cv_sizeof_intptr_t)
499: ac_cv_int_type_double_ucell="unsigned intptr_t"
500: ;;
501: $ac_cv_sizeof_uint128_t)
502: ac_cv_int_type_double_ucell="uint128_t"
503: ;;
504: esac
505: AC_MSG_RESULT($ac_cv_int_type_double_ucell)
506:
507: if test "$ac_cv_int_type_double_cell" = none || \
508: test "$ac_cv_int_type_double_ucell" = none
509: then
510: AC_MSG_WARN([Emulating double-cell arithmetic. This may be slow.])
511: AC_LIBOBJ(dblsub)
512: AC_DEFINE(BUGGY_LONG_LONG,,[define this if there is no working DOUBLE_CELL_TYPE on your machine])
513: else
514: AC_DEFINE_UNQUOTED(DOUBLE_CELL_TYPE,$ac_cv_int_type_double_cell,[an integer type that is twice as long as a pointer])
515: AC_DEFINE_UNQUOTED(DOUBLE_UCELL_TYPE,$ac_cv_int_type_double_ucell,[an unsigned integer type that is twice as long as a pointer])
516: fi
517:
518: AC_TYPE_OFF_T
519: AC_CHECK_SIZEOF(off_t)
520: test $ac_cv_sizeof_off_t -gt $ac_cv_sizeof_char_p
521: ac_small_off_t=$?
522: AC_DEFINE_UNQUOTED(SMALL_OFF_T,$ac_small_off_t,[1 if off_t fits in a Cell])
523:
524: ENGINE_FLAGS=
525: AC_SUBST(ENGINE_FLAGS)
526:
527: # Try if GCC understands -fno-gcse
528:
529: AC_MSG_CHECKING([if $CC understands -fno-gcse])
530: CFLAGS_1="$CFLAGS"
531: CFLAGS="$CFLAGS -fno-gcse"
532: AC_TRY_COMPILE(,,ac_nogcse=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-gcse",ac_nogcse=no)
533: CFLAGS="$CFLAGS_1"
534: AC_MSG_RESULT($ac_nogcse)
535:
536: # Try if GCC understands -fno-strict-aliasing
537: AC_MSG_CHECKING([if $CC understands -fno-strict-aliasing])
538: CFLAGS_1="$CFLAGS"
539: CFLAGS="$CFLAGS -fno-strict-aliasing"
540: AC_TRY_COMPILE(,,ac_nostrictaliasing=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-strict-aliasing",ac_nostrictaliasing=no)
541: CFLAGS="$CFLAGS_1"
542: AC_MSG_RESULT($ac_nostrictaliasing)
543:
544: # Try if GCC understands -fno-crossjumping
545: AC_MSG_CHECKING([if $CC understands -fno-crossjumping])
546: CFLAGS_1="$CFLAGS"
547: CFLAGS="$CFLAGS -fno-crossjumping"
548: AC_TRY_COMPILE(,,ac_nocrossjumping=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-crossjumping",ac_nocrossjumping=no)
549: CFLAGS="$CFLAGS_1"
550: AC_MSG_RESULT($ac_nocrossjumping)
551:
552: # Try if GCC understands -fno-reorder-blocks
553: AC_MSG_CHECKING([if $CC understands -fno-reorder-blocks])
554: CFLAGS_1="$CFLAGS"
555: CFLAGS="$CFLAGS -fno-reorder-blocks"
556: AC_TRY_COMPILE(,,ac_noreorder_blocks=yes;ENGINE_FLAGS="$ENGINE_FLAGS -fno-reorder-blocks",ac_noreorder_blocks=no)
557: CFLAGS="$CFLAGS_1"
558: AC_MSG_RESULT($ac_noreorder_blocks)
559:
560: # Try if GCC understands __attribute__((unused))
561: AC_MSG_CHECKING([how to suppress 'unused variable' warnings])
562: AC_TRY_COMPILE(,[int __attribute__((unused)) foo;], MAYBE_UNUSED='__attribute__((unused))',)
563: AC_DEFINE_UNQUOTED(MAYBE_UNUSED,$MAYBE_UNUSED,[attribute for possibly unused variables])
564: AC_MSG_RESULT($MAYBE_UNUSED)
565:
566: AC_CHECK_PROG(asm_fs,asm.fs,arch/$machine/asm.fs,,$srcdir/arch/$machine)
567: AC_SUBST(asm_fs)
568:
569: AC_CHECK_PROG(disasm_fs,disasm.fs,arch/$machine/disasm.fs,,$srcdir/arch/$machine)
570: AC_SUBST(disasm_fs)
571:
572: AC_PATH_PROG(INSTALL_INFO,install-info,[echo '>>>>Please make info dir entry:'],$PATH:/sbin:/usr/sbin:/usr/local/sbin)
573:
574: case "$host_os" in
575: *win32*)
576: # !!!FIXME!!! problems with cygwin and ';' as path separator
577: DIRSEP="\\\\"
578: PATHSEP=";"
579: #we want the builtins of command.com/cmd.exe and its
580: # handling of .com files.
581: #$COMSPEC contains the name of the Windows shell;
582: # the ./ is there, because the bash does not recognize
583: # absolute DOS filenames
584: DEFAULTSYSTEMPREFIX="./$COMSPEC /c "
585: ;;
586: *darwin*)
587: #Darwin uses some funny preprocessor by default; eliminate it:
588: AC_MSG_NOTICE([using -no-cpp-precomp on Darwin])
589: CFLAGS="$CFLAGS -no-cpp-precomp"
590: DIRSEP="/"
591: PATHSEP=":"
592: DEFAULTSYSTEMPREFIX=""
593: ;;
594: *)
595: DIRSEP="/"
596: PATHSEP=":"
597: DEFAULTSYSTEMPREFIX=""
598: ;;
599: esac
600: AC_SUBST(DIRSEP)
601: AC_DEFINE_UNQUOTED(DIRSEP,'$DIRSEP',[a directory separator character])
602: AC_SUBST(PATHSEP)
603: AC_DEFINE_UNQUOTED(PATHSEP,'$PATHSEP',[a path separator character])
604: AC_SUBST(DEFAULTSYSTEMPREFIX)
605: AC_DEFINE_UNQUOTED(DEFAULTSYSTEMPREFIX,"$DEFAULTSYSTEMPREFIX",[default for environment variable GFORTHSYSTEMPREFIX])
606:
607: #work around SELinux brain damage (from Andrew Haley <12t8f3jakb74g2c@news.supernews.com>)
608: #This magic incantation seems to be completely undocumented.
609: AC_CHECK_PROG([MASSAGE_EXE],[chcon],[chcon -t unconfined_execmem_exec_t],[true])
610:
611: dnl Now a little support for DOS/DJGCC
612: AC_SUBST(GFORTH_EXE)
613: GFORTH_EXE=""
614: AC_SUBST(GFORTHFAST_EXE)
615: GFORTHFAST_EXE=""
616: AC_SUBST(GFORTHITC_EXE)
617: GFORTHITC_EXE=""
618: AC_SUBST(GFORTHDITC_EXE)
619: GFORTHDITC_EXE=""
620:
621: AC_SUBST(FORTHSIZES)
622:
623: dnl if test "$PEEPHOLE" = "yes"
624: dnl then
625: dnl PEEPHOLEFLAG="true"
626: dnl AC_DEFINE(HAS_PEEPHOLE,,[Define if you want to use peephole optimization])
627: dnl else
628: dnl PEEPHOLEFLAG="false"
629: dnl fi
630: PEEPHOLEFLAG="true"
631: AC_SUBST(PEEPHOLEFLAG)
632:
633: dnl copy commands for systems that don't have links
634: AC_SUBST(LINK_KERNL)
635: LINK_KERNL=""
636:
637: #if test $host_os=dos
638: #then
639: # echo Configuring for DOS!!!
640: # MAKE_EXE="coff2exe gforth"
641: # LINK_KERNL='$(CP) kernl32l.fi kernel.fi'
642: #fi
643:
644: dnl the following macro produces a warning with autoconf-2.1
645: AC_C_BIGENDIAN
646: AC_SUBST(KERNEL)
647: dnl ac_cv_c_bigendian is an undocumented variable of autoconf-2.1
648: if test $ac_cv_c_bigendian = yes; then
649: bytesex=b
650: KERNEL="kernl16b.fi kernl16l.fi kernl32b.fi kernl32l.fi kernl64b.fi kernl64l.fi"
651: else
652: bytesex=l
653: KERNEL="kernl16l.fi kernl16b.fi kernl32l.fi kernl32b.fi kernl64l.fi kernl64b.fi"
654: fi
655:
656: #check how to do asm(".skip 16")
657: #echo "CFLAGS=$CFLAGS"
658: #echo "ac_link=$ac_link"
659: AC_MSG_CHECKING([if and how we can waste code space])
660: if test -z "$skipcode"; then
661: skipcode=no
662: CFLAGS_1="$CFLAGS"
663: CFLAGS="$CFLAGS $ENGINE_FLAGS"
664: for i in ".skip 16" ".block 16" ".org .+16" ".=.+16" ".space 16"
665: do
666: AC_TRY_RUN(
667: [int foo(int,int,int);
668: main()
669: {
670: exit(foo(0,0,0)!=16);
671: }
672: int foo(int x, int y, int z)
673: {
674: static void *labels[]={&&label1, &&label2};
675: if (x) {
676: y++; /* workaround for http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12108 */
677: label1:
678: asm("$i"); /* or ".space 16" or somesuch */
679: label2: ;
680: }
681: {
682: if (y) goto *labels[z]; /* workaround for gcc PR12108 */
683: return labels[1]-labels[0];
684: }
685: }]
686: ,skipcode=$i; break
687: ,,)
688: done
689: CFLAGS=$CFLAGS_1
690: fi
691: AC_MSG_RESULT($skipcode)
692: if test "$skipcode" = no
693: then
694: if test -z $no_dynamic_default; then
695: no_dynamic_default=1
696: AC_MSG_WARN(Disabling default dynamic native code generation)
697: fi
698: AC_DEFINE_UNQUOTED(SKIP16,((void)0),statement for skipping 16 bytes)
699: else
700: AC_DEFINE_UNQUOTED(SKIP16,asm("$skipcode"),statement for skipping 16 bytes)
701: fi
702:
703: AC_MSG_CHECKING([if and how we can do comments in asm statements])
704: #the point here is to get asm statements that look different to
705: #gcc's "optimizer"
706: if test -z "$asmcomment"; then
707: asmcomment=no
708: CFLAGS_1="$CFLAGS"
709: CFLAGS="$CFLAGS $ENGINE_FLAGS"
710: for i in '"# "' '"! "' '"; "'; do
711: AC_TRY_COMPILE(,[asm($i"fluffystunk");],asmcomment=$i; break,)
712: done
713: CFLAGS=$CFLAGS_1
714: fi
715: AC_MSG_RESULT($asmcomment)
716: if test "$asmcomment" != no
717: then
718: AC_DEFINE_UNQUOTED(ASMCOMMENT,$asmcomment,[assembler comment start string])
719: fi
720:
721: test "$no_dynamic_default" || no_dynamic_default=0
722: AC_DEFINE_UNQUOTED(NO_DYNAMIC_DEFAULT,$no_dynamic_default,default value for no_dynamic)
723:
724: dnl Checks for programs.
725: AC_PROG_LN_S
726: AC_PROG_INSTALL
727: AC_CHECK_PROGS(TEXI2DVI,texi2dvi4a2ps texi2dvi)
728:
729: dnl Checks for library functions
730: dnl This check is just for making later checks link with libm.
731: dnl using sin here is no good idea since it is built-into gcc and typechecked
732: AC_CHECK_LIB(m,asin)
733: AC_CHECK_LIB(dl,dlopen)
734: dnl check for libffi 2.x
735: AC_CHECK_LIB(ffi,ffi_call)
736: if test $ac_cv_lib_ffi_ffi_call = yes
737: then
738: LIBFFIFLAG="true"
739: FFCALLFLAG="false"
740: OLDCALLFLAG="false"
741: AC_DEFINE(HAS_LIBFFI,,[define this if you want to use the ffcall interface with libffi 2.0])
742: else
743: dnl check for ffcall libraries
744: dnl unfortunately, these four calls are separated out into a library each.
745: AC_CHECK_LIB(avcall,__builtin_avcall)
746: AC_CHECK_LIB(callback,__vacall_r)
747: AC_CHECK_LIB(vacall,vacall)
748: AC_CHECK_LIB(trampoline,alloc_trampoline)
749: LIBFFIFLAG="false"
750: FFCALLFLAG="false"
751: OLDCALLFLAG="true"
752: 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])
753: test $ac_cv_lib_avcall___builtin_avcall = no && AC_DEFINE(HAS_OLDCALL,,[define this if you want to use the old call libraries])
754: fi
755: AC_SUBST(LIBFFIFLAG)
756: AC_SUBST(FFCALLFLAG)
757: AC_SUBST(OLDCALLFLAG)
758: if test "$host_os" != "nextstep3"
759: then
760: AC_FUNC_MEMCMP
761: fi
762: AC_REPLACE_FUNCS(memmove strtoul pow10 strerror strsignal atanh)
763: AC_FUNC_FSEEKO
764: AC_CHECK_FUNCS(ftello dlopen sys_siglist getrusage)
765: AC_CHECK_TYPES(stack_t,,,[#include <signal.h>])
766: AC_DECL_SYS_SIGLIST
767: AC_CHECK_FUNC(getopt_long,[true],[AC_LIBOBJ(getopt) AC_LIBOBJ(getopt1)])
768: AC_CHECK_FUNCS(expm1 log1p)
769: AC_REPLACE_FUNCS(rint ecvt)
770: dnl No check for select, because our replacement is no good under
771: dnl anything but DOS
772: AC_CHECK_HEADERS(sys/mman.h fnmatch.h)
773: AC_FUNC_FNMATCH
774: test $ac_cv_func_fnmatch_works = yes || AC_LIBOBJ(fnmatch)
775: AC_CHECK_FUNCS(mmap sysconf getpagesize)
776: AM_PATH_LISPDIR
777:
778: kernel_fi=kernl${vwordsize}${bytesex}.fi
779: include_fi=kernl${wordsize}${bytesex}${EC}.fi
780: AC_SUBST(kernel_fi)
781: AC_SUBST(include_fi)
782:
783: #this breaks bindists
784: #dnl replace srource directory by absolute value
785: #if test $srcdir = "."; then srcdir=`pwd`
786: #fi
787:
788: AC_SUBST(machine)
789: AC_CONFIG_FILES([
790: Makefile
791: Makedist
792: gforthmi
793: vmgen
794: machpc.fs
795: envos.fs
796: engine/Makefile
797: doc/version.texi
798: build-ec ])
799: AC_CONFIG_COMMANDS([stamp-h],[[echo timestamp > stamp-h
800: chmod +x gforthmi
801: chmod +x vmgen
802: chmod +x build-ec
803: test -d kernel||mkdir kernel]],[[]])
804: AC_OUTPUT
805:
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