[project @ 2005-01-23 06:10:15 by wolfgang]
[ghc.git] / configure.ac
1 dnl == autoconf source for the Glasgow FP tools ==
2 dnl (run "grep '^dnl \*' configure.ac | sed -e 's/dnl / /g; s/\*\*/   +/g;'"
3 dnl  (or some such) to see the outline of this file)
4 dnl
5 #
6 # (c) The AQUA Project, Glasgow University, 1994-2004
7 #
8 # Configure script template for the Glasgow functional programming tools
9 #
10 # Process with 'autoreconf' to get a working configure script.
11 #
12 # For the generated configure script, do "./configure --help" to
13 # see what flags are available. (Better yet, read the documentation!)
14 #
15
16 AC_INIT([fptools build system], [1.0], [cvs-fptools@haskell.org], [fptools])
17
18 # First off, a distrib sanity check..
19 AC_CONFIG_SRCDIR([mk/config.mk.in])
20
21 dnl * We require autoconf version 2.52
22 dnl We need 2.50 due to the use of AC_SYS_LARGEFILE and AC_MSG_NOTICE.
23 dnl We need 2.52 due to the use of AS_TR_CPP and AS_TR_SH.
24 AC_PREREQ([2.52])
25
26 dnl * Declare subdirectories that have a private configure script
27 dnl
28 dnl After the toplevel configuration is complete, the script will recurse into
29 dnl these subdirectories if they exist. The use of a cache file makes repeated
30 dnl checks cheap.
31 AC_CONFIG_SUBDIRS([ghc libraries])
32
33 # -------------------------------------------------------------------------
34 # Prepare to generate the following header files
35 #
36 #
37 AC_CONFIG_HEADER(mk/config.h)
38
39 # No, semi-sadly, we don't do `--srcdir'...
40 if test x"$srcdir" != 'x.' ; then
41     echo "This configuration does not support the \`--srcdir' option.."
42     exit 1
43 fi
44
45 dnl--------------------------------------------------------------------
46 dnl * Choose host(/target/build) platform
47 dnl--------------------------------------------------------------------
48
49 dnl Guess host/target/build platform(s) if necessary.
50 AC_CANONICAL_TARGET
51
52 # "$host" defaults to "$target"
53 if test "x$host" = xNONE ; then
54     host=$target
55 fi
56
57 dnl ** canonicalize platform names
58 BuildPlatform=`/bin/sh $srcdir/config.sub $build` || exit 1
59 HostPlatform=`/bin/sh $srcdir/config.sub $host` || exit 1
60 TargetPlatform=`/bin/sh $srcdir/config.sub $target` || exit 1
61
62 if test x"$TargetPlatform" != x"$HostPlatform" ; then
63     echo "GHC configuration does not support differing host/target (i.e., cross-compiling)"
64     exit 1
65 fi
66
67 exeext=''
68 #
69 # The following will be more difficult when we *are* cross-compiling.
70 # Suitable names to slam in *_CPP are in platform.h.in.
71 # We also record the architecture, vendor, and operating system (OS)
72 # separately.
73 case $HostPlatform in
74 alpha*-dec-osf[[12]]*)
75         HostPlatform=alpha-dec-osf1   # canonicalise for our purposes
76         TargetPlatform=alpha-dec-osf1 # this will work for now... (hack)
77         BuildPlatform=alpha-dec-osf1  # hack
78         HostPlatform_CPP='alpha_dec_osf1'
79         HostArch_CPP='alpha'
80         HostVendor_CPP='dec'
81         HostOS_CPP='osf1'
82         ;;
83 alpha*-dec-osf[[345]]*)
84         HostPlatform=alpha-dec-osf3   # canonicalise for our purposes
85         TargetPlatform=alpha-dec-osf3 # this will work for now... (hack)
86         BuildPlatform=alpha-dec-osf3  # hack
87         HostPlatform_CPP='alpha_dec_osf3'
88         HostArch_CPP='alpha'
89         HostVendor_CPP='dec'
90         HostOS_CPP='osf3'
91         ;;
92 alpha*-unknown-linux*)
93         HostPlatform=alpha-unknown-linux
94         TargetPlatform=alpha-unknown-linux
95         BuildPlatform=alpha-unknown-linux
96         HostPlatform_CPP='alpha_unknown_linux'
97         HostArch_CPP='alpha'
98         HostVendor_CPP='unknown'
99         HostOS_CPP='linux'
100         ;;
101 alpha*-unknown-freebsd*)
102         HostPlatform=alpha-unknown-freebsd
103         TargetPlatform=alpha-unknown-freebsd
104         BuildPlatform=alpha-unknown-freebsd
105         HostPlatform_CPP='alpha_unknown_freebsd'
106         HostArch_CPP='alpha'
107         HostVendor_CPP='unknown'
108         HostOS_CPP='freebsd'
109         ;;
110 alpha*-unknown-openbsd*)
111         HostPlatform=alpha-unknown-openbsd
112         TargetPlatform=alpha-unknown-openbsd
113         BuildPlatform=alpha-unknown-openbsd
114         HostPlatform_CPP='alpha_unknown_openbsd'
115         HostArch_CPP='alpha'
116         HostVendor_CPP='unknown'
117         HostOS_CPP='openbsd'
118         ;;
119 amd64-*-openbsd*|x86_64-*-openbsd*)
120         HostPlatform=x86_64-unknown-openbsd
121         TargetPlatform=x86_64-unknown-openbsd
122         BuildPlatform=x86_64-unknown-openbsd
123         HostPlatform_CPP='x86_64_unknown_openbsd'
124         HostArch_CPP='x86_64'
125         HostVendor_CPP='unknown'
126         HostOS_CPP='openbsd'
127         ;;
128 arm*-linux*)
129         HostPlatform=arm-unknown-linux # hack again
130         TargetPlatform=arm-unknown-linux
131         BuildPlatform=arm-unknown-linux
132         HostPlatform_CPP='arm_unknown_linux'                 
133         HostArch_CPP='arm'
134         HostVendor_CPP='unknown'
135         HostOS_CPP='linux'
136         ;;
137 arm*-openbsd*)
138         HostPlatform=arm-unknown-openbsd
139         TargetPlatform=arm-unknown-openbsd
140         BuildPlatform=arm-unknown-openbsd
141         HostPlatform_CPP='arm_unknown_openbsd'                 
142         HostArch_CPP='arm'
143         HostVendor_CPP='unknown'
144         HostOS_CPP='openbsd'
145         ;;
146 hppa*-*-linux*)
147         HostPlatform=hppa-unknown-linux # hack again
148         TargetPlatform=hppa-unknown-linux
149         BuildPlatform=hppa-unknown-linux
150         HostPlatform_CPP='hppa_unknown_linux'                
151         HostArch_CPP='hppa'
152         HostVendor_CPP='unknown'                             
153         HostOS_CPP='linux'
154         ;;
155 hppa*-*-openbsd*)
156         HostPlatform=hppa-unknown-openbsd # hack again
157         TargetPlatform=hppa-unknown-openbsd
158         BuildPlatform=hppa-unknown-openbsd
159         HostPlatform_CPP='hppa_unknown_openbsd'                
160         HostArch_CPP='hppa'
161         HostVendor_CPP='unknown'                             
162         HostOS_CPP='openbsd'
163         ;;
164 hppa1.1-hp-hpux*)
165         HostPlatform=hppa1.1-hp-hpux  # canonicalise for our purposes (hack)
166         TargetPlatform=hppa1.1-hp-hpux
167         BuildPlatform=hppa1.1-hp-hpux
168         HostPlatform_CPP='hppa1_1_hp_hpux'
169         HostArch_CPP='hppa1_1'
170         HostVendor_CPP='hp'
171         HostOS_CPP='hpux'
172         ;;
173 i[[3456]]86-*-linuxaout*)
174         HostPlatform=i386-unknown-linuxaout   # hack again
175         TargetPlatform=i386-unknown-linuxaout
176         BuildPlatform=i386-unknown-linuxaout
177         HostPlatform_CPP='i386_unknown_linuxaout'
178         HostArch_CPP='i386'
179         HostVendor_CPP='unknown'
180         HostOS_CPP='linuxaout'
181         ;;
182 i[[3456]]86-*-linux*)
183         HostPlatform=i386-unknown-linux # hack again
184         TargetPlatform=i386-unknown-linux
185         BuildPlatform=i386-unknown-linux
186         HostPlatform_CPP='i386_unknown_linux'
187         HostArch_CPP='i386'
188         HostVendor_CPP='unknown'
189         HostOS_CPP='linux'
190         ;;
191 i[[3456]]86-*-freebsd[[3-9]]*) # FreeBSD 3.0+ uses ELF
192         HostPlatform=i386-unknown-freebsd # hack again
193         TargetPlatform=i386-unknown-freebsd
194         BuildPlatform=i386-unknown-freebsd
195         HostPlatform_CPP='i386_unknown_freebsd'
196         HostArch_CPP='i386'
197         HostVendor_CPP='unknown'
198         HostOS_CPP='freebsd'
199         ;;
200 i[[3456]]86-*-freebsd2*) # Older FreeBSDs are a.out
201         HostPlatform=i386-unknown-freebsd2 # hack again
202         TargetPlatform=i386-unknown-freebsd2
203         BuildPlatform=i386-unknown-freebsd2
204         HostPlatform_CPP='i386_unknown_freebsd2'
205         HostArch_CPP='i386'
206         HostVendor_CPP='unknown'
207         HostOS_CPP='freebsd2'
208         ;;
209 i[[3456]]86-*-netbsd*)
210         HostPlatform=i386-unknown-netbsd # hack again
211         TargetPlatform=i386-unknown-netbsd
212         BuildPlatform=i386-unknown-netbsd
213         HostPlatform_CPP='i386_unknown_netbsd'
214         HostArch_CPP='i386'
215         HostVendor_CPP='unknown'
216         HostOS_CPP='netbsd'
217         ;;
218 i[[3456]]86-*-openbsd*)
219         HostPlatform=i386-unknown-openbsd # hack again
220         TargetPlatform=i386-unknown-openbsd
221         BuildPlatform=i386-unknown-openbsd
222         HostPlatform_CPP='i386_unknown_openbsd'
223         HostArch_CPP='i386'
224         HostVendor_CPP='unknown'
225         HostOS_CPP='openbsd'
226         ;;
227 i[[3456]]86-*-solaris2*)
228         HostPlatform=i386-unknown-solaris2 # hack again
229         TargetPlatform=i386-unknown-solaris2
230         BuildPlatform=i386-unknown-solaris2
231         HostPlatform_CPP='i386_unknown_solaris2'
232         HostArch_CPP='i386'
233         HostVendor_CPP='unknown'
234         HostOS_CPP='solaris2'
235         ;;
236 i[[3456]]86-*-cygwin*)
237         HostPlatform=i386-unknown-cygwin32 # hack again
238         TargetPlatform=i386-unknown-cygwin32
239         BuildPlatform=i386-unknown-cygwin32
240         HostPlatform_CPP='i386_unknown_cygwin32'
241         HostArch_CPP='i386'
242         HostVendor_CPP='unknown'
243         HostOS_CPP='cygwin32'
244         exeext='.exe'
245         ;;
246 i[[3456]]86-*-mingw32*)
247         HostPlatform=i386-unknown-mingw32 # hack again
248         TargetPlatform=i386-unknown-mingw32
249         BuildPlatform=i386-unknown-mingw32
250         HostPlatform_CPP='i386_unknown_mingw32'
251         HostArch_CPP='i386'
252         HostVendor_CPP='unknown'
253         HostOS_CPP='mingw32'
254         exeext='.exe'
255         ;;
256 ia64-*-linux*)
257         HostPlatform=ia64-unknown-linux # hack again
258         TargetPlatform=ia64-unknown-linux
259         BuildPlatform=ia64-unknown-linux
260         HostPlatform_CPP='ia64_unknown_linux'
261         HostArch_CPP='ia64'
262         HostVendor_CPP='unknown'
263         HostOS_CPP='linux'
264         ;;
265 x86_64-*-linux*)
266         HostPlatform=x86_64-unknown-linux
267         TargetPlatform=x86_64-unknown-linux
268         BuildPlatform=x86_64-unknown-linux
269         HostPlatform_CPP='x86_64_unknown_linux'
270         HostArch_CPP='x86_64'
271         HostVendor_CPP='unknown'
272         HostOS_CPP='linux'
273         ;;
274 m68k-*-linux*)
275         HostPlatform=m68k-unknown-linux # hack again
276         TargetPlatform=m68k-unknown-linux                    
277         BuildPlatform=m68k-unknown-linux
278         HostPlatform_CPP='m68k_unknown_linux'
279         HostArch_CPP='m68k'
280         HostVendor_CPP='unknown'
281         HostOS_CPP='linux'
282         ;;
283 m68k-next-nextstep2)
284         HostPlatform_CPP='m68k_next_nextstep2'
285         HostArch_CPP='m68k'
286         HostVendor_CPP='next'
287         HostOS_CPP='nextstep2'
288         ;;
289 m68k-next-nextstep3)
290         HostPlatform_CPP='m68k_next_nextstep3'
291         HostArch_CPP='m68k'
292         HostVendor_CPP='next'
293         HostOS_CPP='nextstep3'
294         ;;
295 i[[3456]]86-next-nextstep3)
296         HostPlatform=i386-next-nextstep3 # hack again
297         TargetPlatform=i386-next-nextstep3
298         BuildPlatform=i386-next-nextstep3
299         HostPlatform_CPP='i386_next_nextstep3'
300         HostArch_CPP='i386'
301         HostVendor_CPP='next'
302         HostOS_CPP='nextstep3'
303         ;;
304 m68k-*-openbsd*)
305         HostPlatform=m68k-unknown-openbsd
306         TargetPlatform=m68k-unknown-openbsd
307         BuildPlatform=m68k-unknown-openbsd
308         HostPlatform_CPP='m68k_unknown_openbsd'
309         HostArch_CPP='m68k'
310         HostVendor_CPP='unknown'
311         HostOS_CPP='openbsd'
312         ;;
313 m68k-*-netbsd*)
314         HostPlatform=m68k-unknown-netbsd
315         TargetPlatform=m68k-unknown-netbsd
316         BuildPlatform=m68k-unknown-netbsd
317         HostPlatform_CPP='m68k_unknown_netbsd'
318         HostArch_CPP='m68k'
319         HostVendor_CPP='unknown'
320         HostOS_CPP='netbsd'
321         ;;
322 m68k-sun-sunos4*)
323         HostPlatform=m68k-sun-sunos4
324         TargetPlatform=m68k-sun-sunos4 #hack
325         BuildPlatform=m68k-sun-sunos4 #hack
326         HostPlatform_CPP='m68k_sun_sunos4'
327         HostArch_CPP='m68k'
328         HostVendor_CPP='sun'
329         HostOS_CPP='sunos4'
330         ;;
331 m88k-*-openbsd*)
332         HostPlatform=m88k-unknown-openbsd
333         TargetPlatform=m88k-unknown-openbsd
334         BuildPlatform=m88k-unknown-openbsd
335         HostPlatform_CPP='m88k_unknown_openbsd'
336         HostArch_CPP='m88k'
337         HostVendor_CPP='unknown'
338         HostOS_CPP='openbsd'
339         ;;
340 mips-*-linux*)
341         HostPlatform=mips-unknown-linux # hack again
342         TargetPlatform=mips-unknown-linux
343         BuildPlatform=mips-unknown-linux
344         HostPlatform_CPP='mips_unknown_linux'
345         HostArch_CPP='mips'
346         HostVendor_CPP='unknown'
347         HostOS_CPP='linux'
348         ;;
349 mips-dec-ultrix*)
350         HostPlatform_CPP='mips_dec_ultrix'
351         HostArch_CPP='mipsel'   # NB a little different
352         HostVendor_CPP='dec'
353         HostOS_CPP='ultrix'
354         ;;
355 mips-sgi-irix*)
356         HostPlatform=mips-sgi-irix
357         TargetPlatform=mips-sgi-irix #hack
358         BuildPlatform=mips-sgi-irix #hack
359         HostPlatform_CPP='mips_sgi_irix'
360         HostArch_CPP='mipseb'   # NB a little different
361         HostVendor_CPP='sgi'
362         HostOS_CPP='irix'
363         ;;
364 rs6000-ibm-aix*)
365         HostPlatform=rs6000-ibm-aix
366         TargetPlatform=rs6000-ibm-aix #hack
367         BuildPlatform=rs6000-ibm-aix #hack
368         HostPlatform_CPP='rs6000_ibm_aix'
369         HostArch_CPP='rs6000'
370         HostVendor_CPP='ibm'
371         HostOS_CPP='aix'
372         ;;
373 powerpc-ibm-aix*)
374         HostPlatform=powerpc-ibm-aix
375         TargetPlatform=powerpc-ibm-aix #hack
376         BuildPlatform=powerpc-ibm-aix #hack
377         HostPlatform_CPP='powerpc_ibm_aix'
378         HostArch_CPP='powerpc'
379         HostVendor_CPP='ibm'
380         HostOS_CPP='aix'
381         ;;
382 powerpc-apple-darwin*)
383         HostPlatform=powerpc-apple-darwin
384         TargetPlatform=powerpc-apple-darwin #hack
385         BuildPlatform=powerpc-apple-darwin #hack
386         HostPlatform_CPP='powerpc_apple_darwin'
387         HostArch_CPP='powerpc'
388         HostVendor_CPP='apple'
389         HostOS_CPP='darwin'
390         ;;
391 powerpc-unknown-linux*)
392         HostPlatform=powerpc-unknown-linux
393         TargetPlatform=powerpc-unknown-linux
394         BuildPlatform=powerpc-unknown-linux
395         HostPlatform_CPP='powerpc_unknown_linux'
396         HostArch_CPP='powerpc'
397         HostVendor_CPP='unknown'
398         HostOS_CPP='linux'
399         ;;
400 powerpc-unknown-openbsd*)
401         HostPlatform=powerpc-unknown-openbsd
402         TargetPlatform=powerpc-unknown-openbsd
403         BuildPlatform=powerpc-unknown-openbsd
404         HostPlatform_CPP='powerpc_unknown_openbsd'
405         HostArch_CPP='powerpc'
406         HostVendor_CPP='unknown'
407         HostOS_CPP='openbsd'
408         ;;
409 powerpc64-unknown-linux*)
410         HostPlatform=powerpc64-unknown-linux
411         TargetPlatform=powerpc64-unknown-linux
412         BuildPlatform=powerpc64-unknown-linux
413         HostPlatform_CPP='powerpc64_unknown_linux'
414         HostArch_CPP='powerpc64'
415         HostVendor_CPP='unknown'
416         HostOS_CPP='linux'
417         ;;
418                                                                 
419 s390-ibm-linux*)
420        HostPlatform=s390-ibm-linux
421        TargetPlatform=s390-ibm-linux #hack
422        BuildPlatform=s390-ibm-linux #hack
423         HostPlatform_CPP='s390_ibm_linux'
424         HostArch_CPP='s390'
425         HostVendor_CPP='ibm'
426         HostOS_CPP='linux'
427         ;;
428 sparc-sun-sunos4*)
429         HostPlatform=sparc-sun-sunos4
430         TargetPlatform=sparc-sun-sunos4 #hack
431         BuildPlatform=sparc-sun-sunos4 #hack
432         HostPlatform_CPP='sparc_sun_sunos4'
433         HostArch_CPP='sparc'
434         HostVendor_CPP='sun'
435         HostOS_CPP='sunos4'
436         ;;
437 sparc-sun-solaris2*)
438         HostPlatform=sparc-sun-solaris2
439         TargetPlatform=sparc-sun-solaris2 #hack
440         BuildPlatform=sparc-sun-solaris2 #hack
441         HostPlatform_CPP='sparc_sun_solaris2'
442         HostArch_CPP='sparc'
443         HostVendor_CPP='sun'
444         HostOS_CPP='solaris2'
445         ;;
446 sparc*-linux*)
447         HostPlatform=sparc-unknown-linux
448         TargetPlatform=sparc-unknown-linux
449         BuildPlatform=sparc-unknown-linux
450         HostPlatform_CPP='sparc_unknown_linux'
451         HostArch_CPP='sparc'
452         HostVendor_CPP='unknown'
453         HostOS_CPP='linux'
454         ;;
455 sparc-*-openbsd*)
456         HostPlatform=sparc-unknown-openbsd
457         TargetPlatform=sparc-unknown-openbsd
458         BuildPlatform=sparc-unknown-openbsd
459         HostPlatform_CPP='sparc_unknown_openbsd'
460         HostArch_CPP='sparc'
461         HostVendor_CPP='unknown'
462         HostOS_CPP='openbsd'
463         ;;
464 sparc64-*-openbsd*)
465         HostPlatform=sparc64-unknown-openbsd
466         TargetPlatform=sparc64-unknown-openbsd
467         BuildPlatform=sparc64-unknown-openbsd
468         HostPlatform_CPP='sparc64_unknown_openbsd'
469         HostArch_CPP='sparc64'
470         HostVendor_CPP='unknown'
471         HostOS_CPP='openbsd'
472         ;;
473 vax-*-openbsd*)
474         HostPlatform=vax-unknown-openbsd
475         TargetPlatform=vax-unknown-openbsd
476         BuildPlatform=vax-unknown-openbsd
477         HostPlatform_CPP='vax_unknown_openbsd'
478         HostArch_CPP='vax'
479         HostVendor_CPP='unknown'
480         HostOS_CPP='openbsd'
481         ;;
482 *)
483         echo "Unrecognised platform: $HostPlatform"
484         exit 1
485         ;;
486 esac
487 echo "Canonicalised to: $HostPlatform"
488 test  x"$HostPlatform" != x"$TargetPlatform" && echo "Target platform set to $TargetPlatform"
489 test  x"$BuildPlatform" != x"$HostPlatform"  && echo "Build platform set to $BuildPlatform"
490
491 BuildPlatform_CPP=$HostPlatform_CPP
492 TargetPlatform_CPP=$HostPlatform_CPP
493 BuildArch_CPP=$HostArch_CPP
494 TargetArch_CPP=$HostArch_CPP
495 BuildOS_CPP=$HostOS_CPP
496 HostOS_Full=$host_os
497 TargetOS_CPP=$HostOS_CPP
498 BuildVendor_CPP=$HostVendor_CPP
499 TargetVendor_CPP=$HostVendor_CPP
500
501 AC_SUBST(BuildPlatform)
502 AC_SUBST(HostPlatform)
503 AC_SUBST(TargetPlatform)
504 AC_SUBST(HostPlatform_CPP)
505 AC_SUBST(BuildPlatform_CPP)
506 AC_SUBST(TargetPlatform_CPP)
507
508 AC_SUBST(HostArch_CPP)
509 AC_SUBST(BuildArch_CPP)
510 AC_SUBST(TargetArch_CPP)
511
512 AC_SUBST(HostOS_CPP)
513 AC_SUBST(HostOS_Full)
514 AC_SUBST(BuildOS_CPP)
515 AC_SUBST(TargetOS_CPP)
516
517 AC_SUBST(HostVendor_CPP)
518 AC_SUBST(BuildVendor_CPP)
519 AC_SUBST(TargetVendor_CPP)
520
521 AC_SUBST(exeext)
522
523 dnl --------------------------------------------------------------
524 dnl * Calculate absolute path to build tree
525 dnl --------------------------------------------------------------
526
527 AC_MSG_CHECKING(for path to top of build tree)
528
529 hardtop=`pwd`
530
531 dnl Remove common automounter nonsense
532 dnl
533 hardtop=`echo $hardtop | sed 's|^/tmp_mnt.*\(/local/.*\)$|\1|' | sed 's|^/tmp_mnt/|/|' | sed 's|^//\(.\)/|\1:/|' `
534
535 dnl Find 'hardtop_plat', the native format for 'hardtop' 
536 dnl (i.e., right kind of \dnl slashes on a Win32 box, but with b-slashes being escaped).
537 dnl
538 dnl Note OSTYPE: On Cygwin we need to use 'cygpath' to convert /cygdrive/c/foo to c:/foo
539 dnl              but we must not do that if we aren't building using Cygwin (notably msys), 
540 dnl              because cygpath doesn't exist.  It seems that 'bash' sets OSTYPE to 'cygwin' 
541 dnl              or 'msys' respectively, but cygwin's 'sh' does not.  So we hackily assume
542 dnl              that if the shell hasn't set it to 'msys' then we must be in Cygwin.  Sigh.
543 dnl
544 dnl              The Right Thing is probably to test $BuildPlatform instead, but we are sloppy 
545 dnl              about setting that correctly at the moment, so we just work around for now.
546 dnl
547 dnl              The quotes round "$(OSTYPE)" are essential, for the Cygwin-sh case where OSTYPE
548 dnl              is not set.
549 case $HostPlatform in
550   i386-unknown-mingw32 | i386-unknown-cygwin32)
551         if test "${OSTYPE}" != "msys" 
552           then
553             # convert $hardtop to a path that mingw will understand too
554             cyghardtop=${hardtop}
555             hardtop=`cygpath -w ${cyghardtop} | sed -e 's@\\\\@/@g'`
556             hardtop_plat=`cygpath -w ${cyghardtop} | sed -e 's@\\\\@\\\\\\\\@g'`
557           else
558             hardtop_plat=${hardtop}
559         fi
560         ;;
561   *)
562         hardtop_plat=${hardtop}
563         ;;
564 esac
565 AC_SUBST(hardtop)
566 AC_SUBST(hardtop_plat)
567
568 AC_MSG_RESULT(${hardtop})
569
570 dnl --------------------------------------------------------------
571 dnl * Project specific configuration options
572 dnl --------------------------------------------------------------
573 dnl What follows is a bunch of options that can either be configured
574 dnl through command line options to the configure script or by
575 dnl supplying defns in the build tree's mk/build.mk. Having the option to
576 dnl use either is considered a Feature.
577
578 dnl ** What command to use to compile compiler sources ?
579 dnl --------------------------------------------------------------
580
581 AC_ARG_WITH([ghc],
582 [AC_HELP_STRING([--with-ghc=ARG],
583   [Use ARG as the path to GHC  [default=autodetect]])],
584   [WithGhc="$withval"],
585   [if test "$GHC" = ""; then
586     AC_PATH_PROG([GHC], [ghc])
587   fi
588   WithGhc="$GHC"])
589 AC_SUBST([WithGhc])
590
591 AC_ARG_WITH(hc,
592 [AC_HELP_STRING([--with-hc=ARG],
593         [Use ARG as the path to the compiler for compiling ordinary
594          Haskell code  (default= value of --with-ghc)])],
595 [WithHc="$withval"],
596 [WithHc=$WithGhc]
597 )
598 AC_SUBST(WithHc)
599
600 if test "$WithGhc" != ""; then
601   FPTOOLS_GHC_VERSION([GhcVersion], [GhcMajVersion], [GhcMinVersion], [GhcPatchLevel])dnl
602   AC_SUBST(GhcVersion)dnl
603   AC_SUBST(GhcMajVersion)dnl
604   AC_SUBST(GhcMinVersion)dnl
605   AC_SUBST(GhcPatchLevel)dnl
606 fi
607
608 AC_PATH_PROGS(NHC,nhc nhc98)
609 AC_PATH_PROG(HBC,hbc)
610
611 dnl ** Which gcc to use?
612 dnl --------------------------------------------------------------
613 AC_ARG_WITH(gcc,
614 [AC_HELP_STRING([--with-gcc=ARG],
615         [Use ARG as the path to GCC  [default=autodetect]])],
616 [WhatGccIsCalled="$withval"
617  if test "x$HostPlatform" = "xi386-unknown-mingw32"
618     then
619        if test "${OSTYPE}" != "msys"
620          then
621          # Canonicalise to <drive>:/path/to/gcc
622          withval=`cygpath -w ${withval} | sed -e 's@\\\\@/@g' `
623        fi
624  fi;
625  CC="$withval"
626  export CC
627  ],
628 [WhatGccIsCalled="gcc"]
629 )
630 AC_SUBST(WhatGccIsCalled)
631
632 dnl ** Booting from .hc files?
633 dnl --------------------------------------------------------------
634 AC_ARG_ENABLE(hc-boot,
635 [AC_HELP_STRING([--enable-hc-boot],
636 [Boot the Glasgow Haskell Compiler from intermediate .hc files.
637  (This option is mostly of interest to porters.) [default=no]])],
638 [ if test x"$enableval" = x"yes"; then
639         BootingFromHc=YES
640   else
641         BootingFromHc=NO
642   fi
643 ],
644 [BootingFromHc=NO]
645 )
646 AC_SUBST(BootingFromHc)
647
648 dnl ** Booting from unregisterised .hc files?
649 dnl --------------------------------------------------------------
650 AC_ARG_ENABLE(hc-boot-unregisterised,
651 [AC_HELP_STRING([--enable-hc-boot-unregisterised],
652 [ With --enable-hc-boot, treat the intermediate .hc files as
653  unregisterised rather than registerised code.
654  (This option is mostly of interest to porters.) [default=no]])],
655 [ if test x"$enableval" = x"yes"; then
656         BootingFromUnregisterisedHc=YES
657   else
658         BootingFromUnregisterisedHc=NO
659   fi
660 ],
661 [BootingFromUnregisterisedHc=NO]
662 )
663 AC_SUBST(BootingFromUnregisterisedHc)
664
665 if test "$BootingFromHc" = "NO"; then
666 if test "$BootingFromUnregisterisedHc" = "YES"; then
667 AC_MSG_ERROR([--enable-hc-boot-unregisterised requires --enable-hc-boot.])
668 fi;
669 fi;
670
671 dnl ** Must have GHC to build GHC, unless --enable-hc-boot is on
672 if test "$BootingFromHc" = "NO" -a "$WithGhc" = "" -a -d "$srcdir/ghc"; then
673 AC_MSG_ERROR([GHC is required unless bootstrapping from .hc files.])
674 fi;
675
676 dnl ** --enable-threaded-rts (not used any more)
677 dnl --------------------------------------------------------------
678 AC_ARG_ENABLE(threaded-rts,
679 [AC_HELP_STRING([--enable-threaded-rts],
680 [DEPRECATED (backwards compatibility only). [default=no]])],
681 [ if test x"$enableval" = x"yes"; then
682         ThreadedRts=YES
683   else
684         ThreadedRts=NO
685   fi
686 ],
687 [ThreadedRts=NO]
688 )
689 AC_SUBST(ThreadedRts)
690
691 dnl ** Enable the construction of Win32 DLLs?
692 dnl --------------------------------------------------------------
693 dnl
694 dnl [ The ability to build the RTS and libraries as separate DLLs used
695 dnl   to be supported, but isn't currently (updates to the RTS, compiler 
696 dnl   and build system would be required to bring it back again.)
697 dnl   Hence, exposing it as an option is false advertisement, so better
698 dnl   disable it to avoid confusion (but leave it commented-out rather
699 dnl   than removed in order to remind ourselves to bring back the 
700 dnl   feature at some stage.) ]
701 dnl
702 dnl AC_ARG_ENABLE(win32-dlls,
703 dnl [  --enable-win32-dlls
704 dnl         If on a Win32 platform running mingw32/cygwin, enable the
705 dnl     construction of DLLs containing ghc-compiled code.
706 dnl ],
707 dnl [
708 dnl case $HostOS_CPP in
709 dnl cygwin32) ;;
710 dnl mingw32)  ;;
711 dnl *)    echo "Unrecognised win32 platform: $HostPlatform"
712 dnl       exit 1
713 dnl       ;;
714 dnl esac
715 dnl EnableWin32DLLs=YES
716 dnl ],
717 dnl [EnableWin32DLLs=NO]
718 dnl )
719 dnl AC_SUBST(EnableWin32DLLs)
720 dnl if test x"$EnableWin32DLLs" = "xYES" ; then
721 dnl  AC_DEFINE(HAVE_WIN32_DLL_SUPPORT)
722 dnl fi
723
724 dnl ** Enable the building of the ObjectIO?
725 dnl --------------------------------------------------------------
726 AC_ARG_ENABLE(objectio,
727 [AC_HELP_STRING([--enable-objectio],
728 [Build ObjectIO, a portable GUI library for Haskell. [default=no]])],
729 [ if test x"$enableval" = x"yes"; then
730         GhcLibsWithObjectIO=YES
731   else
732         GhcLibsWithObjectIO=NO
733   fi
734 ],
735 [GhcLibsWithObjectIO=NO]
736 )
737 AC_SUBST(GhcLibsWithObjectIO)
738
739 dnl ** .NET interop support?
740 dnl --------------------------------------------------------------
741 AC_ARG_ENABLE(dotnet,
742 [AC_HELP_STRING([--enable-dotnet],
743 [Build .NET interop layer. [default=no]])],
744 [ if test x"$enableval" = x"yes"; then
745         DotnetSupport=YES; AC_DEFINE([WANT_DOTNET_SUPPORT], [1], [Define to 1 if you want to include .NET interop support.])
746   else 
747         DotnetSupport=NO
748   fi],
749 [DotnetSupport=NO]
750 )
751 AC_SUBST(DotnetSupport)
752
753 dnl --------------------------------------------------------------
754 dnl End of configure script option section
755 dnl --------------------------------------------------------------
756
757
758 dnl --------------------------------------------------------------
759 dnl * General configuration checks
760 dnl --------------------------------------------------------------
761
762 dnl ** Can the unix package be built?
763 dnl --------------------------------------------------------------
764
765 if test x"$TargetPlatform" = x"i386-unknown-mingw32"; then
766    GhcLibsWithUnix=NO
767 else
768    GhcLibsWithUnix=YES
769 fi
770 AC_SUBST([GhcLibsWithUnix])
771
772 dnl ** does #! work?
773 AC_SYS_INTERPRETER()
774
775 dnl ** look for `perl', but only in /bin on Windows
776 case $HostOS_CPP in
777 cygwin32|mingw32)
778       AC_CHECK_PROG(PerlCmd,perl,/bin/perl,,/bin)
779       if test -z "$PerlCmd"; then
780          echo "You must install the version of Perl shipped with GHC"
781          echo "(or a compatible one) in /bin."
782          exit 1
783       fi
784    ;;
785 *)
786    AC_PATH_PROG(PerlCmd,perl)
787    if test -z "$PerlCmd"; then
788       echo "You must install perl before you can continue"
789       echo "Perhaps it is already installed, but not in your PATH?"
790       exit 1
791    else
792    FPTOOLS_CHECK_PERL_VERSION
793    fi
794    ;;
795 esac
796
797 dnl ** does #! path/to/perl work? (sometimes it's too long...)
798 FPTOOLS_SHEBANG_PERL
799
800 dnl ** check for Python
801 AC_PATH_PROG(PythonCmd,python)
802
803 dnl ** look for GCC and find out which version
804 dnl     Figure out which C compiler to use.  Gcc is preferred.
805 dnl     If gcc, make sure it's at least 2.1
806 dnl
807 FP_HAVE_GCC
808 FP_MINGW_GCC
809
810 dnl ** figure out how to invoke cpp directly (gcc -E is no good)
811 AC_PROG_CPP
812
813 dnl ** Without optimization some INLINE trickery fails for GHCi
814 SRC_CC_OPTS="-O"
815
816 dnl ** Try to add -mno-cygwin to the C compiler options
817 FP_CHECK_FLAG([-mno-cygwin], [
818 SRC_CC_OPTS="-mno-cygwin $SRC_CC_OPTS"
819 CPPFLAGS="-mno-cygwin $CPPFLAGS"])
820 AC_SUBST(SRC_CC_OPTS)
821
822 dnl ** figure out how to do context diffs
823 FP_PROG_CONTEXT_DIFF
824
825 dnl ** Find find command (for Win32's benefit)
826 FP_PROG_FIND
827
828 dnl ** figure out how to do a BSD-ish install
829 AC_PROG_INSTALL
830
831 dnl If you can run configure, you certainly have /bin/sh
832 AC_DEFINE([HAVE_BIN_SH], [1], [Define to 1 if you have /bin/sh.])
833
834 dnl ** how to invoke `ar' and `ranlib'
835 FP_PROG_AR_NEEDS_RANLIB
836 FP_PROG_AR_SUPPORTS_INPUT
837
838 dnl ** Check to see whether ln -s works
839 AC_PROG_LN_S
840
841
842 dnl ** Find the path to sed
843 AC_PATH_PROG(SedCmd,sed)
844
845
846 dnl ** check for time command
847 AC_PATH_PROG(TimeCmd,time)
848
849 dnl ** check for tar
850 dnl   if GNU tar is named gtar, look for it first.
851 AC_PATH_PROGS(TarCmd,gtar tar,tar)
852
853 dnl ** check for DocBook toolchain
854 FP_CHECK_DOCBOOK_DTD
855 FP_DIR_DOCBOOK_XSL([/usr/share/xml/docbook/stylesheet/nwalsh/current /usr/share/xml/docbook/stylesheet/nwalsh /usr/share/sgml/docbook/docbook-xsl-stylesheets* /usr/share/sgml/docbook/xsl-stylesheets* /opt/kde?/share/apps/ksgmltools2/docbook/xsl /usr/share/docbook-xsl /usr/share/sgml/docbkxsl])
856 FP_PROG_FO_PROCESSOR
857
858 dnl ** check for ghc-pkg command
859 FP_PROG_GHC_PKG
860
861 AC_ARG_WITH(greencard,
862 [AC_HELP_STRING([--with-greencard=ARG],
863         [Use ARG as the path to greencard  [default=autodetct]])],
864 [
865 GreenCardCmd=$withval;
866 FPTOOLS_GREENCARD(3.00)
867 ]
868 )
869
870 AC_ARG_ENABLE(src-tree-happy,
871 [AC_HELP_STRING([--enable-src-tree-happy],
872         [Build and use source tree (fptools/happy) version of Happy. 
873          [default=autodetect]])],
874 [ if test x"$enableval" = x"yes"; then
875         UseSrcTreeHappy=YES
876   else
877         UseSrcTreeHappy=NO
878   fi
879 ],
880 [UseSrcTreeHappy=NO]
881 )
882 dnl ** check for installed happy binary + version
883 dnl    (don't do it if we're booting from .hc files though.)
884 if test "$BootingFromHc" = "NO"; then
885 FPTOOLS_HAPPY
886 fi;
887
888 AC_ARG_ENABLE(src-tree-haddock,
889 [AC_HELP_STRING([--enable-src-tree-haddock],
890         [Build and use source tree (fptools/haddock) version of Haddock.
891          [default=autodetect]])],
892 [ if test x"$enableval" = x"yes"; then
893         UseSrcTreeHaddock=YES
894   else
895         UseSrcTreeHaddock=NO
896   fi
897 ],
898 [UseSrcTreeHaddock=NO]
899 )
900 dnl ** check for installed haddock
901 FPTOOLS_HADDOCK
902
903 AC_ARG_ENABLE(src-tree-alex,
904 [AC_HELP_STRING([--enable-src-tree-alex],
905         [Build and use source tree (fptools/alex) version of Alex.
906          [default=autodetect]])],
907 [ if test x"$enableval" = x"yes"; then
908         UseSrcTreeAlex=YES
909   else
910         UseSrcTreeAlex=NO
911   fi
912 ],
913 [UseSrcTreeAlex=NO]
914 )
915 dnl ** check for installed alex binary + version
916 dnl    (don't do it if we're booting from .hc files though.)
917 if test "$BootingFromHc" = "NO"; then
918 FPTOOLS_ALEX
919 fi;
920
921 dnl --------------------------------------------------
922 dnl ### program checking section ends here ###
923 dnl --------------------------------------------------
924
925 dnl --------------------------------------------------
926 dnl * Platform header file and syscall feature tests
927 dnl ### checking the state of the local header files and syscalls ###
928
929 dnl ** check for full ANSI header (.h) files
930 AC_HEADER_STDC
931
932 dnl ** Enable large file support.  NB. do this before testing the type of
933 dnl    off_t, because it will affect the result of that test.
934 AC_SYS_LARGEFILE
935
936 dnl ** check for specific header (.h) files that we are interested in
937 AC_CHECK_HEADERS([bfd.h ctype.h dirent.h dlfcn.h errno.h fcntl.h grp.h limits.h locale.h nlist.h pthread.h pwd.h signal.h sys/mman.h sys/resource.h sys/time.h sys/timeb.h sys/timers.h sys/times.h sys/utsname.h sys/wait.h termios.h time.h utime.h windows.h winsock.h])
938
939 AC_CHECK_HEADER([readline/readline.h], [HaveReadlineReadlineH=YES], [HaveReadlineReadlineH=NO])
940 AC_CHECK_HEADER([readline/history.h], [HaveReadlineHistoryH=YES], [HaveReadlineHistoryH=NO])
941
942 if test $HaveReadlineReadlineH = YES && test $HaveReadlineHistoryH = YES ; then
943   GhcLibsWithReadline=YES
944   AC_DEFINE([HAVE_READLINE_HEADERS], [1], [Define to 1 if readline/readline.h and readline/history.h exist.])
945 else
946   GhcLibsWithReadline=NO
947   AC_DEFINE([HAVE_READLINE_HEADERS], [0], [Define to 1 if readline/readline.h and readline/history.h exist.])
948 fi
949 AC_SUBST(GhcLibsWithReadline)
950
951 dnl ** check if it is safe to include both <time.h> and <sys/time.h>
952 AC_HEADER_TIME
953
954 dnl ** check for POSIX regex
955 HavePosixRegex=NO
956 AC_CHECK_HEADERS([regex.h], [AC_CHECK_FUNCS(regcomp, [HavePosixRegex=YES])])
957 AC_SUBST(HavePosixRegex)
958
959 dnl ** how do we get a timezone name, and UTC offset ?
960 AC_STRUCT_TIMEZONE
961
962 dnl ** do we have altzone?
963 FP_DECL_ALTZONE
964
965 dnl ** do we have long longs?
966 AC_CHECK_TYPES([long long])
967
968 dnl ** what are the sizes of various types
969 AC_CHECK_SIZEOF(char,               1)
970 AC_CHECK_SIZEOF(double,             8)
971 AC_CHECK_SIZEOF(float,              4)
972 AC_CHECK_SIZEOF(int,                4)
973 AC_CHECK_SIZEOF(long,               4)
974 if test "$ac_cv_type_long_long" = yes; then
975 AC_CHECK_SIZEOF(long long,          8)
976 fi
977 AC_CHECK_SIZEOF(short,              2)
978 AC_CHECK_SIZEOF(unsigned char,      1)
979 AC_CHECK_SIZEOF(unsigned int,       4)
980 AC_CHECK_SIZEOF(unsigned long,      4)
981 if test "$ac_cv_type_long_long" = yes; then
982 AC_CHECK_SIZEOF(unsigned long long, 8)
983 fi
984 AC_CHECK_SIZEOF(unsigned short,     2)
985 AC_CHECK_SIZEOF(void *,             4)
986
987 dnl ** what are alignment constraints on various types
988 FP_CHECK_ALIGNMENT(char)
989 FP_CHECK_ALIGNMENT(double)
990 FP_CHECK_ALIGNMENT(float)
991 FP_CHECK_ALIGNMENT(int)
992 FP_CHECK_ALIGNMENT(long)
993 if test "$ac_cv_type_long_long" = yes; then
994 FP_CHECK_ALIGNMENT(long long)
995 fi
996 FP_CHECK_ALIGNMENT(short)
997 FP_CHECK_ALIGNMENT(unsigned char)
998 FP_CHECK_ALIGNMENT(unsigned int)
999 FP_CHECK_ALIGNMENT(unsigned long)
1000 if test "$ac_cv_type_long_long" = yes; then
1001 FP_CHECK_ALIGNMENT(unsigned long long)
1002 fi
1003 FP_CHECK_ALIGNMENT(unsigned short)
1004 FP_CHECK_ALIGNMENT(void *)
1005
1006 FP_CHECK_FUNC([WinExec],
1007   [@%:@include <windows.h>], [WinExec("",0)])
1008
1009 FP_CHECK_FUNC([GetModuleFileName],
1010   [@%:@include <windows.h>], [GetModuleFileName((HMODULE)0,(LPTSTR)0,0)])
1011
1012 dnl ** check return type of signal handlers
1013 dnl Foo: assumes we can use prototypes.
1014 dnl On BCC, signal handlers have type "int(void)", elsewhere its "void(int)".
1015 dnl AC_CACHE_CHECK([type of signal handlers], ac_cv_type_signal_handler,
1016 dnl [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/types.h>
1017 dnl #include <signal.h>
1018 dnl #ifdef signal
1019 dnl #undef signal
1020 dnl #endif
1021 dnl void (*signal (int, void (*)(int)))(int);
1022 dnl ]],
1023 dnl [[int i;]])],
1024 dnl [ac_cv_type_signal_handler=void_int],
1025 dnl [ac_cv_type_signal_handler=int_void])])
1026 dnl if test "$ac_cv_type_signal_handler" = void_int; then
1027 dnl AC_DEFINE(VOID_INT_SIGNALS)
1028 dnl fi
1029
1030 dnl On BCC, signal handlers have type "int(void)", elsewhere its "void(int)".
1031 AC_TYPE_SIGNAL
1032 if test "$ac_cv_type_signal" = void; then
1033   AC_DEFINE([VOID_INT_SIGNALS], [1], [Define to 1 if signal handlers have type void (*)(int). Otherwise, they're assumed to have type int (*)(void).])
1034 fi
1035
1036 dnl ** check for more functions
1037 dnl ** The following have been verified to be used in ghc/, but might be used somewhere else, too.
1038 AC_CHECK_FUNCS([getclock getrusage gettimeofday setitimer siginterrupt sysconf times])
1039 dnl ** For ghc/rts/gmp:
1040 AC_CHECK_FUNCS([getpagesize])
1041
1042 dnl ** check whether this machine has gmp3 installed
1043 AC_CHECK_LIB(gmp,  __gmpz_fdiv_qr, HaveLibGmp=YES; LibGmp=gmp,
1044   AC_CHECK_LIB(gmp3, __gmpz_fdiv_qr,  HaveLibGmp=YES; LibGmp=gmp3,
1045     HaveLibGmp=NO; LibGmp=not-installed))
1046 AC_SUBST(HaveLibGmp)
1047 AC_SUBST(LibGmp)
1048
1049 dnl ** (Mac OS X only: check for HaskellSupport.framework)
1050 HaveFrameworkHaskellSupport=NO
1051 if test $HostPlatform = "powerpc-apple-darwin"; then
1052  AC_MSG_CHECKING([for HaskellSupport.framework])
1053  save_libs="$LIBS"
1054  LIBS="-framework HaskellSupport"
1055  AC_TRY_LINK_FUNC(__gmpz_fdiv_qr, HaveFrameworkHaskellSupport=YES,)
1056  if test $HaveFrameworkHaskellSupport = YES; then
1057   AC_DEFINE([HAVE_FRAMEWORK_HASKELLSUPPORT], [1], [Define to 1 if the HaskellSupport.framework is installed (Mac OS X only).])
1058  fi;
1059  LIBS="$save_libs"
1060  AC_MSG_RESULT([$HaveFrameworkHaskellSupport])
1061 fi;
1062 AC_SUBST(HaveFrameworkHaskellSupport)
1063
1064 dnl ** check for mingwex library
1065 AC_CHECK_LIB(mingwex, closedir, HaveLibMingwEx=YES, HaveLibMingwEx=NO)
1066 AC_SUBST(HaveLibMingwEx)
1067
1068 if test $HaveLibMingwEx = YES ; then
1069   AC_DEFINE([HAVE_MINGWEX], [1], [Define to 1 if you have the mingwex library.])
1070 fi
1071
1072 if test "$HaveLibGmp" = "NO"; then
1073 if test "$HostArch_CPP" = "ia64" -o "$HostArch_CPP" = "mipseb" ; then
1074 AC_MSG_ERROR([You need to install libgmp (the in-tree version does not work on IA64 or mips64).])
1075 fi;
1076 fi;
1077
1078 dnl ** check whether this machine has BFD and liberty installed (used for debugging)
1079 dnl    the order of these tests matters: bfd needs liberty
1080 AC_CHECK_LIB(iberty, xmalloc)
1081 AC_CHECK_LIB(bfd,    bfd_init)
1082
1083 dnl ** check for readline, for Hugs and hslibs' Readline
1084 dnl ncurses supersedes termcap and curses, but for compatibility,
1085 dnl we have to check for all...
1086 AC_CHECK_LIB(ncurses, tputs, HaveLibTermcap=YES; LibTermcap=ncurses,
1087   AC_CHECK_LIB(termcap, tputs, HaveLibTermcap=YES; LibTermcap=termcap,
1088     AC_CHECK_LIB(curses, tputs, HaveLibTermcap=YES; LibTermcap=curses,
1089       HaveLibTermcap=NO; LibTermcap=not-installed)))
1090
1091 if test $HaveLibTermcap = YES ; then
1092   LIBS="-l$LibTermcap $LIBS"
1093   AC_CHECK_LIB(readline, readline, HaveLibReadline=YES, HaveLibReadline=NO)
1094 fi
1095
1096 if test $HaveLibTermcap = YES && test x"$HaveLibReadline" = xYES ; then
1097   AC_DEFINE([HAVE_READLINE_LIBS], [1], [Define to 1 if readline plus any additional libs needed for it exist.])
1098   LibsReadline="readline $LibTermcap"
1099 else
1100   AC_DEFINE([HAVE_READLINE_LIBS], [0], [Define to 1 if readline plus any additional libs needed for it exist.])
1101   LibsReadline=
1102 fi
1103 AC_SUBST(LibsReadline)
1104
1105 if test "$HaveLibReadline"; then
1106   AC_CHECK_LIB(readline, rl_erase_empty_line,
1107     [AC_DEFINE([HAVE_READLINE_4], [1], [Define to 1 if readline has version >= 4.0.])],
1108     [AC_DEFINE([HAVE_READLINE_4], [0], [Define to 1 if readline has version >= 4.0.])])
1109   AC_CHECK_LIB(readline, rl_free_undo_list,
1110     [AC_DEFINE([HAVE_READLINE_4_2], [1], [Define to 1 if readline has version >= 4.2.])],
1111     [AC_DEFINE([HAVE_READLINE_4_2], [0], [Define to 1 if readline has version >= 4.2.])])
1112 else
1113   AC_DEFINE([HAVE_READLINE_4], [0], [Define to 1 if readline has version >= 4.0.])
1114   AC_DEFINE([HAVE_READLINE_4_2], [0], [Define to 1 if readline has version >= 4.2.])
1115 fi
1116
1117 dnl ** check for math library
1118 AC_CHECK_LIB([m], [atan], [LIBS="-lm $LIBS"; LIBM="-lm"], [LIBM=])
1119 AC_SUBST([LIBM])
1120
1121 dnl ################################################################
1122 dnl Check for libraries
1123 dnl ################################################################
1124
1125 dnl ** check for libdl & RTLD_NEXT
1126
1127 dnl (Mac OS X only) ... but don't check if we already have the
1128 dnl HaskellSupport.framework
1129
1130 if test $HaveFrameworkHaskellSupport = YES; then
1131     HaveLibDL=NO
1132     HaveRtldNext=NO
1133     HaveRtldLocal=YES
1134     AC_DEFINE([HAVE_RTLDLOCAL], [1], [Define to 1 if RTLD_LOCAL is available.])
1135     HaveRtldGlobal=YES
1136     AC_DEFINE([HAVE_RTLDGLOBAL], [1], [Define to 1 if RTLD_GLOBAL is available.])
1137     HaveRtldNow=YES
1138     AC_DEFINE([HAVE_RTLDNOW], [1], [Define to 1 if we can see RTLD_NOW in dlfcn.h.])
1139     AC_SUBST(HaveLibDL)
1140     AC_SUBST(HaveRtldNext)
1141     AC_SUBST(HaveRtldLocal)
1142     AC_SUBST(HaveRtldGlobal)
1143     AC_SUBST(HaveRtldNow)
1144 else
1145     AC_CHECK_LIB(dl, dlopen, 
1146         [HaveLibDL=YES
1147          AC_DEFINE([HAVE_LIBDL], [1], [Define to 1 if you need -ldl to get dlopen().])
1148          LIBS="$LIBS -ldl"], 
1149         [HaveLibDL=NO])
1150     AC_SUBST(HaveLibDL)
1151
1152     dnl ** sometimes RTLD_NEXT is hidden in #ifdefs we really don't wan to set
1153     AC_MSG_CHECKING(for RTLD_NEXT from dlfcn.h)
1154     AC_EGREP_CPP(yes,
1155     [
1156      #include <dlfcn.h>
1157      #ifdef RTLD_NEXT
1158             yes
1159      #endif
1160     ], [
1161       AC_MSG_RESULT(yes)
1162       AC_DEFINE([HAVE_RTLDNEXT], [1], [Define to 1 if we can see RTLD_NEXT in dlfcn.h.])
1163       HaveRtldNext=YES
1164     ], [
1165       AC_MSG_RESULT(no)
1166       HaveRtldNext=NO
1167       ])    
1168     AC_SUBST(HaveRtldNext)
1169
1170     dnl ** RTLD_LOCAL isn't available on cygwin or openbsd
1171     AC_MSG_CHECKING(for RTLD_LOCAL from dlfcn.h)
1172     AC_EGREP_CPP(yes,
1173     [
1174      #include <dlfcn.h>
1175      #ifdef RTLD_LOCAL
1176             yes
1177      #endif
1178     ], [
1179       AC_MSG_RESULT(yes)
1180       AC_DEFINE(HAVE_RTLDLOCAL)
1181       HaveRtldLocal=YES
1182     ], [
1183       AC_MSG_RESULT(no)
1184       HaveRtldLocal=NO
1185       ])    
1186     AC_SUBST(HaveRtldLocal)
1187
1188     dnl ** RTLD_GLOBAL isn't available on openbsd
1189     AC_MSG_CHECKING(for RTLD_GLOBAL from dlfcn.h)
1190     AC_EGREP_CPP(yes,
1191     [
1192      #include <dlfcn.h>
1193      #ifdef RTLD_GLOBAL
1194             yes
1195      #endif
1196     ], [
1197       AC_MSG_RESULT(yes)
1198       AC_DEFINE(HAVE_RTLDGLOBAL)
1199       HaveRtldGlobal=YES
1200     ], [
1201       AC_MSG_RESULT(no)
1202       HaveRtldGlobal=NO
1203       ])    
1204     AC_SUBST(HaveRtldGlobal)
1205
1206     dnl ** RTLD_NOW isn't available on openbsd
1207     AC_MSG_CHECKING(for RTLD_NOW from dlfcn.h)
1208     AC_EGREP_CPP(yes,
1209     [
1210      #include <dlfcn.h>
1211      #ifdef RTLD_NOW
1212             yes
1213      #endif
1214     ], [
1215       AC_MSG_RESULT(yes)
1216       AC_DEFINE(HAVE_RTLDNOW)
1217       HaveRtldNow=YES
1218     ], [
1219       AC_MSG_RESULT(no)
1220       HaveRtldNow=NO
1221       ])    
1222     AC_SUBST(HaveRtldNow)
1223 fi
1224
1225 dnl --------------------------------------------------
1226 dnl * Miscellaneous feature tests
1227 dnl --------------------------------------------------
1228
1229 dnl ** can we get alloca?
1230 AC_FUNC_ALLOCA
1231
1232 dnl ** Working vfork?
1233 AC_FUNC_FORK
1234
1235 dnl ** determine whether or not const works
1236 AC_C_CONST
1237
1238 dnl ** are we big endian?
1239 AC_C_BIGENDIAN
1240
1241 dnl ** check for leading underscores in symbol names
1242 FP_LEADING_UNDERSCORE
1243
1244 dnl ** check for ld, whether it has an -x option, and if it is GNU ld
1245 FP_PROG_LD_X
1246 FP_PROG_LD_IS_GNU
1247
1248 dnl ** check for Apple-style dead-stripping support
1249 dnl    (.subsections-via-symbols assembler directive)
1250
1251
1252 AC_MSG_CHECKING(for .subsections_via_symbols)
1253 AC_TRY_COMPILE(,[__asm__ (".subsections_via_symbols");],
1254     [
1255         AC_MSG_RESULT(yes)
1256         AC_DEFINE([HAVE_SUBSECTIONS_VIA_SYMBOLS],[1],
1257             [Define to 1 if Apple-style dead-stripping is supported.])
1258     ],
1259     [
1260         AC_DEFINE([HAVE_SUBSECTIONS_VIA_SYMBOLS],[0],
1261             [Define to 1 if Apple-style dead-stripping is supported.])
1262     ])
1263
1264 AC_CONFIG_FILES([mk/config.mk])
1265 AC_CONFIG_COMMANDS([mk/stamp-h],[echo timestamp > mk/stamp-h])
1266 AC_OUTPUT