llvm.org GIT mirror llvm / release_21 autoconf / configure.ac
release_21

Tree @release_21 (Download .tar.gz)

configure.ac @release_21raw · history · blame

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
dnl === configure.ac --------------------------------------------------------===
dnl                     The LLVM Compiler Infrastructure
dnl
dnl This file was developed by the LLVM research group and is distributed under
dnl the University of Illinois Open Source License. See LICENSE.TXT for details.
dnl 
dnl===-----------------------------------------------------------------------===
dnl This is the LLVM configuration script. It is processed by the autoconf
dnl program to produce a script named configure. This script contains the 
dnl configuration checks that LLVM needs in order to support multiple platforms.
dnl This file is composed of 10 sections per the recommended organization of
dnl autoconf input defined in the autoconf documentation. As this file evolves,
dnl please keep the various types of checks within their sections. The sections
dnl are as follows:
dnl
dnl SECTION 1: Initialization & Setup
dnl SECTION 2: Architecture, target, and host checks
dnl SECTION 3: Command line arguments for the configure script.
dnl SECTION 4: Check for programs we need and that they are the right version
dnl SECTION 5: Check for libraries
dnl SECTION 6: Check for header files
dnl SECTION 7: Check for types and structures
dnl SECTION 8: Check for specific functions needed
dnl SECTION 9: Additional checks, variables, etc.
dnl SECTION 10: Specify the output files and generate it
dnl
dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 1: Initialization & Setup
dnl===
dnl===-----------------------------------------------------------------------===
dnl Initialize autoconf and define the package name, version number and
dnl email address for reporting bugs.
AC_INIT([[llvm]],[[2.1]],[llvmbugs@cs.uiuc.edu])

dnl Provide a copyright substitution and ensure the copyright notice is included
dnl in the output of --version option of the generated configure script.
AC_SUBST(LLVM_COPYRIGHT,["Copyright (c) 2003-2007 University of Illinois at Urbana-Champaign."])
AC_COPYRIGHT([Copyright (c) 2003-2007 University of Illinois at Urbana-Champaign.])

dnl Indicate that we require autoconf 2.59 or later. Ths is needed because we
dnl use some autoconf macros only available in 2.59.
AC_PREREQ(2.59)

dnl Verify that the source directory is valid. This makes sure that we are
dnl configuring LLVM and not some other package (it validates --srcdir argument)
AC_CONFIG_SRCDIR([lib/VMCore/Module.cpp])

dnl Place all of the extra autoconf files into the config subdirectory. Tell 
dnl various tools where the m4 autoconf macros are. 
AC_CONFIG_AUX_DIR([autoconf])

dnl Quit if the source directory has already been configured.
dnl NOTE: This relies upon undocumented autoconf behavior.
if test ${srcdir} != "." ; then
  if test -f ${srcdir}/include/llvm/Config/config.h ; then
    AC_MSG_ERROR([Already configured in ${srcdir}])
  fi
fi

dnl Configure all of the projects present in our source tree. While we could
dnl just AC_CONFIG_SUBDIRS on the set of directories in projects that have a
dnl configure script, that usage of the AC_CONFIG_SUBDIRS macro is deprecated.
dnl Instead we match on the known projects.
for i in `ls ${srcdir}/projects`
do
  if test -d ${srcdir}/projects/${i} ; then
    case ${i} in
      CVS) ;;
      sample)       AC_CONFIG_SUBDIRS([projects/sample])    ;;
      privbracket)  AC_CONFIG_SUBDIRS([projects/privbracket]) ;;
      llvm-stacker) AC_CONFIG_SUBDIRS([projects/llvm-stacker]) ;;
      llvm-test)    AC_CONFIG_SUBDIRS([projects/llvm-test]) ;;
      llvm-reopt)   AC_CONFIG_SUBDIRS([projects/llvm-reopt]);;
      llvm-gcc)     AC_CONFIG_SUBDIRS([projects/llvm-gcc])  ;;
      llvm-java)    AC_CONFIG_SUBDIRS([projects/llvm-java]) ;;
      llvm-tv)      AC_CONFIG_SUBDIRS([projects/llvm-tv])   ;;
      llvm-poolalloc) AC_CONFIG_SUBDIRS([projects/llvm-poolalloc]) ;;
      poolalloc)    AC_CONFIG_SUBDIRS([projects/poolalloc]) ;;
      llvm-kernel)  AC_CONFIG_SUBDIRS([projects/llvm-kernel]) ;;
      *)              
        AC_MSG_WARN([Unknown project (${i}) won't be configured automatically])
        ;;
    esac
  fi
done

dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 2: Architecture, target, and host checks
dnl===
dnl===-----------------------------------------------------------------------===

dnl Check the target for which we're compiling and the host that will do the
dnl compilations. This will tell us which LLVM compiler will be used for 
dnl compiling SSA into object code. This needs to be done early because 
dnl following tests depend on it.
AC_CANONICAL_TARGET

dnl Determine the platform type and cache its value. This helps us configure
dnl the System library to the correct build platform.
AC_CACHE_CHECK([type of operating system we're going to host on],
               [llvm_cv_os_type],
[case $host in
  *-*-aix*) 
    llvm_cv_link_all_option="-Wl,--whole-archive"
    llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    llvm_cv_os_type="AIX" 
    llvm_cv_platform_type="Unix" ;;
  *-*-irix*) 
    llvm_cv_link_all_option="-Wl,--whole-archive"
    llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    llvm_cv_os_type="IRIX" 
    llvm_cv_platform_type="Unix" ;;
  *-*-cygwin*) 
    llvm_cv_link_all_option="-Wl,--whole-archive"
    llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    llvm_cv_os_type="Cygwin" 
    llvm_cv_platform_type="Unix" ;;
  *-*-darwin*) 
    llvm_cv_link_all_option="-Wl,-all_load"
    llvm_cv_link_all_option="-Wl,-noall_load"
    llvm_cv_os_type="Darwin"
    llvm_cv_platform_type="Unix" ;;
  *-*-freebsd*) 
    llvm_cv_link_all_option="-Wl,--whole-archive"
    llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    llvm_cv_os_type="FreeBSD" 
    llvm_cv_platform_type="Unix" ;;
  *-*-openbsd*) 
    llvm_cv_link_all_option="-Wl,--whole-archive"
    llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    llvm_cv_os_type="OpenBSD" 
    llvm_cv_platform_type="Unix" ;;
  *-*-netbsd*) 
    llvm_cv_link_all_option="-Wl,--whole-archive"
    llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    llvm_cv_os_type="NetBSD" 
    llvm_cv_platform_type="Unix" ;;
  *-*-hpux*) 
    llvm_cv_link_all_option="-Wl,--whole-archive"
    llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    llvm_cv_os_type="HP-UX" 
    llvm_cv_platform_type="Unix" ;;
  *-*-interix*) 
    llvm_cv_link_all_option="-Wl,--whole-archive"
    llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    llvm_cv_os_type="Interix"
    llvm_cv_platform_type="Unix" ;;
  *-*-linux*) 
    llvm_cv_link_all_option="-Wl,--whole-archive"
    llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    llvm_cv_os_type="Linux"
    llvm_cv_platform_type="Unix" ;;
  *-*-solaris*) 
    llvm_cv_link_all_option="-Wl,-z,allextract"
    llvm_cv_no_link_all_option="-Wl,-z,defaultextract"
    llvm_cv_os_type="SunOS"
    llvm_cv_platform_type="Unix" ;;
  *-*-win32*) 
    llvm_cv_link_all_option="-Wl,--whole-archive"
    llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    llvm_cv_os_type="Win32"
    llvm_cv_platform_type="Win32" ;;
  *-*-mingw*) 
    llvm_cv_link_all_option="-Wl,--whole-archive"
    llvm_cv_no_link_all_option="-Wl,--no-whole-archive"
    llvm_cv_os_type="MingW" 
    llvm_cv_platform_type="Win32" ;;
  *) 
    llvm_cv_link_all_option="" 
    llvm_cv_no_link_all_option=""
    llvm_cv_os_type="Unknown" 
    llvm_cv_platform_type="Unknown" ;;
esac])

dnl Make sure we aren't attempting to configure for an unknown system
if test "$llvm_cv_os_type" = "Unknown" ; then
  AC_MSG_ERROR([Operating system is unknown, configure can't continue])
fi

dnl Set the "OS" Makefile variable based on the platform type so the
dnl makefile can configure itself to specific build hosts
AC_SUBST(OS,$llvm_cv_os_type)

dnl Set the LINKALL and NOLINKALL Makefile variables based on the platform
AC_SUBST(LINKALL,$llvm_cv_link_all_option)
AC_SUBST(NOLINKALL,$llvm_cv_no_link_all_option)

dnl Set the "LLVM_ON_*" variables based on llvm_cvs_platform_type
dnl This is used by lib/System to determine the basic kind of implementation
dnl to use.
case $llvm_cv_platform_type in
  Unix)  
    AC_DEFINE([LLVM_ON_UNIX],[1],[Define if this is Unixish platform]) 
    AC_SUBST(LLVM_ON_UNIX,[1])
    AC_SUBST(LLVM_ON_WIN32,[0])
    ;;
  Win32) 
    AC_DEFINE([LLVM_ON_WIN32],[1],[Define if this is Win32ish platform]) 
    AC_SUBST(LLVM_ON_UNIX,[0])
    AC_SUBST(LLVM_ON_WIN32,[1])
    ;;
esac

dnl Determine what our target architecture is and configure accordingly.
dnl This will allow Makefiles to make a distinction between the hardware and
dnl the OS.
AC_CACHE_CHECK([target architecture],[llvm_cv_target_arch],
[case $target in
  i?86-*)                 llvm_cv_target_arch="x86" ;;
  amd64-* | x86_64-*)     llvm_cv_target_arch="x86_64" ;;
  sparc*-*)               llvm_cv_target_arch="Sparc" ;;
  powerpc*-*)             llvm_cv_target_arch="PowerPC" ;;
  alpha*-*)               llvm_cv_target_arch="Alpha" ;;
  ia64-*)                 llvm_cv_target_arch="IA64" ;;
  arm-*)                  llvm_cv_target_arch="ARM" ;;
  mips-*)                 llvm_cv_target_arch="Mips" ;;
  *)                      llvm_cv_target_arch="Unknown" ;;
esac])

if test "$llvm_cv_target_arch" = "Unknown" ; then
  AC_MSG_WARN([Configuring LLVM for an unknown target archicture])
fi

dnl Define a substitution, ARCH, for the target architecture
AC_SUBST(ARCH,$llvm_cv_target_arch)

dnl Check for the endianness of the target
AC_C_BIGENDIAN(AC_SUBST([ENDIAN],[big]),AC_SUBST([ENDIAN],[little]))

dnl Check for build platform executable suffix if we're crosscompiling
if test "$cross_compiling" = yes; then
  AC_SUBST(LLVM_CROSS_COMPILING, [1])  
  AC_BUILD_EXEEXT
else
  AC_SUBST(LLVM_CROSS_COMPILING, [0])
fi

dnl Check to see if there's a "CVS" (or .svn) directory indicating that this 
dnl build is being done from a checkout. This sets up several defaults for the
dnl command line switches. When we build with a CVS directory, we get a 
dnl debug with assertions turned on. Without, we assume a source release and we
dnl get an optimized build without assertions. See --enable-optimized and
dnl --enable-assertions below
if test -d "CVS" -o -d "${srcdir}/CVS" -o -d ".svn" -o -d "${srcdir}/.svn"; then
  cvsbuild="yes"
  optimize="no"
  AC_SUBST(CVSBUILD,[[CVSBUILD=1]])
else
  cvsbuild="no"
  optimize="yes"
fi

dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 3: Command line arguments for the configure script.
dnl===
dnl===-----------------------------------------------------------------------===

dnl --enable-optimized : check whether they want to do an optimized build:
AC_ARG_ENABLE(optimized, AS_HELP_STRING(
 [--enable-optimized,Compile with optimizations enabled (default is NO)]),,enableval=$optimize)
if test ${enableval} = "no" ; then
  AC_SUBST(ENABLE_OPTIMIZED,[[]])
else
  AC_SUBST(ENABLE_OPTIMIZED,[[ENABLE_OPTIMIZED=1]])
fi

dnl --enable-assertions : check whether they want to turn on assertions or not:
AC_ARG_ENABLE(assertions,AS_HELP_STRING(
  [--enable-assertions,Compile with assertion checks enabled (default is YES)]),, enableval="yes")
if test ${enableval} = "yes" ; then
  AC_SUBST(DISABLE_ASSERTIONS,[[]])
else
  AC_SUBST(DISABLE_ASSERTIONS,[[DISABLE_ASSERTIONS=1]])
fi

dnl --enable-expensive-checks : check whether they want to turn on expensive debug checks:
AC_ARG_ENABLE(expensive-checks,AS_HELP_STRING(
  [--enable-expensive-checks,Compile with expensive debug checks enabled (default is NO)]),, enableval="no")
if test ${enableval} = "yes" ; then
  AC_SUBST(ENABLE_EXPENSIVE_CHECKS,[[ENABLE_EXPENSIVE_CHECKS=1]])
  AC_SUBST(EXPENSIVE_CHECKS,[[yes]])
else
  AC_SUBST(ENABLE_EXPENSIVE_CHECKS,[[]])
  AC_SUBST(EXPENSIVE_CHECKS,[[no]])
fi

dnl --enable-debug-runtime : should runtime libraries have debug symbols?
AC_ARG_ENABLE(debug-runtime,
   AS_HELP_STRING([--enable-debug-runtime,Build runtime libs with debug symbols (default is NO)]),,enableval=no)
if test ${enableval} = "no" ; then
  AC_SUBST(DEBUG_RUNTIME,[[]])
else
  AC_SUBST(DEBUG_RUNTIME,[[DEBUG_RUNTIME=1]])
fi

dnl --enable-jit: check whether they want to enable the jit
AC_ARG_ENABLE(jit,
  AS_HELP_STRING(--enable-jit,
                 [Enable Just In Time Compiling (default is YES)]),,
  enableval=default)
if test ${enableval} = "no"
then
  AC_SUBST(JIT,[[]])
else
  case "$llvm_cv_target_arch" in
    x86)     AC_SUBST(TARGET_HAS_JIT,1) ;;
    Sparc)   AC_SUBST(TARGET_HAS_JIT,0) ;;
    PowerPC) AC_SUBST(TARGET_HAS_JIT,1) ;;
    x86_64)  AC_SUBST(TARGET_HAS_JIT,1) ;;
    Alpha)   AC_SUBST(TARGET_HAS_JIT,1) ;;
    IA64)    AC_SUBST(TARGET_HAS_JIT,0) ;;
    ARM)     AC_SUBST(TARGET_HAS_JIT,0) ;;
    Mips)    AC_SUBST(TARGET_HAS_JIT,0) ;;
    *)       AC_SUBST(TARGET_HAS_JIT,0) ;;
  esac
fi

dnl Allow enablement of doxygen generated documentation
AC_ARG_ENABLE(doxygen,
              AS_HELP_STRING([--enable-doxygen],
                             [Build doxygen documentation (default is NO)]),,
                             enableval=default)
case "$enableval" in
  yes) AC_SUBST(ENABLE_DOXYGEN,[1]) ;;
  no)  AC_SUBST(ENABLE_DOXYGEN,[0]) ;;
  default) AC_SUBST(ENABLE_DOXYGEN,[0]) ;;
  *) AC_MSG_ERROR([Invalid setting for --enable-doxygen. Use "yes" or "no"]) ;;
esac

dnl Allow disablement of threads
AC_ARG_ENABLE(threads,
              AS_HELP_STRING([--enable-threads],
                             [Use threads if available (default is YES)]),,
                             enableval=default)
case "$enableval" in
  yes) AC_SUBST(ENABLE_THREADS,[1]) ;;
  no)  AC_SUBST(ENABLE_THREADS,[0]) ;;
  default) AC_SUBST(ENABLE_THREADS,[1]) ;;
  *) AC_MSG_ERROR([Invalid setting for --enable-threads. Use "yes" or "no"]) ;;
esac
AC_DEFINE_UNQUOTED([ENABLE_THREADS],$ENABLE_THREADS,[Define if threads enabled])

dnl Allow building with position independent code
AC_ARG_ENABLE(pic,
  AS_HELP_STRING([--enable-pic],
                 [Build LLVM with Position Independent Code (default is NO)]),,
                 enableval=default)
case "$enableval" in
  yes) AC_SUBST(ENABLE_PIC,[1]) ;;
  no)  AC_SUBST(ENABLE_PIC,[0]) ;;
  default) AC_SUBST(ENABLE_PIC,[0]) ;;
  *) AC_MSG_ERROR([Invalid setting for --enable-pic. Use "yes" or "no"]) ;;
esac
AC_DEFINE_UNQUOTED([ENABLE_PIC],$ENABLE_PIC,
                   [Define if position independent code is enabled])

dnl Allow specific targets to be specified for building (or not)
TARGETS_TO_BUILD=""
AC_ARG_ENABLE([targets],AS_HELP_STRING([--enable-targets],
    [Build specific host targets: all,host-only,{target-name} (default=all)]),,
    enableval=all)
case "$enableval" in
  all) TARGETS_TO_BUILD="X86 Sparc PowerPC Alpha IA64 ARM Mips" ;;
  host-only)
    case "$llvm_cv_target_arch" in
      x86)     TARGETS_TO_BUILD="X86" ;;
      x86_64)  TARGETS_TO_BUILD="X86" ;;
      Sparc)   TARGETS_TO_BUILD="Sparc" ;;
      PowerPC) TARGETS_TO_BUILD="PowerPC" ;;
      Alpha)   TARGETS_TO_BUILD="Alpha" ;;
      IA64)    TARGETS_TO_BUILD="IA64" ;;
      ARM)     TARGETS_TO_BUILD="ARM" ;;
      Mips)    TARGETS_TO_BUILD="Mips" ;;
      *)       AC_MSG_ERROR([Can not set target to build]) ;;
    esac 
    ;;
  *)for a_target in `echo $enableval|sed -e 's/,/ /g' ` ; do
      case "$a_target" in
        x86)     TARGETS_TO_BUILD="X86 $TARGETS_TO_BUILD" ;;
        x86_64)  TARGETS_TO_BUILD="X86 $TARGETS_TO_BUILD" ;;
        sparc)   TARGETS_TO_BUILD="Sparc $TARGETS_TO_BUILD" ;;
        powerpc) TARGETS_TO_BUILD="PowerPC $TARGETS_TO_BUILD" ;;
        alpha)   TARGETS_TO_BUILD="Alpha $TARGETS_TO_BUILD" ;;
        ia64)    TARGETS_TO_BUILD="IA64 $TARGETS_TO_BUILD" ;;
        arm)     TARGETS_TO_BUILD="ARM $TARGETS_TO_BUILD" ;;
        mips)    TARGETS_TO_BUILD="Mips $TARGETS_TO_BUILD" ;;
        *) AC_MSG_ERROR([Unrecognized target $a_target]) ;;
      esac
  done 
  ;;
esac
TARGETS_TO_BUILD="CBackend MSIL $TARGETS_TO_BUILD"
AC_SUBST(TARGETS_TO_BUILD,$TARGETS_TO_BUILD)

dnl Prevent the CBackend from using printf("%a") for floating point so older
dnl C compilers that cannot deal with the 0x0p+0 hex floating point format
dnl can still compile the CBE's output
AC_ARG_ENABLE([cbe-printf-a],AS_HELP_STRING([--enable-cbe-printf-a],
  [Enable C Backend output with hex floating point via %a  (default is YES)]),,
  enableval=default)
case "$enableval" in
  yes) AC_SUBST(ENABLE_CBE_PRINTF_A,[1]) ;;
  no)  AC_SUBST(ENABLE_CBE_PRINTF_A,[0]) ;;
  default)  AC_SUBST(ENABLE_CBE_PRINTF_A,[1]) ;;
  *) AC_MSG_ERROR([Invalid setting for --enable-cbe-printf-a. Use "yes" or "no"]) ;;
esac
AC_DEFINE_UNQUOTED([ENABLE_CBE_PRINTF_A],$ENABLE_CBE_PRINTF_A,
                   [Define if CBE is enabled for printf %a output])

dnl Allow a specific llvm-gcc/llvm-g++ pair to be used with this LLVM config.
AC_ARG_WITH(llvmgccdir,
  AS_HELP_STRING([--with-llvmgccdir],
    [Specify location of llvm-gcc install dir (default searches PATH)]),,
    withval=default)
case "$withval" in
  default) WITH_LLVMGCCDIR=default ;;
  /* | [[A-Za-z]]:[[\\/]]*)      WITH_LLVMGCCDIR=$withval ;;
  *) AC_MSG_ERROR([Invalid path for --with-llvmgccdir. Provide full path]) ;;
esac

dnl Specify extra build options
AC_ARG_WITH(extra-options,
  AS_HELP_STRING([--with-extra-options],
                 [Specify addtional options to compile LLVM with]),,
                 withval=default)
case "$withval" in
  default) EXTRA_OPTIONS= ;;
  *) EXTRA_OPTIONS=$withval ;;
esac
AC_SUBST(EXTRA_OPTIONS,$EXTRA_OPTIONS)

dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 4: Check for programs we need and that they are the right version
dnl===
dnl===-----------------------------------------------------------------------===

dnl Check for compilation tools
AC_PROG_CPP
AC_PROG_CC(gcc)
AC_PROG_CXX(g++)
AC_PROG_FLEX
AC_PROG_BISON

AC_PROG_NM
AC_SUBST(NM)

dnl Check for the tools that the makefiles require
AC_CHECK_GNU_MAKE
AC_PROG_LN_S
AC_PATH_PROG(CMP, [cmp], [cmp])
AC_PATH_PROG(CP, [cp], [cp])
AC_PATH_PROG(DATE, [date], [date])
AC_PATH_PROG(FIND, [find], [find])
AC_PATH_PROG(GREP, [grep], [grep])
AC_PATH_PROG(MKDIR,[mkdir],[mkdir])
AC_PATH_PROG(MV,   [mv],   [mv])
AC_PROG_RANLIB
AC_PATH_PROG(RM,   [rm],   [rm])
AC_PATH_PROG(SED,  [sed],  [sed])
AC_PATH_PROG(TAR,  [tar],  [gtar])
AC_PATH_PROG(BINPWD,[pwd],  [pwd])

dnl Looking for misc. graph plotting software
AC_PATH_PROG(GRAPHVIZ, [Graphviz], [echo Graphviz])
if test "$GRAPHVIZ" != "echo Graphviz" ; then
  AC_DEFINE([HAVE_GRAPHVIZ],[1],[Define if the Graphviz program is available])
  dnl If we're targeting for mingw we should emit windows paths, not msys
  if test "$llvm_cv_os_type" = "MingW" ; then
    GRAPHVIZ=`echo $GRAPHVIZ | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
  fi
  AC_DEFINE_UNQUOTED([LLVM_PATH_GRAPHVIZ],"$GRAPHVIZ${EXEEXT}",
   [Define to path to Graphviz program if found or 'echo Graphviz' otherwise])
fi
AC_PATH_PROG(DOT, [dot], [echo dot])
if test "$DOT" != "echo dot" ; then
  AC_DEFINE([HAVE_DOT],[1],[Define if the dot program is available])
  dnl If we're targeting for mingw we should emit windows paths, not msys
  if test "$llvm_cv_os_type" = "MingW" ; then
    DOT=`echo $DOT | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
  fi
  AC_DEFINE_UNQUOTED([LLVM_PATH_DOT],"$DOT${EXEEXT}",
   [Define to path to dot program if found or 'echo dot' otherwise])
fi
AC_PATH_PROGS(GV, [gv gsview32], [echo gv])
if test "$GV" != "echo gv" ; then
  AC_DEFINE([HAVE_GV],[1],[Define if the gv program is available])
  dnl If we're targeting for mingw we should emit windows paths, not msys
  if test "$llvm_cv_os_type" = "MingW" ; then
    GV=`echo $GV | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
  fi
  AC_DEFINE_UNQUOTED([LLVM_PATH_GV],"$GV${EXEEXT}",
   [Define to path to gv program if found or 'echo gv' otherwise])
fi
AC_PATH_PROG(DOTTY, [dotty], [echo dotty])
if test "$DOTTY" != "echo dotty" ; then
  AC_DEFINE([HAVE_DOTTY],[1],[Define if the dotty program is available])
  dnl If we're targeting for mingw we should emit windows paths, not msys
  if test "$llvm_cv_os_type" = "MingW" ; then
    DOTTY=`echo $DOTTY | sed 's/^\/\([[A-Za-z]]\)\//\1:\//' `
  fi
  AC_DEFINE_UNQUOTED([LLVM_PATH_DOTTY],"$DOTTY${EXEEXT}",
   [Define to path to dotty program if found or 'echo dotty' otherwise])
fi

dnl Look for a sufficiently recent version of Perl.
LLVM_PROG_PERL([5.006])
AC_SUBST(PERL)
if test x"$PERL" = xnone; then
   AC_SUBST(HAVE_PERL,0)
   AC_MSG_ERROR([perl is required but was not found, please install it])
else
   AC_SUBST(HAVE_PERL,1)
fi

dnl Find the install program
AC_PROG_INSTALL

dnl Checks for documentation and testing tools that we can do without. If these
dnl are not found then they are set to "true" which always succeeds but does
dnl nothing. This just lets the build output show that we could have done 
dnl something if the tool was available. 
AC_PATH_PROG(BZIP2,[bzip2],[echo "Skipped: bzip2 not found"])
AC_PATH_PROG(DOXYGEN,[doxygen],[echo "Skipped: doxygen not found"])
AC_PATH_PROG(GROFF,[groff],[echo "Skipped: groff not found"])
AC_PATH_PROG(GZIP,[gzip],[echo "Skipped: gzip not found"])
AC_PATH_PROG(POD2HTML,[pod2html],[echo "Skipped: pod2html not found"])
AC_PATH_PROG(POD2MAN,[pod2man],[echo "Skipped: pod2man not found"])
AC_PATH_PROG(RUNTEST,[runtest],[echo "Skipped: runtest not found"])
DJ_AC_PATH_TCLSH
AC_PATH_PROG(ZIP,[zip],[echo "Skipped: zip not found"])

dnl Determine if the linker supports the -R option.
AC_LINK_USE_R

dnl Check for libtool and the library that has dlopen function (which must come
dnl before the AC_PROG_LIBTOOL check in order to enable dlopening libraries with
dnl libtool).
AC_LIBTOOL_DLOPEN
AC_LIB_LTDL
AC_PROG_LIBTOOL

if test "$lt_cv_dlopen_self" = "yes" ; then
  AC_DEFINE([CAN_DLOPEN_SELF],[1],
              [Define if dlopen(0) will open the symbols of the program])
fi

dnl Check if we know how to tell etags we are using C++:
etags_version=`$ETAGS --version 2>&1`
case "$etags_version" in
	*[Ee]xuberant*) ETAGSFLAGS="--language-force=c++" ;;
	*GNU\ Emacs*) ETAGSFLAGS="-l c++" ;;
	*) ETAGSFLAGS="" ;;
esac
AC_SUBST(ETAGSFLAGS,$ETAGSFLAGS)

if test "$WITH_LLVMGCCDIR" = "default" ; then
  LLVMGCC="llvm-gcc${EXEEXT}"
  LLVMGXX="llvm-g++${EXEEXT}"
  AC_PATH_PROG(LLVMGCC, $LLVMGCC, [])
  AC_PATH_PROG(LLVMGXX, $LLVMGXX, [])
else
  LLVMGCC="$WITH_LLVMGCCDIR/bin/llvm-gcc${EXEEXT}"
  LLVMGXX="$WITH_LLVMGCCDIR/bin/llvm-g++${EXEEXT}"
  AC_SUBST(LLVMGCC,$LLVMGCC)
  AC_SUBST(LLVMGXX,$LLVMGXX)
fi
  
AC_MSG_CHECKING([tool compatibility])

dnl Ensure that compilation tools are GCC or a GNU compatible compiler such as
dnl ICC; we use GCC specific options in the makefiles so the compiler needs
dnl to support those options.
dnl "icc" emits gcc signatures
dnl "icc -no-gcc" emits no gcc signature BUT is still compatible
ICC=no
IXX=no
case $CC in
  icc*|icpc*) 
    ICC=yes
    IXX=yes
    ;;
   *)
    ;;
esac

if test "$GCC" != "yes" && test "$ICC" != "yes"
then
  AC_MSG_ERROR([gcc|icc required but not found])
fi

dnl Ensure that compilation tools are GCC; we use GCC specific extensions
if test "$GXX" != "yes" && test "$IXX" != "yes"
then
  AC_MSG_ERROR([g++|icc required but not found])
fi

dnl Verify that GCC is version 3.0 or higher
if test "$GCC" = "yes"
then
  gccmajor=`$CC --version | head -n 1 | sed 's/[[^0-9]]*\([[0-9.]]\).*/\1/'` 
  if test "$gccmajor" -lt "3"
  then
    AC_MSG_ERROR([gcc 3.x required, but you have a lower version])
  fi
fi

dnl Check for GNU Make.  We use its extensions, so don't build without it
if test -z "$llvm_cv_gnu_make_command"
then
  AC_MSG_ERROR([GNU Make required but not found])
fi

dnl Tool compatibility is okay if we make it here.
AC_MSG_RESULT([ok])

dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 5: Check for libraries
dnl===
dnl===-----------------------------------------------------------------------===

dnl libelf is for sparc only; we can ignore it if we don't have it
AC_CHECK_LIB(elf, elf_begin)
AC_CHECK_LIB(m,sin)
if test "$llvm_cv_os_type" = "MingW" ; then
  AC_CHECK_LIB(imagehlp, main)
  AC_CHECK_LIB(psapi, main)
fi

dnl lt_dlopen may be required for plugin support.
AC_SEARCH_LIBS(lt_dlopen,ltdl,AC_DEFINE([HAVE_LT_DLOPEN],[1],
              [Define if lt_dlopen() is available on this platform]),
              AC_MSG_WARN([lt_dlopen() not found - plugin support might 
                           not be available]))

dnl dlopen() is required for plugin support.
AC_SEARCH_LIBS(dlopen,dl,AC_DEFINE([HAVE_DLOPEN],[1],
               [Define if dlopen() is available on this platform.]),
               AC_MSG_WARN([dlopen() not found - disabling plugin support]))

dnl mallinfo is optional; the code can compile (minus features) without it
AC_SEARCH_LIBS(mallinfo,malloc,AC_DEFINE([HAVE_MALLINFO],[1],
               [Define if mallinfo() is available on this platform.]))

dnl pthread locking functions are optional - but llvm will not be thread-safe
dnl without locks.
if test "$ENABLE_THREADS" -eq 1 ; then
  AC_CHECK_LIB(pthread,pthread_mutex_init)
  AC_SEARCH_LIBS(pthread_mutex_lock,pthread,
                 AC_DEFINE([HAVE_PTHREAD_MUTEX_LOCK],[1],
                           [Have pthread_mutex_lock]))
fi

dnl Allow extra x86-disassembler library
AC_ARG_WITH(udis86,
  AS_HELP_STRING([--with-udis86=<path>],
    [Use udis86 external x86 disassembler library]),
    [
      AC_SUBST(USE_UDIS86, [1])
      case "$withval" in
        /usr/lib|yes) ;;
        *) LDFLAGS="$LDFLAGS -L${withval}" ;;
      esac
      AC_CHECK_LIB(udis86, ud_init, [], [
        echo "Error! You need to have libudis86 around."
        exit -1
      ])
    ],
    AC_SUBST(USE_UDIS86, [0]))
AC_DEFINE_UNQUOTED([USE_UDIS86],$USE_UDIS86,
                   [Define if use udis86 library])

dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 6: Check for header files
dnl===
dnl===-----------------------------------------------------------------------===

dnl First, use autoconf provided macros for specific headers that we need
dnl We don't check for ancient stuff or things that are guaranteed to be there
dnl by the C++ standard. We always use the <cfoo> versions of <foo.h> C headers.
dnl Generally we're looking for POSIX headers.
AC_HEADER_DIRENT
AC_HEADER_MMAP_ANONYMOUS
AC_HEADER_STAT
AC_HEADER_STDC
AC_HEADER_SYS_WAIT
AC_HEADER_TIME

AC_CHECK_HEADERS([dlfcn.h execinfo.h fcntl.h inttypes.h limits.h link.h])
AC_CHECK_HEADERS([malloc.h setjmp.h signal.h stdint.h unistd.h utime.h])
AC_CHECK_HEADERS([windows.h])
AC_CHECK_HEADERS([sys/mman.h sys/param.h sys/resource.h sys/time.h])
AC_CHECK_HEADERS([sys/types.h malloc/malloc.h mach/mach.h])
if test "$ENABLE_THREADS" -eq 1 ; then
  AC_CHECK_HEADERS(pthread.h,
                  AC_SUBST(HAVE_PTHREAD, 1),
		   AC_SUBST(HAVE_PTHREAD, 0))
else
  AC_SUBST(HAVE_PTHREAD, 0)
fi

dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 7: Check for types and structures
dnl===
dnl===-----------------------------------------------------------------------===

AC_HUGE_VAL_CHECK
AC_TYPE_PID_T
AC_TYPE_SIZE_T
AC_TYPE_SIGNAL
AC_STRUCT_TM
AC_CHECK_TYPES([int64_t],,AC_MSG_ERROR([Type int64_t required but not found]))
AC_CHECK_TYPES([uint64_t],,
         AC_CHECK_TYPES([u_int64_t],,
         AC_MSG_ERROR([Type uint64_t or u_int64_t required but not found])))

dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 8: Check for specific functions needed
dnl===
dnl===-----------------------------------------------------------------------===

AC_CHECK_FUNCS([backtrace ceilf floorf roundf rintf nearbyintf getcwd ])
AC_CHECK_FUNCS([powf fmodf strtof round ])
AC_CHECK_FUNCS([getpagesize getrusage getrlimit setrlimit gettimeofday ])
AC_CHECK_FUNCS([isatty mkdtemp mkstemp ])
AC_CHECK_FUNCS([mktemp realpath sbrk setrlimit strdup strerror strerror_r ])
AC_CHECK_FUNCS([strtoll strtoq sysconf malloc_zone_statistics ])
AC_CHECK_FUNCS([setjmp longjmp sigsetjmp siglongjmp])
AC_C_PRINTF_A
AC_FUNC_ALLOCA
AC_FUNC_RAND48

dnl Check for variations in the Standard C++ library and STL. These macros are
dnl provided by LLVM in the autoconf/m4 directory.
AC_CXX_HAVE_HASH_MAP
AC_CXX_HAVE_HASH_SET
AC_CXX_HAVE_STD_ITERATOR
AC_CXX_HAVE_BI_ITERATOR
AC_CXX_HAVE_FWD_ITERATOR
AC_FUNC_ISNAN
AC_FUNC_ISINF

dnl Check for mmap support.We also need to know if /dev/zero is required to 
dnl be opened for allocating RWX memory.  
dnl Make sure we aren't attempting to configure for an unknown system
if test "$llvm_cv_platform_type" = "Unix" ; then
  AC_FUNC_MMAP 
  AC_FUNC_MMAP_FILE
  AC_NEED_DEV_ZERO_FOR_MMAP

  if test "$ac_cv_func_mmap_fixed_mapped" = "no"
  then
    AC_MSG_WARN([mmap() of a fixed address required but not supported])
  fi
  if test "$ac_cv_func_mmap_file" = "no"
  then
    AC_MSG_WARN([mmap() of files required but not found])
  fi
fi

dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 9: Additional checks, variables, etc.
dnl===
dnl===-----------------------------------------------------------------------===

dnl Check, whether __dso_handle is present
AC_CHECK_FUNCS([__dso_handle])

dnl See if the llvm-gcc executable can compile to LLVM assembly
AC_CACHE_CHECK([whether llvm-gcc is sane],[llvm_cv_llvmgcc_sanity],
[llvm_cv_llvmgcc_sanity="no"
if test -x "$LLVMGCC" ; then
  cp /dev/null conftest.c
  "$LLVMGCC" -emit-llvm -S -o - conftest.c | \
      grep 'target datalayout =' > /dev/null 2>&1
  if test $? -eq 0 ; then
    llvm_cv_llvmgcc_sanity="yes"
  fi
  rm conftest.c
fi])

dnl Since we have a sane llvm-gcc, identify it and its sub-tools 
if test "$llvm_cv_llvmgcc_sanity" = "yes" ; then
  AC_MSG_CHECKING([llvm-gcc component support])
  llvmcc1path=`"$LLVMGCC" --print-prog-name=cc1`
  AC_SUBST(LLVMCC1,$llvmcc1path)
  llvmcc1pluspath=`"$LLVMGCC" --print-prog-name=cc1plus`
  AC_SUBST(LLVMCC1PLUS,$llvmcc1pluspath)
  llvmgccdir=`echo "$llvmcc1path" | sed 's,/libexec/.*,,'`
  AC_SUBST(LLVMGCCDIR,$llvmgccdir)
  llvmgcclibexec=`echo "$llvmcc1path" | sed 's,/cc1,,'`
  AC_SUBST(LLVMGCCLIBEXEC,$llvmgcclibexec)
  llvmgccversion=[`"$LLVMGCC" -dumpversion 2>&1 | sed 's/^\([0-9.]*\).*/\1/'`]
  llvmgccmajvers=[`echo $llvmgccversion | sed 's/^\([0-9]\).*/\1/'`]
  AC_SUBST(LLVMGCC_VERSION,$llvmgccversion)
  AC_SUBST(LLVMGCC_MAJVERS,$llvmgccmajvers)
  llvmgcclangs=[`"$LLVMGCC" -v --help 2>&1 | grep '^Configured with:' | sed 's/^.*--enable-languages=\([^ -]*\).*/\1/'`]
  AC_SUBST(LLVMGCC_LANGS,$llvmgcclangs)
  AC_MSG_RESULT([ok])
fi

dnl Propagate the shared library extension that the libltdl checks did to 
dnl the Makefiles so we can use it there too
AC_SUBST(SHLIBEXT,$libltdl_cv_shlibext)

# Translate the various configuration directories and other basic
# information into substitutions that will end up in Makefile.config.in 
# that these configured values can be used by the makefiles
if test "${prefix}" = "NONE" ; then
  prefix="/usr/local"
fi
eval LLVM_PREFIX="${prefix}";
eval LLVM_BINDIR="${prefix}/bin";
eval LLVM_LIBDIR="${prefix}/lib";
eval LLVM_DATADIR="${prefix}/share/llvm";
eval LLVM_DOCSDIR="${prefix}/docs/llvm";
eval LLVM_ETCDIR="${prefix}/etc/llvm";
eval LLVM_INCLUDEDIR="${prefix}/include";
eval LLVM_INFODIR="${prefix}/info";
eval LLVM_MANDIR="${prefix}/man";
LLVM_CONFIGTIME=`date`
AC_SUBST(LLVM_PREFIX)
AC_SUBST(LLVM_BINDIR)
AC_SUBST(LLVM_LIBDIR)
AC_SUBST(LLVM_DATADIR)
AC_SUBST(LLVM_DOCSDIR)
AC_SUBST(LLVM_ETCDIR)
AC_SUBST(LLVM_INCLUDEDIR)
AC_SUBST(LLVM_INFODIR)
AC_SUBST(LLVM_MANDIR)
AC_SUBST(LLVM_CONFIGTIME)

# Place the various directores into the config.h file as #defines so that we
# can know about the installation paths within LLVM.
AC_DEFINE_UNQUOTED(LLVM_PREFIX,"$LLVM_PREFIX", 
                   [Installation prefix directory])
AC_DEFINE_UNQUOTED(LLVM_BINDIR, "$LLVM_BINDIR", 
                   [Installation directory for binary executables])
AC_DEFINE_UNQUOTED(LLVM_LIBDIR, "$LLVM_LIBDIR", 
                   [Installation directory for libraries])
AC_DEFINE_UNQUOTED(LLVM_DATADIR, "$LLVM_DATADIR", 
                   [Installation directory for data files])
AC_DEFINE_UNQUOTED(LLVM_DATADIR, "$LLVM_DOCSDIR", 
                   [Installation directory for documentation])
AC_DEFINE_UNQUOTED(LLVM_ETCDIR, "$LLVM_ETCDIR", 
                   [Installation directory for config files])
AC_DEFINE_UNQUOTED(LLVM_INCLUDEDIR, "$LLVM_INCLUDEDIR", 
                   [Installation directory for include files])
AC_DEFINE_UNQUOTED(LLVM_INFODIR, "$LLVM_INFODIR", 
                   [Installation directory for .info files])
AC_DEFINE_UNQUOTED(LLVM_MANDIR, "$LLVM_MANDIR", 
                   [Installation directory for man pages])
AC_DEFINE_UNQUOTED(LLVM_CONFIGTIME, "$LLVM_CONFIGTIME", 
                   [Time at which LLVM was configured])

dnl===-----------------------------------------------------------------------===
dnl===
dnl=== SECTION 10: Specify the output files and generate it
dnl===
dnl===-----------------------------------------------------------------------===

dnl Configure header files
dnl WARNING: dnl If you add or remove any of the following config headers, then
dnl you MUST also update Makefile.rules so that the variable FilesToConfig
dnl contains the same list of files as AC_CONFIG_HEADERS below. This ensures the
dnl files can be updated automatically when their *.in sources change.
AC_CONFIG_HEADERS([include/llvm/Config/config.h])
AC_CONFIG_HEADERS([include/llvm/Support/DataTypes.h])
AC_CONFIG_HEADERS([include/llvm/ADT/hash_map])
AC_CONFIG_HEADERS([include/llvm/ADT/hash_set])
AC_CONFIG_HEADERS([include/llvm/ADT/iterator])

dnl Configure the makefile's configuration data
AC_CONFIG_FILES([Makefile.config])

dnl Configure the RPM spec file for LLVM
AC_CONFIG_FILES([llvm.spec])

dnl Configure doxygen's configuration file
AC_CONFIG_FILES([docs/doxygen.cfg])

dnl Do the first stage of configuration for llvm-config.in.
AC_CONFIG_FILES([tools/llvm-config/llvm-config.in])

dnl Do special configuration of Makefiles
AC_CONFIG_COMMANDS([setup],,[llvm_src="${srcdir}"])
AC_CONFIG_MAKEFILE(Makefile)
AC_CONFIG_MAKEFILE(Makefile.common)
AC_CONFIG_MAKEFILE(examples/Makefile)
AC_CONFIG_MAKEFILE(lib/Makefile)
AC_CONFIG_MAKEFILE(runtime/Makefile)
AC_CONFIG_MAKEFILE(test/Makefile)
AC_CONFIG_MAKEFILE(test/Makefile.tests)
AC_CONFIG_MAKEFILE(tools/Makefile)
AC_CONFIG_MAKEFILE(utils/Makefile)
AC_CONFIG_MAKEFILE(projects/Makefile)

dnl Finally, crank out the output
AC_OUTPUT