File: configure.ac

package info (click to toggle)
libsodium 1.0.11-2
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 6,052 kB
  • ctags: 6,432
  • sloc: ansic: 29,991; asm: 4,256; makefile: 799; sh: 425; xml: 30; pascal: 10
file content (706 lines) | stat: -rw-r--r-- 22,830 bytes parent folder | download | duplicates (2)
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
AC_PREREQ([2.65])
AC_INIT([libsodium],[1.0.11],
  [https://github.com/jedisct1/libsodium/issues],
  [libsodium],
  [https://github.com/jedisct1/libsodium])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_SRCDIR([src/libsodium/sodium/version.c])
AC_CANONICAL_HOST
AM_INIT_AUTOMAKE([1.11 dist-bzip2 tar-ustar foreign subdir-objects])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
AM_MAINTAINER_MODE
AM_DEP_TRACK

AC_SUBST(VERSION)
ISODATE=`date +%Y-%m-%d`
AC_SUBST(ISODATE)

SODIUM_LIBRARY_VERSION_MAJOR=9
SODIUM_LIBRARY_VERSION_MINOR=3
DLL_VERSION=8
SODIUM_LIBRARY_VERSION=19:1:1
#                       | | |
#                +------+ | +---+
#                |        |     |
#             current:revision:age
#                |        |     |
#                |        |     +- increment if interfaces have been added
#                |        |        set to zero if interfaces have been removed
#                |        |        or changed
#                |        +- increment if source code has changed
#                |           set to zero if current is incremented
#                +- increment if interfaces have been added, removed or changed
AC_SUBST(SODIUM_LIBRARY_VERSION_MAJOR)
AC_SUBST(SODIUM_LIBRARY_VERSION_MINOR)
AC_SUBST(SODIUM_LIBRARY_VERSION)
AC_SUBST(DLL_VERSION)

LX_CFLAGS=${CFLAGS-NONE}

dnl Path check

AS_IF([pwd | fgrep ' ' > /dev/null 2>&1],
  [AC_MSG_ERROR([The build directory contains whitespaces - This can cause tests/installation to fail due to limitations of some libtool versions])]
)

dnl Switches

AC_ARG_ENABLE(ssp,
[AS_HELP_STRING(--disable-ssp,Do not compile with -fstack-protector)],
[
  AS_IF([test "x$enableval" = "xno"], [
    enable_ssp="no"
  ], [
    enable_ssp="yes"
  ])
],
[
  enable_ssp="yes"
])

AC_ARG_ENABLE(asm,
[AS_HELP_STRING(--disable-asm,Disable assembly implementations)],
[
  AS_IF([test "x$enableval" = "xno"], [
    enable_asm="no"
  ], [
    enable_asm="yes"
  ])
],
[
  enable_asm="yes"
])

AS_IF([test "x$EMSCRIPTEN" != "x"], [
  enable_asm="no"
  AC_MSG_WARN([compiling to JavaScript - asm implementations disabled])
])
AS_IF([test "$host_os" = "nacl" -o "$host_os" = "pnacl"], [
  enable_asm="no"
  AC_MSG_WARN([compiling to Native Client - asm implementations disabled])
])

AC_ARG_ENABLE(pie,
[AS_HELP_STRING(--disable-pie,Do not produce position independent executables)],
 enable_pie=$enableval, enable_pie="maybe")

AS_CASE([$host_os], [mingw*|cygwin*|msys], [enable_pie="no"])

AC_ARG_ENABLE(blocking-random,
[AS_HELP_STRING(--enable-blocking-random,Enable this switch only if /dev/urandom is totally broken on the target platform)],
[
  AS_IF([test "x$enableval" = "xyes"], [
    AC_DEFINE([USE_BLOCKING_RANDOM], [1], [/dev/urandom is insecure on the target platform])
  ])
])

AC_ARG_ENABLE(minimal,
[AS_HELP_STRING(--enable-minimal,
  [Only compile the minimum set of functions required for the high-level API])],
[
  AS_IF([test "x$enableval" = "xyes"], [
    enable_minimal="yes"
  ], [
    enable_minimal="no"
  ])
],
[
  enable_minimal="no"
])
AM_CONDITIONAL([MINIMAL], [test x$enable_minimal = xyes])

AC_ARG_WITH(pthreads, AC_HELP_STRING([--with-pthreads],
 [use pthreads library, or --without-pthreads to disable threading support.]),
 [ ], [withval="yes"])

AS_IF([test "x$withval" = "xyes"], [
  AX_PTHREAD([
    AC_DEFINE([HAVE_PTHREAD], [1], [Define if you have POSIX threads libraries and header files])
    LIBS="$PTHREAD_LIBS $LIBS"
    CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
    CC="$PTHREAD_CC"])
])

AC_ARG_WITH(safecode,
[AS_HELP_STRING(--with-safecode,For maintainers only - please do not use)],
[AS_IF([test "x$withval" = "xyes"], [
    AC_ARG_VAR([SAFECODE_HOME], [set to the safecode base directory])
    : ${SAFECODE_HOME:=/opt/safecode}
    LDFLAGS="$LDFLAGS -L${SAFECODE_HOME}/lib"
    LIBS="$LIBS -lsc_dbg_rt -lpoolalloc_bitmap -lstdc++"
    CFLAGS="$CFLAGS -fmemsafety"
  ])
])

AC_ARG_ENABLE(debug,
[AS_HELP_STRING(--enable-debug,For maintainers only - please do not use)],
[
  AS_IF([test "x$enableval" = "xyes"], [
    AS_IF([test "x$LX_CFLAGS" = "xNONE"], [
      nxflags=""
      for flag in `echo $CFLAGS`; do
        AS_CASE([$flag],
          [-O*], [ ],
          [-g*], [ ],
          [*], [AS_VAR_APPEND([nxflags], [" $flag"])])
      done
      CFLAGS="$nxflags -O0 -g3"
    ])
    CPPFLAGS="$CPPFLAGS -DDEBUG=1"
  ])
])

AC_ARG_ENABLE(opt,
[AS_HELP_STRING(--enable-opt,Optimize for the native CPU - The resulting library will be faster but not portable)],
[
  AS_IF([test "x$enableval" = "xyes"], [
    CFLAGS="$CFLAGS -O3 -march=native"
    LDFLAGS="$LDFLAGS -O3 -march=native"])
])

AC_SUBST([MAINT])

AX_VALGRIND_CHECK

dnl Checks

AC_PROG_CC_C99
AM_PROG_AS
AC_USE_SYSTEM_EXTENSIONS

AC_CHECK_DEFINE([__native_client__], [NATIVECLIENT="yes"], [])

AC_CHECK_DEFINE([_FORTIFY_SOURCE], [], [
  AX_CHECK_COMPILE_FLAG([-D_FORTIFY_SOURCE=2],
    [CPPFLAGS="$CPPFLAGS -D_FORTIFY_SOURCE=2"])
])

AX_CHECK_COMPILE_FLAG([-fvisibility=hidden],
  [CFLAGS="$CFLAGS -fvisibility=hidden"])

AS_CASE([$host_os], [cygwin*|mingw*|msys|pw32*|cegcc*], [ ], [
  AX_CHECK_COMPILE_FLAG([-fPIC], [
    AX_CHECK_LINK_FLAG([-fPIC],
      [CFLAGS="$CFLAGS -fPIC"]
    )
  ])
])

AS_IF([test "$enable_pie" != "no"],[
  AX_CHECK_COMPILE_FLAG([-fPIE], [
    AX_CHECK_LINK_FLAG([-fPIE],
      [AX_CHECK_LINK_FLAG([-pie],
        [CFLAGS="$CFLAGS -fPIE"
         LDFLAGS="$LDFLAGS -pie"])
    ])
  ])
])

AX_CHECK_COMPILE_FLAG([-fno-strict-aliasing], [CFLAGS="$CFLAGS -fno-strict-aliasing"])
AX_CHECK_COMPILE_FLAG([-fno-strict-overflow], [CFLAGS="$CFLAGS -fno-strict-overflow"], [
  AX_CHECK_COMPILE_FLAG([-fwrapv], [CFLAGS="$CFLAGS -fwrapv"])
])

AS_IF([test "$GCC" = "yes" ], [
  AS_CASE([$host_cpu],
    [i?86|amd64|x86_64], [
      AC_COMPILE_IFELSE(
        [AC_LANG_SOURCE([
#if !defined(__clang__) && defined(__GNUC__) && ((__GNUC__ << 8) | __GNUC_MINOR__) < 0x403
# error old gcc
#endif
int main(void) { return 0; }
         ])],,[
          AX_CHECK_COMPILE_FLAG([-flax-vector-conversions], [CFLAGS="$CFLAGS -flax-vector-conversions"])
        ])
      ]
    )
  ])

LIBTOOL_OLD_FLAGS="$LIBTOOL_EXTRA_FLAGS"
LIBTOOL_EXTRA_FLAGS="$LIBTOOL_EXTRA_FLAGS -version-info $SODIUM_LIBRARY_VERSION"
AC_ARG_ENABLE(soname-versions,
  [AC_HELP_STRING([--enable-soname-versions], [enable soname versions (must be disabled for Android) (default: enabled)])],
    [
        AS_IF([test "x$enableval" = "xno"], [
          LIBTOOL_EXTRA_FLAGS="$LIBTOOL_OLD_FLAGS -avoid-version"
        ])
    ]
)

AS_CASE([$host_os],
  [cygwin*|mingw*|msys|pw32*|cegcc*], [
    AX_CHECK_LINK_FLAG([-Wl,--dynamicbase], [LDFLAGS="$LDFLAGS -Wl,--dynamicbase"])
    AX_CHECK_LINK_FLAG([-Wl,--high-entropy-va], [LDFLAGS="$LDFLAGS -Wl,--high-entropy-va"])
    AX_CHECK_LINK_FLAG([-Wl,--nxcompat], [LDFLAGS="$LDFLAGS -Wl,--nxcompat"])
  ])

AS_IF([test "x$enable_ssp" != "xno"],[

AS_CASE([$host_os],
  [cygwin*|mingw*|msys|pw32*|cegcc*], [ ],
  [*], [
    AX_CHECK_COMPILE_FLAG([-fstack-protector], [
      AX_CHECK_LINK_FLAG([-fstack-protector],
        [CFLAGS="$CFLAGS -fstack-protector"]
      )
    ])
  ])
])

AX_CHECK_COMPILE_FLAG([-Wwrite-strings], [CFLAGS="$CFLAGS -Wwrite-strings"])
AX_CHECK_COMPILE_FLAG([-Wdiv-by-zero], [CFLAGS="$CFLAGS -Wdiv-by-zero"])
AX_CHECK_COMPILE_FLAG([-Wsometimes-uninitialized], [CFLAGS="$CFLAGS -Wsometimes-uninitialized"])

AC_ARG_VAR([CWFLAGS], [define to compilation flags for generating extra warnings])

AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wall], [CWFLAGS="$CWFLAGS -Wall"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wextra], [CWFLAGS="$CWFLAGS -Wextra"])

AC_MSG_CHECKING(for clang)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[
#ifndef __clang__
be sad
#endif
]])],
  [AC_MSG_RESULT(yes)
   AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wno-unknown-warning-option],
     [CWFLAGS="$CWFLAGS -Wno-unknown-warning-option"])
  ],
  [AC_MSG_RESULT(no)
])

AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wbad-function-cast], [CWFLAGS="$CWFLAGS -Wbad-function-cast"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wcast-align], [CWFLAGS="$CWFLAGS -Wcast-align"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wcast-qual], [CWFLAGS="$CWFLAGS -Wcast-qual"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wduplicated-cond], [CWFLAGS="$CWFLAGS -Wduplicated-cond"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wfloat-equal], [CWFLAGS="$CWFLAGS -Wfloat-equal"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wformat=2], [CWFLAGS="$CWFLAGS -Wformat=2"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wmissing-declarations], [CWFLAGS="$CWFLAGS -Wmissing-declarations"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wmissing-prototypes], [CWFLAGS="$CWFLAGS -Wmissing-prototypes"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wnested-externs], [CWFLAGS="$CWFLAGS -Wnested-externs"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wno-unknown-pragmas], [CWFLAGS="$CWFLAGS -Wno-unknown-pragmas"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wnormalized=id], [CWFLAGS="$CWFLAGS -Wnormalized=id"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wnull-dereference], [CWFLAGS="$CWFLAGS -Wnull-dereference"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wpointer-arith], [CWFLAGS="$CWFLAGS -Wpointer-arith"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wredundant-decls], [CWFLAGS="$CWFLAGS -Wredundant-decls"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wstrict-prototypes], [CWFLAGS="$CWFLAGS -Wstrict-prototypes"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wswitch-enum], [CWFLAGS="$CWFLAGS -Wswitch-enum"])
AX_CHECK_COMPILE_FLAG([$CWFLAGS -Wvariable-decl], [CWFLAGS="$CWFLAGS -Wvariable-decl"])

AX_CHECK_LINK_FLAG([-Wl,-z,relro], [LDFLAGS="$LDFLAGS -Wl,-z,relro"])
AX_CHECK_LINK_FLAG([-Wl,-z,now], [LDFLAGS="$LDFLAGS -Wl,-z,now"])
AX_CHECK_LINK_FLAG([-Wl,-z,noexecstack], [LDFLAGS="$LDFLAGS -Wl,-z,noexecstack"])

LT_INIT
AC_SUBST(LIBTOOL_DEPS)

AC_ARG_VAR([AR], [path to the ar utility])
AC_CHECK_TOOL([AR], [ar], [ar])

dnl Checks for headers

AS_IF([test "x$EMSCRIPTEN" = "x" -a "$host_os" != "pnacl"], [

  AC_MSG_CHECKING(for MMX instructions set)
  oldcflags="$CFLAGS"
  AX_CHECK_COMPILE_FLAG([-mmmx], [CFLAGS="$CFLAGS -mmmx"])
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#pragma GCC target("mmx")
#include <mmintrin.h>
]], [[ __m64 x = _mm_setzero_si64(); ]])],
    [AC_MSG_RESULT(yes)
     AC_DEFINE([HAVE_MMINTRIN_H], [1], [mmx is available])
     AX_CHECK_COMPILE_FLAG([-mmmx], [CFLAGS_MMX="-mmmx"])],
    [AC_MSG_RESULT(no)])
  CFLAGS="$oldcflags"

  AC_MSG_CHECKING(for SSE2 instructions set)
  oldcflags="$CFLAGS"
  AX_CHECK_COMPILE_FLAG([-msse2], [CFLAGS="$CFLAGS -msse2"])
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#pragma GCC target("sse2")
#ifndef __SSE2__
# define __SSE2__
#endif
#include <emmintrin.h>
]], [[ __m128d x = _mm_setzero_pd();
       __m128i y = _mm_srli_epi64(_mm_setzero_si128(), 26); ]])],
    [AC_MSG_RESULT(yes)
     AC_DEFINE([HAVE_EMMINTRIN_H], [1], [sse2 is available])
     AX_CHECK_COMPILE_FLAG([-msse2], [CFLAGS_SSE2="-msse2"])],
    [AC_MSG_RESULT(no)])
  CFLAGS="$oldcflags"

  oldcflags="$CFLAGS"
  AX_CHECK_COMPILE_FLAG([-msse3], [CFLAGS="$CFLAGS -msse3"])
  AC_MSG_CHECKING(for SSE3 instructions set)
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#pragma GCC target("sse3")
#include <pmmintrin.h>
]], [[ __m128 x = _mm_addsub_ps(_mm_cvtpd_ps(_mm_setzero_pd()),
                                _mm_cvtpd_ps(_mm_setzero_pd())); ]])],
    [AC_MSG_RESULT(yes)
     AC_DEFINE([HAVE_PMMINTRIN_H], [1], [sse3 is available])
     AX_CHECK_COMPILE_FLAG([-msse3], [CFLAGS_SSE3="-msse3"])],
    [AC_MSG_RESULT(no)])
  CFLAGS="$oldcflags"

  oldcflags="$CFLAGS"
  AX_CHECK_COMPILE_FLAG([-mssse3], [CFLAGS="$CFLAGS -mssse3"])
  AC_MSG_CHECKING(for SSSE3 instructions set)
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#pragma GCC target("ssse3")
#include <tmmintrin.h>
]], [[ __m64 x = _mm_abs_pi32(_m_from_int(0)); ]])],
    [AC_MSG_RESULT(yes)
     AC_DEFINE([HAVE_TMMINTRIN_H], [1], [ssse3 is available])
     AX_CHECK_COMPILE_FLAG([-mssse3], [CFLAGS_SSSE3="-mssse3"])],
    [AC_MSG_RESULT(no)])
  CFLAGS="$oldcflags"

  oldcflags="$CFLAGS"
  AX_CHECK_COMPILE_FLAG([-msse4.1], [CFLAGS="$CFLAGS -msse4.1"])
  AC_MSG_CHECKING(for SSE4.1 instructions set)
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#pragma GCC target("sse4.1")
#include <smmintrin.h>
]], [[ __m128i x = _mm_minpos_epu16(_mm_setzero_si128()); ]])],
    [AC_MSG_RESULT(yes)
     AC_DEFINE([HAVE_SMMINTRIN_H], [1], [sse4.1 is available])
     AX_CHECK_COMPILE_FLAG([-msse4.1], [CFLAGS_SSE41="-msse4.1"])],
    [AC_MSG_RESULT(no)])
  CFLAGS="$oldcflags"

  oldcflags="$CFLAGS"
  AX_CHECK_COMPILE_FLAG([-mavx], [CFLAGS="$CFLAGS -mavx"])
  AC_MSG_CHECKING(for AVX instructions set)
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#ifdef __native_client__
# error NativeClient detected - Avoiding AVX opcodes
#endif
#pragma GCC target("avx")
#include <immintrin.h>
]], [[ _mm256_zeroall(); ]])],
    [AC_MSG_RESULT(yes)
     AC_DEFINE([HAVE_AVXINTRIN_H], [1], [AVX is available])
     AX_CHECK_COMPILE_FLAG([-mavx], [CFLAGS_AVX="-mavx"])],
    [AC_MSG_RESULT(no)])
  CFLAGS="$oldcflags"

  oldcflags="$CFLAGS"
  AX_CHECK_COMPILE_FLAG([-mavx2], [CFLAGS="$CFLAGS -mavx2"])
  AC_MSG_CHECKING(for AVX2 instructions set)
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#ifdef __native_client__
# error NativeClient detected - Avoiding AVX2 opcodes
#endif
#pragma GCC target("avx2")
#include <immintrin.h>
]], [[ __m256i x = _mm256_abs_epi8(_mm256_setzero_si256()); ]])],
    [AC_MSG_RESULT(yes)
     AC_DEFINE([HAVE_AVX2INTRIN_H], [1], [AVX2 is available])
     AX_CHECK_COMPILE_FLAG([-mavx2], [CFLAGS_AVX="-mavx2"])
     AC_MSG_CHECKING(if _mm256_broadcastsi128_si256 is correctly defined)
     AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#ifdef __native_client__
# error NativeClient detected - Avoiding AVX2 opcodes
#endif
#pragma GCC target("avx2")
#include <immintrin.h>
     ]], [[ __m256i y = _mm256_broadcastsi128_si256(_mm_setzero_si128()); ]])],
       [AC_MSG_RESULT(yes)],
       [AC_MSG_RESULT(no)
        AC_DEFINE([_mm256_broadcastsi128_si256], [_mm_broadcastsi128_si256],
                  [Define to the local name of _mm256_broadcastsi128_si256])])
     ],
    [AC_MSG_RESULT(no)])
  CFLAGS="$oldcflags"

  oldcflags="$CFLAGS"
  AX_CHECK_COMPILE_FLAG([-maes], [CFLAGS="$CFLAGS -maes"])
  AX_CHECK_COMPILE_FLAG([-mpclmul], [CFLAGS="$CFLAGS -mpclmul"])
  AC_MSG_CHECKING(for AESNI instructions set and PCLMULQDQ)
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#ifdef __native_client__
# error NativeClient detected - Avoiding AESNI opcodes
#endif
#pragma GCC target("aes")
#pragma GCC target("pclmul")
#include <wmmintrin.h>
]], [[ __m128i x = _mm_aesimc_si128(_mm_setzero_si128());
       __m128i y = _mm_clmulepi64_si128(_mm_setzero_si128(), _mm_setzero_si128(), 0);]])],
    [AC_MSG_RESULT(yes)
     AC_DEFINE([HAVE_WMMINTRIN_H], [1], [aesni is available])
     AX_CHECK_COMPILE_FLAG([-maes], [CFLAGS_AESNI="-maes"])
     AX_CHECK_COMPILE_FLAG([-mpclmul], [CFLAGS_PCLMUL="-mpclmul"])
     ],
    [AC_MSG_RESULT(no)])
  CFLAGS="$oldcflags"

])

AC_SUBST(CFLAGS_MMX)
AC_SUBST(CFLAGS_SSE2)
AC_SUBST(CFLAGS_SSE3)
AC_SUBST(CFLAGS_SSSE3)
AC_SUBST(CFLAGS_SSE41)
AC_SUBST(CFLAGS_AVX)
AC_SUBST(CFLAGS_AVX2)
AC_SUBST(CFLAGS_AESNI)
AC_SUBST(CFLAGS_PCLMUL)

AC_CHECK_HEADERS([sys/mman.h])

dnl Checks for typedefs, structures, and compiler characteristics.

AC_C_INLINE
AS_CASE([$host_cpu],
  [i?86|amd64|x86_64],
    [ac_cv_c_bigendian=no]
)
AC_C_BIGENDIAN(
  AC_DEFINE(NATIVE_BIG_ENDIAN, 1, [machine is bigendian]),
  AC_DEFINE(NATIVE_LITTLE_ENDIAN, 1, [machine is littleendian]),
  AC_MSG_ERROR([unknown endianness]),
  AC_MSG_ERROR([universal endianness is not supported - compile separately and use lipo(1)])
)

AC_MSG_CHECKING(whether __STDC_LIMIT_MACROS is required)
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <limits.h>
#include <stdint.h>
]], [[
(void) SIZE_MAX;
(void) UINT64_MAX;
]])],
  [AC_MSG_RESULT(no)],
  [AC_MSG_RESULT(yes)
   CPPFLAGS="$CPPFLAGS -D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS"
])

HAVE_AMD64_ASM_V=0
AS_IF([test "$enable_asm" != "no"],[
  AC_MSG_CHECKING(whether we can use x86_64 asm code)
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  ]], [[
#if defined(__amd64) || defined(__amd64__) || defined(__x86_64__)
# if defined(__CYGWIN__) || defined(__MINGW32__) || defined(__MINGW64__) || defined(_WIN32) || defined(_WIN64)
#  error Windows x86_64 calling conventions are not supported yet
# endif
/* neat */
#else
# error !x86_64
#endif
unsigned char i = 0, o = 0, t;
__asm__ __volatile__ ("pxor %%xmm12, %%xmm6 \n"
                      "movb (%[i]), %[t] \n"
                      "addb %[t], (%[o]) \n"
                      : [t] "=&r"(t)
                      : [o] "D"(&o), [i] "S"(&i)
                      : "memory", "flags", "cc");
]])],
  [AC_MSG_RESULT(yes)
   AC_DEFINE([HAVE_AMD64_ASM], [1], [x86_64 asm code can be used])
   HAVE_AMD64_ASM_V=1],
  [AC_MSG_RESULT(no)])
])
AM_CONDITIONAL([HAVE_AMD64_ASM], [test $HAVE_AMD64_ASM_V = 1])
AC_SUBST(HAVE_AMD64_ASM_V)

HAVE_AVX_ASM_V=0
AS_IF([test "$enable_asm" != "no"],[
  AC_MSG_CHECKING(whether we can assemble AVX opcodes)
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
  ]], [[
#if defined(__amd64) || defined(__amd64__) || defined(__x86_64__)
# if defined(__CYGWIN__) || defined(__MINGW32__) || defined(__MINGW64__) || defined(_WIN32) || defined(_WIN64)
#  error Windows x86_64 calling conventions are not supported yet
# endif
/* neat */
#else
# error !x86_64
#endif
__asm__ __volatile__ ("vpunpcklqdq %xmm0,%xmm13,%xmm0");
]])],
  [AC_MSG_RESULT(yes)
   AC_DEFINE([HAVE_AVX_ASM], [1], [AVX opcodes are supported])
   HAVE_AVX_ASM_V=1],
  [AC_MSG_RESULT(no)])
])
AM_CONDITIONAL([HAVE_AVX_ASM], [test $HAVE_AVX_ASM_V = 1])
AC_SUBST(HAVE_AVX_ASM_V)

AC_MSG_CHECKING(for 128-bit arithmetic)
HAVE_TI_MODE_V=0
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#if !defined(__GNUC__) && !defined(__SIZEOF_INT128__)
# error mode(TI) is a gcc extension, and __int128 is not available
#endif
#if defined(__clang__) && !defined(__x86_64__)
# error clang does not properly handle the 128-bit type on 32-bit systems
#endif
#ifndef NATIVE_LITTLE_ENDIAN
# error libsodium currently expects a little endian CPU for the 128-bit type
#endif
#ifdef __EMSCRIPTEN__
# error emscripten currently supports only shift operations on integers \
#       larger than 64 bits
#endif
#include <stddef.h>
#include <stdint.h>
#if defined(__SIZEOF_INT128__)
typedef unsigned __int128 uint128_t;
#else
typedef unsigned uint128_t __attribute__((mode(TI)));
#endif
void fcontract(uint128_t *t) {
  *t += 0x8000000000000 - 1;
}
]], [[
(void) fcontract;
]])],
[AC_MSG_RESULT(yes)
 AC_DEFINE([HAVE_TI_MODE], [1], [gcc TI mode is available])
 HAVE_TI_MODE_V=1],
[AC_MSG_RESULT(no)])
AM_CONDITIONAL([HAVE_TI_MODE], [test $HAVE_TI_MODE_V = 1])
AC_SUBST(HAVE_TI_MODE_V)

HAVE_CPUID_V=0
AS_IF([test "$enable_asm" != "no" -o "$host_alias" = "x86_64-nacl"],[
  AC_MSG_CHECKING(for cpuid instruction)
  AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ ]], [[
unsigned int cpu_info[4];
__asm__ __volatile__ ("xchgl %%ebx, %k1; cpuid; xchgl %%ebx, %k1" :
                      "=a" (cpu_info[0]), "=&r" (cpu_info[1]),
                      "=c" (cpu_info[2]), "=d" (cpu_info[3]) :
                      "0" (0U), "2" (0U));
  ]])],
  [AC_MSG_RESULT(yes)
   AC_DEFINE([HAVE_CPUID], [1], [cpuid instruction is available])
   HAVE_CPUID_V=1],
  [AC_MSG_RESULT(no)])
  ])
AC_SUBST(HAVE_CPUID_V)

asm_hide_symbol="unsupported"
AS_IF([test "$enable_asm" != "no" -o "$host_os" = "nacl"],[
  AC_MSG_CHECKING(if the .private_extern asm directive is supported)
  AC_LINK_IFELSE([AC_LANG_PROGRAM([[ ]], [[
__asm__ __volatile__ (".private_extern dummy_symbol \n"
                      ".private_extern _dummy_symbol \n"
                      ".globl dummy_symbol \n"
                      ".globl _dummy_symbol \n"
                      "dummy_symbol: \n"
                      "_dummy_symbol: \n"
                      "    nop \n"
);
  ]])],
  [AC_MSG_RESULT(yes)
   asm_hide_symbol=".private_extern"],
  [AC_MSG_RESULT(no)])

  AC_MSG_CHECKING(if the .hidden asm directive is supported)
  AC_LINK_IFELSE([AC_LANG_PROGRAM([[ ]], [[
__asm__ __volatile__ (".hidden dummy_symbol \n"
                      ".hidden _dummy_symbol \n"
                      ".globl dummy_symbol \n"
                      ".globl _dummy_symbol \n"
                      "dummy_symbol: \n"
                      "_dummy_symbol: \n"
                      "    nop \n"
);
  ]])],
  [AC_MSG_RESULT(yes)
   AS_IF([test "$asm_hide_symbol" = "unsupported"],
          [asm_hide_symbol=".hidden"],
          [AC_MSG_NOTICE([unable to reliably tag symbols as private])
           asm_hide_symbol="unsupported"])
  ],
  [AC_MSG_RESULT(no)])

  AS_IF([test "$asm_hide_symbol" != "unsupported"],[
    AC_DEFINE_UNQUOTED([ASM_HIDE_SYMBOL], [$asm_hide_symbol], [directive to hide symbols])
  ])
])

AC_MSG_CHECKING(if weak symbols are supported)
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#if !defined(__ELF__) && !defined(__APPLE_CC__)
# error Support for weak symbols may not be available
#endif
__attribute__((weak)) void __dummy(void *x) { }
void f(void *x) { __dummy(x); }
]], [[ ]]
)],
[AC_MSG_RESULT(yes)
 AC_DEFINE([HAVE_WEAK_SYMBOLS], [1], [weak symbols are supported])],
[AC_MSG_RESULT(no)])

AC_MSG_CHECKING(if data alignment is required)
aligned_access_required=yes
AS_CASE([$host_cpu],
  [i?86|amd64|x86_64|powerpc*|s390*],
    [aligned_access_required=no],
  [arm*],
    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#ifndef __ARM_FEATURE_UNALIGNED
# error data alignment is required
#endif
      ]], [[]])], [aligned_access_required=no], [])]
)
AS_IF([test "x$aligned_access_required" = "xyes"],
  [AC_MSG_RESULT(yes)],
  [AC_MSG_RESULT(no)
   AC_DEFINE([CPU_UNALIGNED_ACCESS], [1], [unaligned memory access is supported])])

dnl Checks for functions and headers

AS_IF([test "x$EMSCRIPTEN" = "x"],[
  AC_CHECK_FUNCS([arc4random arc4random_buf])
  AC_CHECK_FUNCS([mmap mlock madvise mprotect explicit_bzero nanosleep])
])
AC_CHECK_FUNCS([posix_memalign getpid])

AC_SUBST([LIBTOOL_EXTRA_FLAGS])

TEST_LDFLAGS=''
AS_IF([test "x$EMSCRIPTEN" != "x"],[
  EXEEXT=.js
  TEST_LDFLAGS='--memory-init-file 0 --pre-js pre.js.inc -s RESERVED_FUNCTION_POINTERS=8'
])
AC_SUBST(TEST_LDFLAGS)
AM_CONDITIONAL([EMSCRIPTEN], [test "x$EMSCRIPTEN" != "x"])

AM_CONDITIONAL([NATIVECLIENT], [test "x$NATIVECLIENT" != "x"])

AC_DEFINE([CONFIGURED], [1], [the build system was properly configured])

dnl Libtool.

LT_INIT([dlopen])
AC_LIBTOOL_WIN32_DLL
gl_LD_OUTPUT_DEF

dnl Output.

AH_VERBATIM([NDEBUG], [/* Always evaluate assert() calls */
#ifdef NDEBUG
#/**/undef/**/ NDEBUG
#endif])

AC_CONFIG_FILES([Makefile
                 dist-build/Makefile
                 libsodium.pc
                 libsodium-uninstalled.pc
                 msvc-scripts/Makefile
                 src/Makefile
                 src/libsodium/Makefile
                 src/libsodium/include/Makefile
                 src/libsodium/include/sodium/version.h
                 test/default/Makefile
                 test/Makefile
                 ])
AC_OUTPUT