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
|
dnl
dnl This file contains stuff.
dnl
dnl
dnl Check to see if the (math function) argument passed is
dnl declared when using the c++ compiler
dnl ASSUMES argument is a math function with ONE parameter
dnl
dnl GLIBCXX_CHECK_MATH_DECL_1
AC_DEFUN(GLIBCXX_CHECK_MATH_DECL_1, [
AC_MSG_CHECKING([for $1 declaration])
if test x${glibcxx_cv_func_$1_use+set} != xset; then
AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <math.h>
#ifdef HAVE_IEEEFP_H
#include <ieeefp.h>
#endif
],
[ $1(0);],
[glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
AC_LANG_RESTORE
])
fi
AC_MSG_RESULT($glibcxx_cv_func_$1_use)
])
dnl
dnl Check to see if the (math function) argument passed is
dnl 1) declared when using the c++ compiler
dnl 2) has "C" linkage
dnl 3) if not, see if 1) and 2) for argument prepended with '_'
dnl
dnl Define HAVE_CARGF etc if "cargf" is declared and links
dnl
dnl argument 1 is name of function to check
dnl
dnl ASSUMES argument is a math function with ONE parameter
dnl
dnl GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1
AC_DEFUN(GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1, [
GLIBCXX_CHECK_MATH_DECL_1($1)
if test x$glibcxx_cv_func_$1_use = x"yes"; then
AC_CHECK_FUNCS($1)
else
GLIBCXX_CHECK_MATH_DECL_1(_$1)
if test x$glibcxx_cv_func__$1_use = x"yes"; then
AC_CHECK_FUNCS(_$1)
fi
fi
])
dnl
dnl Like GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1, but does a bunch of
dnl of functions at once. It's an all-or-nothing check -- either
dnl HAVE_XYZ is defined for each of the functions, or for none of them.
dnl Doing it this way saves significant configure time.
AC_DEFUN(GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1, [
AC_MSG_CHECKING([for $1 functions])
AC_CACHE_VAL(glibcxx_cv_func_$2_use, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <math.h>],
[ `for x in $3; do echo "$x (0);"; done` ],
[glibcxx_cv_func_$2_use=yes],
[glibcxx_cv_func_$2_use=no])
AC_LANG_RESTORE])
AC_MSG_RESULT($glibcxx_cv_func_$2_use)
if test x$glibcxx_cv_func_$2_use = x"yes"; then
AC_CHECK_FUNCS($3)
fi
])
dnl
dnl Check to see if the (math function) argument passed is
dnl declared when using the c++ compiler
dnl ASSUMES argument is a math function with TWO parameters
dnl
dnl GLIBCXX_CHECK_MATH_DECL_2
AC_DEFUN(GLIBCXX_CHECK_MATH_DECL_2, [
AC_MSG_CHECKING([for $1 declaration])
if test x${glibcxx_cv_func_$1_use+set} != xset; then
AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <math.h>],
[ $1(0, 0);],
[glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
AC_LANG_RESTORE
])
fi
AC_MSG_RESULT($glibcxx_cv_func_$1_use)
])
dnl
dnl Check to see if the (math function) argument passed is
dnl 1) declared when using the c++ compiler
dnl 2) has "C" linkage
dnl
dnl Define HAVE_CARGF etc if "cargf" is declared and links
dnl
dnl argument 1 is name of function to check
dnl
dnl ASSUMES argument is a math function with TWO parameters
dnl
dnl GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2
AC_DEFUN(GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2, [
GLIBCXX_CHECK_MATH_DECL_2($1)
if test x$glibcxx_cv_func_$1_use = x"yes"; then
AC_CHECK_FUNCS($1)
else
GLIBCXX_CHECK_MATH_DECL_2(_$1)
if test x$glibcxx_cv_func__$1_use = x"yes"; then
AC_CHECK_FUNCS(_$1)
fi
fi
])
dnl
dnl Check to see if the (math function) argument passed is
dnl declared when using the c++ compiler
dnl ASSUMES argument is a math function with THREE parameters
dnl
dnl GLIBCXX_CHECK_MATH_DECL_3
AC_DEFUN(GLIBCXX_CHECK_MATH_DECL_3, [
AC_MSG_CHECKING([for $1 declaration])
if test x${glibcxx_cv_func_$1_use+set} != xset; then
AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <math.h>],
[ $1(0, 0, 0);],
[glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
AC_LANG_RESTORE
])
fi
AC_MSG_RESULT($glibcxx_cv_func_$1_use)
])
dnl
dnl Check to see if the (math function) argument passed is
dnl 1) declared when using the c++ compiler
dnl 2) has "C" linkage
dnl
dnl Define HAVE_CARGF etc if "cargf" is declared and links
dnl
dnl argument 1 is name of function to check
dnl
dnl ASSUMES argument is a math function with THREE parameters
dnl
dnl GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3
AC_DEFUN(GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3, [
GLIBCXX_CHECK_MATH_DECL_3($1)
if test x$glibcxx_cv_func_$1_use = x"yes"; then
AC_CHECK_FUNCS($1)
else
GLIBCXX_CHECK_MATH_DECL_3(_$1)
if test x$glibcxx_cv_func__$1_use = x"yes"; then
AC_CHECK_FUNCS(_$1)
fi
fi
])
dnl
dnl Check to see if the (stdlib function) argument passed is
dnl 1) declared when using the c++ compiler
dnl 2) has "C" linkage
dnl
dnl argument 1 is name of function to check
dnl
dnl ASSUMES argument is a stdlib function without parameters
dnl
dnl GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_0
AC_DEFUN(GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_0, [
AC_MSG_CHECKING([for $1 declaration])
if test x${glibcxx_cv_func_$1_use+set} != xset; then
AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <stdlib.h>],
[ $1();],
[glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
AC_LANG_RESTORE
])
fi
AC_MSG_RESULT($glibcxx_cv_func_$1_use)
if test x$glibcxx_cv_func_$1_use = x"yes"; then
AC_CHECK_FUNCS($1)
fi
])
dnl
dnl Check to see if the (stdlib function) argument passed is
dnl 1) declared when using the c++ compiler
dnl 2) has "C" linkage
dnl
dnl argument 1 is name of function to check
dnl
dnl ASSUMES argument is a math function with TWO parameters
dnl
dnl GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2
AC_DEFUN(GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2, [
AC_MSG_CHECKING([for $1 declaration])
if test x${glibcxx_cv_func_$1_use+set} != xset; then
AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <stdlib.h>],
[ $1(0, 0);],
[glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
AC_LANG_RESTORE
])
fi
AC_MSG_RESULT($glibcxx_cv_func_$1_use)
if test x$glibcxx_cv_func_$1_use = x"yes"; then
AC_CHECK_FUNCS($1)
fi
])
dnl
dnl Check to see if the (stdlib function) argument passed is
dnl 1) declared when using the c++ compiler
dnl 2) has "C" linkage
dnl
dnl argument 1 is name of function to check
dnl
dnl ASSUMES argument is a function with THREE parameters
dnl
dnl GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3
AC_DEFUN(GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3, [
AC_MSG_CHECKING([for $1 declaration])
if test x${glibcxx_cv_func_$1_use+set} != xset; then
AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <stdlib.h>],
[ $1(0, 0, 0);],
[glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
AC_LANG_RESTORE
])
fi
AC_MSG_RESULT($glibcxx_cv_func_$1_use)
if test x$glibcxx_cv_func_$1_use = x"yes"; then
AC_CHECK_FUNCS($1)
fi
])
dnl
dnl Because the builtins are picky picky picky about the arguments they take,
dnl do an explict linkage tests here.
dnl Check to see if the (math function) argument passed is
dnl 1) declared when using the c++ compiler
dnl 2) has "C" linkage
dnl
dnl Define HAVE_CARGF etc if "cargf" is declared and links
dnl
dnl argument 1 is name of function to check
dnl
dnl ASSUMES argument is a math function with ONE parameter
dnl
dnl GLIBCXX_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
AC_DEFUN(GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1, [
AC_MSG_CHECKING([for $1 declaration])
if test x${glibcxx_cv_func_$1_use+set} != xset; then
AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_TRY_COMPILE([#include <math.h>],
[ $1(0);],
[glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
AC_LANG_RESTORE
])
fi
AC_MSG_RESULT($glibcxx_cv_func_$1_use)
if test x$glibcxx_cv_func_$1_use = x"yes"; then
AC_MSG_CHECKING([for $1 linkage])
if test x${glibcxx_cv_func_$1_link+set} != xset; then
AC_CACHE_VAL(glibcxx_cv_func_$1_link, [
AC_TRY_LINK([#include <math.h>],
[ $1(0);],
[glibcxx_cv_func_$1_link=yes], [glibcxx_cv_func_$1_link=no])
])
fi
AC_MSG_RESULT($glibcxx_cv_func_$1_link)
if test x$glibcxx_cv_func_$1_link = x"yes"; then
ac_tr_func=HAVE_`echo $1 | tr 'abcdefghijklmnopqrstuvwxyz' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'`
AC_DEFINE_UNQUOTED(${ac_tr_func})
fi
fi
])
dnl
dnl Check to see what builtin math functions are supported
dnl
dnl check for __builtin_abs
dnl check for __builtin_fabsf
dnl check for __builtin_fabs
dnl check for __builtin_fabl
dnl check for __builtin_labs
dnl check for __builtin_sqrtf
dnl check for __builtin_sqrtl
dnl check for __builtin_sqrt
dnl check for __builtin_sinf
dnl check for __builtin_sin
dnl check for __builtin_sinl
dnl check for __builtin_cosf
dnl check for __builtin_cos
dnl check for __builtin_cosl
dnl
dnl GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
AC_DEFUN(GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT, [
dnl Test for builtin math functions.
dnl These are made in gcc/c-common.c
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrt)
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl)
dnl There is, without a doubt, a more elegant way to have these
dnl names exported so that they won't be stripped out of acconfig.h by
dnl autoheader. I leave this as an exercise to somebody less frustrated
dnl than I.... please email the libstdc++ list if you can figure out a
dnl more elegant approach (see autoconf/acgen.m4 and specifically
dnl AC_CHECK_FUNC for things to steal.)
dummyvar=no
if test x$dummyvar = x"yes"; then
AC_DEFINE(HAVE___BUILTIN_ABS)
AC_DEFINE(HAVE___BUILTIN_LABS)
AC_DEFINE(HAVE___BUILTIN_COS)
AC_DEFINE(HAVE___BUILTIN_COSF)
AC_DEFINE(HAVE___BUILTIN_COSL)
AC_DEFINE(HAVE___BUILTIN_FABS)
AC_DEFINE(HAVE___BUILTIN_FABSF)
AC_DEFINE(HAVE___BUILTIN_FABSL)
AC_DEFINE(HAVE___BUILTIN_SIN)
AC_DEFINE(HAVE___BUILTIN_SINF)
AC_DEFINE(HAVE___BUILTIN_SINL)
AC_DEFINE(HAVE___BUILTIN_SQRT)
AC_DEFINE(HAVE___BUILTIN_SQRTF)
AC_DEFINE(HAVE___BUILTIN_SQRTL)
fi
])
dnl
dnl Check to see what the underlying c library is like
dnl These checks need to do two things:
dnl 1) make sure the name is declared when using the c++ compiler
dnl 2) make sure the name has "C" linkage
dnl This might seem like overkill but experience has shown that it's not...
dnl
dnl Define HAVE_STRTOLD if "strtold" is declared and links
dnl Define HAVE_STRTOF if "strtof" is declared and links
dnl Define HAVE_LRAND48 if "lrand48" is declared and links
dnl
dnl GLIBCXX_CHECK_STDLIB_SUPPORT
AC_DEFUN(GLIBCXX_CHECK_STDLIB_SUPPORT, [
ac_test_CXXFLAGS="${CXXFLAGS+set}"
ac_save_CXXFLAGS="$CXXFLAGS"
CXXFLAGS='-fno-builtin -D_GNU_SOURCE'
GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtof)
GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_0(lrand48)
CXXFLAGS="$ac_save_CXXFLAGS"
])
dnl
dnl Check to see what the underlying c library or math library is like.
dnl These checks need to do two things:
dnl 1) make sure the name is declared when using the c++ compiler
dnl 2) make sure the name has "C" linkage
dnl This might seem like overkill but experience has shown that it's not...
dnl
dnl Define HAVE_CARGF etc if "cargf" is found.
dnl
dnl GLIBCXX_CHECK_MATH_SUPPORT
AC_DEFUN(GLIBCXX_CHECK_MATH_SUPPORT, [
ac_test_CXXFLAGS="${CXXFLAGS+set}"
ac_save_CXXFLAGS="$CXXFLAGS"
CXXFLAGS='-fno-builtin -D_GNU_SOURCE'
dnl Check libm
AC_CHECK_LIB(m, sin, libm="-lm")
ac_save_LIBS="$LIBS"
LIBS="$LIBS $libm"
dnl Check to see if certain C math functions exist.
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(hypot)
dnl Check to see if basic C math functions have float versions.
GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig,
float_trig,
acosf asinf atanf \
cosf sinf tanf \
coshf sinhf tanhf)
GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(float round,
float_round,
ceilf floorf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(expf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(atan2f)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(hypotf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
dnl Check to see if basic C math functions have long double versions.
GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig,
long_double_trig,
acosl asinl atanl \
cosl sinl tanl \
coshl sinhl tanhl)
GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round,
long_double_round,
ceill floorl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(hypotl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
dnl Some runtimes have these functions with a preceding underscore. Please
dnl keep this sync'd with the one above. And if you add any new symbol,
dnl please add the corresponding block in the @BOTTOM@ section of acconfig.h.
dnl Check to see if certain C math functions exist.
dnl Check to see if basic C math functions have float versions.
GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(_float trig,
_float_trig,
_acosf _asinf _atanf \
_cosf _sinf _tanf \
_coshf _sinhf _tanhf)
GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(_float round,
_float_round,
_ceilf _floorf)
dnl Check to see if basic C math functions have long double versions.
GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double trig,
_long_double_trig,
_acosl _asinl _atanl \
_cosl _sinl _tanl \
_coshl _sinhl _tanhl)
GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(_long double round,
_long_double_round,
_ceill _floorl)
LIBS="$ac_save_LIBS"
CXXFLAGS="$ac_save_CXXFLAGS"
])
dnl
dnl Check to see if there is native support for complex
dnl
dnl Don't compile bits in math/* if native support exits.
dnl
dnl Define USE_COMPLEX_LONG_DOUBLE etc if "copysignl" is found.
dnl
dnl GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT
AC_DEFUN(GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT, [
dnl Check for complex versions of math functions of platform. This will
dnl always pass if libm is available, and fail if it isn't. If it is
dnl available, we assume we'll need it later, so add it to LIBS.
AC_CHECK_LIB(m, main)
AC_REPLACE_MATHFUNCS(nan copysignf)
dnl For __signbit to signbit conversions.
AC_CHECK_FUNCS([__signbit], , [LIBMATHOBJS="$LIBMATHOBJS signbit.lo"])
AC_CHECK_FUNCS([__signbitf], , [LIBMATHOBJS="$LIBMATHOBJS signbitf.lo"])
dnl Compile the long double complex functions only if the function
dnl provides the non-complex long double functions that are needed.
dnl Currently this includes copysignl, which should be
dnl cached from the GLIBCXX_CHECK_MATH_SUPPORT macro, above.
if test x$ac_cv_func_copysignl = x"yes"; then
AC_CHECK_FUNCS([__signbitl], , [LIBMATHOBJS="$LIBMATHOBJS signbitl.lo"])
fi
# XXX Review this. Nothing uses it.
if test -n "$LIBMATHOBJS"; then
need_libmath=yes
fi
AC_SUBST(LIBMATHOBJS)
])
# Check for functions in math library.
# Ulrich Drepper <drepper@cygnus.com>, 1998.
#
# This file can be copied and used freely without restrictions. It can
# be used in projects which are not available under the GNU Public License
# but which still want to provide support for the GNU gettext functionality.
# Please note that the actual code is *not* freely available.
#
# serial 1
#
dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
AC_DEFUN(AC_REPLACE_MATHFUNCS,
[AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])])
dnl vim:et:ts=2
|
