2 dnl This file contains macros for testing linkage.
6 dnl Check to see if the (math function) argument passed is
7 dnl declared when using the c++ compiler
8 dnl ASSUMES argument is a math function with ONE parameter
10 dnl GLIBCXX_CHECK_MATH_DECL_1
11 AC_DEFUN([GLIBCXX_CHECK_MATH_DECL_1], [
12 AC_MSG_CHECKING([for $1 declaration])
13 if test x${glibcxx_cv_func_$1_use+set} != xset; then
14 AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
17 AC_TRY_COMPILE([#include <math.h>
23 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
27 AC_MSG_RESULT($glibcxx_cv_func_$1_use)
32 dnl Define autoheader template for using the underscore functions
33 dnl For each parameter, create a macro where if func doesn't exist,
34 dnl but _func does, then it will "#define func _func".
36 dnl GLIBCXX_MAYBE_UNDERSCORED_FUNCS
37 AC_DEFUN([GLIBCXX_MAYBE_UNDERSCORED_FUNCS],
38 [AC_FOREACH([glibcxx_ufunc], [$1],
39 [AH_VERBATIM(_[]glibcxx_ufunc,
40 [#if defined (]AS_TR_CPP(HAVE__[]glibcxx_ufunc)[) && ! defined (]AS_TR_CPP(HAVE_[]glibcxx_ufunc)[)
41 # define ]AS_TR_CPP(HAVE_[]glibcxx_ufunc)[ 1
42 # define ]glibcxx_ufunc[ _]glibcxx_ufunc[
48 dnl Check to see if the (math function) argument passed is
49 dnl 1) declared when using the c++ compiler
50 dnl 2) has "C" linkage
51 dnl 3) if not, see if 1) and 2) for argument prepended with '_'
53 dnl Define HAVE_CARGF etc if "cargf" is declared and links
55 dnl argument 1 is name of function to check
57 dnl ASSUMES argument is a math function with ONE parameter
59 dnl GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1
60 AC_DEFUN([GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1], [
61 GLIBCXX_CHECK_MATH_DECL_1($1)
62 if test x$glibcxx_cv_func_$1_use = x"yes"; then
65 GLIBCXX_CHECK_MATH_DECL_1(_$1)
66 if test x$glibcxx_cv_func__$1_use = x"yes"; then
70 GLIBCXX_MAYBE_UNDERSCORED_FUNCS($1)
75 dnl Like GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1, but does a bunch of
76 dnl of functions at once. It's an all-or-nothing check -- either
77 dnl HAVE_XYZ is defined for each of the functions, or for none of them.
78 dnl Doing it this way saves significant configure time.
79 AC_DEFUN([GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1], [
80 define([funclist],patsubst($3,\(\w+\)\(\W*\),\1 ))dnl
81 AC_MSG_CHECKING([for $1 functions])
82 AC_CACHE_VAL(glibcxx_cv_func_$2_use, [
85 AC_TRY_COMPILE([#include <math.h>],
86 patsubst(funclist,[\w+],[\& (0);]),
87 [glibcxx_cv_func_$2_use=yes],
88 [glibcxx_cv_func_$2_use=no])
90 AC_MSG_RESULT($glibcxx_cv_func_$2_use)
91 if test x$glibcxx_cv_func_$2_use = x"yes"; then
92 AC_CHECK_FUNCS(funclist)
94 AC_MSG_CHECKING([for _$1 functions])
95 AC_CACHE_VAL(glibcxx_cv_func__$2_use, [
98 AC_TRY_COMPILE([#include <math.h>],
99 patsubst(funclist,[\w+],[_\& (0);]),
100 [glibcxx_cv_func__$2_use=yes],
101 [glibcxx_cv_func__$2_use=no])
103 AC_MSG_RESULT($glibcxx_cv_func__$2_use)
104 if test x$glibcxx_cv_func__$2_use = x"yes"; then
105 AC_CHECK_FUNCS(patsubst(funclist,[\w+],[_\&]))
108 GLIBCXX_MAYBE_UNDERSCORED_FUNCS(funclist)
113 dnl Check to see if the (math function) argument passed is
114 dnl declared when using the c++ compiler
115 dnl ASSUMES argument is a math function with TWO parameters
117 dnl GLIBCXX_CHECK_MATH_DECL_2
118 AC_DEFUN([GLIBCXX_CHECK_MATH_DECL_2], [
119 AC_MSG_CHECKING([for $1 declaration])
120 if test x${glibcxx_cv_func_$1_use+set} != xset; then
121 AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
124 AC_TRY_COMPILE([#include <math.h>],
126 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
130 AC_MSG_RESULT($glibcxx_cv_func_$1_use)
134 dnl Check to see if the (math function) argument passed is
135 dnl 1) declared when using the c++ compiler
136 dnl 2) has "C" linkage
138 dnl Define HAVE_CARGF etc if "cargf" is declared and links
140 dnl argument 1 is name of function to check
142 dnl ASSUMES argument is a math function with TWO parameters
144 dnl GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2
145 AC_DEFUN([GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2], [
146 GLIBCXX_CHECK_MATH_DECL_2($1)
147 if test x$glibcxx_cv_func_$1_use = x"yes"; then
150 GLIBCXX_CHECK_MATH_DECL_2(_$1)
151 if test x$glibcxx_cv_func__$1_use = x"yes"; then
155 GLIBCXX_MAYBE_UNDERSCORED_FUNCS($1)
160 dnl Check to see if the (math function) argument passed is
161 dnl declared when using the c++ compiler
162 dnl ASSUMES argument is a math function with THREE parameters
164 dnl GLIBCXX_CHECK_MATH_DECL_3
165 AC_DEFUN([GLIBCXX_CHECK_MATH_DECL_3], [
166 AC_MSG_CHECKING([for $1 declaration])
167 if test x${glibcxx_cv_func_$1_use+set} != xset; then
168 AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
171 AC_TRY_COMPILE([#include <math.h>],
173 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
177 AC_MSG_RESULT($glibcxx_cv_func_$1_use)
181 dnl Check to see if the (math function) argument passed is
182 dnl 1) declared when using the c++ compiler
183 dnl 2) has "C" linkage
185 dnl Define HAVE_CARGF etc if "cargf" is declared and links
187 dnl argument 1 is name of function to check
189 dnl ASSUMES argument is a math function with THREE parameters
191 dnl GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3
192 AC_DEFUN([GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3], [
193 GLIBCXX_CHECK_MATH_DECL_3($1)
194 if test x$glibcxx_cv_func_$1_use = x"yes"; then
197 GLIBCXX_CHECK_MATH_DECL_3(_$1)
198 if test x$glibcxx_cv_func__$1_use = x"yes"; then
202 GLIBCXX_MAYBE_UNDERSCORED_FUNCS($1)
207 dnl Check to see if the (stdlib function) argument passed is
208 dnl 1) declared when using the c++ compiler
209 dnl 2) has "C" linkage
211 dnl argument 1 is name of function to check
213 dnl ASSUMES argument is a stdlib function without parameters
215 dnl GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_0
216 AC_DEFUN([GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_0], [
217 AC_MSG_CHECKING([for $1 declaration])
218 if test x${glibcxx_cv_func_$1_use+set} != xset; then
219 AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
222 AC_TRY_COMPILE([#include <stdlib.h>],
224 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
228 AC_MSG_RESULT($glibcxx_cv_func_$1_use)
229 if test x$glibcxx_cv_func_$1_use = x"yes"; then
236 dnl Check to see if the (stdlib function) argument passed is
237 dnl 1) declared when using the c++ compiler
238 dnl 2) has "C" linkage
240 dnl argument 1 is name of function to check
242 dnl ASSUMES argument is a stdlib function with TWO parameters
244 dnl GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2
245 AC_DEFUN([GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2], [
246 AC_MSG_CHECKING([for $1 declaration])
247 if test x${glibcxx_cv_func_$1_use+set} != xset; then
248 AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
251 AC_TRY_COMPILE([#include <stdlib.h>],
253 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
257 AC_MSG_RESULT($glibcxx_cv_func_$1_use)
258 if test x$glibcxx_cv_func_$1_use = x"yes"; then
261 GLIBCXX_MAYBE_UNDERSCORED_FUNCS($1)
266 dnl Check to see if the (stdlib function) argument passed is
267 dnl 1) declared when using the c++ compiler
268 dnl 2) has "C" linkage
270 dnl argument 1 is name of function to check
272 dnl ASSUMES argument is a stdlib function with THREE parameters
274 dnl GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3
275 AC_DEFUN([GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_3], [
276 AC_MSG_CHECKING([for $1 declaration])
277 if test x${glibcxx_cv_func_$1_use+set} != xset; then
278 AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
281 AC_TRY_COMPILE([#include <stdlib.h>],
283 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
287 AC_MSG_RESULT($glibcxx_cv_func_$1_use)
288 if test x$glibcxx_cv_func_$1_use = x"yes"; then
294 dnl Because the builtins are picky picky picky about the arguments they take,
295 dnl do an explict linkage tests here.
296 dnl Check to see if the (math function) argument passed is
297 dnl 1) declared when using the c++ compiler
298 dnl 2) has "C" linkage
300 dnl Define HAVE_CARGF etc if "cargf" is declared and links
302 dnl argument 1 is name of function to check
304 dnl ASSUMES argument is a math function with ONE parameter
306 dnl GLIBCXX_CHECK_BUILTIN_MATH_DECL_LINKAGE_1
307 AC_DEFUN([GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1], [
308 AC_MSG_CHECKING([for $1 declaration])
309 if test x${glibcxx_cv_func_$1_use+set} != xset; then
310 AC_CACHE_VAL(glibcxx_cv_func_$1_use, [
313 AC_TRY_COMPILE([#include <math.h>],
315 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no])
319 AC_MSG_RESULT($glibcxx_cv_func_$1_use)
320 if test x$glibcxx_cv_func_$1_use = x"yes"; then
321 AC_MSG_CHECKING([for $1 linkage])
322 if test x${glibcxx_cv_func_$1_link+set} != xset; then
323 AC_CACHE_VAL(glibcxx_cv_func_$1_link, [
324 AC_TRY_LINK([#include <math.h>],
326 [glibcxx_cv_func_$1_link=yes], [glibcxx_cv_func_$1_link=no])
329 AC_MSG_RESULT($glibcxx_cv_func_$1_link)
330 define([NAME], [translit([$1],[abcdefghijklmnopqrstuvwxyz],
331 [ABCDEFGHIJKLMNOPQRSTUVWXYZ])])
332 if test x$glibcxx_cv_func_$1_link = x"yes"; then
333 AC_DEFINE([HAVE_]NAME, 1, [Define if the compiler/host combination has $1.])
341 dnl Check to see what builtin math functions are supported
343 dnl check for __builtin_abs
344 dnl check for __builtin_fabsf
345 dnl check for __builtin_fabs
346 dnl check for __builtin_fabl
347 dnl check for __builtin_labs
348 dnl check for __builtin_sqrtf
349 dnl check for __builtin_sqrtl
350 dnl check for __builtin_sqrt
351 dnl check for __builtin_sinf
352 dnl check for __builtin_sin
353 dnl check for __builtin_sinl
354 dnl check for __builtin_cosf
355 dnl check for __builtin_cos
356 dnl check for __builtin_cosl
358 dnl GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT
359 AC_DEFUN([GLIBCXX_CHECK_BUILTIN_MATH_SUPPORT], [
360 dnl Test for builtin math functions.
361 dnl These are made in gcc/c-common.c
362 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_abs)
363 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsf)
364 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabs)
365 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_fabsl)
366 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_labs)
368 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtf)
369 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrt)
370 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sqrtl)
372 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinf)
373 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sin)
374 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_sinl)
376 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosf)
377 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cos)
378 GLIBCXX_CHECK_BUILTIN_MATH_DECL_AND_LINKAGE_1(__builtin_cosl)
382 dnl Check to see what the underlying c library is like
383 dnl These checks need to do two things:
384 dnl 1) make sure the name is declared when using the c++ compiler
385 dnl 2) make sure the name has "C" linkage
386 dnl This might seem like overkill but experience has shown that it's not...
388 dnl Define HAVE_STRTOLD if "strtold" is declared and links
389 dnl Define HAVE_STRTOF if "strtof" is declared and links
391 dnl GLIBCXX_CHECK_STDLIB_SUPPORT
392 AC_DEFUN([GLIBCXX_CHECK_STDLIB_SUPPORT], [
393 ac_test_CXXFLAGS="${CXXFLAGS+set}"
394 ac_save_CXXFLAGS="$CXXFLAGS"
395 CXXFLAGS='-fno-builtin -D_GNU_SOURCE'
397 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold)
398 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtof)
400 CXXFLAGS="$ac_save_CXXFLAGS"
404 dnl Check to see what the underlying c library or math library is like.
405 dnl These checks need to do two things:
406 dnl 1) make sure the name is declared when using the c++ compiler
407 dnl 2) make sure the name has "C" linkage
408 dnl This might seem like overkill but experience has shown that it's not...
410 dnl Define HAVE_CARGF etc if "cargf" is found.
412 dnl GLIBCXX_CHECK_MATH_SUPPORT
413 AC_DEFUN([GLIBCXX_CHECK_MATH_SUPPORT], [
414 ac_test_CXXFLAGS="${CXXFLAGS+set}"
415 ac_save_CXXFLAGS="$CXXFLAGS"
416 CXXFLAGS='-fno-builtin -D_GNU_SOURCE'
419 AC_CHECK_LIB(m, sin, libm="-lm")
423 dnl Check to see if certain C math functions exist.
424 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isinf)
425 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isnan)
426 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(finite)
427 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(copysign)
428 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3(sincos)
429 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass)
430 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass)
431 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(hypot)
433 dnl Check to see if basic C math functions have float versions.
434 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig,
439 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(float round,
442 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(expf)
443 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf)
444 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isinff)
445 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(atan2f)
446 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf)
447 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf)
448 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf)
449 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(hypotf)
450 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf)
451 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(logf)
452 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(log10f)
453 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(modff)
454 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(modf)
455 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(powf)
456 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf)
457 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf)
458 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(finitef)
460 dnl Check to see if basic C math functions have long double versions.
461 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig,
466 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round,
469 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl)
470 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl)
471 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(copysignl)
472 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l)
473 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(expl)
474 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl)
475 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl)
476 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl)
477 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(hypotl)
478 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl)
479 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(logl)
480 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(log10l)
481 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(modfl)
482 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(powl)
483 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl)
484 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl)
485 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(finitel)
488 CXXFLAGS="$ac_save_CXXFLAGS"
493 dnl Check to see if there is native support for complex
495 dnl Don't compile bits in math/* if native support exits.
497 dnl Define USE_COMPLEX_LONG_DOUBLE etc if "copysignl" is found.
499 dnl GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT
500 AC_DEFUN([GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT], [
501 dnl Check for complex versions of math functions of platform. This will
502 dnl always pass if libm is available, and fail if it isn't. If it is
503 dnl available, we assume we'll need it later, so add it to LIBS.
504 AC_CHECK_LIB(m, main)
505 AC_REPLACE_MATHFUNCS(copysignf)
507 dnl For __signbit to signbit conversions.
508 dnl Not sure why this is done, as these will be macros mostly.
509 dnl Should probably coordinate this with std_cmath.h.
510 AC_CHECK_FUNCS([__signbit], , [LIBMATHOBJS="$LIBMATHOBJS signbit.lo"])
512 AC_CHECK_FUNCS([__signbitf], , [LIBMATHOBJS="$LIBMATHOBJS signbitf.lo"])
514 dnl Compile the long double complex functions only if the function
515 dnl provides the non-complex long double functions that are needed.
516 dnl Currently this includes copysignl, which should be
517 dnl cached from the GLIBCXX_CHECK_MATH_SUPPORT macro, above.
518 if test x$ac_cv_func_copysignl = x"yes"; then
519 AC_CHECK_FUNCS([__signbitl], , [LIBMATHOBJS="$LIBMATHOBJS signbitl.lo"])
522 # Used in libmath/Makefile.am.
523 if test -n "$LIBMATHOBJS"; then
526 AC_SUBST(LIBMATHOBJS)
530 # Check for functions in math library.
531 # Ulrich Drepper <drepper@cygnus.com>, 1998.
533 # This file can be copied and used freely without restrictions. It can
534 # be used in projects which are not available under the GNU Public License
535 # but which still want to provide support for the GNU gettext functionality.
536 # Please note that the actual code is *not* freely available.
537 dnl AC_REPLACE_MATHFUNCS(FUNCTION...)
538 AC_DEFUN([AC_REPLACE_MATHFUNCS],
539 [AC_CHECK_FUNCS([$1], , [LIBMATHOBJS="$LIBMATHOBJS ${ac_func}.lo"])])