linkage.m4 revision 1.1.1.1.8.2
1 dnl 2 dnl This file contains macros for testing linkage. 3 dnl 4 5 dnl 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 9 dnl 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, [ 15 AC_LANG_SAVE 16 AC_LANG_CPLUSPLUS 17 AC_TRY_COMPILE([#include <math.h> 18 #ifdef HAVE_IEEEFP_H 19 #include <ieeefp.h> 20 #endif 21 ], 22 [ $1(0);], 23 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no]) 24 AC_LANG_RESTORE 25 ]) 26 fi 27 AC_MSG_RESULT($glibcxx_cv_func_$1_use) 28 ]) 29 30 31 dnl 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". 35 dnl 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[ 43 #endif])]) 44 ]) 45 46 47 dnl 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 '_' 52 dnl 53 dnl Define HAVE_CARGF etc if "cargf" is declared and links 54 dnl 55 dnl argument 1 is name of function to check 56 dnl 57 dnl ASSUMES argument is a math function with ONE parameter 58 dnl 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 63 AC_CHECK_FUNCS($1) 64 else 65 GLIBCXX_CHECK_MATH_DECL_1(_$1) 66 if test x$glibcxx_cv_func__$1_use = x"yes"; then 67 AC_CHECK_FUNCS(_$1) 68 fi 69 fi 70 GLIBCXX_MAYBE_UNDERSCORED_FUNCS($1) 71 ]) 72 73 74 dnl 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, [ 83 AC_LANG_SAVE 84 AC_LANG_CPLUSPLUS 85 AC_TRY_COMPILE([#include <math.h>], 86 patsubst(funclist,[\w+],[\& (0);]), 87 [glibcxx_cv_func_$2_use=yes], 88 [glibcxx_cv_func_$2_use=no]) 89 AC_LANG_RESTORE]) 90 AC_MSG_RESULT($glibcxx_cv_func_$2_use) 91 if test x$glibcxx_cv_func_$2_use = x"yes"; then 92 AC_CHECK_FUNCS(funclist) 93 else 94 AC_MSG_CHECKING([for _$1 functions]) 95 AC_CACHE_VAL(glibcxx_cv_func__$2_use, [ 96 AC_LANG_SAVE 97 AC_LANG_CPLUSPLUS 98 AC_TRY_COMPILE([#include <math.h>], 99 patsubst(funclist,[\w+],[_\& (0);]), 100 [glibcxx_cv_func__$2_use=yes], 101 [glibcxx_cv_func__$2_use=no]) 102 AC_LANG_RESTORE]) 103 AC_MSG_RESULT($glibcxx_cv_func__$2_use) 104 if test x$glibcxx_cv_func__$2_use = x"yes"; then 105 AC_CHECK_FUNCS(patsubst(funclist,[\w+],[_\&])) 106 fi 107 fi 108 GLIBCXX_MAYBE_UNDERSCORED_FUNCS(funclist) 109 undefine([funclist]) 110 ]) 111 112 dnl 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 116 dnl 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, [ 122 AC_LANG_SAVE 123 AC_LANG_CPLUSPLUS 124 AC_TRY_COMPILE([#include <math.h>], 125 [ $1(0, 0);], 126 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no]) 127 AC_LANG_RESTORE 128 ]) 129 fi 130 AC_MSG_RESULT($glibcxx_cv_func_$1_use) 131 ]) 132 133 dnl 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 137 dnl 138 dnl Define HAVE_CARGF etc if "cargf" is declared and links 139 dnl 140 dnl argument 1 is name of function to check 141 dnl 142 dnl ASSUMES argument is a math function with TWO parameters 143 dnl 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 148 AC_CHECK_FUNCS($1) 149 else 150 GLIBCXX_CHECK_MATH_DECL_2(_$1) 151 if test x$glibcxx_cv_func__$1_use = x"yes"; then 152 AC_CHECK_FUNCS(_$1) 153 fi 154 fi 155 GLIBCXX_MAYBE_UNDERSCORED_FUNCS($1) 156 ]) 157 158 159 dnl 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 163 dnl 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, [ 169 AC_LANG_SAVE 170 AC_LANG_CPLUSPLUS 171 AC_TRY_COMPILE([#include <math.h>], 172 [ $1(0, 0, 0);], 173 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no]) 174 AC_LANG_RESTORE 175 ]) 176 fi 177 AC_MSG_RESULT($glibcxx_cv_func_$1_use) 178 ]) 179 180 dnl 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 184 dnl 185 dnl Define HAVE_CARGF etc if "cargf" is declared and links 186 dnl 187 dnl argument 1 is name of function to check 188 dnl 189 dnl ASSUMES argument is a math function with THREE parameters 190 dnl 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 195 AC_CHECK_FUNCS($1) 196 else 197 GLIBCXX_CHECK_MATH_DECL_3(_$1) 198 if test x$glibcxx_cv_func__$1_use = x"yes"; then 199 AC_CHECK_FUNCS(_$1) 200 fi 201 fi 202 GLIBCXX_MAYBE_UNDERSCORED_FUNCS($1) 203 ]) 204 205 206 dnl 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 210 dnl 211 dnl argument 1 is name of function to check 212 dnl 213 dnl ASSUMES argument is a stdlib function without parameters 214 dnl 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, [ 220 AC_LANG_SAVE 221 AC_LANG_CPLUSPLUS 222 AC_TRY_COMPILE([#include <stdlib.h>], 223 [ $1();], 224 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no]) 225 AC_LANG_RESTORE 226 ]) 227 fi 228 AC_MSG_RESULT($glibcxx_cv_func_$1_use) 229 if test x$glibcxx_cv_func_$1_use = x"yes"; then 230 AC_CHECK_FUNCS($1) 231 fi 232 ]) 233 234 235 dnl 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 239 dnl 240 dnl argument 1 is name of function to check 241 dnl 242 dnl ASSUMES argument is a stdlib function with TWO parameters 243 dnl 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, [ 249 AC_LANG_SAVE 250 AC_LANG_CPLUSPLUS 251 AC_TRY_COMPILE([#include <stdlib.h>], 252 [ $1(0, 0);], 253 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no]) 254 AC_LANG_RESTORE 255 ]) 256 fi 257 AC_MSG_RESULT($glibcxx_cv_func_$1_use) 258 if test x$glibcxx_cv_func_$1_use = x"yes"; then 259 AC_CHECK_FUNCS($1) 260 fi 261 GLIBCXX_MAYBE_UNDERSCORED_FUNCS($1) 262 ]) 263 264 265 dnl 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 269 dnl 270 dnl argument 1 is name of function to check 271 dnl 272 dnl ASSUMES argument is a stdlib function with THREE parameters 273 dnl 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, [ 279 AC_LANG_SAVE 280 AC_LANG_CPLUSPLUS 281 AC_TRY_COMPILE([#include <stdlib.h>], 282 [ $1(0, 0, 0);], 283 [glibcxx_cv_func_$1_use=yes], [glibcxx_cv_func_$1_use=no]) 284 AC_LANG_RESTORE 285 ]) 286 fi 287 AC_MSG_RESULT($glibcxx_cv_func_$1_use) 288 if test x$glibcxx_cv_func_$1_use = x"yes"; then 289 AC_CHECK_FUNCS($1) 290 fi 291 ]) 292 293 dnl 294 dnl Check to see what the underlying c library is like 295 dnl These checks need to do two things: 296 dnl 1) make sure the name is declared when using the c++ compiler 297 dnl 2) make sure the name has "C" linkage 298 dnl This might seem like overkill but experience has shown that it's not... 299 dnl 300 dnl Define HAVE_STRTOLD if "strtold" is declared and links 301 dnl Define HAVE_STRTOF if "strtof" is declared and links 302 dnl 303 dnl GLIBCXX_CHECK_STDLIB_SUPPORT 304 AC_DEFUN([GLIBCXX_CHECK_STDLIB_SUPPORT], [ 305 ac_test_CXXFLAGS="${CXXFLAGS+set}" 306 ac_save_CXXFLAGS="$CXXFLAGS" 307 CXXFLAGS='-fno-builtin -D_GNU_SOURCE' 308 309 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtold) 310 GLIBCXX_CHECK_STDLIB_DECL_AND_LINKAGE_2(strtof) 311 312 CXXFLAGS="$ac_save_CXXFLAGS" 313 ]) 314 315 dnl 316 dnl Check to see what the underlying c library or math library is like. 317 dnl These checks need to do two things: 318 dnl 1) make sure the name is declared when using the c++ compiler 319 dnl 2) make sure the name has "C" linkage 320 dnl This might seem like overkill but experience has shown that it's not... 321 dnl 322 dnl Define HAVE_CARGF etc if "cargf" is found. 323 dnl 324 dnl GLIBCXX_CHECK_MATH_SUPPORT 325 AC_DEFUN([GLIBCXX_CHECK_MATH_SUPPORT], [ 326 ac_test_CXXFLAGS="${CXXFLAGS+set}" 327 ac_save_CXXFLAGS="$CXXFLAGS" 328 CXXFLAGS='-fno-builtin -D_GNU_SOURCE' 329 330 dnl Check libm 331 AC_CHECK_LIB(m, sin, libm="-lm") 332 ac_save_LIBS="$LIBS" 333 LIBS="$LIBS $libm" 334 335 dnl Check to see if certain C math functions exist. 336 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isinf) 337 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isnan) 338 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(finite) 339 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3(sincos) 340 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(fpclass) 341 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(qfpclass) 342 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(hypot) 343 344 dnl Check to see if basic C math functions have float versions. 345 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(float trig, 346 float_trig, 347 acosf asinf atanf \ 348 cosf sinf tanf \ 349 coshf sinhf tanhf) 350 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(float round, 351 float_round, 352 ceilf floorf) 353 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(expf) 354 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isnanf) 355 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isinff) 356 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(atan2f) 357 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(fabsf) 358 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(fmodf) 359 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(frexpf) 360 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(hypotf) 361 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpf) 362 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(logf) 363 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(log10f) 364 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(modff) 365 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(modf) 366 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(powf) 367 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtf) 368 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3(sincosf) 369 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(finitef) 370 371 dnl Check to see if basic C math functions have long double versions. 372 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(long double trig, 373 long_double_trig, 374 acosl asinl atanl \ 375 cosl sinl tanl \ 376 coshl sinhl tanhl) 377 GLIBCXX_CHECK_MATH_DECLS_AND_LINKAGES_1(long double round, 378 long_double_round, 379 ceill floorl) 380 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isnanl) 381 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(isinfl) 382 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(atan2l) 383 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(expl) 384 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(fabsl) 385 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(fmodl) 386 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(frexpl) 387 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(hypotl) 388 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(ldexpl) 389 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(logl) 390 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(log10l) 391 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(modfl) 392 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_2(powl) 393 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(sqrtl) 394 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_3(sincosl) 395 GLIBCXX_CHECK_MATH_DECL_AND_LINKAGE_1(finitel) 396 397 LIBS="$ac_save_LIBS" 398 CXXFLAGS="$ac_save_CXXFLAGS" 399 ]) 400
Indexes created Fri Jun 26 00:24:39 UTC 2026