])
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)
- define([NAME], [translit([$1],[abcdefghijklmnopqrstuvwxyz],
- [ABCDEFGHIJKLMNOPQRSTUVWXYZ])])
- if test x$glibcxx_cv_func_$1_link = x"yes"; then
- AC_DEFINE([HAVE_]NAME, 1, [Define if the compiler/host combination has $1.])
- fi
- undefine([NAME])
- 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
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
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)
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)
LIBS="$ac_save_LIBS"
CXXFLAGS="$ac_save_CXXFLAGS"
])
-
-
-dnl
-dnl Check to see if there is native support for complex
-dnl
-dnl Don't compile bits in math/* if native support exits.
-dnl
-dnl Define USE_COMPLEX_LONG_DOUBLE etc if "copysignl" is found.
-dnl
-dnl GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT
-AC_DEFUN([GLIBCXX_CHECK_COMPLEX_MATH_SUPPORT], [
- dnl Check for complex versions of math functions of platform. This will
- dnl always pass if libm is available, and fail if it isn't. If it is
- dnl available, we assume we'll need it later, so add it to LIBS.
- AC_CHECK_LIB(m, main)
- AC_REPLACE_MATHFUNCS(copysignf)
-
- dnl For __signbit to signbit conversions.
- dnl Not sure why this is done, as these will be macros mostly.
- dnl Should probably coordinate this with std_cmath.h.
- AC_CHECK_FUNCS([__signbit], , [LIBMATHOBJS="$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="$LIBMATHOBJS signbitl.lo"])
- fi
-
- # Used in libmath/Makefile.am.
- if test -n "$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"])])
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