# math_h.m4 serial 37
dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.

AC_DEFUN([gl_MATH_H],
[
  AC_REQUIRE([gl_MATH_H_DEFAULTS])
  gl_CHECK_NEXT_HEADERS([math.h])
  AC_REQUIRE([AC_C_INLINE])

  AC_CACHE_CHECK([whether NAN macro works], [gl_cv_header_math_nan_works],
    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <math.h>]],
      [[/* Solaris 10 has a broken definition of NAN.  Other platforms
        fail to provide NAN, or provide it only in C99 mode; this
        test only needs to fail when NAN is provided but wrong.  */
         float f = 1.0f;
#ifdef NAN
         f = NAN;
#endif
         return f == 0;]])],
      [gl_cv_header_math_nan_works=yes],
      [gl_cv_header_math_nan_works=no])])
  if test $gl_cv_header_math_nan_works = no; then
    REPLACE_NAN=1
  fi
  AC_CACHE_CHECK([whether HUGE_VAL works], [gl_cv_header_math_huge_val_works],
    [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include <math.h>]],
      [[/* Solaris 10 has a broken definition of HUGE_VAL.  */
         double d = HUGE_VAL;
         return d == 0;]])],
      [gl_cv_header_math_huge_val_works=yes],
      [gl_cv_header_math_huge_val_works=no])])
  if test $gl_cv_header_math_huge_val_works = no; then
    REPLACE_HUGE_VAL=1
  fi

  dnl Check for declarations of anything we want to poison if the
  dnl corresponding gnulib module is not in use.
  gl_WARN_ON_USE_PREPARE([[#include <math.h>]],
    [acosl asinl atanl ceilf ceill cosl expf expl fabsf floorf floorl fmodf
     frexpf frexpl
     ldexpf ldexpl logb logf logl log10f modff powf
     round roundf roundl sinf sinl sqrtf sqrtl
     tanl trunc truncf truncl])
])

AC_DEFUN([gl_MATH_MODULE_INDICATOR],
[
  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.
  AC_REQUIRE([gl_MATH_H_DEFAULTS])
  gl_MODULE_INDICATOR_SET_VARIABLE([$1])
  dnl Define it also as a C macro, for the benefit of the unit tests.
  gl_MODULE_INDICATOR_FOR_TESTS([$1])
])

AC_DEFUN([gl_MATH_H_DEFAULTS],
[
  GNULIB_ACOSL=0;    AC_SUBST([GNULIB_ACOSL])
  GNULIB_ASINL=0;    AC_SUBST([GNULIB_ASINL])
  GNULIB_ATANL=0;    AC_SUBST([GNULIB_ATANL])
  GNULIB_CEIL=0;     AC_SUBST([GNULIB_CEIL])
  GNULIB_CEILF=0;    AC_SUBST([GNULIB_CEILF])
  GNULIB_CEILL=0;    AC_SUBST([GNULIB_CEILL])
  GNULIB_COSL=0;     AC_SUBST([GNULIB_COSL])
  GNULIB_EXPF=0;     AC_SUBST([GNULIB_EXPF])
  GNULIB_EXPL=0;     AC_SUBST([GNULIB_EXPL])
  GNULIB_FABSF=0;    AC_SUBST([GNULIB_FABSF])
  GNULIB_FLOOR=0;    AC_SUBST([GNULIB_FLOOR])
  GNULIB_FLOORF=0;   AC_SUBST([GNULIB_FLOORF])
  GNULIB_FLOORL=0;   AC_SUBST([GNULIB_FLOORL])
  GNULIB_FMODF=0;    AC_SUBST([GNULIB_FMODF])
  GNULIB_FREXPF=0;   AC_SUBST([GNULIB_FREXPF])
  GNULIB_FREXP=0;    AC_SUBST([GNULIB_FREXP])
  GNULIB_FREXPL=0;   AC_SUBST([GNULIB_FREXPL])
  GNULIB_ISFINITE=0; AC_SUBST([GNULIB_ISFINITE])
  GNULIB_ISINF=0;    AC_SUBST([GNULIB_ISINF])
  GNULIB_ISNAN=0;    AC_SUBST([GNULIB_ISNAN])
  GNULIB_ISNANF=0;   AC_SUBST([GNULIB_ISNANF])
  GNULIB_ISNAND=0;   AC_SUBST([GNULIB_ISNAND])
  GNULIB_ISNANL=0;   AC_SUBST([GNULIB_ISNANL])
  GNULIB_LDEXPF=0;   AC_SUBST([GNULIB_LDEXPF])
  GNULIB_LDEXPL=0;   AC_SUBST([GNULIB_LDEXPL])
  GNULIB_LOGB=0;     AC_SUBST([GNULIB_LOGB])
  GNULIB_LOGF=0;     AC_SUBST([GNULIB_LOGF])
  GNULIB_LOGL=0;     AC_SUBST([GNULIB_LOGL])
  GNULIB_LOG10F=0;   AC_SUBST([GNULIB_LOG10F])
  GNULIB_MODFF=0;    AC_SUBST([GNULIB_MODFF])
  GNULIB_POWF=0;     AC_SUBST([GNULIB_POWF])
  GNULIB_ROUND=0;    AC_SUBST([GNULIB_ROUND])
  GNULIB_ROUNDF=0;   AC_SUBST([GNULIB_ROUNDF])
  GNULIB_ROUNDL=0;   AC_SUBST([GNULIB_ROUNDL])
  GNULIB_SIGNBIT=0;  AC_SUBST([GNULIB_SIGNBIT])
  GNULIB_SINF=0;     AC_SUBST([GNULIB_SINF])
  GNULIB_SINL=0;     AC_SUBST([GNULIB_SINL])
  GNULIB_SQRTF=0;    AC_SUBST([GNULIB_SQRTF])
  GNULIB_SQRTL=0;    AC_SUBST([GNULIB_SQRTL])
  GNULIB_TANL=0;     AC_SUBST([GNULIB_TANL])
  GNULIB_TRUNC=0;    AC_SUBST([GNULIB_TRUNC])
  GNULIB_TRUNCF=0;   AC_SUBST([GNULIB_TRUNCF])
  GNULIB_TRUNCL=0;   AC_SUBST([GNULIB_TRUNCL])
  dnl Assume proper GNU behavior unless another module says otherwise.
  HAVE_ACOSL=1;                AC_SUBST([HAVE_ACOSL])
  HAVE_ASINL=1;                AC_SUBST([HAVE_ASINL])
  HAVE_ATANL=1;                AC_SUBST([HAVE_ATANL])
  HAVE_COSL=1;                 AC_SUBST([HAVE_COSL])
  HAVE_EXPF=1;                 AC_SUBST([HAVE_EXPF])
  HAVE_EXPL=1;                 AC_SUBST([HAVE_EXPL])
  HAVE_FABSF=1;                AC_SUBST([HAVE_FABSF])
  HAVE_FMODF=1;                AC_SUBST([HAVE_FMODF])
  HAVE_FREXPF=1;               AC_SUBST([HAVE_FREXPF])
  HAVE_ISNANF=1;               AC_SUBST([HAVE_ISNANF])
  HAVE_ISNAND=1;               AC_SUBST([HAVE_ISNAND])
  HAVE_ISNANL=1;               AC_SUBST([HAVE_ISNANL])
  HAVE_LDEXPF=1;               AC_SUBST([HAVE_LDEXPF])
  HAVE_LOGF=1;                 AC_SUBST([HAVE_LOGF])
  HAVE_LOGL=1;                 AC_SUBST([HAVE_LOGL])
  HAVE_LOG10F=1;               AC_SUBST([HAVE_LOG10F])
  HAVE_MODFF=1;                AC_SUBST([HAVE_MODFF])
  HAVE_POWF=1;                 AC_SUBST([HAVE_POWF])
  HAVE_SINF=1;                 AC_SUBST([HAVE_SINF])
  HAVE_SINL=1;                 AC_SUBST([HAVE_SINL])
  HAVE_SQRTF=1;                AC_SUBST([HAVE_SQRTF])
  HAVE_SQRTL=1;                AC_SUBST([HAVE_SQRTL])
  HAVE_TANL=1;                 AC_SUBST([HAVE_TANL])
  HAVE_DECL_ACOSL=1;           AC_SUBST([HAVE_DECL_ACOSL])
  HAVE_DECL_ASINL=1;           AC_SUBST([HAVE_DECL_ASINL])
  HAVE_DECL_ATANL=1;           AC_SUBST([HAVE_DECL_ATANL])
  HAVE_DECL_CEILF=1;           AC_SUBST([HAVE_DECL_CEILF])
  HAVE_DECL_CEILL=1;           AC_SUBST([HAVE_DECL_CEILL])
  HAVE_DECL_COSL=1;            AC_SUBST([HAVE_DECL_COSL])
  HAVE_DECL_EXPL=1;            AC_SUBST([HAVE_DECL_EXPL])
  HAVE_DECL_FLOORF=1;          AC_SUBST([HAVE_DECL_FLOORF])
  HAVE_DECL_FLOORL=1;          AC_SUBST([HAVE_DECL_FLOORL])
  HAVE_DECL_FREXPL=1;          AC_SUBST([HAVE_DECL_FREXPL])
  HAVE_DECL_LDEXPL=1;          AC_SUBST([HAVE_DECL_LDEXPL])
  HAVE_DECL_LOGB=1;            AC_SUBST([HAVE_DECL_LOGB])
  HAVE_DECL_LOGL=1;            AC_SUBST([HAVE_DECL_LOGL])
  HAVE_DECL_ROUND=1;           AC_SUBST([HAVE_DECL_ROUND])
  HAVE_DECL_ROUNDF=1;          AC_SUBST([HAVE_DECL_ROUNDF])
  HAVE_DECL_ROUNDL=1;          AC_SUBST([HAVE_DECL_ROUNDL])
  HAVE_DECL_SINL=1;            AC_SUBST([HAVE_DECL_SINL])
  HAVE_DECL_SQRTL=1;           AC_SUBST([HAVE_DECL_SQRTL])
  HAVE_DECL_TANL=1;            AC_SUBST([HAVE_DECL_TANL])
  HAVE_DECL_TRUNC=1;           AC_SUBST([HAVE_DECL_TRUNC])
  HAVE_DECL_TRUNCF=1;          AC_SUBST([HAVE_DECL_TRUNCF])
  HAVE_DECL_TRUNCL=1;          AC_SUBST([HAVE_DECL_TRUNCL])
  REPLACE_CEIL=0;              AC_SUBST([REPLACE_CEIL])
  REPLACE_CEILF=0;             AC_SUBST([REPLACE_CEILF])
  REPLACE_CEILL=0;             AC_SUBST([REPLACE_CEILL])
  REPLACE_FLOOR=0;             AC_SUBST([REPLACE_FLOOR])
  REPLACE_FLOORF=0;            AC_SUBST([REPLACE_FLOORF])
  REPLACE_FLOORL=0;            AC_SUBST([REPLACE_FLOORL])
  REPLACE_FREXPF=0;            AC_SUBST([REPLACE_FREXPF])
  REPLACE_FREXP=0;             AC_SUBST([REPLACE_FREXP])
  REPLACE_FREXPL=0;            AC_SUBST([REPLACE_FREXPL])
  REPLACE_HUGE_VAL=0;          AC_SUBST([REPLACE_HUGE_VAL])
  REPLACE_ISFINITE=0;          AC_SUBST([REPLACE_ISFINITE])
  REPLACE_ISINF=0;             AC_SUBST([REPLACE_ISINF])
  REPLACE_ISNAN=0;             AC_SUBST([REPLACE_ISNAN])
  REPLACE_LDEXPL=0;            AC_SUBST([REPLACE_LDEXPL])
  REPLACE_NAN=0;               AC_SUBST([REPLACE_NAN])
  REPLACE_ROUND=0;             AC_SUBST([REPLACE_ROUND])
  REPLACE_ROUNDF=0;            AC_SUBST([REPLACE_ROUNDF])
  REPLACE_ROUNDL=0;            AC_SUBST([REPLACE_ROUNDL])
  REPLACE_SIGNBIT=0;           AC_SUBST([REPLACE_SIGNBIT])
  REPLACE_SIGNBIT_USING_GCC=0; AC_SUBST([REPLACE_SIGNBIT_USING_GCC])
  REPLACE_TRUNC=0;             AC_SUBST([REPLACE_TRUNC])
  REPLACE_TRUNCF=0;            AC_SUBST([REPLACE_TRUNCF])
  REPLACE_TRUNCL=0;            AC_SUBST([REPLACE_TRUNCL])
])