# math_h.m4 serial 21 dnl Copyright (C) 2007-2010 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 ]], [[/* 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 ]], [[/* 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 ]], [acosl asinl atanl ceilf ceill cosl expl floorf floorl frexpl ldexpl logb logl round roundf roundl sinl 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_CEILF=0; AC_SUBST([GNULIB_CEILF]) GNULIB_CEILL=0; AC_SUBST([GNULIB_CEILL]) GNULIB_COSL=0; AC_SUBST([GNULIB_COSL]) GNULIB_EXPL=0; AC_SUBST([GNULIB_EXPL]) GNULIB_FLOORF=0; AC_SUBST([GNULIB_FLOORF]) GNULIB_FLOORL=0; AC_SUBST([GNULIB_FLOORL]) 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_LDEXPL=0; AC_SUBST([GNULIB_LDEXPL]) GNULIB_LOGB=0; AC_SUBST([GNULIB_LOGB]) GNULIB_LOGL=0; AC_SUBST([GNULIB_LOGL]) 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_SINL=0; AC_SUBST([GNULIB_SINL]) 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_EXPL=1; AC_SUBST([HAVE_EXPL]) HAVE_ISNANF=1; AC_SUBST([HAVE_ISNANF]) HAVE_ISNAND=1; AC_SUBST([HAVE_ISNAND]) HAVE_ISNANL=1; AC_SUBST([HAVE_ISNANL]) HAVE_LOGL=1; AC_SUBST([HAVE_LOGL]) HAVE_SINL=1; AC_SUBST([HAVE_SINL]) 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_CEILF=0; AC_SUBST([REPLACE_CEILF]) REPLACE_CEILL=0; AC_SUBST([REPLACE_CEILL]) REPLACE_FLOORF=0; AC_SUBST([REPLACE_FLOORF]) REPLACE_FLOORL=0; AC_SUBST([REPLACE_FLOORL]) 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_TRUNCL=0; AC_SUBST([REPLACE_TRUNCL]) ])