diff options
Diffstat (limited to 'gnulib/m4/roundl.m4')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/m4/roundl.m4 | 99 |
2 files changed, 99 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/m4/roundl.m4 b/gnulib/m4/roundl.m4 new file mode 100644 index 0000000..fcabe9e --- /dev/null +++ b/gnulib/m4/roundl.m4 @@ -0,0 +1,99 @@ +# roundl.m4 serial 13 +dnl Copyright (C) 2007, 2009-2011 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_FUNC_ROUNDL], +[ + m4_divert_text([DEFAULTS], [gl_roundl_required=plain]) + AC_REQUIRE([gl_MATH_H_DEFAULTS]) + AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE]) + + dnl Persuade glibc <math.h> to declare roundl(). + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + + AC_CHECK_DECLS([roundl], , , [[#include <math.h>]]) + if test "$ac_cv_have_decl_roundl" = yes; then + gl_CHECK_MATH_LIB([ROUNDL_LIBM], [x = roundl (x);]) + if test "$ROUNDL_LIBM" = missing; then + REPLACE_ROUNDL=1 + fi + m4_ifdef([gl_FUNC_ROUNDL_IEEE], [ + if test $gl_roundl_required = ieee && test $REPLACE_ROUNDL = 0; then + AC_CACHE_CHECK([whether roundl works according to ISO C 99 with IEC 60559], + [gl_cv_func_roundl_ieee], + [ + save_LIBS="$LIBS" + LIBS="$LIBS $ROUNDL_LIBM" + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#ifndef __NO_MATH_INLINES +# define __NO_MATH_INLINES 1 /* for glibc */ +#endif +#include <math.h> +]gl_LONG_DOUBLE_MINUS_ZERO_CODE[ +]gl_LONG_DOUBLE_SIGNBIT_CODE[ +static long double dummy (long double f) { return 0; } +int main (int argc, char *argv[]) +{ + long double (*my_roundl) (long double) = argc ? roundl : dummy; + int result = 0; + /* Test whether roundl (-0.0L) is -0.0L. */ + if (signbitl (minus_zerol) && !signbitl (my_roundl (minus_zerol))) + result |= 1; + /* Test whether roundl (-0.3L) is -0.0L. */ + if (signbitl (-0.3L) && !signbitl (my_roundl (-0.3L))) + result |= 2; + return result; +} + ]])], + [gl_cv_func_roundl_ieee=yes], + [gl_cv_func_roundl_ieee=no], + [gl_cv_func_roundl_ieee="guessing no"]) + LIBS="$save_LIBS" + ]) + case "$gl_cv_func_roundl_ieee" in + *yes) ;; + *) REPLACE_ROUNDL=1 ;; + esac + fi + ]) + else + HAVE_DECL_ROUNDL=0 + fi + if test $HAVE_DECL_ROUNDL = 0 || test $REPLACE_ROUNDL = 1; then + dnl Find libraries needed to link lib/roundl.c. + if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then + AC_REQUIRE([gl_FUNC_ROUND]) + ROUNDL_LIBM="$ROUND_LIBM" + else + AC_CHECK_DECLS([ceill, floorl], , , [[#include <math.h>]]) + if test "$ac_cv_have_decl_floorl" = yes \ + && test "$ac_cv_have_decl_ceill" = yes; then + gl_FUNC_FLOORL_LIBS + gl_FUNC_CEILL_LIBS + if test "$FLOORL_LIBM" != '?' && test "$CEILL_LIBM" != '?'; then + AC_DEFINE([HAVE_FLOORL_AND_CEILL], [1], + [Define if the both the floorl() and ceill() functions exist.]) + ROUNDL_LIBM= + dnl Append $FLOORL_LIBM to ROUNDL_LIBM, avoiding gratuitous duplicates. + case " $ROUNDL_LIBM " in + *" $FLOORL_LIBM "*) ;; + *) ROUNDL_LIBM="$ROUNDL_LIBM $FLOORL_LIBM" ;; + esac + dnl Append $CEILL_LIBM to ROUNDL_LIBM, avoiding gratuitous duplicates. + case " $ROUNDL_LIBM " in + *" $CEILL_LIBM "*) ;; + *) ROUNDL_LIBM="$ROUNDL_LIBM $CEILL_LIBM" ;; + esac + else + ROUNDL_LIBM= + fi + else + ROUNDL_LIBM= + fi + fi + fi + AC_SUBST([ROUNDL_LIBM]) +]) |