kc3-lang/gnulib/m4/floorl.m4

• Show log

  Commit

• Hash : 32a72f45
  Author :
  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

Download

• m4/floorl.m4

• # floorl.m4 serial 11
  dnl Copyright (C) 2007, 2009-2023 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_FLOORL],
  [
    AC_REQUIRE([gl_MATH_H_DEFAULTS])
    AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
  
    dnl Persuade glibc <math.h> to declare floorl().
    AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
  
    dnl Test whether floorl() is declared.
    AC_CHECK_DECLS([floorl], , , [[#include <math.h>]])
    if test "$ac_cv_have_decl_floorl" = yes; then
      dnl Test whether floorl() can be used without libm.
      gl_FUNC_FLOORL_LIBS
      if test "$FLOORL_LIBM" = "?"; then
        dnl Sun C 5.0 on Solaris declares floorl() and has it in the system-wide
        dnl libm.so, but not in the libm.so that the compiler uses.
        REPLACE_FLOORL=1
      fi
    else
      HAVE_DECL_FLOORL=0
    fi
    if test $HAVE_DECL_FLOORL = 0 || test $REPLACE_FLOORL = 1; then
      dnl Find libraries needed to link lib/floorl.c.
      if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
        AC_REQUIRE([gl_FUNC_FLOOR])
        FLOORL_LIBM="$FLOOR_LIBM"
      else
        FLOORL_LIBM=
      fi
    fi
    AC_SUBST([FLOORL_LIBM])
  ])
  
  # Determines the libraries needed to get the floorl() function.
  # Sets FLOORL_LIBM.
  AC_DEFUN([gl_FUNC_FLOORL_LIBS],
  [
    gl_CACHE_VAL_SILENT([gl_cv_func_floorl_libm], [
      gl_cv_func_floorl_libm=?
      AC_LINK_IFELSE(
        [AC_LANG_PROGRAM(
           [[#ifndef __NO_MATH_INLINES
             # define __NO_MATH_INLINES 1 /* for glibc */
             #endif
             #include <math.h>
             long double (*funcptr) (long double) = floorl;
             long double x;]],
           [[x = funcptr (x) + floorl(x);]])],
        [gl_cv_func_floorl_libm=])
      if test "$gl_cv_func_floorl_libm" = "?"; then
        save_LIBS="$LIBS"
        LIBS="$LIBS -lm"
        AC_LINK_IFELSE(
          [AC_LANG_PROGRAM(
             [[#ifndef __NO_MATH_INLINES
               # define __NO_MATH_INLINES 1 /* for glibc */
               #endif
               #include <math.h>
               long double (*funcptr) (long double) = floorl;
               long double x;]],
             [[x = funcptr (x) + floorl(x);]])],
          [gl_cv_func_floorl_libm="-lm"])
        LIBS="$save_LIBS"
      fi
    ])
    FLOORL_LIBM="$gl_cv_func_floorl_libm"
  ])
  

Download