kc3-lang/gnulib/m4/getpayload.m4

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• Hash : 20b8f23d
  Author :
  Date : 2024-04-17T10:57:05
  

  getpayload: New module.
  
  * lib/math.in.h (getpayload): New declaration.
  * lib/getpayload.c: New file.
  * m4/getpayload.m4: New file.
  * m4/math_h.m4 (gl_MATH_H): Test whether getpayload is declared.
  (gl_MATH_H_REQUIRE_DEFAULTS): Initialize GNULIB_GETPAYLOAD.
  (gl_MATH_H_DEFAULTS): Initialize HAVE_GETPAYLOAD, REPLACE_GETPAYLOAD.
  * modules/math (Makefile.am): Substitute GNULIB_GETPAYLOAD,
  HAVE_GETPAYLOAD, REPLACE_GETPAYLOAD.
  * modules/getpayload: New file.
  * doc/posix-functions/getpayload.texi: Mention the new module and the
  glibc bug.
  

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• m4/getpayload.m4

• # getpayload.m4
  # serial 1
  dnl Copyright 2024 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_GETPAYLOADF],
  [
    AC_REQUIRE([gl_MATH_H_DEFAULTS])
    AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  
    gl_MATHFUNC([getpayloadf], [float], [(float const *)])
    if test $gl_cv_func_getpayloadf_no_libm != yes \
       && test $gl_cv_func_getpayloadf_in_libm != yes; then
      HAVE_GETPAYLOADF=0
    else
      dnl glibc versions < 2.32 return a wrong value,
      dnl see <https://sourceware.org/bugzilla/show_bug.cgi?id=26073>.
      AC_CACHE_CHECK([whether getpayloadf works],
        [gl_cv_func_getpayloadf_works],
        [AC_RUN_IFELSE(
           [AC_LANG_PROGRAM(
              [[#include <math.h>
              ]],
              [[float x = 2.718281828459045f;
                return getpayloadf (&x) != -1.0f;
              ]])
           ],
           [gl_cv_func_getpayloadf_works=yes],
           [gl_cv_func_getpayloadf_works=no],
           [case "$host_os" in
              # Guess no on glibc versions < 2.32.
              *-gnu* | gnu*)
                AC_EGREP_CPP([Unlucky],
                  [
  #include <features.h>
  #ifdef __GNU_LIBRARY__
   #if (__GLIBC__ == 2 && __GLIBC_MINOR__ < 32)
    Unlucky GNU user
   #endif
  #endif
                  ],
                  [gl_cv_func_getpayloadf_works="guessing no"],
                  [gl_cv_func_getpayloadf_works="guessing yes"])
                ;;
              # Guess yes otherwise.
              *) gl_cv_func_getpayloadf_works="guessing yes" ;;
            esac
           ])
        ])
      case "$gl_cv_func_getpayloadf_works" in
        *yes) ;;
        *) REPLACE_GETPAYLOADF=1 ;;
      esac
    fi
    if test $HAVE_GETPAYLOADF = 0 || test $REPLACE_GETPAYLOADF = 1; then
      GETPAYLOADF_LIBM='$(ISNANF_LIBM)'
    fi
    AC_SUBST([GETPAYLOADF_LIBM])
  ])
  
  AC_DEFUN_ONCE([gl_FUNC_GETPAYLOAD],
  [
    AC_REQUIRE([gl_MATH_H_DEFAULTS])
    AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  
    gl_MATHFUNC([getpayload], [double], [(double const *)])
    if test $gl_cv_func_getpayload_no_libm != yes \
       && test $gl_cv_func_getpayload_in_libm != yes; then
      HAVE_GETPAYLOAD=0
    else
      dnl glibc versions < 2.32 return a wrong value,
      dnl see <https://sourceware.org/bugzilla/show_bug.cgi?id=26073>.
      AC_CACHE_CHECK([whether getpayload works],
        [gl_cv_func_getpayload_works],
        [AC_RUN_IFELSE(
           [AC_LANG_PROGRAM(
              [[#include <math.h>
              ]],
              [[double x = 2.718281828459045;
                return getpayload (&x) != -1.0;
              ]])
           ],
           [gl_cv_func_getpayload_works=yes],
           [gl_cv_func_getpayload_works=no],
           [case "$host_os" in
              # Guess no on glibc versions < 2.32.
              *-gnu* | gnu*)
                AC_EGREP_CPP([Unlucky],
                  [
  #include <features.h>
  #ifdef __GNU_LIBRARY__
   #if (__GLIBC__ == 2 && __GLIBC_MINOR__ < 32)
    Unlucky GNU user
   #endif
  #endif
                  ],
                  [gl_cv_func_getpayload_works="guessing no"],
                  [gl_cv_func_getpayload_works="guessing yes"])
                ;;
              # Guess yes otherwise.
              *) gl_cv_func_getpayload_works="guessing yes" ;;
            esac
           ])
        ])
      case "$gl_cv_func_getpayload_works" in
        *yes) ;;
        *) REPLACE_GETPAYLOAD=1 ;;
      esac
    fi
    if test $HAVE_GETPAYLOAD = 0 || test $REPLACE_GETPAYLOAD = 1; then
      GETPAYLOAD_LIBM='$(ISNAND_LIBM)'
    fi
    AC_SUBST([GETPAYLOAD_LIBM])
  ])
  
  AC_DEFUN([gl_FUNC_GETPAYLOADL],
  [
    AC_REQUIRE([gl_MATH_H_DEFAULTS])
    AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
    AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
  
    gl_MATHFUNC([getpayloadl], [long double], [(long double const *)])
    if test $gl_cv_func_getpayloadl_no_libm != yes \
       && test $gl_cv_func_getpayloadl_in_libm != yes; then
      HAVE_GETPAYLOADL=0
    else
      dnl glibc versions < 2.32 return a wrong value,
      dnl see <https://sourceware.org/bugzilla/show_bug.cgi?id=26073>.
      AC_CACHE_CHECK([whether getpayloadl works],
        [gl_cv_func_getpayloadl_works],
        [AC_RUN_IFELSE(
           [AC_LANG_PROGRAM(
              [[#include <math.h>
              ]],
              [[long double x = 2.718281828459045L;
                return getpayloadl (&x) != -1.0L;
              ]])
           ],
           [gl_cv_func_getpayloadl_works=yes],
           [gl_cv_func_getpayloadl_works=no],
           [case "$host_os" in
              # Guess no on glibc versions < 2.32.
              *-gnu* | gnu*)
                AC_EGREP_CPP([Unlucky],
                  [
  #include <features.h>
  #ifdef __GNU_LIBRARY__
   #if (__GLIBC__ == 2 && __GLIBC_MINOR__ < 32)
    Unlucky GNU user
   #endif
  #endif
                  ],
                  [gl_cv_func_getpayloadl_works="guessing no"],
                  [gl_cv_func_getpayloadl_works="guessing yes"])
                ;;
              # Guess yes otherwise.
              *) gl_cv_func_getpayloadl_works="guessing yes" ;;
            esac
           ])
        ])
      case "$gl_cv_func_getpayloadl_works" in
        *yes) ;;
        *) REPLACE_GETPAYLOADL=1 ;;
      esac
    fi
    if test $HAVE_GETPAYLOADL = 0 || test $REPLACE_GETPAYLOADL = 1; then
      dnl Find libraries needed to link lib/getpayloadl.c.
      if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
        AC_REQUIRE([gl_FUNC_GETPAYLOAD])
        GETPAYLOADL_LIBM="$GETPAYLOAD_LIBM"
      else
        GETPAYLOADL_LIBM='$(ISNANL_LIBM)'
      fi
      dnl Prerequisite of lib/getpayloadl.c.
      gl_LONG_DOUBLE_EXPONENT_LOCATION
    fi
    AC_SUBST([GETPAYLOADL_LIBM])
  ])
  

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