kc3-lang/gnulib/m4/fmodl.m4

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• Hash : 86a9695e
  Author :
  Date : 2023-02-17T16:24:34
  

  Improve cross-compilation from midipix.
  
  Reported by Ørjan Malde <red@foxi.me> at
  <https://lists.gnu.org/archive/html/bug-gnulib/2023-02/msg00131.html>.
  
  Since midipix consists of musl libc based on an emulation of Linux system
  calls, for pure libc functionality it can be treated like musl libc.
  
  * m4/calloc.m4 (_AC_FUNC_CALLOC_IF): Treat midipix like systems with
  musl libc.
  * m4/cbrtl.m4 (gl_FUNC_CBRTL): Likewise.
  * m4/ceil.m4 (gl_FUNC_CEIL): Likewise.
  * m4/ceilf.m4 (gl_FUNC_CEILF): Likewise.
  * m4/ceill.m4 (gl_FUNC_CEILL): Likewise.
  * m4/exp2l.m4 (gl_FUNC_EXP2L): Likewise.
  * m4/expl.m4 (gl_FUNC_EXPL): Likewise.
  * m4/expm1.m4 (gl_FUNC_EXPM1): Likewise.
  * m4/expm1f.m4 (gl_FUNC_EXPM1F): Likewise.
  * m4/expm1l.m4 (gl_FUNC_EXPM1L): Likewise.
  * m4/fclose.m4 (gl_FUNC_FCLOSE_STDIN): Likewise.
  * m4/fdopendir.m4 (gl_FUNC_FDOPENDIR): Likewise.
  * m4/ffsll.m4 (gl_FUNC_FFSLL): Likewise.
  * m4/floor.m4 (gl_FUNC_FLOOR): Likewise.
  * m4/floorf.m4 (gl_FUNC_FLOORF): Likewise.
  * m4/fmod.m4 (gl_FUNC_FMOD): Likewise.
  * m4/fmodf.m4 (gl_FUNC_FMODF): Likewise.
  * m4/fmodl.m4 (gl_FUNC_FMODL): Likewise.
  * m4/fnmatch.m4 (gl_FUNC_FNMATCH_POSIX): Likewise.
  * m4/fopen.m4 (gl_FUNC_FOPEN_GNU): Likewise.
  * m4/fpurge.m4 (gl_FUNC_FPURGE): Likewise.
  * m4/getdelim.m4 (gl_FUNC_GETDELIM): Likewise.
  * m4/getline.m4 (gl_FUNC_GETLINE): Likewise.
  * m4/hypot.m4 (gl_FUNC_HYPOT): Likewise.
  * m4/hypotf.m4 (gl_FUNC_HYPOTF): Likewise.
  * m4/hypotl.m4 (gl_FUNC_HYPOTL): Likewise.
  * m4/iconv_open-utf.m4 (gl_FUNC_ICONV_OPEN_UTF_SUPPORT): Likewise.
  * m4/log.m4 (gl_FUNC_LOG): Likewise.
  * m4/log10.m4 (gl_FUNC_LOG10): Likewise.
  * m4/log10f.m4 (gl_FUNC_LOG10F): Likewise.
  * m4/log10l.m4 (gl_FUNC_LOG10L_WORKS): Likewise.
  * m4/log1p.m4 (gl_FUNC_LOG1P): Likewise.
  * m4/log1pf.m4 (gl_FUNC_LOG1PF): Likewise.
  * m4/log1pl.m4 (gl_FUNC_LOG1PL, gl_FUNC_LOG1PL_WORKS): Likewise.
  * m4/log2.m4 (gl_FUNC_LOG2): Likewise.
  * m4/log2f.m4 (gl_FUNC_LOG2F): Likewise.
  * m4/log2l.m4 (gl_FUNC_LOG2L_WORKS): Likewise.
  * m4/logf.m4 (gl_FUNC_LOGF): Likewise.
  * m4/logl.m4 (gl_FUNC_LOGL_WORKS): Likewise.
  * m4/malloc.m4 (_AC_FUNC_MALLOC_IF): Likewise.
  * m4/mkstemp.m4 (gl_FUNC_MKSTEMP): Likewise.
  * m4/modf.m4 (gl_FUNC_MODF): Likewise.
  * m4/modff.m4 (gl_FUNC_MODFF): Likewise.
  * m4/modfl.m4 (gl_FUNC_MODFL): Likewise.
  * m4/musl.m4 (gl_MUSL_LIBC): Likewise.
  * m4/perror.m4 (gl_FUNC_PERROR): Likewise.
  * m4/posix_spawn.m4 (gl_POSIX_SPAWN_SECURE,
  gl_FUNC_POSIX_SPAWN_FILE_ACTIONS_ADDCLOSE,
  gl_FUNC_POSIX_SPAWN_FILE_ACTIONS_ADDDUP2,
  gl_FUNC_POSIX_SPAWN_FILE_ACTIONS_ADDOPEN): Likewise.
  * m4/printf.m4 (gl_PRINTF_SIZES_C99, gl_PRINTF_INFINITE,
  gl_PRINTF_INFINITE_LONG_DOUBLE, gl_PRINTF_DIRECTIVE_A,
  gl_PRINTF_DIRECTIVE_F, gl_PRINTF_FLAG_ZERO, gl_SNPRINTF_TRUNCATION_C99,
  gl_SNPRINTF_RETVAL_C99, gl_SNPRINTF_DIRECTIVE_N,
  gl_VSNPRINTF_ZEROSIZE_C99): Likewise.
  * m4/pthread_rwlock_rdlock.m4 (gl_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER):
  Likewise.
  * m4/putenv.m4 (gl_FUNC_PUTENV): Likewise.
  * m4/realloc.m4 (_AC_FUNC_REALLOC_IF): Likewise.
  * m4/remainder.m4 (gl_FUNC_REMAINDER): Likewise.
  * m4/remainderf.m4 (gl_FUNC_REMAINDERF): Likewise.
  * m4/remainderl.m4 (gl_FUNC_REMAINDERL, gl_FUNC_REMAINDERL_WORKS):
  Likewise.
  * m4/rintl.m4 (gl_FUNC_RINTL): Likewise.
  * m4/round.m4 (gl_FUNC_ROUND): Likewise.
  * m4/roundf.m4 (gl_FUNC_ROUNDF): Likewise.
  * m4/roundl.m4 (gl_FUNC_ROUNDL): Likewise.
  * m4/setenv.m4 (gl_FUNC_SETENV): Likewise.
  * m4/setlocale_null.m4 (gl_FUNC_SETLOCALE_NULL): Likewise.
  * m4/signbit.m4 (gl_SIGNBIT): Likewise.
  * m4/stpncpy.m4 (gl_FUNC_STPNCPY): Likewise.
  * m4/strerror.m4 (gl_FUNC_STRERROR, gl_FUNC_STRERROR_0): Likewise.
  * m4/strtod.m4 (gl_FUNC_STRTOD): Likewise.
  * m4/strtold.m4 (gl_FUNC_STRTOLD): Likewise.
  * m4/trunc.m4 (gl_FUNC_TRUNC): Likewise.
  * m4/truncf.m4 (gl_FUNC_TRUNCF): Likewise.
  * m4/truncl.m4 (gl_FUNC_TRUNCL): Likewise.
  * m4/ungetc.m4 (gl_FUNC_UNGETC_WORKS): Likewise.
  * m4/wcwidth.m4 (gl_FUNC_WCWIDTH): Likewise.
  

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• m4/fmodl.m4

• # fmodl.m4 serial 12
  dnl Copyright (C) 2011-2023 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_FMODL],
  [
    m4_divert_text([DEFAULTS], [gl_fmodl_required=plain])
    AC_REQUIRE([gl_MATH_H_DEFAULTS])
    AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
    AC_REQUIRE([gl_FUNC_FMOD])
  
    dnl Persuade glibc <math.h> to declare fmodl().
    AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
  
    dnl Test whether fmodl() is declared.
    dnl AIX 5.1 has fmodl() in libc but doesn't declare it in <math.h>, and the
    dnl function produces NaN results for finite values.
    AC_CHECK_DECL([fmodl],
      [ac_cv_have_decl_fmodl=yes], [ac_cv_have_decl_fmodl=no],
      [[#include <math.h>]])
  
    dnl Test whether fmodl() exists. Assume that fmodl(), if it exists, is
    dnl defined in the same library as fmod().
    save_LIBS="$LIBS"
    LIBS="$LIBS $FMOD_LIBM"
    AC_CHECK_FUNCS([fmodl])
    LIBS="$save_LIBS"
    if test $ac_cv_func_fmodl = yes; then
      FMODL_LIBM="$FMOD_LIBM"
      if test $ac_cv_have_decl_fmodl = no; then
        REPLACE_FMODL=1
      fi
      m4_ifdef([gl_FUNC_FMODL_IEEE], [
        if test $gl_fmodl_required = ieee && test $REPLACE_FMODL = 0; then
          AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
          AC_CACHE_CHECK([whether fmodl works according to ISO C 99 with IEC 60559],
            [gl_cv_func_fmodl_ieee],
            [
              save_LIBS="$LIBS"
              LIBS="$LIBS $FMODL_LIBM"
              AC_RUN_IFELSE(
                [AC_LANG_SOURCE([[
  #ifndef __NO_MATH_INLINES
  # define __NO_MATH_INLINES 1 /* for glibc */
  #endif
  #include <math.h>
  /* Compare two numbers with ==.
     This is a separate function because IRIX 6.5 "cc -O" miscompiles an
     'x == x' test.  */
  static int
  numeric_equal (long double x, long double y)
  {
    return x == y;
  }
  static long double dummy (long double x, long double y) { return 0; }
  int main (int argc, char *argv[])
  {
    long double (* volatile my_fmodl) (long double, long double) = argc ? fmodl : dummy;
    long double f;
    /* Test fmodl(...,0.0L).
       This test fails on OSF/1 5.1.  */
    f = my_fmodl (2.0L, 0.0L);
    if (numeric_equal (f, f))
      return 1;
    return 0;
  }
                ]])],
                [gl_cv_func_fmodl_ieee=yes],
                [gl_cv_func_fmodl_ieee=no],
                [case "$host_os" in
                                       # Guess yes on glibc systems.
                   *-gnu* | gnu*)      gl_cv_func_fmodl_ieee="guessing yes" ;;
                                       # Guess yes on musl systems.
                   *-musl* | midipix*) gl_cv_func_fmodl_ieee="guessing yes" ;;
                                       # Guess yes on native Windows.
                   mingw*)             gl_cv_func_fmodl_ieee="guessing yes" ;;
                                       # If we don't know, obey --enable-cross-guesses.
                   *)                  gl_cv_func_fmodl_ieee="$gl_cross_guess_normal" ;;
                 esac
                ])
              LIBS="$save_LIBS"
            ])
          case "$gl_cv_func_fmodl_ieee" in
            *yes) ;;
            *) REPLACE_FMODL=1 ;;
          esac
        fi
      ])
    else
      HAVE_FMODL=0
      dnl If the function is declared but does not appear to exist, it may be
      dnl defined as an inline function. In order to avoid a conflict, we have
      dnl to define rpl_fmodl, not fmodl.
      AC_CHECK_DECLS([fmodl], [REPLACE_FMODL=1], , [[#include <math.h>]])
    fi
    if test $HAVE_FMODL = 0 || test $REPLACE_FMODL = 1; then
      dnl Find libraries needed to link lib/fmodl.c.
      if test $HAVE_SAME_LONG_DOUBLE_AS_DOUBLE = 1; then
        FMODL_LIBM="$FMOD_LIBM"
      else
        AC_REQUIRE([gl_FUNC_FABSL])
        AC_REQUIRE([gl_FUNC_FREXPL])
        AC_REQUIRE([gl_FUNC_TRUNCL])
        AC_REQUIRE([gl_FUNC_LDEXPL])
        AC_REQUIRE([gl_FUNC_ISNANL])
        FMODL_LIBM=
        dnl Append $FABSL_LIBM to FMODL_LIBM, avoiding gratuitous duplicates.
        case " $FMODL_LIBM " in
          *" $FABSL_LIBM "*) ;;
          *) FMODL_LIBM="$FMODL_LIBM $FABSL_LIBM" ;;
        esac
        dnl Append $FREXPL_LIBM to FMODL_LIBM, avoiding gratuitous duplicates.
        case " $FMODL_LIBM " in
          *" $FREXPL_LIBM "*) ;;
          *) FMODL_LIBM="$FMODL_LIBM $FREXPL_LIBM" ;;
        esac
        dnl Append $TRUNCL_LIBM to FMODL_LIBM, avoiding gratuitous duplicates.
        case " $FMODL_LIBM " in
          *" $TRUNCL_LIBM "*) ;;
          *) FMODL_LIBM="$FMODL_LIBM $TRUNCL_LIBM" ;;
        esac
        dnl Append $LDEXPL_LIBM to FMODL_LIBM, avoiding gratuitous duplicates.
        case " $FMODL_LIBM " in
          *" $LDEXPL_LIBM "*) ;;
          *) FMODL_LIBM="$FMODL_LIBM $LDEXPL_LIBM" ;;
        esac
        dnl Append $ISNANL_LIBM to FMODL_LIBM, avoiding gratuitous duplicates.
        case " $FMODL_LIBM " in
          *" $ISNANL_LIBM "*) ;;
          *) FMODL_LIBM="$FMODL_LIBM $ISNANL_LIBM" ;;
        esac
      fi
    fi
    AC_SUBST([FMODL_LIBM])
  ])
  

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