strerror.m4

Show log
Commit

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.

Download

m4/strerror.m4

# strerror.m4 serial 24
dnl Copyright (C) 2002, 2007-2023 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_STRERROR],
[
  AC_REQUIRE([gl_STRING_H_DEFAULTS])
  AC_REQUIRE([gl_HEADER_ERRNO_H])
  AC_REQUIRE([gl_FUNC_STRERROR_0])
  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  m4_ifdef([gl_FUNC_STRERROR_R_WORKS], [
    AC_REQUIRE([gl_FUNC_STRERROR_R_WORKS])
  ])
  if test "$GL_GENERATE_ERRNO_H:$REPLACE_STRERROR_0" = false:0; then
    AC_CACHE_CHECK([for working strerror function],
     [gl_cv_func_working_strerror],
     [AC_RUN_IFELSE(
        [AC_LANG_PROGRAM(
           [[#include <string.h>
           ]],
           [[if (!*strerror (-2)) return 1;]])],
        [gl_cv_func_working_strerror=yes],
        [gl_cv_func_working_strerror=no],
        [case "$host_os" in
                               # Guess yes on glibc systems.
           *-gnu* | gnu*)      gl_cv_func_working_strerror="guessing yes" ;;
                               # Guess yes on musl systems.
           *-musl* | midipix*) gl_cv_func_working_strerror="guessing yes" ;;
                               # If we don't know, obey --enable-cross-guesses.
           *)                  gl_cv_func_working_strerror="$gl_cross_guess_normal" ;;
         esac
        ])
    ])
    case "$gl_cv_func_working_strerror" in
      *yes) ;;
      *)
        dnl The system's strerror() fails to return a string for out-of-range
        dnl integers. Replace it.
        REPLACE_STRERROR=1
        ;;
    esac
    m4_ifdef([gl_FUNC_STRERROR_R_WORKS], [
      dnl If the system's strerror_r or __xpg_strerror_r clobbers strerror's
      dnl buffer, we must replace strerror.
      case "$gl_cv_func_strerror_r_works" in
        *no) REPLACE_STRERROR=1 ;;
      esac
    ])
  else
    dnl The system's strerror() cannot know about the new errno values we add
    dnl to <errno.h>, or any fix for strerror(0). Replace it.
    REPLACE_STRERROR=1
  fi
])

dnl Detect if strerror(0) passes (that is, does not set errno, and does not
dnl return a string that matches strerror(-1)).
AC_DEFUN([gl_FUNC_STRERROR_0],
[
  AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
  REPLACE_STRERROR_0=0
  AC_CACHE_CHECK([whether strerror(0) succeeds],
   [gl_cv_func_strerror_0_works],
   [AC_RUN_IFELSE(
      [AC_LANG_PROGRAM(
         [[#include <string.h>
           #include <errno.h>
         ]],
         [[int result = 0;
           char *str;
           errno = 0;
           str = strerror (0);
           if (!*str) result |= 1;
           if (errno) result |= 2;
           if (strstr (str, "nknown") || strstr (str, "ndefined"))
             result |= 4;
           return result;]])],
      [gl_cv_func_strerror_0_works=yes],
      [gl_cv_func_strerror_0_works=no],
      [case "$host_os" in
                             # Guess yes on glibc systems.
         *-gnu* | gnu*)      gl_cv_func_strerror_0_works="guessing yes" ;;
                             # Guess yes on musl systems.
         *-musl* | midipix*) gl_cv_func_strerror_0_works="guessing yes" ;;
                             # Guess yes on native Windows.
         mingw*)             gl_cv_func_strerror_0_works="guessing yes" ;;
                             # If we don't know, obey --enable-cross-guesses.
         *)                  gl_cv_func_strerror_0_works="$gl_cross_guess_normal" ;;
       esac
      ])
  ])
  case "$gl_cv_func_strerror_0_works" in
    *yes) ;;
    *)
      REPLACE_STRERROR_0=1
      AC_DEFINE([REPLACE_STRERROR_0], [1], [Define to 1 if strerror(0)
        does not return a message implying success.])
      ;;
  esac
])

Download

kc3-lang/gnulib/m4/strerror.m4

Commit

m4/strerror.m4