setlocale_null.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/setlocale_null.m4

# setlocale_null.m4 serial 8
dnl Copyright (C) 2019-2023 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_SETLOCALE_NULL],
[
  AC_REQUIRE([AC_CANONICAL_HOST])
  AC_REQUIRE([gl_PTHREADLIB])
  AC_CHECK_HEADERS_ONCE([threads.h])

  AC_CACHE_CHECK([whether setlocale (LC_ALL, NULL) is multithread-safe],
    [gl_cv_func_setlocale_null_all_mtsafe],
    [case "$host_os" in
       # Guess no on musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Haiku.
       *-musl* | midipix* | darwin* | freebsd* | midnightbsd* | netbsd* | openbsd* | aix* | haiku*)
         gl_cv_func_setlocale_null_all_mtsafe=no ;;
       # Guess no on Cygwin < 3.4.6.
       cygwin*)
         AC_EGREP_CPP([Lucky user],
           [
#if defined __CYGWIN__
 #include <cygwin/version.h>
 #if CYGWIN_VERSION_DLL_COMBINED >= CYGWIN_VERSION_DLL_MAKE_COMBINED (3004, 6)
  Lucky user
 #endif
#endif
          ],
          [gl_cv_func_setlocale_null_all_mtsafe=yes],
          [gl_cv_func_setlocale_null_all_mtsafe=no])
        ;;
       # Guess yes on glibc, HP-UX, IRIX, Solaris, native Windows.
       *-gnu* | gnu* | hpux* | irix* | solaris* | mingw*)
         gl_cv_func_setlocale_null_all_mtsafe=yes ;;
       # If we don't know, obey --enable-cross-guesses.
       *)
         gl_cv_func_setlocale_null_all_mtsafe="$gl_cross_guess_normal" ;;
     esac
    ])
  dnl On platforms without multithreading, there is no issue.
  case "$host_os" in
    mingw*) ;;
    *)
      if test $gl_pthread_api = no && test $ac_cv_header_threads_h = no; then
        gl_cv_func_setlocale_null_all_mtsafe="trivially yes"
      fi
      ;;
  esac
  case "$gl_cv_func_setlocale_null_all_mtsafe" in
    *yes) SETLOCALE_NULL_ALL_MTSAFE=1 ;;
    *)    SETLOCALE_NULL_ALL_MTSAFE=0 ;;
  esac
  AC_DEFINE_UNQUOTED([SETLOCALE_NULL_ALL_MTSAFE], [$SETLOCALE_NULL_ALL_MTSAFE],
    [Define to 1 if setlocale (LC_ALL, NULL) is multithread-safe.])

  dnl This is about a single category (not LC_ALL).
  AC_CACHE_CHECK([whether setlocale (category, NULL) is multithread-safe],
    [gl_cv_func_setlocale_null_one_mtsafe],
    [case "$host_os" in
       # Guess no on OpenBSD, AIX.
       openbsd* | aix*)
         gl_cv_func_setlocale_null_one_mtsafe=no ;;
       # Guess yes on glibc, musl libc, macOS, FreeBSD, NetBSD, HP-UX, IRIX, Solaris, Haiku, Cygwin, native Windows.
       *-gnu* | gnu* | *-musl* | midipix* | darwin* | freebsd* | midnightbsd* | netbsd* | hpux* | irix* | solaris* | haiku* | cygwin* | mingw*)
         gl_cv_func_setlocale_null_one_mtsafe=yes ;;
       # If we don't know, obey --enable-cross-guesses.
       *)
         gl_cv_func_setlocale_null_one_mtsafe="$gl_cross_guess_normal" ;;
     esac
    ])
  dnl On platforms without multithreading, there is no issue.
  case "$host_os" in
    mingw*) ;;
    *)
      if test $gl_pthread_api = no && test $ac_cv_header_threads_h = no; then
        gl_cv_func_setlocale_null_one_mtsafe="trivially yes"
      fi
      ;;
  esac
  case "$gl_cv_func_setlocale_null_one_mtsafe" in
    *yes) SETLOCALE_NULL_ONE_MTSAFE=1 ;;
    *)    SETLOCALE_NULL_ONE_MTSAFE=0 ;;
  esac
  AC_DEFINE_UNQUOTED([SETLOCALE_NULL_ONE_MTSAFE], [$SETLOCALE_NULL_ONE_MTSAFE],
    [Define to 1 if setlocale (category, NULL) is multithread-safe.])

  dnl Determine link dependencies of lib/setlocale_null.c and lib/setlocale-lock.c.
  if test $SETLOCALE_NULL_ALL_MTSAFE = 0 || test $SETLOCALE_NULL_ONE_MTSAFE = 0; then
    case "$host_os" in
      mingw*) SETLOCALE_NULL_LIB= ;;
      *)
        gl_WEAK_SYMBOLS
        case "$gl_cv_have_weak" in
          *yes) SETLOCALE_NULL_LIB= ;;
          *)    SETLOCALE_NULL_LIB="$LIBPTHREAD" ;;
        esac
        ;;
    esac
  else
    SETLOCALE_NULL_LIB=
  fi
  dnl SETLOCALE_NULL_LIB is expected to be '-pthread' or '-lpthread' on AIX
  dnl with gcc or xlc, and empty otherwise.
  AC_SUBST([SETLOCALE_NULL_LIB])
  dnl For backward compatibility.
  LIB_SETLOCALE_NULL="$SETLOCALE_NULL_LIB"
  AC_SUBST([LIB_SETLOCALE_NULL])
])

# Prerequisites of lib/setlocale-lock.c.
AC_DEFUN([gl_PREREQ_SETLOCALE_LOCK],
[
  gl_VISIBILITY
])

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kc3-lang/gnulib/m4/setlocale_null.m4

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m4/setlocale_null.m4