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# setlocale_null.m4 serial 4
dnl Copyright (C) 2019-2021 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 "$host_os" in
# Guess no on musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Haiku, Cygwin.
*-musl* | darwin* | freebsd* | netbsd* | openbsd* | aix* | haiku* | cygwin*)
gl_cv_func_setlocale_null_all_mtsafe=no ;;
# Guess yes on glibc, HP-UX, IRIX, Solaris, native Windows.
*-gnu* | gnu* | hpux* | irix* | solaris* | mingw*)
gl_cv_func_setlocale_null_all_mtsafe=yes ;;
# If we don't know, obey --enable-cross-guesses.
*)
gl_cv_func_setlocale_null_all_mtsafe="$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* | darwin* | freebsd* | 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*) LIB_SETLOCALE_NULL= ;;
*)
gl_WEAK_SYMBOLS
case "$gl_cv_have_weak" in
*yes) LIB_SETLOCALE_NULL= ;;
*) LIB_SETLOCALE_NULL="$LIBPTHREAD" ;;
esac
;;
esac
else
LIB_SETLOCALE_NULL=
fi
dnl LIB_SETLOCALE_NULL is expected to be '-pthread' or '-lpthread' on AIX
dnl with gcc or xlc, and empty otherwise.
AC_SUBST([LIB_SETLOCALE_NULL])
])
# Prerequisites of lib/setlocale-lock.c.
AC_DEFUN([gl_PREREQ_SETLOCALE_LOCK],
[
gl_VISIBILITY
])
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