summaryrefslogtreecommitdiff
path: root/gnulib-m4/setlocale_null.m4
diff options
context:
space:
mode:
Diffstat (limited to 'gnulib-m4/setlocale_null.m4')
-rw-r--r--gnulib-m4/setlocale_null.m498
1 files changed, 98 insertions, 0 deletions
diff --git a/gnulib-m4/setlocale_null.m4 b/gnulib-m4/setlocale_null.m4
new file mode 100644
index 00000000..09ea50ea
--- /dev/null
+++ b/gnulib-m4/setlocale_null.m4
@@ -0,0 +1,98 @@
+# setlocale_null.m4 serial 5
+dnl Copyright (C) 2019-2022 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 "$host_os" in
+ # Guess no on musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Haiku, Cygwin.
+ *-musl* | darwin* | freebsd* | midnightbsd* | netbsd* | openbsd* | aix* | haiku* | cygwin*)
+ gl_cv_func_setlocale_null_all_mtsafe=no ;;
+ # Guess yes on glibc, HP-UX, IRIX, Solaris, native Windows.
+ *-gnu* | gnu* | hpux* | irix* | solaris* | mingw*)
+ gl_cv_func_setlocale_null_all_mtsafe=yes ;;
+ # If we don't know, obey --enable-cross-guesses.
+ *)
+ gl_cv_func_setlocale_null_all_mtsafe="$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* | 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*) 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
+])