From: Paul Eggert <eggert@cs.ucla.edu>
Date: Wed, 30 Aug 2023 23:59:39 +0000 (-0700)
Subject: maint: tune for single thread & locale
X-Git-Tag: v9.5~179
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=af2137407161bb7a76f790d759f5a8db6b519b9e;p=thirdparty%2Fcoreutils.git

maint: tune for single thread & locale

* configure.ac (GNULIB_EXCLUDE_SINGLE_THREAD)
(GNULIB_REGEX_SINGLE_THREAD, GNULIB_WCHAR_SINGLE_LOCALE):
Define.
---

diff --git a/configure.ac b/configure.ac
index 2c7cdeef62..f2500a0a4c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -64,6 +64,22 @@ gl_SET_CRYPTO_CHECK_DEFAULT([auto-gpl-compat])
 gl_INIT
 coreutils_MACROS
 
+# These are safe, since 'sort', coreutils's only multithreaded app,
+# does not use the relevant modules.
+AC_DEFINE([GNULIB_EXCLUDE_SINGLE_THREAD], [1],
+  [Define to 1 if apps call 'exclude' functions from a single thread.])
+AC_DEFINE([GNULIB_REGEX_SINGLE_THREAD], [1],
+  [Define to 1 if apps call 'regex' functions from a single thread.])
+# This is unsafe, since 'sort' uses mbrtowc indirectly, possibly from
+# multiple threads.
+# AC_DEFINE([GNULIB_MBRTOWC_SINGLE_THREAD], [1],
+#   [Define to 1 if apps call mbrtowc, mbrtoc32, and 'regex' functions
+#    from a single thread.])
+# This is safe, since all apps set locale early.
+AC_DEFINE([GNULIB_WCHAR_SINGLE_LOCALE], [1],
+  [Define to 1 if apps don't set the locale after calling
+   locale-sensitive functions like mbrtowc and wcwidth.])
+
 # The test suite needs to know if we have a working perl.
 AM_CONDITIONAL([HAVE_PERL], [test "$gl_cv_prog_perl" != no])