gl_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER uses $LIBMULTITHREAD.
For this, it needs to require gl_THREADLIB, not gl_THREADLIB_EARLY.
Otherwise, we could have wrong configuration results.
2023-10-15 Bruno Haible <br...@clisp.org>
lock: Make Autoconf macro more robust.
* m4/pthread_rwlock_rdlock.m4 (gl_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER):
Require gl_THREADLIB, not gl_THREADLIB_EARLY. Needed to get the value of
LIBMULTITHREAD.
diff --git a/m4/pthread_rwlock_rdlock.m4 b/m4/pthread_rwlock_rdlock.m4
index 7cc650c49d..1fdc532ae8 100644
--- a/m4/pthread_rwlock_rdlock.m4
+++ b/m4/pthread_rwlock_rdlock.m4
@@ -1,4 +1,4 @@
-# pthread_rwlock_rdlock.m4 serial 6
+# pthread_rwlock_rdlock.m4 serial 7
dnl Copyright (C) 2017-2023 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -34,7 +34,7 @@
dnl https://bugzilla.redhat.com/show_bug.cgi?id=1410052
AC_DEFUN([gl_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER],
[
- AC_REQUIRE([gl_THREADLIB_EARLY])
+ AC_REQUIRE([gl_THREADLIB])
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
AC_CACHE_CHECK([whether pthread_rwlock_rdlock prefers a writer to a reader],
[gl_cv_pthread_rwlock_rdlock_prefer_writer],
