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build: Enable thread_local for MinGW-w64 builds

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The assumption in the commit 188ca75e5f
about the broken `thread_local` implementation in GCC was misguided
because the initial failure was not due to GCC, but a bug in the Wine
runtime, as evidenced, for example, here:
 - https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=917307
 - https://bugs.freedesktop.org/show_bug.cgi?id=108662

Consequently, it is safe to re-enable `thread_local` support for
MinGW-w64 builds.
This commit is contained in:
Hennadii Stepanov 2024-05-14 17:04:37 +01:00 • committed by fanquake
parent a786fd2041
commit 5bba43312c
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1 changed files with 0 additions and 6 deletions
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6
configure.ac
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@ -1043,12 +1043,6 @@ if test "$use_thread_local" = "yes" || test "$use_thread_local" = "auto"; then
])],
[
case $host in
*mingw*)
dnl mingw32's implementation of thread_local has also been shown to behave
dnl erroneously under concurrent usage; see:
dnl https://gist.github.com/jamesob/fe9a872051a88b2025b1aa37bfa98605
AC_MSG_RESULT([no])
;;
*)
AC_DEFINE([HAVE_THREAD_LOCAL], [1], [Define if thread_local is supported.])
AC_MSG_RESULT([yes])