diff --git a/configure.ac b/configure.ac index a3ba8ce8085..302fc639d10 100644 --- a/configure.ac +++ b/configure.ac @@ -827,8 +827,23 @@ AC_LINK_IFELSE([AC_LANG_SOURCE([ } ])], [ - AC_DEFINE(HAVE_THREAD_LOCAL,1,[Define if thread_local is supported.]) - AC_MSG_RESULT(yes) + case $host in + *mingw*) + # mingw32's implementation of thread_local has also been shown to behave + # erroneously under concurrent usage; see: + # https://gist.github.com/jamesob/fe9a872051a88b2025b1aa37bfa98605 + AC_MSG_RESULT(no) + ;; + *darwin*) + # TODO enable thread_local on later versions of Darwin where it is + # supported (per https://stackoverflow.com/a/29929949) + AC_MSG_RESULT(no) + ;; + *) + AC_DEFINE(HAVE_THREAD_LOCAL,1,[Define if thread_local is supported.]) + AC_MSG_RESULT(yes) + ;; + esac ], [ AC_MSG_RESULT(no)