# See if we have working TLS. We only check to see if it compiles, and that

# the resulting program actually runs, not whether the resulting TLS variables

# work properly; that check is done at runtime, since we can run binaries

# compiled with __thread on systems without TLS.

AC_DEFUN([LXC_CHECK_TLS],

[

AC_MSG_CHECKING(for TLS)

AC_RUN_IFELSE([AC_LANG_SOURCE([[ static __thread int val; int main() { return 0; } ]])],[have_tls=yes],[have_tls=no],[have_tls=no ])

AC_MSG_RESULT($have_tls)

if test "$have_tls" = "yes"; then

AC_DEFINE([HAVE_TLS],[1],[Define if the compiler supports __thread])

AC_DEFINE([thread_local],[__thread],[Define to the compiler TLS keyword])

fi

])