2004-12-17 02:25:52 +00:00
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# See if we have working TLS. We only check to see if it compiles, and that
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# the resulting program actually runs, not whether the resulting TLS variables
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# work properly; that check is done at runtime, since we can run binaries
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# compiled with __thread on systems without TLS.
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2005-01-17 17:51:18 +00:00
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AC_DEFUN([SM_TLS],
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2004-09-09 02:24:52 +00:00
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[
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AC_MSG_CHECKING(for TLS)
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2007-03-13 10:20:57 +00:00
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AC_RUN_IFELSE([AC_LANG_SOURCE([[ static __thread int val; int main() { return 0; } ]])],[have_tls=yes],[have_tls=no],[have_tls=no ])
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2004-09-09 02:24:52 +00:00
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AC_MSG_RESULT($have_tls)
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if test "$have_tls" = "yes"; then
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2004-12-17 02:25:52 +00:00
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AC_DEFINE([HAVE_TLS],[1],[Define if the compiler supports __thread])
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2004-09-09 02:24:52 +00:00
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AC_DEFINE([thread_local],[__thread],[Define to the compiler TLS keyword])
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fi
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])
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