17 lines
496 B
Text
17 lines
496 B
Text
AC_DEFUN([CC_CHECK_TLS], [
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AC_CACHE_CHECK([whether $CC knows __thread for Thread-Local Storage],
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cc_cv_tls___thread,
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[AC_COMPILE_IFELSE(
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AC_LANG_PROGRAM(
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[[static __thread int a = 6;]],
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[[a = 5;]]),
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[cc_cv_tls___thread=yes],
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[cc_cv_tls___thread=no])
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])
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AS_IF([test "x$cc_cv_tls___thread" = "xyes"],
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[AC_DEFINE([SUPPORT_TLS___THREAD], 1,
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[Define this if the compiler supports __thread for Thread-Local Storage])
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$1],
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[$2])
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])
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