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  • Committer: Monty Taylor
  • Date: 2010-11-23 18:04:36 UTC
  • mto: (1953.1.2 build)
  • mto: This revision was merged to the branch mainline in revision 1950.
  • Revision ID: mordred@inaugust.com-20101123180436-3guk4vioaj2c37wk
https://launchpad.net/bugs/675395
A warning was masking the ability to use PAUSE.

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plugin/innobase/plugin.ac
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  # http://bugs.opensolaris.org/bugdatabase/printableBug.do?bug_id=6478684
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  # We use ib_ prefix to avoid collisoins if this code is added to
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  # mysql's configure.in.
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  dnl Must be done once we turn on warnings and such
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  save_CFLAGS="${CFLAGS}"
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  CFLAGS="${AM_CFLAGS} ${CFLAGS}"
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  AC_RUN_IFELSE([AC_LANG_PROGRAM([[]],[[
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        __asm__ __volatile__ ("pause");
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    ]])],[
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      ac_cv_plugin_innodb_has_pause=no
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    ])
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  ])
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  CFLAGS="${save_CFLAGS}"
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  AS_IF([test "${ac_cv_plugin_innodb_has_pause}" = "yes"],[
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    AC_DEFINE([IB_HAVE_PAUSE_INSTRUCTION], [1],
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              [Does x86 PAUSE instruction exist])