Add the --disable-tls configure option.
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@ -89,6 +89,12 @@ any of the following arguments (not a definitive list) to 'configure':
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practice, this feature usually has little impact on performance unless
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thread-specific caching is disabled.
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--disable-tls
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Disable thread-local storage (TLS), which allows for fast access to
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thread-local variables via the __thread keyword. If TLS is available,
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jemalloc uses it for several purposes. Not that disabling TLS implies
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--disable-tcache.
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The following environment variables (not a definitive list) impact configure's
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behavior:
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@ -223,7 +223,7 @@ AC_SUBST([RPATH_EXTRA])
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dnl Disable rules that do automatic regeneration of configure output by default.
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AC_ARG_ENABLE([autogen],
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[AS_HELP_STRING[--enable-autogen], [Automatically regenerate configure output])],
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[AS_HELP_STRING([--enable-autogen], [Automatically regenerate configure output])],
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if test "x$enable_autogen" = "xno" ; then
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enable_autogen="0"
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else
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@ -548,39 +548,6 @@ AC_CHECK_LIB([pthread], [pthread_create], [LIBS="$LIBS -lpthread"],
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CPPFLAGS="$CPPFLAGS -D_REENTRANT"
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AC_MSG_CHECKING([for TLS])
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AC_RUN_IFELSE([AC_LANG_PROGRAM(
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[[
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__thread int x;
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]], [[
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x = 42;
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return 0;
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]])],
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AC_MSG_RESULT([yes])
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have_tls="1",
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AC_MSG_RESULT([no])
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have_tls="0"
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AC_DEFINE_UNQUOTED([NO_TLS], [ ]))
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dnl Finish tcache-related definitions, now that TLS configuration is done.
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if test "x$have_tls" = "x0" ; then
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enable_tcache="0"
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fi
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if test "x$enable_tcache" = "x1" ; then
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AC_DEFINE([JEMALLOC_TCACHE], [ ])
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fi
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AC_SUBST([enable_tcache])
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if test "x$enable_tcache" = "x0" ; then
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roff_tcache=".\\\" "
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roff_no_tcache=""
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else
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roff_tcache=""
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roff_no_tcache=".\\\" "
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fi
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AC_SUBST([roff_tcache])
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AC_SUBST([roff_no_tcache])
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dnl Enable lazy locking by default.
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AC_ARG_ENABLE([lazy_lock],
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[AS_HELP_STRING([--disable-lazy-lock],
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@ -601,6 +568,52 @@ if test "x$enable_lazy_lock" = "x1" ; then
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fi
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AC_SUBST([enable_lazy_lock])
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AC_ARG_ENABLE([tls],
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[AS_HELP_STRING([--disable-tls], [Disable thread-local storage (__thread keyword)])],
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if test "x$enable_tls" = "xno" ; then
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enable_tls="0"
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else
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enable_tls="1"
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fi
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,
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enable_tls="1"
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)
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if test "x${enable_tls}" = "x1" ; then
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AC_MSG_CHECKING([for TLS])
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AC_RUN_IFELSE([AC_LANG_PROGRAM(
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[[
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__thread int x;
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]], [[
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x = 42;
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return 0;
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]])],
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AC_MSG_RESULT([yes]),
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AC_MSG_RESULT([no])
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enable_tls="0")
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fi
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if test "x${enable_tls}" = "x0" ; then
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AC_DEFINE_UNQUOTED([NO_TLS], [ ])
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fi
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dnl Finish tcache-related definitions, now that TLS configuration is done.
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if test "x$enable_tls" = "x0" ; then
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enable_tcache="0"
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fi
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if test "x$enable_tcache" = "x1" ; then
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AC_DEFINE([JEMALLOC_TCACHE], [ ])
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fi
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AC_SUBST([enable_tcache])
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if test "x$enable_tcache" = "x0" ; then
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roff_tcache=".\\\" "
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roff_no_tcache=""
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else
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roff_tcache=""
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roff_no_tcache=".\\\" "
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fi
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AC_SUBST([roff_tcache])
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AC_SUBST([roff_no_tcache])
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dnl ============================================================================
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dnl Configure libgd for mtrgraph.
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bins="${objroot}bin/jemtr2mtr${install_suffix}"
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