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Merge branch 'disable-tls'

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This commit is contained in:
Jason Evans 2010-01-17 15:51:35 -08:00
commit 3363a841ca
2 changed files with 53 additions and 34 deletions
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6
jemalloc/INSTALL
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@ -89,6 +89,12 @@ any of the following arguments (not a definitive list) to 'configure':
practice, this feature usually has little impact on performance unless
thread-specific caching is disabled.
--disable-tls
Disable thread-local storage (TLS), which allows for fast access to
thread-local variables via the __thread keyword. If TLS is available,
jemalloc uses it for several purposes. Not that disabling TLS implies
--disable-tcache.
The following environment variables (not a definitive list) impact configure's
behavior:

81
jemalloc/configure.ac
View File

@ -223,7 +223,7 @@ AC_SUBST([RPATH_EXTRA])
dnl Disable rules that do automatic regeneration of configure output by default.
AC_ARG_ENABLE([autogen],
[AS_HELP_STRING[--enable-autogen], [Automatically regenerate configure output])],
[AS_HELP_STRING([--enable-autogen], [Automatically regenerate configure output])],
if test "x$enable_autogen" = "xno" ; then
enable_autogen="0"
else
@ -548,39 +548,6 @@ AC_CHECK_LIB([pthread], [pthread_create], [LIBS="$LIBS -lpthread"],
CPPFLAGS="$CPPFLAGS -D_REENTRANT"
AC_MSG_CHECKING([for TLS])
AC_RUN_IFELSE([AC_LANG_PROGRAM(
[[
__thread int x;
]], [[
x = 42;
return 0;
]])],
AC_MSG_RESULT([yes])
have_tls="1",
AC_MSG_RESULT([no])
have_tls="0"
AC_DEFINE_UNQUOTED([NO_TLS], [ ]))
dnl Finish tcache-related definitions, now that TLS configuration is done.
if test "x$have_tls" = "x0" ; then
enable_tcache="0"
fi
if test "x$enable_tcache" = "x1" ; then
AC_DEFINE([JEMALLOC_TCACHE], [ ])
fi
AC_SUBST([enable_tcache])
if test "x$enable_tcache" = "x0" ; then
roff_tcache=".\\\" "
roff_no_tcache=""
else
roff_tcache=""
roff_no_tcache=".\\\" "
fi
AC_SUBST([roff_tcache])
AC_SUBST([roff_no_tcache])
dnl Enable lazy locking by default.
AC_ARG_ENABLE([lazy_lock],
[AS_HELP_STRING([--disable-lazy-lock],
@ -601,6 +568,52 @@ if test "x$enable_lazy_lock" = "x1" ; then
fi
AC_SUBST([enable_lazy_lock])
AC_ARG_ENABLE([tls],
[AS_HELP_STRING([--disable-tls], [Disable thread-local storage (__thread keyword)])],
if test "x$enable_tls" = "xno" ; then
enable_tls="0"
else
enable_tls="1"
fi
,
enable_tls="1"
)
if test "x${enable_tls}" = "x1" ; then
AC_MSG_CHECKING([for TLS])
AC_RUN_IFELSE([AC_LANG_PROGRAM(
[[
__thread int x;
]], [[
x = 42;
return 0;
]])],
AC_MSG_RESULT([yes]),
AC_MSG_RESULT([no])
enable_tls="0")
fi
if test "x${enable_tls}" = "x0" ; then
AC_DEFINE_UNQUOTED([NO_TLS], [ ])
fi
dnl Finish tcache-related definitions, now that TLS configuration is done.
if test "x$enable_tls" = "x0" ; then
enable_tcache="0"
fi
if test "x$enable_tcache" = "x1" ; then
AC_DEFINE([JEMALLOC_TCACHE], [ ])
fi
AC_SUBST([enable_tcache])
if test "x$enable_tcache" = "x0" ; then
roff_tcache=".\\\" "
roff_no_tcache=""
else
roff_tcache=""
roff_no_tcache=".\\\" "
fi
AC_SUBST([roff_tcache])
AC_SUBST([roff_no_tcache])
dnl ============================================================================
dnl Configure libgd for mtrgraph.
bins="${objroot}bin/jemtr2mtr${install_suffix}"