-dnl AC_ARG_ENABLE([__thread], [AS_HELP_STRING(--enable-__thread,use TLS features)], [use__thread=$enableval], [use__thread=no])
-dnl
-dnl dnl Check whether the compiler supports the __thread keyword.
-dnl if test "x$use__thread" != xno; then
-dnl AC_CACHE_CHECK([for __thread], ac_cv_gcc___thread,
-dnl [cat > conftest.c <<\EOF
-dnl __thread int a = 42;
-dnl EOF
-dnl if AC_TRY_COMMAND([${CC-cc} $ARCH_CFLAGS $OPT_CFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
-dnl ac_cv_gcc___thread=yes
-dnl else
-dnl ac_cv_gcc___thread=no
-dnl fi
-dnl rm -f conftest*])
-dnl if test "$ac_cv_gcc___thread" = yes; then
-dnl AC_DEFINE([HAVE___THREAD], 1, [have __thread])
-dnl fi
-dnl else
-dnl ac_cv_gcc___thread=no
-dnl fi
+dnl Check whether the compiler supports the __thread keyword.
+if test "x$use__thread" != xno; then
+ AC_CACHE_CHECK([for __thread], ac_cv_gcc___thread,
+ [cat > conftest.c <<\EOF
+__thread int a = 42;
+EOF
+ if AC_TRY_COMMAND([${CC-cc} $ARCH_CFLAGS $OPT_CFLAGS -c conftest.c >&AS_MESSAGE_LOG_FD]); then
+ ac_cv_gcc___thread=yes
+ else
+ ac_cv_gcc___thread=no
+ fi
+ rm -f conftest*])
+ if test "$ac_cv_gcc___thread" = yes; then
+ AC_DEFINE([HAVE___THREAD], 1, [have __thread])
+ fi
+else
+ ac_cv_gcc___thread=no
+fi
+])