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AC_DEFUN([AC_DEF_HOTSPOT_ATTR],
[
AC_REQUIRE([AC_PROG_CC])
AC_MSG_CHECKING([for hot spot attribute])
HOTATTR=""
save_CFLAGS=$CFLAGS
CFLAGS=-Werror
AC_TRY_COMPILE(
[int dummyfunc (void) __attribute__ ((hot));],
[],
gl_cv_cc_hotspot=yes,
gl_cv_cc_hotspot=no)
if test $gl_cv_cc_hotspot = yes; then
HOTATTR="__attribute__ ((hot))"
fi
CFLAGS=$save_CFLAGS
AC_MSG_RESULT([$gl_cv_cc_hotspot])
AC_DEFINE_UNQUOTED([HOTSPOT], [$HOTATTR],
[Define to the supported attribute to specify a hot spot])
])
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