timestamp: fix incremental linking error for !HAVE_MONOTONIC_TIMER
In linking ramstage a single object file is created before linking
with the linker script. Though there is a weak timestamp_get() symbol
in timestamp.c any of its dependent symbols need to be available
during the incremental link. As not all platforms have
HAVE_MONOTONIC_TIMER enabled this will create a linking error.
Fix this by providing a hint to the compiler to remove dead code
and thus the dependent symbols causing linking errors in the presence
of !HAVE_MONOTONIC_TIMER.
Change-Id: Ib8a5dca2c12c2edac7605f403ed91b793823c8a3
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/10138
Tested-by: build bot (Jenkins)
Reviewed-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
diff --git a/src/lib/timestamp.c b/src/lib/timestamp.c
index 0c9c884..4b5f4d4 100644
--- a/src/lib/timestamp.c
+++ b/src/lib/timestamp.c
@@ -180,6 +180,9 @@
{
struct mono_time t1, t2;
+ if (!IS_ENABLED(CONFIG_HAVE_MONOTONIC_TIMER))
+ return 0;
+
mono_time_set_usecs(&t1, 0);
timer_monotonic_get(&t2);