[rtems-source-builder commit] rtems-bsb: Use linker garbage collection for BSP based builds

[Chris Johns]

Module:    rtems-source-builder
Branch:    master
Commit:    13e4dfd3d279693ae7a3a56a00a7b0d88cd26bd1
Changeset: http://git.rtems.org/rtems-source-builder/commit/?id=13e4dfd3d279693ae7a3a56a00a7b0d88cd26bd1

Author:    Chris Johns <chrisj at rtems.org>
Date:      Tue Apr 28 18:34:08 2020 +1000

rtems-bsb: Use linker garbage collection for BSP based builds

Close #3944.

---

 rtems/config/rtems-bsp.cfg | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/rtems/config/rtems-bsp.cfg b/rtems/config/rtems-bsp.cfg
index d50615e..801cd5c 100644
--- a/rtems/config/rtems-bsp.cfg
+++ b/rtems/config/rtems-bsp.cfg
@@ -228,10 +228,19 @@
 %endif
 
 #
+# Define any extra flags we may need.
+#
+%define rtems_bsp_ldflags_extra \
+          %{?rtems_bsp_ldflags_extra: %{rtems_bsp_ldflags_extra}} \
+          -Wl,--gc-sections
+
+#
 # The linker flags need to include the machine options for the BSP.
 #
 %define mflags_filter  awk '{for (i=1;i<NF;++i) if ($i ~ /\-m/) printf("%s ",$i);}'
-%define rtems_bsp_ldflags %{rtems_bsp_ldflags} $(echo "%{rtems_bsp_cflags}" | %{mflags_filter})
+%define rtems_bsp_ldflags %{rtems_bsp_ldflags} \
+                          $(echo "%{rtems_bsp_cflags}" | %{mflags_filter}) \
+			  %{rtems_bsp_ldflags_extra}
 
 #
 # Map to names used for cross compiling.