[rtems commit] powerpc/ss555: Add per-section compilation and linking support(GCI 2018)

[Joel Sherrill]

Module:    rtems
Branch:    master
Commit:    8b6273a843c0e105d4b8aa77c48c8eb3290ef5f2
Changeset: http://git.rtems.org/rtems/commit/?id=8b6273a843c0e105d4b8aa77c48c8eb3290ef5f2

Author:    Shashvat Jain <shashvatjain2002 at gmail.com>
Date:      Fri Nov 30 10:03:25 2018 -0500

powerpc/ss555:Add per-section compilation and linking support(GCI 2018)

The size of the sample executables without this option were:

   text	   data	    bss	    dec	    hex	filename
 116512	   1340	  15400	 133252	  20884	./base_sp.exe
 246172	   2328	  18324	 266824	  41248	./capture.exe
 319368	   3520	  16496	 339384	  52db8	./cdtest.exe
1077464	  22428	  23284	1123176	 112368	./cxx_iostream.exe
 640632	   4916	  28408	 673956	  a48a4	./fileio.exe
 148844	   1692	  15572	 166108	  288dc	./hello.exe
 328648	   6252	  22408	 357308	  573bc	./loopback.exe
  95828	   1196	  12224	 109248	  1aac0	./minimum.exe
 145576	   1872	  15528	 162976	  27ca0	./nsecs.exe
 194932	   2100	  16172	 213204	  340d4	./paranoia.exe
 537060	  12460	  45124	 594644	  912d4	./pppd.exe
 119620	   1380	  15464	 136464	  21510	./ticker.exe
 119388	   1324	  19300	 140012	  222ec	./unlimited.exe

The size of the sample executables with this option were:

   text	   data	    bss	    dec	    hex	filename
 235000	   2336	  16628	 253964	  3e00c	./cxx_iostream.exe
 627252	   4892	  28108	 660252	  a131c	./fileio.exe
 137648	   1676	  15528	 154852	  25ce4	./hello.exe
 308616	   6236	  22336	 337188	  52524	./loopback.exe
  89564	   1180	  12144	 102888	  191e8	./minimum.exe
 137184	   1856	  15432	 154472	  25b68	./nsecs.exe
 184264	   2084	  16144	 202492	  316fc	./paranoia.exe
 520768	  12440	  45020	 578228	  8d2b4	./pppd.exe
 113260	   1364	  15356	 129980	  1fbbc	./ticker.exe
 117236	   1308	  19272	 137816	  21a58	./unlimited.exe
 110584	   1324	  15308	 127216	  1f0f0	./base_sp.exe
 229172	   2316	  18288	 249776	  3cfb0	./capture.exe
 233980	   2320	  16436	 252736	  3db40	./cdtest.exe

Closes #2563

---

 bsps/powerpc/ss555/config/ss555.cfg | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/bsps/powerpc/ss555/config/ss555.cfg b/bsps/powerpc/ss555/config/ss555.cfg
index 7054eaa..f4c6ca2 100644
--- a/bsps/powerpc/ss555/config/ss555.cfg
+++ b/bsps/powerpc/ss555/config/ss555.cfg
@@ -19,10 +19,9 @@ CPU_CFLAGS = -mcpu=505
 # optimize flag: typically -O2
 CFLAGS_OPTIMIZE_V = -O2 -g -fno-keep-inline-functions
 
-# FIXME: Disabled because linkcmds lacks proper KEEP() directives. See #2563.
 # The following two lines enable compiling and linking on per element.
-# CFLAGS_OPTIMIZE_V += -ffunction-sections -fdata-sections
-# LDFLAGS = -Wl,--gc-sections
+CFLAGS_OPTIMIZE_V += -ffunction-sections -fdata-sections
+LDFLAGS = -Wl,--gc-sections
 
 define bsp-post-link
 	$(default-bsp-post-link)