[rtems commit] m68k/mrm332: Add per-section compilation and linking support (GCI 2018)

[Joel Sherrill]

Module:    rtems
Branch:    master
Commit:    8b28fddf477b36d312054a8c4c2814077e1ff1af
Changeset: http://git.rtems.org/rtems/commit/?id=8b28fddf477b36d312054a8c4c2814077e1ff1af

Author:    Shashvat Jain <shashvatjain2002 at gmail.com>
Date:      Thu Nov 29 15:39:47 2018 -0500

m68k/mrm332: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
 172384	   2096	  14512	 188992	  2e240	./capture.exe
  70848	   1136	  11568	  83552	  14660	./base_sp.exe
 101728	   1504	  11728	 114960	  1c110	./hello.exe
 217744	   6016	  18336	 242096	  3b1b0	./loopback.exe
  57968	   1008	   8416	  67392	  10740	./minimum.exe
  93952	   1616	  11696	 107264	  1a300	./nsecs.exe
 166272	   1904	  12304	 180480	  2c100	./paranoia.exe
 358240	  12032	  41136	 411408	  64710	./pppd.exe
  73104	   1168	  11600	  85872	  14f70	./ticker.exe
  73264	   1120	  15472	  89856	  15f00	./unlimited.exe

The size of the sample executables with this option were:

   text	   data	    bss	    dec	    hex	filename
 158976	   2096	  14464	 175536	  2adb0	./capture.exe
  66304	   1136	  11488	  78928	  13450	./base_sp.exe
  92912	   1504	  11680	 106096	  19e70	./hello.exe
 202240	   6000	  18272	 226512	  374d0	./loopback.exe
  53296	    992	   8336	  62624	   f4a0	./minimum.exe
  88032	   1616	  11600	 101248	  18b80	./nsecs.exe
 157760	   1888	  12272	 171920	  29f90	./paranoia.exe
 346080	  12032	  41056	 399168	  61740	./pppd.exe
  68304	   1168	  11520	  80992	  13c60	./ticker.exe
  71312	   1104	  15440	  87856	  15730	./unlimited.exe

Closes #2567

---

 bsps/m68k/mrm332/config/mrm332.cfg | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/bsps/m68k/mrm332/config/mrm332.cfg b/bsps/m68k/mrm332/config/mrm332.cfg
index 7df1c18..5391f66 100644
--- a/bsps/m68k/mrm332/config/mrm332.cfg
+++ b/bsps/m68k/mrm332/config/mrm332.cfg
@@ -13,7 +13,6 @@ CPU_CFLAGS = -mcpu=cpu32
 # using optimise for size due to small memory on target board.
 CFLAGS_OPTIMIZE_V = -Os -g -fomit-frame-pointer
 
-# FIXME: Disabled because linkcmds lacks proper KEEP() directives. See #2567.
 # 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