[rtems commit] m68k/csb360: Add per-section compilation and linking support.

[Joel Sherrill]

Module:    rtems
Branch:    master
Commit:    8d8d5b4896d256e73e07a65602db988d2cb1db80
Changeset: http://git.rtems.org/rtems/commit/?id=8d8d5b4896d256e73e07a65602db988d2cb1db80

Author:    Ralph Holmes <ralph at ybden.com>
Date:      Sat Jan 23 02:07:34 2016 +0000

m68k/csb360: Add per-section compilation and linking support.

The size of the sample executables without this option were:

   text    data     bss     dec     hex filename
  87040    1728    7824   96592   17950 base_sp.exe
  96176    1696    7424  105296   19b50 hello.exe
  30672    1280    3888   35840    8c00 minimum.exe
 559904    5632   19312  584848   8ec90 fileio.exe
 106144    1808    7936  115888   1c4b0 nsecs.exe
 180688    2096    8416  191200   2eae0 paranoia.exe
  90784    1728    7856  100368   18810 ticker.exe
  89248    1760   11264  102272   18f80 unlimited.exe
 835456   21520   14896  871872   d4dc0 cxx_iostream.exe
 186336    2144    7968  196448   2ff60 cdtest.exe
 180544    2224    9648  192416   2efa0 capture.exe

The size of the sample executables with this option enabled were:

   text	   data	    bss	    dec	    hex	filename
  78496	   1648	   7760	  87904	  15760	base_sp.exe
  86560	   1600	   7344	  95504	  17510	hello.exe
  23360	   1184	   3840	  28384	   6ee0	minimum.exe
 542624	   5568	  18976	 567168	  8a780	fileio.exe
  98752	   1744	   7872	 108368	  1a750	nsecs.exe
 171792	   2032	   8368	 182192	  2c7b0	paranoia.exe
  83040	   1648	   7792	  92480	  16940	ticker.exe
  79984	   1664	  11184	  92832	  16aa0	unlimited.exe
 162128	   2112	   7616	 171856	  29f50	cxx_iostream.exe
 169856	   2048	   7888	 179792	  2be50	cdtest.exe
 169904	   2128	   9584	 181616	  2c570	capture.exe

---

 c/src/lib/libbsp/m68k/csb360/make/custom/csb360.cfg | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/c/src/lib/libbsp/m68k/csb360/make/custom/csb360.cfg b/c/src/lib/libbsp/m68k/csb360/make/custom/csb360.cfg
index dc8988d..0d00237 100644
--- a/c/src/lib/libbsp/m68k/csb360/make/custom/csb360.cfg
+++ b/c/src/lib/libbsp/m68k/csb360/make/custom/csb360.cfg
@@ -15,3 +15,6 @@ CPU_CFLAGS = -mcpu=5272
 
 # optimize flag: typically -O2
 CFLAGS_OPTIMIZE_V = -O2 -g -fomit-frame-pointer
+CFLAGS_OPTIMIZE_V += -ffunction-sections -fdata-sections
+
+LDFLAGS = -Wl,--gc-sections