[rtems commit] m68k/uC5282: Add per-section compilation and linking support.

[Joel Sherrill]

Module:    rtems
Branch:    master
Commit:    7e21264349ee97698d19399a482512d3359c185c
Changeset: http://git.rtems.org/rtems/commit/?id=7e21264349ee97698d19399a482512d3359c185c

Author:    Ralph Holmes <ralph at ybden.com>
Date:      Sat Jan 23 02:07:35 2016 +0000

m68k/uC5282: Add per-section compilation and linking support.

The size of the sample executables without this option were:

   text    data     bss     dec     hex filename
 148368    1680   11616  161664   27780 base_sp.exe
 137952    1648   11616  151216   24eb0 hello.exe
 129472    1568    7968  139008   21f00 minimum.exe
 582896    5584   23088  611568   954f0 fileio.exe
 162080    1760   11712  175552   2adc0 nsecs.exe
 223104    2048   12208  237360   39f30 paranoia.exe
 152112    1680   11632  165424   28630 ticker.exe
 152016    1712   15456  169184   294e0 unlimited.exe
 892672   21936   18720  933328   e3dd0 cxx_iostream.exe
 223904    2272   11792  237968   3a190 cdtest.exe
 202832    2176   13424  218432   35540 capture.exe

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

   text	   data	    bss	    dec	    hex	filename
 122368	   1648	   9488	 133504	  20980	base_sp.exe
 108576	   1600	   9024	 119200	  1d1a0	hello.exe
  82032	   1328	   3904	  87264	  154e0	minimum.exe
 562800	   5568	  20704	 589072	  8fd10	fileio.exe
 141696	   1744	   9600	 153040	  255d0	nsecs.exe
 196544	   2032	  10080	 208656	  32f10	paranoia.exe
 126256	   1648	   9520	 137424	  218d0	ticker.exe
 122960	   1664	  12864	 137488	  21910	unlimited.exe
 203024	   2208	   9328	 214560	  34620	cxx_iostream.exe
 205616	   2144	   9648	 217408	  35140	cdtest.exe
 190576	   2128	  11312	 204016	  31cf0	capture.exe

---

 c/src/lib/libbsp/m68k/uC5282/make/custom/uC5282.cfg | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/c/src/lib/libbsp/m68k/uC5282/make/custom/uC5282.cfg b/c/src/lib/libbsp/m68k/uC5282/make/custom/uC5282.cfg
index 3c62a17..c94e236 100644
--- a/c/src/lib/libbsp/m68k/uC5282/make/custom/uC5282.cfg
+++ b/c/src/lib/libbsp/m68k/uC5282/make/custom/uC5282.cfg
@@ -13,6 +13,9 @@ CPU_CFLAGS = -mcpu=5282
 
 # optimize flag: typically -O2
 CFLAGS_OPTIMIZE_V = -O2 -g
+CFLAGS_OPTIMIZE_V += -ffunction-sections -fdata-sections
+
+LDFLAGS = -Wl,--gc-sections
 
 define bsp-post-link
 	$(default-bsp-post-link)