[rtems commit] m68k/mcf5329: Add per-section compilation and linking support.

[Joel Sherrill]

Module:    rtems
Branch:    master
Commit:    516dab50ec17e2a27c61d2113318dfdff2bcd7c8
Changeset: http://git.rtems.org/rtems/commit/?id=516dab50ec17e2a27c61d2113318dfdff2bcd7c8

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

m68k/mcf5329: Add per-section compilation and linking support.

The size of the sample executables without this option were:

   text    data     bss     dec     hex filename
  96854    1680   10554  109088   1aa20 base_sp.exe
 110310    1648   10106  122064   1dcd0 hello.exe
  34438    1232    4922   40592    9e90 minimum.exe
 574374    5584   22042  602000   92f90 fileio.exe
 115542    1760   10666  127968   1f3e0 nsecs.exe
 196470    2048   11162  209680   33310 paranoia.exe
 100582    1680   10586  112848   1b8d0 ticker.exe
  98598    1712   13946  114256   1be50 unlimited.exe
 868902   21952   17610  908464   ddcb0 cxx_iostream.exe
 204726    2272   10730  217728   35280 cdtest.exe
 198278    2176   12378  212832   33f60 capture.exe

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

   text	   data	    bss	    dec	    hex	filename
  88646	   1648	  10506	 100800	  189c0	base_sp.exe
 100502	   1600	  10042	 112144	  1b610	hello.exe
  25302	   1184	   4874	  31360	   7a80	minimum.exe
 556838	   5568	  21722	 584128	  8e9c0	fileio.exe
 107830	   1744	  10602	 120176	  1d570	nsecs.exe
 187926	   2032	  11098	 201056	  31160	paranoia.exe
  92534	   1648	  10522	 104704	  19900	ticker.exe
  89014	   1664	  13882	 104560	  19870	unlimited.exe
 179254	   2192	  10330	 191776	  2ed20	cxx_iostream.exe
 188294	   2144	  10650	 201088	  31180	cdtest.exe
 188070	   2128	  12330	 202528	  31720	capture.exe

---

 c/src/lib/libbsp/m68k/mcf5329/make/custom/mcf5329.cfg | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/c/src/lib/libbsp/m68k/mcf5329/make/custom/mcf5329.cfg b/c/src/lib/libbsp/m68k/mcf5329/make/custom/mcf5329.cfg
index e1f5734..f742152 100644
--- a/c/src/lib/libbsp/m68k/mcf5329/make/custom/mcf5329.cfg
+++ b/c/src/lib/libbsp/m68k/mcf5329/make/custom/mcf5329.cfg
@@ -15,6 +15,9 @@ CPU_CFLAGS = -mcpu=5307
 
 # optimize flag: typically -O2
 CFLAGS_OPTIMIZE_V = -O2 -g -fomit-frame-pointer
+CFLAGS_OPTIMIZE_V += -ffunction-sections -fdata-sections
+
+LDFLAGS = -Wl,--gc-sections
 
 # This defines the operations performed on the linked executable.
 # is currently required.