[rtems commit] mips/malta: Add per-section compilation and linking support.

[Joel Sherrill]

Module:    rtems
Branch:    master
Commit:    82d2ec4bf4e7523218dfc2a800275965e7f256c0
Changeset: http://git.rtems.org/rtems/commit/?id=82d2ec4bf4e7523218dfc2a800275965e7f256c0

Author:    Ralph Holmes <ralph at ybden.com>
Date:      Tue Jan 19 20:59:29 2016 +0000

mips/malta: Add per-section compilation and linking support.

The size of the sample executables without this option were:

   text	   data	    bss	    dec	    hex	filename
 276796	   2076	  16544	 295416	  481f8	base_sp.exe
 272996	   2044	  16080	 291120	  47130	hello.exe
 210632	   1828	  12800	 225260	  36fec	minimum.exe
1102500	   6380	  28968	1137848	 115cb8	fileio.exe
 303952	   2204	  16648	 322804	  4ecf4	nsecs.exe
 361424	   2508	  17168	 381100	  5d0ac	paranoia.exe
 284876	   2076	  16592	 303544	  4a1b8	ticker.exe
 282988	   2108	  19984	 305080	  4a7b8	unlimited.exe
1308448	   2436	  24016	1334900	 145e74	cxx_iostream.exe
 407228	   2140	  16928	 426296	  68138	cdtest.exe
 431492	   2748	  18420	 452660	  6e834	capture.exe

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

   text	   data	    bss	    dec	    hex	filename
 244480	   1968	  16384	 262832	  402b0	base_sp.exe
 237488	   1908	  15952	 255348	  3e574	hello.exe
 126448	   1480	  12656	 140584	  22528	minimum.exe
1052392	   6112	  28328	1086832	 109570	fileio.exe
 274708	   2088	  16504	 293300	  479b4	nsecs.exe
 329108	   2384	  17040	 348532	  55174	paranoia.exe
 254748	   1968	  16416	 273132	  42aec	ticker.exe
 248112	   1984	  19776	 269872	  41e30	unlimited.exe
 753136	   2300	  22976	 778412	  be0ac	cxx_iostream.exe
 371596	   2032	  16752	 390380	  5f4ec	cdtest.exe
 392480	   2572	  18244	 413296	  64e70	capture.exe

---

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

diff --git a/c/src/lib/libbsp/mips/malta/make/custom/malta.cfg b/c/src/lib/libbsp/mips/malta/make/custom/malta.cfg
index f44b5e9..2bd1eab 100644
--- a/c/src/lib/libbsp/mips/malta/make/custom/malta.cfg
+++ b/c/src/lib/libbsp/mips/malta/make/custom/malta.cfg
@@ -13,3 +13,6 @@ CPU_CFLAGS = -march=24kf1_1 -Wa,-xgot -G0
 
 # optimize flag: typically -O2
 CFLAGS_OPTIMIZE_V = -O0 -g
+CFLAGS_OPTIMIZE_V += -ffunction-sections -fdata-sections
+
+LDFLAGS = -Wl,--gc-sections