arm/lpc32xx: Add per-section compilation and linking suppo

updates #2577.

For the lpc32xx_mzx BSP variant without this option, sample executable
sizes were as follows:

   text	   data	    bss	    	  dec	    	  hex	filename
  59920	   1740	33734408	33796068	203afe4	ticker.exe
  24692	   1088	33770304	33796084	203aff4	minimum.exe
 592796	   2148	33201136	33796080	203aff0	cxx_iostream.exe
 414056	   5952	33376076	33796084	203aff4	fileio.exe
 326320	  12768	33456988	33796076	203afec	pppd.exe
 146728	   2504	33646840	33796072	203afe8	capture.exe
  77064	   1952	33717072	33796088	203aff8	nsecs.exe
 137172	   2244	33656676	33796092	203affc	paranoia.exe
 138600	   1896	33655576	33796072	203afe8	cdtest.exe
  58128	   1740	33736200	33796068	203afe4	base_sp.exe
  62324	   1764	33732004	33796092	203affc	unlimited.exe
  80796	   1844	33713436	33796076	203afec	hello.exe
 196520	   6652	33592904	33796076	203afec	loopback.exe

For the lpc32xx_mzx BSP variant with this option, sample executable
sizes were as follows:

   text	   data	    bss	    	  dec	    	  hex	filename
  53781	   1728	33740576	33796085	203aff5	ticker.exe
  14988	    288	33780808	33796084	203aff4	minimum.exe
 373552	   2120	33420412	33796084	203aff4	cxx_iostream.exe
 400208	   5940	33389924	33796072	203afe8	fileio.exe
 301008	  12616	33482440	33796064	203afe0	pppd.exe
 138944	   2484	33654656	33796084	203aff4	capture.exe
  71588	   1940	33722548	33796076	203afec	nsecs.exe
 131068	   2232	33662780	33796080	203aff0	paranoia.exe
 130800	   1884	33663408	33796092	203affc	cdtest.exe
  52132	   1728	33742228	33796088	203aff8	base_sp.exe
  55368	   1736	33738960	33796064	203afe0	unlimited.exe
  73564	   1792	33720732	33796088	203aff8	hello.exe
 180984	   6552	33608544	33796080	203aff0	loopback.exe

For the lpc32xx_mzx_stage_1 BSP variant without this option, sample executable
sizes were as follows:

   text	   data	    bss	    	  dec	    	  hex	filename
  51348	   1740	 192640	 245728	  3bfe0	ticker.exe
  20608	   1088	 224032	 245728	  3bfe0	minimum.exe
 132440	   2504	 110784	 245728	  3bfe0	capture.exe
  68564	   1952	 175232	 245748	  3bff4	nsecs.exe
 124196	   2244	 119296	 245736	  3bfe8	paranoia.exe
 129372	   1896	 114464	 245732	  3bfe4	cdtest.exe
  49780	   1740	 194208	 245728	  3bfe0	base_sp.exe
  53588	   1764	 190400	 245752	  3bff8	unlimited.exe
  73084	   1844	 170816	 245744	  3bff0	hello.exe
 172920	   6644	  66176	 245740	  3bfec	loopback.exe

For the lpc32xx_mzx_stage_1 BSP variant with this option, sample executable
sizes were as follows:

   text	   data	    bss	    	  dec	    	  hex	filename
  46928	   1728	 197088	 245744	  3bff0	ticker.exe
  13562	    288	 231904	 245754	  3bffa	minimum.exe
 126656	   2484	 116608	 245748	  3bff4	capture.exe
  64704	   1940	 179104	 245748	  3bff4	nsecs.exe
 120276	   2232	 123232	 245740	  3bfec	paranoia.exe
 123188	   1884	 120672	 245744	  3bff0	cdtest.exe
  45512	   1728	 198496	 245736	  3bfe8	base_sp.exe
  48496	   1736	 195520	 245752	  3bff8	unlimited.exe
  67700	   1792	 176256	 245748	  3bff4	hello.exe
 160456	   6544	  78752	 245752	  3bff8	loopback.exe

For the lpc32xx_mzx_stage_2 BSP variant without this option, sample executable
sizes were as follows:

   text	   data	    bss	    	  dec	    	  hex	filename
  59920	   1740	4378400	4440060	 43bffc	ticker.exe
  24692	   1088	4414272	4440052	 43bff4	minimum.exe
 592796	   2148	3845088	4440032	 43bfe0	cxx_iostream.exe
 414064	   5952	4020032	4440048	 43bff0	fileio.exe
 326320	  12768	4100960	4440048	 43bff0	pppd.exe
 146728	   2504	4290816	4440048	 43bff0	capture.exe
  77064	   1952	4361024	4440040	 43bfe8	nsecs.exe
 137172	   2244	4300640	4440056	 43bff8	paranoia.exe
 138600	   1896	4299552	4440048	 43bff0	cdtest.exe
  58128	   1740	4380192	4440060	 43bffc	base_sp.exe
  62324	   1764	4375968	4440056	 43bff8	unlimited.exe
  80796	   1844	4357408	4440048	 43bff0	hello.exe
 196520	   6652	4236864	4440036	 43bfe4	loopback.exe

For the lpc32xx_mzx_stage_2 BSP variant with this option, sample executable
sizes were as follows:

   text	   data	    bss	    	  dec	    	  hex	filename
  53781	   1728	4384544	4440053	 43bff5	ticker.exe
  14988	    288	4424768	4440044	 43bfec	minimum.exe
 373552	   2120	4064384	4440056	 43bff8	cxx_iostream.exe
 400216	   5940	4033888	4440044	 43bfec	fileio.exe
 301008	  12616	4126432	4440056	 43bff8	pppd.exe
 138944	   2484	4298624	4440052	 43bff4	capture.exe
  71588	   1940	4366528	4440056	 43bff8	nsecs.exe
 131068	   2232	4306752	4440052	 43bff4	paranoia.exe
 130800	   1884	4307360	4440044	 43bfec	cdtest.exe
  52132	   1728	4386176	4440036	 43bfe4	base_sp.exe
  55368	   1736	4382944	4440048	 43bff0	unlimited.exe
  73564	   1792	4364672	4440028	 43bfdc	hello.exe
 180984	   6552	4252512	4440048	 43bff0	loopback.exe

For the lpc32xx_phycore BSP variant without this option, sample executable
sizes were as follows:

   text	   data	    bss	    	  dec	    	  hex	filename
  59908	   1740	67292952	67354600	403bfe8	ticker.exe
  24680	   1088	67328848	67354616	403bff8	minimum.exe
 592784	   2148	66759680	67354612	403bff4	cxx_iostream.exe
 414048	   5952	66934616	67354616	403bff8	fileio.exe
 326308	  12768	67015532	67354608	403bff0	pppd.exe
 146716	   2504	67205384	67354604	403bfec	capture.exe
  77052	   1952	67275616	67354620	403bffc	nsecs.exe
 137160	   2244	67215220	67354624	403c000	paranoia.exe
 138588	   1896	67214120	67354604	403bfec	cdtest.exe
  58116	   1740	67294744	67354600	403bfe8	base_sp.exe
  62312	   1764	67290548	67354624	403c000	unlimited.exe
  80784	   1844	67271980	67354608	403bff0	hello.exe
 196508	   6652	67151448	67354608	403bff0	loopback.exe

For the lpc32xx_phycore BSP variant with this option, sample executable
sizes were as follows:

   text	   data	    bss	    	  dec	    	  hex	filename
  53769	   1728	67299120	67354617	403bff9	ticker.exe
  14976	    288	67339352	67354616	403bff8	minimum.exe
 373540	   2120	66978956	67354616	403bff8	cxx_iostream.exe
 400200	   5940	66948464	67354604	403bfec	fileio.exe
 300996	  12616	67040984	67354596	403bfe4	pppd.exe
 138932	   2484	67213200	67354616	403bff8	capture.exe
  71576	   1940	67281092	67354608	403bff0	nsecs.exe
 131056	   2232	67221324	67354612	403bff4	paranoia.exe
 130788	   1884	67221952	67354624	403c000	cdtest.exe
  52120	   1728	67300772	67354620	403bffc	base_sp.exe
  55356	   1736	67297504	67354596	403bfe4	unlimited.exe
  73552	   1792	67279276	67354620	403bffc	hello.exe
 180972	   6552	67167088	67354612	403bff4	loopback.exe

1 files changed, 3 insertions, 0 deletions

diff --git a/c/src/lib/libbsp/arm/lpc32xx/make/custom/lpc32xx.inc b/c/src/lib/libbsp/arm/lpc32xx/make/custom/lpc32xx.inc
index 2db07a9ed5..f184741242 100644
--- a/c/src/lib/libbsp/arm/lpc32xx/make/custom/lpc32xx.inc
+++ b/c/src/lib/libbsp/arm/lpc32xx/make/custom/lpc32xx.inc
@@ -9,3 +9,6 @@ RTEMS_CPU = arm
 CPU_CFLAGS = -mcpu=arm926ej-s -mthumb
 
 CFLAGS_OPTIMIZE_V ?= -O2 -g
+CFLAGS_OPTIMIZE_V += -ffunction-sections -fdata-sections
+
+LDFLAGS = -Wl,--gc-sections