[rtems commit] m68k/uC5282: Add per-section compilation and linking ( GCI 2018)

[Joel Sherrill]

Module:    rtems
Branch:    master
Commit:    1947449a5d6f01a44ccc61eda3e78ef7e06da952
Changeset: http://git.rtems.org/rtems/commit/?id=1947449a5d6f01a44ccc61eda3e78ef7e06da952

Author:    Shashvat Jain <shashvatjain2002 at gmail.com>
Date:      Mon Nov 26 02:05:54 2018 +0530

m68k/uC5282: Add per-section compilation and linking (GCI 2018)

The size of the sample executables without this option were:

   text    data     bss     dec     hex filename
 120160    1520   14048  135728   21230 ./base_sp.exe
 205904    2112   16976  224992   36ee0 ./capture.exe
 257216    2912   15040  275168   432e0 ./cdtest.exe
 867616   21888   21776  911280   de7b0 ./cxx_iostream.exe
 574528    4640   26432  605600   93da0 ./fileio.exe
 138256    1520   14192  153968   25970 ./hello.exe
 268304    6032   20816  295152   480f0 ./loopback.exe
 102592    1376   10848  114816   1c080 ./minimum.exe
 137072    1632   14160  152864   25520 ./nsecs.exe
 213328    1920   14768  230016   38280 ./paranoia.exe
 439440   12048   43600  495088   78df0 ./pppd.exe
 122896    1536   14080  138512   21d10 ./ticker.exe
 123296    1488   17952  142736   22d90 ./unlimited.exe

The size of the sample executables with this option were:

   text    data     bss     dec     hex filename
  58752    1104    9968   69824   110c0 ./base_sp.exe
 180560    2096   14864  197520   30390 ./capture.exe
 165328    2080   10992  178400   2b8e0 ./cdtest.exe
 162288    2144   11152  175584   2ade0 ./cxx_iostream.exe
 545008    4624   24032  573664   8c0e0 ./fileio.exe
  85440    1456   10112   97008   17af0 ./hello.exe
 216528    5904   16688  239120   3a610 ./loopback.exe
  34944     960    6768   42672    a6b0 ./minimum.exe
  82064    1584   10096   93744   16e30 ./nsecs.exe
 163808    1872   10752  176432   2b130 ./paranoia.exe
 388960   11904   40768  441632   6bd20 ./pppd.exe
  61856    1136   10000   72992   11d20 ./ticker.exe
  61888    1072   13872   76832   12c20 ./unlimited.exe

Closes #2575

---

 bsps/m68k/uC5282/config/uC5282.cfg | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/bsps/m68k/uC5282/config/uC5282.cfg b/bsps/m68k/uC5282/config/uC5282.cfg
index b8e3f52..051d5a4 100644
--- a/bsps/m68k/uC5282/config/uC5282.cfg
+++ b/bsps/m68k/uC5282/config/uC5282.cfg
@@ -7,7 +7,7 @@ RTEMS_CPU = m68k
 include $(RTEMS_ROOT)/make/custom/default.cfg
 
 #  This contains the compiler options necessary to select the CPU model
-#  and (hopefully) optimize for it. 
+#  and (hopefully) optimize for it.
 CPU_CFLAGS = -mcpu=5282
 
 # optimize flag: typically -O2
@@ -15,8 +15,8 @@ CFLAGS_OPTIMIZE_V = -O2 -g
 
 # FIXME: Disabled because linkcmds lacks proper KEEP() directives. See #2575.
 # The following two lines enable compiling and linking on per element.
-# CFLAGS_OPTIMIZE_V += -ffunction-sections -fdata-sections
-# LDFLAGS = -Wl,--gc-sections
+CFLAGS_OPTIMIZE_V += -ffunction-sections -fdata-sections
+LDFLAGS = -Wl,--gc-sections
 
 define bsp-post-link
 	$(default-bsp-post-link)