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m68k/mcf52235:Add per-section compilation and linking support(GCI 2018)

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The size of the sample executables without this option were:

   text    data     bss     dec     hex filename
  69776    1104    4080   74960   124d0 ./base_sp.exe
 103376    1472    4192  109040   1a9f0 ./hello.exe
  37808     304    2768   40880    9fb0 ./minimum.exe
  93152    1584    4208   98944   18280 ./nsecs.exe
  72784    1136    4112   78032   130d0 ./ticker.exe
  72608    1088    7952   81648   13ef0 ./unlimited.exe

The size of the sample executables with this option were:

   text    data     bss     dec     hex filename
  65120    1104    4000   70224   11250 ./base_sp.exe
  94448    1472    4160  100080   186f0 ./hello.exe
  36928     304    2736   39968    9c20 ./minimum.exe
  87072    1584    4128   92784   16a70 ./nsecs.exe
  67888    1136    4032   73056   11d60 ./ticker.exe
  70816    1088    7920   79824   137d0 ./unlimited.exe

Closes #2570
This commit is contained in:
Shashvat Jain
2018-11-28 23:23:36 +05:30
committed by Joel Sherrill
parent 9c4dc7b01f
commit 1fe6d11737
1 changed files with 3 additions and 3 deletions
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6
bsps/m68k/mcf52235/config/mcf52235.cfg
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@@ -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=52235
# optimize flag: typically -O2
@@ -15,8 +15,8 @@ CFLAGS_OPTIMIZE_V = -O2 -g -fomit-frame-pointer
# FIXME: Disabled because linkcmds lacks proper KEEP() directives. See #2570.
# 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
# This defines the operations performed on the linked executable.
# is currently required.