updates #2577.
For the milkymist BSP variant without this option sample executables
sizes were as follows:
text data bss dec hex filename
101160 9044 13333 123537 1e291 ticker.exe
30888 2676 9169 42733 a6ed minimum.exe
592200 90020 26557 708777 ad0a9 fileio.exe
456048 64528 42565 563141 897c5 pppd.exe
203752 25404 16241 245397 3be95 capture.exe
118216 10704 13437 142357 22c15 nsecs.exe
197848 22468 13981 234297 39339 paranoia.exe
97496 8760 13301 119557 1d305 base_sp.exe
100392 9120 17141 126653 1eebd unlimited.exe
121032 7720 13309 142061 22aed hello.exe
289340 28120 20653 338113 528c1 loopback.exe
For the milkymist BSP variant with this option sample executables
sizes were as follows:
text data bss dec hex filename
93464 8748 13333 115545 1c359 ticker.exe
17144 1308 9133 27585 6bc1 minimum.exe
574024 87296 26301 687621 a7e05 fileio.exe
415668 60652 41837 518157 7e80d pppd.exe
190920 24712 16233 231865 389b9 capture.exe
111800 10404 13405 135609 211b9 nsecs.exe
187272 22064 13949 223285 36835 paranoia.exe
87656 8440 13301 109397 1ab55 base_sp.exe
89048 8736 17149 114933 1c0f5 unlimited.exe
108888 7316 13309 129513 1f9e9 hello.exe
262820 26764 20557 310141 4bb7d loopback.exe
---
c/src/lib/libbsp/lm32/milkymist/make/custom/milkymist.cfg | 3 +++
1 file changed, 3 insertions(+)
diff --git a/c/src/lib/libbsp/lm32/milkymist/make/custom/milkymist.cfg
b/c/src/lib/libbsp/lm32/milkymist/make/custom/milkymist.cfg
index ae691eb..97fcb9e 100644
--- a/c/src/lib/libbsp/lm32/milkymist/make/custom/milkymist.cfg
+++ b/c/src/lib/libbsp/lm32/milkymist/make/custom/milkymist.cfg
@@ -19,6 +19,9 @@ CPU_CFLAGS = -mbarrel-shift-enabled -mmultiply-enabled \
# optimize flag: typically -O2
CFLAGS_OPTIMIZE_V = -O2 -g
+CFLAGS_OPTIMIZE_V += -ffunction-sections -fdata-sections
+
+LDFLAGS = -Wl,--gc-sections
define bsp-post-link
$(OBJCOPY) -O binary --strip-all $(basename $@)$(EXEEXT) \
--
1.8.3.1
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