firmware: add -gc-sections to save 2 bytes

micronucleus · Apr 27, 2016 · 70a0947 · 70a0947
1 parent b23ba5b
commit 70a0947
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Showing 9 changed files with 263 additions and 263 deletions.
diff --git a/Readme.txt b/Readme.txt
@@ -44,12 +44,12 @@ To allow maximum flexibility, micronucleus supports a configuration system. To c
 
 Currently, the following configurations are included and tested. Please check the subfolders /firmware/configurations/ for details. Hex files can be found in /releases.
 
-t84_default     -   ATtiny84A default configuration     -   1544 bytes
-t841_default    -   ATtiny841 default configuration     -   1596 bytes
-t85_default     -   ATtiny85  default configuration     -   1598 bytes
-t85_aggressive  -   ATtiny85  smaller size - critical   -   1428 bytes
-t167_default    -   ATtiny167 default (uses xtal)       -   1424 bytes
-Nanite841       -   Nanite841 firmware                  -   1620 bytes
+t84_default     -   ATtiny84A default configuration     -   1542 bytes
+t841_default    -   ATtiny841 default configuration     -   1594 bytes
+t85_default     -   ATtiny85  default configuration     -   1596 bytes
+t85_aggressive  -   ATtiny85  smaller size - critical   -   1426 bytes
+t167_default    -   ATtiny167 default (uses xtal)       -   1422 bytes
+Nanite841       -   Nanite841 firmware                  -   1618 bytes
 
 You can add your own configuration by adding a new folder to /firmware/configurations/. The folder has to contain a customized "Makefile.inc" and "bootloaderconfig.h". Feel free to supply a pull request if you added and tested a previously unsupported device.
 

diff --git a/firmware/Makefile b/firmware/Makefile
@@ -34,7 +34,7 @@ CFLAGS += -I. -g2 -Os # -Wall
 CFLAGS += -I$(CONFIGPATH) -mmcu=$(DEVICE) -DF_CPU=$(F_CPU) -DBOOTLOADER_ADDRESS=0x$(BOOTLOADER_ADDRESS) 
 CFLAGS += -nostartfiles -ffunction-sections -fdata-sections -fpack-struct -fno-inline-small-functions -fno-move-loop-invariants -fno-tree-scev-cprop
 
-LDFLAGS = -Wl,--relax,--section-start=.text=$(BOOTLOADER_ADDRESS),-Map=main.map
+LDFLAGS = -Wl,--relax,--section-start=.text=$(BOOTLOADER_ADDRESS),--gc-sections,-Map=main.map
 
 OBJECTS =  crt1.o usbdrv/usbdrvasm.o usbdrv/oddebug.o main.o 
 OBJECTS += osccalASM.o

diff --git a/firmware/releases/Nanite841.hex b/firmware/releases/Nanite841.hex
@@ -58,47 +58,47 @@
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diff --git a/firmware/releases/t167_default.hex b/firmware/releases/t167_default.hex
@@ -1,7 +1,7 @@
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diff --git a/firmware/releases/t45_default.hex b/firmware/releases/t45_default.hex
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diff --git a/firmware/releases/t841_default.hex b/firmware/releases/t841_default.hex
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