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Patched the LUFA build system to work around a GCC code generation bug in newer toolchains when building for larger FLASH memory devices (thanks to demultiplexer)

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This commit is contained in:
Dean Camera 2014-08-26 21:18:59 +10:00
parent 0fd7b2cf09
commit d0a147f5bb
3 changed files with 9 additions and 1 deletions
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6
LUFA/Build/lufa_build.mk
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@ -199,6 +199,12 @@ ifeq ($(LINKER_RELAXATIONS), Y)
BASE_CC_FLAGS += -mrelax
endif
# This flag is required for bootloaders as GCC will emit invalid jump table
# assembly code for devices with large amounts of flash; the jump table target
# is extracted from FLASH without using the correct ELPM instruction, resulting
# in a pseudo-random jump target.
BASE_CC_FLAGS += -fno-jump-tables
# Additional language specific compiler flags
BASE_C_FLAGS := -x c -O$(OPTIMIZATION) -std=$(C_STANDARD) -Wstrict-prototypes
BASE_CPP_FLAGS := -x c++ -O$(OPTIMIZATION) -std=$(CPP_STANDARD)

2
LUFA/DoxygenPages/ChangeLog.txt
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@ -21,6 +21,8 @@
* - Fixed possible infinite loop in the control endpoint stream write function (thanks to Clayton Knight)
* - Fixed missing HID report ID prefix on HID class driver GetReport request responses (thanks to Bert van Hall)
* - Fixed incorrect XMEGA USB controller clock division factory for non-Full Speed operation (thanks to Bert van Hall)
* - Patched the LUFA build system to work around a GCC code generation bug in newer toolchains when building for larger
* FLASH memory devices (thanks to demultiplexer)
* - Library Applications:
* - Fixed spurious 0xFE USART byte sent in the USBtoSerial project when the baud rate is changed (thanks to Carl Kjeldsen)
* - Fixed blocking USART reads causing low throughput on slow baud rates in the USBtoSerial project (thanks to Nevada Smith)

2
LUFA/StudioIntegration/lufa_toolchain.xml
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@ -20,7 +20,7 @@
<toolchain-config name="avrgcc.compiler.optimization.OtherFlags" value="-fdata-sections" toolchain="avrgcc"/>
<toolchain-config name="avrgcc.compiler.optimization.PrepareFunctionsForGarbageCollection" value="True" toolchain="avrgcc"/>
<toolchain-config name="avrgcc.compiler.warnings.AllWarnings" value="True" toolchain="avrgcc"/>
<toolchain-config name="avrgcc.compiler.miscellaneous.OtherFlags" value="-mrelax -std=gnu99 -fno-strict-aliasing" toolchain="avrgcc"/>
<toolchain-config name="avrgcc.compiler.miscellaneous.OtherFlags" value="-mrelax -std=gnu99 -fno-strict-aliasing -fno-jump-tables" toolchain="avrgcc"/>
<toolchain-config name="avrgcc.linker.optimization.GarbageCollectUnusedSections" value="True" toolchain="avrgcc"/>
<toolchain-config name="avrgcc.linker.optimization.RelaxBranches" value="True" toolchain="avrgcc"/>
</module>