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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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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)