Patched the LUFA build system to work around a GCC code generation bug in newer toolc...

[pub/lufa.git] / LUFA / Build / lufa_build.mk

diff --git a/LUFA/Build/lufa_build.mk b/LUFA/Build/lufa_build.mk
index 1bdfa1d..b9b144a 100644 (file)
--- a/LUFA/Build/lufa_build.mk
+++ b/LUFA/Build/lufa_build.mk
@@ -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)