Yep, -mno-unaligned-access is definitely needed with a GCC 4.7

ToolChain, the kernel used on FW 2.x is too old to handle unaligned accesses properly.
12 years ago · 42e66cc605
parent 24b9678dc6
commit 42e66cc605
1 changed files with 1 additions and 1 deletions
--- a/2
+++ b/2
@ -36,7 +36,7 @@ BASE_CFLAGS:=-O2 -ffast-math -pipe -fomit-frame-pointer
 # Use this for debugging:
 #BASE_CFLAGS:=-O0 -g
 # Misc GCC tricks to ensure backward compatibility with the K2, even when using a fairly recent TC (Linaro/MG).
-# NOTE: Right now, -mno-unaligned-access is not needed, but it probably will (for FW 2.x) be once MG moves to GCC 4.7.
+# NOTE: -mno-unaligned-access is needed for Linaro 4.6/4.7 and GCC 4.7 TC, or weird crap happens on FW 2.x. We unfortunately can't set it by default, since it's a new flag.
 ARM_BACKWARD_COMPAT_CFLAGS:=-fno-stack-protector -U_FORTIFY_SOURCE -D_GNU_SOURCE -fno-finite-math-only
 ARM_BACKWARD_COMPAT_CXXFLAGS:=-fno-use-cxa-atexit
 ARM_ARCH:=-march=armv6j -mtune=arm1136jf-s -mfpu=vfp -mfloat-abi=softfp -marm