Hi,
I don't know if this is the right place to ask.
This is not it. Most probably the right place to ask is gcc-help@xxxxxxxxxxx
I was trying to enable the "thumb" option for gcc. I just tried to compile a helloworld.c file with the "-mthumb" option. gcc said that "unknown option: thumb".
Just to make sure, who said that: gcc or arm-elf-gcc ? :)
So, I enabled
MULTILIB_OPTIONS += mcpu=arm7 MULTILIB_DIRNAMES += nofmult MULTILIB_EXCEPTIONS += *mthumb*/*mcpu=arm7*
This is irrelevant to the existance of the -mthumb option.
in "gcc/config/arm/t-arm-elf" file, configured gcc, re-installed it. but, could not enable the "-mthumb" option although gcc seems to work fine. I installed gcc-3.4.2. arm-elf-gcc version 2.95.3 20010315 with the coldfire patches is also installed.
I do not remember exactly when, but at one point ARM and THUMB were separate compilers, i.e. you might well need thumb-elf-gcc 2.95.x. In >= 3.x.x series they are one compiler and the THUMB code generation is selected with -mthumb.
~velco
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