I am trying to build a C++ program for ARM in an ODROID X2 board by using Linaro 12.11. In the compiling process, I found this type of error, in which I couldn't find the answer:
/tmp/ccsPcPGU.s: Assembler messages:
/tmp/ccsPcPGU.s:5488: Error: selected processor does not support Thumb mode `swp r3,sl,[fp]'
I don't even remember using Thumb mode here. Is there any suggestion how I can solve this problem?
Update:
@auselen This is what I got for gcc -v :
root@linaro-ubuntu-desktop:/# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabihf/4.6/lto-wrapper
Target: arm-linux-gnueabihf
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs --enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr --program-suffix=-4.6 --enable-shared --enable-linker-build-id --with-system-zlib --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --with-gxx-include-dir=/usr/include/c++/4.6 --libdir=/usr/lib --enable-nls --with-sysroot=/ --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin --enable-objc-gc --enable-multilib --disable-sjlj-exceptions --with-arch=armv7-a --with-float=hard --with-fpu=vfpv3-d16 --with-mode=thumb --disable-werror --enable-checking=release --build=arm-linux-gnueabihf --host=arm-linux-gnueabihf --target=arm-linux-gnueabihf
Thread model: posix
gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
I still got the same problem when I tried to compile each project constructor file by using gcc -c, so I am going to believe that there is a problem with my arm-linux-gnueabihf.
The SWP/SWPB instructions do not exist in the Thumb instruction set.
If the Linaro 12.11 toolchain defaults to Thumb, you are probably missing (or have an incorrect) instruction state directive in the assembly code.
Depending on what is causing the error (an inline asm statement included in C, or a .S file that has been preprocessed), all or parts of your project will need to be built as ARM instructions.