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ARM Compiler 6.12 L6087U/L6088U errors

omikron

Hi all.

I'm trying to build Apache Mynewt-based (https://mynewt.apache.org/) application using ARM Compiler 6.12.

Mynewt build system (newt) uses package approach. Package consists of at least one source file. For every source file (*.c) in package an object file is built (*.o). Then all object files in package are archived together to one library (*.a) file. After that all library files linked together to final image (*.elf). And this is works fine with GNU ARM embedded toolchain.

I was able to build object files. Here is template command line for compiler:

armclang --target=arm-arm-none-eabi -D...<few -D definitions> -O0 -g -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -I...<few include paths> -c -o source.o source.c

I was able to create library files. Here is template command line for librarian:

armar -rcs package.a source1.o source2.o ...

But I can't link *.a files together:

armclang-o image.elf --target=arm-arm-none-eabi -D...<few -D definitions> -O0 -g -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 package1.a package2.a

I receive following error: L6087U: Could not determine the target architecture for linking from the explicitly specified object files

Hmm, strange. Okay, try to explicitly define target architecture by applying --cpu option for linker:

armclang-o image.elf --target=arm-arm-none-eabi -D...<few -D definitions> -O0 -g -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--cpu=cortex-m4.fp package1.a package2.a

Now another error: L6088U: Could not determine the endianness for linking from the explicitly specified object files.

This time I can't move further, there is no option to explicitly define the endianness for armlink. There is no any info on errors L6087U / L6088U.

Looks like armlink can't get required information from library files.

Any suggestions?

Thank you.

Update: linker feels good if there is at least one *.o file among input files.

Is this a bug or feature of armlink? It unable to detect target when only *.a files in input list.