GCC 10

I was curious to try out GCC 10 for my ARM microcontroller project. So I tried to build it from source on my Ubuntu system using the build scripts and libraries provided with the latest release, just replacing GCC 9 with GCC 10.

Everything worked well until Newlib started to build. It stopped with the following error:

arm-none-eabi-gcc -B/gcc-arm-none-eabi-10/build-native/newlib/arm-none-eabi/thumb/v8.1-m.main+mve/hard/newlib/ -isystem /gcc-arm-none-eabi-10/build-native/newlib/arm-none-eabi/thumb/v8.1-m.main+mve/hard/newlib/targ-include -isystem /gcc-arm-none-eabi-10/src/newlib/newlib/libc/include -B/gcc-arm-none-eabi-10/build-native/newlib/arm-none-eabi/thumb/v8.1-m.main+mve/hard/libgloss/arm -L/gcc-arm-none-eabi-10/build-native/newlib/arm-none-eabi/thumb/v8.1-m.main+mve/hard/libgloss/libnosys -L/gcc-arm-none-eabi-10/src/newlib/libgloss/arm -mthumb -march=armv8.1-m.main+mve -mfloat-abi=hard -DPACKAGE_NAME=\"newlib\" -DPACKAGE_TARNAME=\"newlib\" -DPACKAGE_VERSION=\"3.3.0\" -DPACKAGE_STRING=\"newlib\ 3.3.0\" -DPACKAGE_BUGREPORT=\"\" -DPACKAGE_URL=\"\" -I. -I/gcc-arm-none-eabi-10/src/newlib/newlib/libc/argz -fno-builtin -D__NO_SYSCALLS__ -D_COMPILING_NEWLIB -DHAVE_INIT_FINI -g -O2 -ffunction-sections -fdata-sections -mthumb -march=armv8.1-m.main+mve -mfloat-abi=hard -c -o lib_a-argz_replace.o `test -f 'argz_replace.c' || echo '/gcc-arm-none-eabi-10/src/newlib/newlib/libc/argz/'`argz_replace.c
/tmp/ccDe77Wp.s: Assembler messages:
/tmp/ccDe77Wp.s:3: Error: unknown architecture extension `mve'

/tmp/ccDe77Wp.s:23: Error: unknown architecture extension `mve'

/tmp/ccyPoB1p.s: Assembler messages:
/tmp/ccyPoB1p.s:3: Error: unknown architecture extension `mve'

/tmp/ccyPoB1p.s:23: Error: unknown architecture extension `mve'

/tmp/cct9070p.s: Assembler messages:
/tmp/cct9070p.s:3: Error: unknown architecture extension `mve'

/tmp/cct9070p.s:23: Error: unknown architecture extension `mve'

Makefile:417: recipe for target 'lib_a-argz_count.o' failed

[...]

Does anyone have an idea why GCC 10 assembler obviously doesn't know the 'mve' architecture extension? How can I fix this?

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