On Sun, 19 Jul 2020 at 10:04, Matwey V. Kornilov via Gcc-help <gcc-help@xxxxxxxxxxx> wrote: > > Hi, > > I am trying to build freestanding libstdc++ [1] for avr target in gcc > 10.1. Initially, I wanted to play with coroutines, so I need <coroutine>. > > I use --enable-libstdcxx --disable-host-libstdcxx for configure. > > ./configure script runs fine with this arguments, but then make fails > with the following: > > checking if /home/matwey/temp/gcc-10.1.0/build/./gcc/xgcc > -B/home/matwey/temp/gcc-10.1.0/build/./gcc/ -B/usr/avr/bin/ > -B/usr/avr/lib/ -isystem /usr/avr/include -isystem /usr/avr/sys-include > --sysroot=/usr/avr/sys-root -mmcu=avrxmega3 supports -fno-rtti > -fno-exceptions... no > checking for /home/matwey/temp/gcc-10.1.0/build/./gcc/xgcc > -B/home/matwey/temp/gcc-10.1.0/build/./gcc/ -B/usr/avr/bin/ > -B/usr/avr/lib/ -isystem /usr/avr/include -isystem /usr/avr/sys-include > --sysroot=/usr/avr/sys-root -mmcu=avrxmega3 option to produce PIC... > -fPIC -DPIC > checking if /home/matwey/temp/gcc-10.1.0/build/./gcc/xgcc > -B/home/matwey/temp/gcc-10.1.0/build/./gcc/ -B/usr/avr/bin/ > -B/usr/avr/lib/ -isystem /usr/avr/include -isystem /usr/avr/sys-include > --sysroot=/usr/avr/sys-root -mmcu=avrxmega3 PIC flag -fPIC -DPIC > works... no > checking if /home/matwey/temp/gcc-10.1.0/build/./gcc/xgcc > -B/home/matwey/temp/gcc-10.1.0/build/./gcc/ -B/usr/avr/bin/ > -B/usr/avr/lib/ -isystem /usr/avr/include -isystem /usr/avr/sys-include > --sysroot=/usr/avr/sys-root -mmcu=avrxmega3 static flag -static works... no > checking if /home/matwey/temp/gcc-10.1.0/build/./gcc/xgcc > -B/home/matwey/temp/gcc-10.1.0/build/./gcc/ -B/usr/avr/bin/ > -B/usr/avr/lib/ -isystem /usr/avr/include -isystem /usr/avr/sys-include > --sysroot=/usr/avr/sys-root -mmcu=avrxmega3 supports -c -o file.o... yes > checking if /home/matwey/temp/gcc-10.1.0/build/./gcc/xgcc > -B/home/matwey/temp/gcc-10.1.0/build/./gcc/ -B/usr/avr/bin/ > -B/usr/avr/lib/ -isystem /usr/avr/include -isystem /usr/avr/sys-include > --sysroot=/usr/avr/sys-root -mmcu=avrxmega3 supports -c -o file.o... > (cached) yes > checking whether the /home/matwey/temp/gcc-10.1.0/build/./gcc/xgcc > -B/home/matwey/temp/gcc-10.1.0/build/./gcc/ -B/usr/avr/bin/ > -B/usr/avr/lib/ -isystem /usr/avr/include -isystem /usr/avr/sys-include > --sysroot=/usr/avr/sys-root -mmcu=avrxmega3 linker > (/home/matwey/temp/gcc-10.1.0/build/./gcc/collect-ld) supports shared > libraries... yes > checking whether -lc should be explicitly linked in... yes > checking dynamic linker characteristics... no > checking how to hardcode library paths into programs... immediate > checking for shl_load... configure: error: Link tests are not allowed > after GCC_NO_EXECUTABLES. > make[1]: *** [Makefile:10635: configure-target-libstdc++-v3] Error 1 > make[1]: Leaving directory '/home/matwey/temp/gcc-10.1.0/build' > make: *** [Makefile:954: all] Error 2 > > > Is it configuration supported for avr architecture? I think it's not supported for avr. But I've been meaning to try it for a few months and try to fix what fails, because I think it would be really good to be able to use the freestanding parts of the C++ library for Arduino projects.
