[LLVMLibUnwind@19] Rebuild for riscv64

[giordano]

No description provided.

[giordano]

[12:19:58] [20/21] : && /opt/bin/riscv64-linux-gnu-libgfortran5-cxx11/riscv64-linux-gnu-gcc --sysroot=/opt/riscv64-linux-gnu/riscv64-linux-gnu/sys-root/ -fPIC -Werror=date-time -fno-lifetime-dse -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -Wimplicit-fallthrough -Wno-comment -fdiagnostics-color -ffunction-sections -fdata-sections -Os -DNDEBUG  -Wl,-z,defs -Wl,-z,nodelete  -nostdlib++ -shared -Wl,-soname,libunwind.so.1 -o lib/libunwind.so.1.0 libunwind/src/CMakeFiles/unwind_shared_objects.dir/libunwind.cpp.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/Unwind-EHABI.cpp.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/Unwind-seh.cpp.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/UnwindLevel1.c.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/UnwindLevel1-gcc-ext.c.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/Unwind-sjlj.c.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/Unwind-wasm.c.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/UnwindRegistersRestore.S.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/UnwindRegistersSave.S.o   && :
[12:19:58] ninja: job failed: : && /opt/bin/riscv64-linux-gnu-libgfortran5-cxx11/riscv64-linux-gnu-gcc --sysroot=/opt/riscv64-linux-gnu/riscv64-linux-gnu/sys-root/ -fPIC -Werror=date-time -fno-lifetime-dse -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -Wimplicit-fallthrough -Wno-comment -fdiagnostics-color -ffunction-sections -fdata-sections -Os -DNDEBUG  -Wl,-z,defs -Wl,-z,nodelete  -nostdlib++ -shared -Wl,-soname,libunwind.so.1 -o lib/libunwind.so.1.0 libunwind/src/CMakeFiles/unwind_shared_objects.dir/libunwind.cpp.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/Unwind-EHABI.cpp.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/Unwind-seh.cpp.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/UnwindLevel1.c.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/UnwindLevel1-gcc-ext.c.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/Unwind-sjlj.c.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/Unwind-wasm.c.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/UnwindRegistersRestore.S.o libunwind/src/CMakeFiles/unwind_shared_objects.dir/UnwindRegistersSave.S.o   && :
[12:19:58] riscv64-linux-gnu-gcc: error: unrecognized command-line option ‘-nostdlib++’

don't have the time to debug this now.

Edit: I found llvm/llvm-project#90332, which I see @Zentrik linked in llvm/llvm-project#98440.

[Zentrik]

Looks like this only works for the other arches because -nostdlib++ was only added in gcc 13 so libunwind doesn't try to use it. Not sure why it's not using g++ though.