mipsel-linux-musl

[Andrew Kelley]

/home/andy/dev/bootstrap-zig/out/host/bin/zig  c++ -target mipsel-linux-musl   -DHAVE_CXX_ATOMICS64_WITHOUT_LIB -std=c++11  -Werror=unguarded-availability-new   -static  CMakeFiles/cmTC_52428.dir/src.cxx.o  -o cmTC_52428  -lm

#include <atomic>
#include <cstdint>
std::atomic<uint64_t> x (0);
int main() {
  uint64_t i = x.load(std::memory_order_relaxed);
  return 0;
}

lld: error: undefined symbol: __atomic_load_8
>>> referenced by src.cxx
>>>               CMakeFiles/cmTC_52428.dir/src.cxx.o:(unsigned long long std::__1::__cxx_atomic_load<unsigned long long>(std::__1::__cxx_atomic_base_impl<unsigned long long> const*, std::__1::memory_order))
>>> referenced by src.cxx
>>>               CMakeFiles/cmTC_52428.dir/src.cxx.o:(unsigned long long std::__1::__cxx_atomic_load<unsigned long long>(std::__1::__cxx_atomic_base_impl<unsigned long long> const*, std::__1::memory_order))

Looks like a missing compiler-rt function.

[Andrew Kelley]

Upstream issue: ziglang/zig#4887

[Andrew Kelley]

With ziglang/zig#4924 applied, the next issue is:

lld: error: can't create dynamic relocation R_MIPS_32 against symbol: DW.ref.__gxx_personality_v0 in readonly segment; recompile object files with -fPIC or pass '-Wl,-z,notext' to allow text relocations in the output
>>> defined in /home/andy/.cache/zig/stage1/o/T5tckQUc2lhBpJlpVGSxm8lBZ7i8OXPFEBCqlYa8FxB6Me_v4XEhobskf4rQdx8x/libc++.a(/home/andy/.cache/zig/stage1/o/qUmHtY3lH7PA5isys1yCe37lU_DsOWv1RszG5ES7L8qrmRfFKqz_W_nE_pVbhPrT/new.o)
>>> referenced by new.cpp
>>>               /home/andy/.cache/zig/stage1/o/qUmHtY3lH7PA5isys1yCe37lU_DsOWv1RszG5ES7L8qrmRfFKqz_W_nE_pVbhPrT/new.o:(.eh_frame+0x357F) in archive /home/andy/.cache/zig/stage1/o/T5tckQUc2lhBpJlpVGSxm8lBZ7i8OXPFEBCqlYa8FxB6Me_v4XEhobskf4rQdx8x/libc++.a

[Andrew Kelley]

Upstream issue: ziglang/zig#4925

[Stephen Gregoratto]

I'm able to compile/run the C++ example and the zig init-exe bin on my OpenWRT router using a toolchain built by zig-bootstrap. I've yet to run the toolchain on the device, but I'll get on that soon.

[Stephen Gregoratto]

Looks like the toolchain binaries will not run, as they all fail with illegal instruction. This is with a baseline cpu.