Failure during Make: SYS_futex not declared in scope

[cheezeburglar]

Hey all,

I'm trying to build spike on Mint. Once I succesfully configure the project with $RISCV=/opt/riscv and run make, I get this error:

In file included from /usr/include/c++/11/bits/atomic_base.h:41,
                 from /usr/include/c++/11/bits/shared_ptr_atomic.h:33,
                 from /usr/include/c++/11/memory:78,
                 from ../fesvr/context.h:12,
                 from ../fesvr/dtm.h:5,
                 from ../fesvr/dtm.cc:1:
/usr/include/c++/11/bits/atomic_wait.h: In function ‘void std::__detail::__platform_wait(const _Tp*, std::__detail::__platform_wait_t)’:
/usr/include/c++/11/bits/atomic_wait.h:108:29: error: ‘SYS_futex’ was not declared in this scope
  108 |         auto __e = syscall (SYS_futex, static_cast<const void*>(__addr),
      |                             ^~~~~~~~~
/usr/include/c++/11/bits/atomic_wait.h: In function ‘void std::__detail::__platform_notify(const _Tp*, bool)’:
/usr/include/c++/11/bits/atomic_wait.h:121:18: error: ‘SYS_futex’ was not declared in this scope
  121 |         syscall (SYS_futex, static_cast<const void*>(__addr),
      |                  ^~~~~~~~~
At global scope:
cc1plus: note: unrecognized command-line option ‘-Wno-nonportable-include-path’ may have been intended to silence earlier diagnostics
make: *** [Makefile:347: dtm.o] Error 1

I did some digging, and I can't replicate this same error in other programs that import the same headers. The above directory contains all RISCV toolchains - I don't know if that's actually important. All help appreciated.

[aswaterman]

We found the same problem when upgrading from Ubuntu 20.04 to 22.04. There's a header namespace collision that only manifests with a newer combination of system headers and libstdc++ headers. The fix is here, though it hasn't been merged yet: #1619