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Bitcoin Cross-Platform C++ Development Toolkit

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GCC: warning: ignoring attributes on template argument.

evoskuil opened this issue · comments

commented 
In file included from ./include/bitcoin/system/intrinsics/haves.hpp:26,
                 from ./include/bitcoin/system/intrinsics/intrinsics.hpp:24,
                 from ./include/bitcoin/system/impl/math/byteswap.ipp:24,
                 from ./include/bitcoin/system/math/byteswap.hpp:57,
                 from ./include/bitcoin/system/math/math.hpp:25,
                 from ./include/bitcoin/system/chain/enums/forks.hpp:23,
                 from ./include/bitcoin/system/chain/context.hpp:23,
                 from ./include/bitcoin/system/chain/block.hpp:24,
                 from ./include/bitcoin/system/chain/chain.hpp:22,
                 from ./include/bitcoin/system/settings.hpp:22,
                 from ./include/bitcoin/system.hpp:25,
                 from examples/main.cpp:21:
./include/bitcoin/system/intrinsics/xcpu/functional_128.hpp:149:29: warning: ignoring attributes on template argument ‘libbitcoin::system::xint128_t’ {aka ‘__m128i’} [-Wignored-attributes]
  149 |     if_same<xWord, xint128_t> = true, if_integral_integer<Word> = true>
      |                             ^
./include/bitcoin/system/intrinsics/xcpu/functional_128.hpp:187:51: warning: ignoring attributes on template argument ‘libbitcoin::system::xint128_t’ {aka ‘__m128i’} [-Wignored-attributes]
  187 | template <typename xWord, if_same<xWord, xint128_t> = true>
      |                                                   ^
./include/bitcoin/system/intrinsics/xcpu/functional_128.hpp:195:51: warning: ignoring attributes on template argument ‘libbitcoin::system::xint128_t’ {aka ‘__m128i’} [-Wignored-attributes]
  195 | template <typename xWord, if_same<xWord, xint128_t> = true>
      |                                                   ^
./include/bitcoin/system/intrinsics/xcpu/functional_128.hpp:203:51: warning: ignoring attributes on template argument ‘libbitcoin::system::xint128_t’ {aka ‘__m128i’} [-Wignored-attributes]
  203 | template <typename xWord, if_same<xWord, xint128_t> = true>
      |                                                   ^
./include/bitcoin/system/intrinsics/xcpu/functional_128.hpp:213:51: warning: ignoring attributes on template argument ‘libbitcoin::system::xint128_t’ {aka ‘__m128i’} [-Wignored-attributes]
  213 | template <typename xWord, if_same<xWord, xint128_t> = true>
      |                                                   ^

https://github.com/libbitcoin/libbitcoin-system/actions/runs/7681642280/job/20949298061?pr=1378#step:8:613

commented

There is a detailed explanation of this issue here.
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97222

The compiler bug is legit, also applies to Clang, and impacts the ABI. It is marked with an undefined status of 'SUSPENDED'... WTF?

commented

We have not encountered any failures despite extensive runtime testing with the affected Intel intrinsic types. I suggest that we suppress this warning [-Wignored-attributes] as there appears to be no other alternative except avoidance of templates.

commented

Resolved