temisu/ancient

g++

polluks opened this issue · 1 comments

polluks commented 
g++ -Wno-multichar -Isrc -std=c++14 -fno-rtti -o LZCBDecompressor.o -c src/LZCBDecompressor.cpp
src/LZCBDecompressor.cpp:141:59: error: conflicting declaration 'constexpr const std::array<unsigned int, FrequencyTree<T>::levels()> FrequencyTree<T>::_levelOffsets'
  141 | constexpr std::array<uint32_t,FrequencyTree<T>::levels()> FrequencyTree<T>::_levelOffsets;
      |                                                           ^~~~~~~~~~~~~~~~
src/LZCBDecompressor.cpp:134:49: note: previous declaration as 'constexpr const std::array<unsigned int, FrequencyTree<T>::levels()> FrequencyTree<T>::_levelOffsets'
  134 |  static constexpr std::array<uint32_t,levels()> _levelOffsets=makeArray(makeLevelOffsetSequence(std::make_integer_sequence<uint32_t,levels()>{}));
      |                                                 ^~~~~~~~~~~~~
src/LZCBDecompressor.cpp:144:59: error: conflicting declaration 'constexpr const std::array<unsigned int, FrequencyTree<T>::levels()> FrequencyTree<T>::_levelSizes'
  144 | constexpr std::array<uint32_t,FrequencyTree<T>::levels()> FrequencyTree<T>::_levelSizes;
      |                                                           ^~~~~~~~~~~~~~~~
src/LZCBDecompressor.cpp:135:49: note: previous declaration as 'constexpr const std::array<unsigned int, FrequencyTree<T>::levels()> FrequencyTree<T>::_levelSizes'
  135 |  static constexpr std::array<uint32_t,levels()> _levelSizes=makeArray(makeLevelSizeSequence(std::make_integer_sequence<uint32_t,levels()>{}));
      |                                                 ^~~~~~~~~~~

BTW https://stackoverflow.com/questions/45918292/gcc-equivalent-of-wshorten-64-to-32

temisu commented

This seems to be non-standard behavior from gcc, which enables c++17 static member behavior even when c++14 standard is defined from command line.

I added #ifdef to the code, it should now compile cleanly if you change the standard to c++17 from the Makefile. Also changed the narrowing flag

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