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martinus / robin-hood-hashing

Fast & memory efficient hashtable based on robin hood hashing for C++11/14/17/20
https://gitter.im/martinus/robin-hood-hashing
MIT License
1.5k stars 143 forks source link

test _MSC_VER instead of _WIN32 for stuff specific to Visual Studio #49

Closed adl closed 4 years ago

adl commented 4 years ago

otherwise, cross-compiling for MingW32 with i686-w64-mingw32-g++-posix -Werror fails with the following diagnosis

robin_hood.h:116: error: ignoring #pragma intrinsic  [-Werror=unknown-pragmas]
 #    pragma intrinsic(ROBIN_HOOD(BITSCANFORWARD))

But really __builtin_ctzl() is available, since it's GCC.