Kefu Chai 4c726846e4 cmake: do not use GCC extension when detecting 16-bit atomic op ... we have following error when trying to compile the C++ source file on mipsel: /usr/bin/c++ -DHAVE_CXX11_ATOMIC -g -O2 -ffile-prefix-map=/<<PKGBUILDDIR>>=. -fstack-protector-strong -Wformat -Werror=format-security -g1 -Wdate-time -D_FORTIFY_SOURCE=2 -std=c++11 -fPIE -o CMakeFiles/cmTC_9f34f.dir/src.cxx.o -c /<<PKGBUILDDIR>>/obj-mipsel-linux-gnu/CMakeFiles/CMakeTmp/src.cxx /<<PKGBUILDDIR>>/obj-mipsel-linux-gnu/CMakeFiles/CMakeTmp/src.cxx:15:44: error: template argument 1 is invalid 15 | bool atomic16(std::atomic<unsigned __int128> *ptr) | ^ /<<PKGBUILDDIR>>/obj-mipsel-linux-gnu/CMakeFiles/CMakeTmp/src.cxx:15:44: error: template argument 1 is invalid /<<PKGBUILDDIR>>/obj-mipsel-linux-gnu/CMakeFiles/CMakeTmp/src.cxx:15:44: error: template argument 1 is invalid /<<PKGBUILDDIR>>/obj-mipsel-linux-gnu/CMakeFiles/CMakeTmp/src.cxx:15:44: error: template argument 1 is invalid /<<PKGBUILDDIR>>/obj-mipsel-linux-gnu/CMakeFiles/CMakeTmp/src.cxx:15:47: error: ‘ptr’ was not declared in this scope 15 | bool atomic16(std::atomic<unsigned __int128> *ptr) | ^~~ the compiler was GCC 11.2.0. in this change, instead of detecting the architecture, check for the macro of `__SIZEOF_INT128__`, which is respected by GCC and Clang. so it's more readable. also, instead of using the `unsigned __int128` type provided as a GCC extension, use a struct to mimic the use case of boost::lockfree library. Signed-off-by: Kefu Chai <tchaikov@gmail.com>		2022-03-10 22:54:51 +08:00
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modules	cmake: do not use GCC extension when detecting 16-bit atomic op	2022-03-10 22:54:51 +08:00