On 23.06.2017 22:27, Kamil Rytarowski wrote: > Our GNU libstdc++ headers enable float128 types on at least i386 and amd64. > > Clang/NetBSD using libstdc++ is not prepared to use these types, it > results in build failures of popular applications like CMake. > > Solutions: > 1. Teach Clang to use float128 > [Functional and pending patch has been submitted upstream] > > 2. Restrict float128 in libstdc++ to GCC (or at least disable on Clang) > > /usr/include/g++/bits/*/c++config.h > > #if !defined(__clang__) > /* Define if __float128 is supported on this host. */ > #define _GLIBCXX_USE_FLOAT128 1 > #endif > I'm going to commit this code as an intermediate solution. I will also blacklist IntelCC. I will hold on with other moves till getting compiler-rt in LLVM support in line with libstdc++ for x86 platforms. I will ask for pull-request to -8. > 3. Disable float128 in libstdc++ for everybody. > > > The first solution is being rejected by Joerg on LLVM review as there > might be incomplete support in lib[std]c++. I have no personal > preference which way to go. > > Other systems go for (1.) [OpenBSD, Linux, Cygwin etc.]. >
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