https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=219862
--- Comment #4 from gr...@kde.org --- Created attachment 183379 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=183379&action=edit Test for C++17 detection Here's a simple C++17 program, a CMakeLists.txt that demands C++17, and a Makefile that tries building the program with base-c++ and clang++3* and clang++40 (what succeeds depends on what is installed on your system). On FreeBSD 11.0, base-c++ gives me thie same output as the OP: ### /usr/bin/c++ ### ### /usr/bin/c++ --version FreeBSD clang version 3.8.0 (tags/RELEASE_380/final 262564) (based on LLVM 3.8.0) Target: x86_64-unknown-freebsd11.0 Thread model: posix InstalledDir: /usr/bin ( cd mbuild/build-base && cmake ../.. && make && ./example ) -- The C compiler identification is Clang 3.8.0 -- The CXX compiler identification is Clang 3.8.0 -- Check for working C compiler: /usr/bin/cc -- Check for working C compiler: /usr/bin/cc -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /usr/bin/c++ -- Check for working CXX compiler: /usr/bin/c++ -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Configuring done CMake Error in CMakeLists.txt: Target "example" requires the language dialect "CXX17" (with compiler extensions), but CMake does not know the compile flags to use to enable it. While on FreeBSD 10.3, the same compiler (roughly .. ports is different from 11.0's base) does work: ### /usr/local/bin/clang++38 ### ### /usr/local/bin/clang++38 --version clang version 3.8.1 (tags/RELEASE_381/final) Target: x86_64-unknown-freebsd10.3 Thread model: posix InstalledDir: /usr/local/llvm38/bin ( cd mbuild/build-38 && cmake ../.. && make && ./example ) -- The C compiler identification is Clang 3.8.1 -- The CXX compiler identification is Clang 3.8.1 -- Check for working C compiler: /usr/local/bin/clang38 -- Check for working C compiler: /usr/local/bin/clang38 -- works -- Detecting C compiler ABI info -- Detecting C compiler ABI info - done -- Detecting C compile features -- Detecting C compile features - done -- Check for working CXX compiler: /usr/local/bin/clang++38 -- Check for working CXX compiler: /usr/local/bin/clang++38 -- works -- Detecting CXX compiler ABI info -- Detecting CXX compiler ABI info - done -- Detecting CXX compile features -- Detecting CXX compile features - done -- Configuring done -- You are receiving this mail because: You are the assignee for the bug.
