diff options
Diffstat (limited to 'libbuild2/cxx/init.cxx')
| -rw-r--r-- | libbuild2/cxx/init.cxx | 29 |
1 files changed, 24 insertions, 5 deletions
diff --git a/libbuild2/cxx/init.cxx b/libbuild2/cxx/init.cxx index a886cbc..4c4f6ad 100644 --- a/libbuild2/cxx/init.cxx +++ b/libbuild2/cxx/init.cxx @@ -39,6 +39,7 @@ namespace build2 virtual strings translate_std (const compiler_info&, + const target_triplet&, scope&, const string*) const override; }; @@ -46,7 +47,10 @@ namespace build2 using cc::module; strings config_module:: - translate_std (const compiler_info& ci, scope& rs, const string* v) const + translate_std (const compiler_info& ci, + const target_triplet& tt, + scope& rs, + const string* v) const { strings r; @@ -63,9 +67,9 @@ namespace build2 // that is not necessarily complete or final but is practically usable. // In other words, a project that uses this value and does not rely on // any unstable/bleeding edge parts of the standard (or takes care to - // deal with them, for example, using feature test macros), can - // reasonably expect to work. In particular, this is the value we use by - // default in projects created by bdep-new(1) as well as to build the + // deal with them, for example, using feature test macros), can be + // reasonably expected to work. In particular, this is the value we use + // by default in projects created by bdep-new(1) as well as to build the // build2 toolchain itself. // // The `experimental` value, as the name suggests, is the latest @@ -199,7 +203,22 @@ namespace build2 } case compiler_type::clang: { - if (mj >= 5) o = "-std=c++2a"; + // Clang 10.0.0 targeting MSVC 16.4 and 16.5 (preview) in the + // c++2a mode uncovers some Concepts-related bugs in MSVC + // (LLVM bug #44956). So in this case we for now map `latest` + // to c++17. @@ TMP + // + // Note that if 10.0.0 is released without a workaround, then + // we will need to carry this forward at least for 16.4 since + // this version is unlikely to ever be fixed. Which means we + // will somehow need to pass the version of MSVC Clang is + // targeting. + // + if (latest && mj == 10 && tt.system == "win32-msvc") + { + o = "-std=c++17"; + } + else if (mj >= 5) o = "-std=c++2a"; else if (mj > 3 || (mj == 3 && mi >= 5)) o = "-std=c++1z"; else if (mj == 3 && mi >= 4) o = "-std=c++1y"; else /* ??? */ o = "-std=c++0x"; |