diff options
Diffstat (limited to 'libbuild2/cxx/init.cxx')
| -rw-r--r-- | libbuild2/cxx/init.cxx | 60 |
1 files changed, 39 insertions, 21 deletions
diff --git a/libbuild2/cxx/init.cxx b/libbuild2/cxx/init.cxx index 3ca920e..3cf330f 100644 --- a/libbuild2/cxx/init.cxx +++ b/libbuild2/cxx/init.cxx @@ -62,8 +62,8 @@ namespace build2 uint64_t mi (ci.version.minor); uint64_t p (ci.version.patch); - // Besides various `c++NN` we have two special values: `latest` and - // `experimental`. + // Besides various `NN` we have two special values: `latest` and + // `experimental`. It can also be `gnu++NN`. // // The semantics of the `latest` value is the latest available standard // that is not necessarily complete or final but is practically usable. @@ -91,6 +91,24 @@ namespace build2 bool latest (v != nullptr && *v == "latest"); bool experimental (v != nullptr && *v == "experimental"); + // This helper helps recognize both NN and [cC]++NN to avoid an endless + // stream of user questions. It can also be used to recognize Nx in + // addition to NN (e.g., "14" and "1y"). + // + auto stdcmp = [v] (const char* nn, const char* nx = nullptr) + { + if (v != nullptr) + { + const char* s (v->c_str ()); + if ((s[0] == 'c' || s[0] == 'C') && s[1] == '+' && s[2] == '+') + s += 3; + + return strcmp (s, nn) == 0 || (nx != nullptr && strcmp (s, nx) == 0); + } + + return false; + }; + // Feature flags. // auto& vp (rs.var_pool (true /* public */)); // All qualified. @@ -205,44 +223,44 @@ namespace build2 } else if (v == nullptr) ; - else if (*v != "98" && *v != "03") + else if (!stdcmp ("98") && !stdcmp ("03")) { bool sup (false); - if (*v == "11") // C++11 since VS2010/10.0. + if (stdcmp ("11", "0x")) // C++11 since VS2010/10.0. { sup = mj >= 16; } - else if (*v == "14") // C++14 since VS2015/14.0. + else if (stdcmp ("14", "1y")) // C++14 since VS2015/14.0. { sup = mj >= 19; } - else if (*v == "17") // C++17 since VS2015/14.0u2. + else if (stdcmp ("17", "1z")) // C++17 since VS2015/14.0u2. { // Note: the VC15 compiler version is 19.10. // sup = (mj > 19 || (mj == 19 && (mi > 0 || (mi == 0 && p >= 23918)))); } - else if (*v == "20") // C++20 since VS2019/16.11. + else if (stdcmp ("20", "2a")) // C++20 since VS2019/16.11. { sup = v16_11; } if (!sup) - fail << "C++" << *v << " is not supported by " << ci.signature << + fail << "C++ " << *v << " is not supported by " << ci.signature << info << "required by " << project (rs) << '@' << rs; if (v15_3) { - if (*v == "20") o = "/std:c++20"; - else if (*v == "17") o = "/std:c++17"; - else if (*v == "14") o = "/std:c++14"; + if (stdcmp ("20", "2a")) o = "/std:c++20"; + else if (stdcmp ("17", "1z")) o = "/std:c++17"; + else if (stdcmp ("14", "1y")) o = "/std:c++14"; } else if (v14_3) { - if (*v == "14") o = "/std:c++14"; - else if (*v == "17") o = "/std:c++latest"; + if (stdcmp ("14", "1y")) o = "/std:c++14"; + else if (stdcmp ("17", "1z")) o = "/std:c++latest"; } } @@ -324,14 +342,14 @@ namespace build2 // o = "-std="; - if (*v == "26") o += "c++2c"; - else if (*v == "23") o += "c++2b"; - else if (*v == "20") o += "c++2a"; - else if (*v == "17") o += "c++1z"; - else if (*v == "14") o += "c++1y"; - else if (*v == "11") o += "c++0x"; - else if (*v == "03") o += "c++03"; - else if (*v == "98") o += "c++98"; + if (stdcmp ("26", "2c")) o += "c++2c"; + else if (stdcmp ("23", "2b")) o += "c++2b"; + else if (stdcmp ("20", "2a")) o += "c++2a"; + else if (stdcmp ("17", "1z")) o += "c++1z"; + else if (stdcmp ("14", "1y")) o += "c++1y"; + else if (stdcmp ("11", "0x")) o += "c++0x"; + else if (stdcmp ("03") ) o += "c++03"; + else if (stdcmp ("98") ) o += "c++98"; else o += *v; // In case the user specifies `gnu++NN` or some such. } |