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authorBoris Kolpackov <boris@codesynthesis.com>2021-10-14 13:24:59 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2021-10-14 13:27:57 +0200
commitc050db1d2f88196002ecb882c8a9f1d7eeb4848e (patch)
tree438a2836469bb4d094ce8ae0fe2312a50ed160d5
parentd267e350e3fb8571805f6d8eba9c0d7f41bf75c2 (diff)
Map latest to -std=c++2b from Clang 13, /std:c++20 from MSVC 16.11
-rw-r--r--libbuild2/cxx/init.cxx33
1 files changed, 16 insertions, 17 deletions
diff --git a/libbuild2/cxx/init.cxx b/libbuild2/cxx/init.cxx
index a2c9f25..cd5169d 100644
--- a/libbuild2/cxx/init.cxx
+++ b/libbuild2/cxx/init.cxx
@@ -164,10 +164,12 @@ namespace build2
// C++ standard-wise, with VC you got what you got up until 14.2.
// Starting with 14.3 there is now the /std: switch which defaults
// to c++14 but can be set to c++latest. And from 15.3 it can be
- // c++17. And from 16.?? it can be c++20.
+ // c++17. And from 16.11 it can be c++20 (we start with the compiler
+ // version for 16.11.4 since 16.11.0 seems to be indistinguishable
+ // from 16.10).
//
- bool v16_10 (false /* mj > 19 || (mj == 19 && mi >= 29) */);
- bool v16_0 (v16_10 || mj > 19 || (mj == 19 && mi >= 20));
+ bool v16_11 ( mj > 19 || (mj == 19 && (mi > 29 || (mi == 29 && p >= 30136))));
+ bool v16_0 (v16_11 || (mj == 19 && mi >= 20));
bool v15_3 (v16_0 || (mj == 19 && mi >= 11));
bool v14_3 (v15_3 || (mj == 19 && (mi > 0 || (mi == 0 && p >= 24215))));
@@ -192,7 +194,7 @@ namespace build2
// for this mode. So starting from 16 we only enable it in
// `experimental`.
//
- if (v16_10)
+ if (v16_11)
o = "/std:c++20";
else if (v16_0)
o = "/std:c++17";
@@ -220,12 +222,10 @@ namespace build2
sup = (mj > 19 ||
(mj == 19 && (mi > 0 || (mi == 0 && p >= 23918))));
}
- /*
- else if (*v == "20") // C++20 since VS2019/16.??.
+ else if (*v == "20") // C++20 since VS2019/16.11.
{
- sup = (mj > 19 || (mj == 19 && mi >= 29));
+ sup = v16_11;
}
- */
if (!sup)
fail << "C++" << *v << " is not supported by " << ci.signature <<
@@ -289,15 +289,14 @@ namespace build2
// and later are used with a sufficiently new version of
// MSVC.
//
- if (mj == 10 && latest && tt.system == "win32-msvc")
- {
- o = "-std=c++17";
- }
- //else if (mj >= 13) o = "-std=c++2b";
- 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";
+
+ if (mj >= 13) o = "-std=c++2b";
+ else if (mj == 10 &&
+ latest && 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";
break;
}