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| author | Boris Kolpackov <boris@codesynthesis.com> | 2021-01-14 14:31:27 +0200 |
|---|---|---|
| committer | Boris Kolpackov <boris@codesynthesis.com> | 2021-01-14 14:31:27 +0200 |
| commit | 8345d5eba80a11de363c8a96070316fdd6b6fd22 (patch) | |
| tree | 933d2537c7545c3e28c75ce60a108bcfa7ccfd37 /libbuild2/cxx/init.cxx | |
| parent | f91dcce80beb48bf8b444b472f4820a4ff2b33e5 (diff) | |
Pass /Zc:__cplusplus by default starting from VC 15.7 (GitHub issue #107)
This can be overridden by passing a variant of this option as part of the
compiler mode options.
Diffstat (limited to 'libbuild2/cxx/init.cxx')
| -rw-r--r-- | libbuild2/cxx/init.cxx | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/libbuild2/cxx/init.cxx b/libbuild2/cxx/init.cxx index ad0dd05..e2d7343 100644 --- a/libbuild2/cxx/init.cxx +++ b/libbuild2/cxx/init.cxx @@ -189,6 +189,17 @@ namespace build2 if (!o.empty ()) prepend (move (o)); + // Since VC 15.7 we can get a (more) accurate __cplusplus value if + // we ask for it with /Zc:__cplusplus: + // + // https://devblogs.microsoft.com/cppblog/msvc-now-correctly-reports-__cplusplus/ + // + if (mj > 19 || (mj == 19 && mi >= 14)) + { + if (!find_option_prefix ("/Zc:__cplusplus", mode)) + prepend ("/Zc:__cplusplus"); + } + break; } case compiler_class::gcc: |