CMake/Help/release/dev/msvc-warning-flags.rst at ca0ac8f2896fc0de0341dfdbcb1baa67aedea7c1 - CMake - Gitea - ZeroTwo

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Brad King 1baf122cd4 MSVC: Do not add /W3 to CMAKE_<LANG>_FLAGS by default

We do not add default warning flags on other compilers, and having
a warning flag in the default flags makes it hard for projects to
customize the warning level.  They need to use string processing
to remove `/W3` from `CMAKE_{C,CXX}_FLAGS`.  Therefore we should
drop it.

However, projects may be using string processing to replace `/W3`
with another flag, so we cannot simply drop it.  Add a policy to
drop it in a compatible way.

Fixes: #18317

2019-04-19 12:56:49 -04:00

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 msvc-warning-flags
 ------------------
 * With MSVC-like compilers the value of :variable:`CMAKE_<LANG>_FLAGS`
   no longer contains warning flags like ``/W3`` by default.
   See policy :policy:`CMP0092`.