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authorBrad King <brad.king@kitware.com>2020-04-06 13:57:01 (GMT)
committerBrad King <brad.king@kitware.com>2020-04-06 13:57:01 (GMT)
commitdd31068bf078f6305b0670dbfbcdd598668e07f2 (patch)
treebfaedaa1b5fe480554926fd1d9148a77e274550f /Help
parent3f1cd5518051fab01976a3340d5ec507e3ab06ae (diff)
parent182a104478779922910207d544c441ebf357c543 (diff)
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Merge branch 'doc-3.15-std-fix' into release-3.16
Merge-request: !4574
Diffstat (limited to 'Help')
-rw-r--r--Help/release/3.15.rst9
1 files changed, 9 insertions, 0 deletions
diff --git a/Help/release/3.15.rst b/Help/release/3.15.rst
index 957e6e9..e68e7d3 100644
--- a/Help/release/3.15.rst
+++ b/Help/release/3.15.rst
@@ -332,6 +332,15 @@ Deprecated and Removed Features
Other Changes
=============
+* If a feature specified by :command:`target_compile_features` is available
+ in the compiler's default standard level, CMake 3.14 and below incorrectly
+ added unnecessary ``-std=`` flags that could lower the standard level.
+ This bug has been fixed in CMake 3.15. This behavior change may expose
+ bugs in existing projects that were relying on undocumented implementation
+ details. Specifying compile features only ensures that the compiler runs
+ in a mode that has those features, not that any specific standard level is
+ used or explicit ``-std=`` flag passed.
+
* CMake learned how to compile C++14 with the IBM AIX XL compiler
and the SunPro compiler and to compile C++20 with the AppleClang compiler.