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Help: Document CMAKE_OSX_SYSROOT default change in 4.0

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In commit 7b19531291 (macOS: Do not pass any SDK/-isysroot to compilers
by default, 2024-11-06, v4.0.0-rc1~511^2) we forgot to update the
documentation of `CMAKE_OSX_SYSROOT`.

Fixes: #26846
This commit is contained in:
Brad King
2025-04-08 10:52:28 -04:00
parent f21682cf1a
commit 2164da0ae6
2 changed files with 10 additions and 5 deletions
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4
Help/release/4.0.rst
View File

@@ -232,8 +232,8 @@ Other Changes
* Builds targeting macOS no longer choose any SDK or pass an ``-isysroot``
flag to the compiler by default. Instead, compilers are expected to
choose a default macOS SDK on their own. In order to use a compiler that
does not do this, users must now specify ``-DCMAKE_OSX_SYSROOT=macosx``
when configuring their build.
does not do this, users must now specify :variable:`CMAKE_OSX_SYSROOT`
when configuring their build, e.g., ``-DCMAKE_OSX_SYSROOT=macosx``.
* On AIX, ``SHARED`` library targets now produce a shared library archive
by default. See policy :policy:`CMP0182`.

11
Help/variable/CMAKE_OSX_SYSROOT.rst
View File

@@ -6,8 +6,13 @@ CMake uses this value to compute the value of the ``-isysroot`` flag
or equivalent and to help the ``find_*`` commands locate files in
the SDK.
If not set explicitly the value is initialized by the ``SDKROOT``
environment variable, if set, and otherwise computed based on the
:variable:`CMAKE_OSX_DEPLOYMENT_TARGET` or the host platform.
If not set explicitly, the value is initialized by the ``SDKROOT``
environment variable, if set. Otherwise, the value defaults to empty,
so no explicit ``-isysroot`` flag is passed, and the compiler's default
sysroot is used.
.. versionchanged:: 4.0
The default is now empty. Previously a default was computed based on
the :variable:`CMAKE_OSX_DEPLOYMENT_TARGET` or the host platform.
.. include:: CMAKE_OSX_VARIABLE.txt