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cmake: Allow CMAKE_INSTALL_PREFIX to be set by environment variable

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Fixes: #25023
This commit is contained in:
Silvio Traversaro
2024-01-29 20:32:31 +01:00
committed by Brad King
parent b0d8b857d8
commit 06af18b9db
13 changed files with 73 additions and 14 deletions
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15
Help/variable/CMAKE_INSTALL_PREFIX.rst
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@@ -4,8 +4,19 @@ CMAKE_INSTALL_PREFIX
Install directory used by :command:`install`.
If ``make install`` is invoked or ``INSTALL`` is built, this directory is
prepended onto all install directories. This variable defaults to
``/usr/local`` on UNIX and ``c:/Program Files/${PROJECT_NAME}`` on Windows.
prepended onto all install directories.
This variable defaults as follows:
* .. versionadded:: 3.29
If the :envvar:`CMAKE_INSTALL_PREFIX` environment variable is set,
its value is used as default for this variable.
* ``c:/Program Files/${PROJECT_NAME}`` on Windows.
* ``/usr/local`` on UNIX platforms.
See :variable:`CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT` for how a
project might choose its own default.

7
Help/variable/CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT.rst
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@@ -5,9 +5,10 @@ CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT
CMake sets this variable to a ``TRUE`` value when the
:variable:`CMAKE_INSTALL_PREFIX` has just been initialized to
its default value, typically on the first run of CMake within
a new build tree. This can be used by project code to change
the default without overriding a user-provided value:
its default value, typically on the first
run of CMake within a new build tree and the :envvar:`CMAKE_INSTALL_PREFIX`
environment variable is not set on the first run of CMake. This can be used
by project code to change the default without overriding a user-provided value:
.. code-block:: cmake