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Help: Explicitly state that some file generations are lazy

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Fixes: #16856
This commit is contained in:
Sylvain Joubert
2017-07-04 13:10:19 +02:00
parent 2ef3527dfe
commit c7d81e16cb
2 changed files with 4 additions and 2 deletions
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2
Help/command/configure_file.rst
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@@ -33,6 +33,8 @@ either ``#define VAR 1`` or ``#define VAR 0`` similarly.
If the input file is modified the build system will re-run CMake to If the input file is modified the build system will re-run CMake to
re-configure the file and generate the build system again. re-configure the file and generate the build system again.
The generated file is modified and its timestamp updated on subsequent
cmake runs only if its content is changed.
The arguments are: The arguments are:

4
Help/command/file.rst
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@@ -306,8 +306,8 @@ from the input content to produce the output content. The options are:
Exactly one ``CONTENT`` or ``INPUT`` option must be given. A specific Exactly one ``CONTENT`` or ``INPUT`` option must be given. A specific
``OUTPUT`` file may be named by at most one invocation of ``file(GENERATE)``. ``OUTPUT`` file may be named by at most one invocation of ``file(GENERATE)``.
Generated files are modified on subsequent cmake runs only if their content Generated files are modified and their timestamp updated on subsequent cmake
is changed. runs only if their content is changed.
Note also that ``file(GENERATE)`` does not create the output file until the Note also that ``file(GENERATE)`` does not create the output file until the
generation phase. The output file will not yet have been written when the generation phase. The output file will not yet have been written when the