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configure_file: Add support for indented cmakedefine

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Optional spaces and/or tabs are now understood between the '#' character
and the 'cmakedefine'/'cmakedefine01' words. This indentation is
preserved in the output lines.

Fixes: #13037
This commit is contained in:
Sylvain Joubert
2017-07-04 12:00:02 +02:00
parent 74112c8da1
commit 58f4744821
11 changed files with 90 additions and 7 deletions
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Help/command/configure_file.rst
+12
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@@ -30,6 +30,18 @@ a false constant by the :command:`if` command. The "..." content on the
line after the variable name, if any, is processed as above.
Input file lines of the form ``#cmakedefine01 VAR`` will be replaced with
either ``#define VAR 1`` or ``#define VAR 0`` similarly.
The result lines (with the exception of the ``#undef`` comments) can be
indented using spaces and/or tabs between the ``#`` character
and the ``cmakedefine`` or ``cmakedefine01`` words. This whitespace
indentation will be preserved in the output lines::
# cmakedefine VAR
# cmakedefine01 VAR
will be replaced, if ``VAR`` is defined, with::
# define VAR
# define VAR 1
If the input file is modified the build system will re-run CMake to
re-configure the file and generate the build system again.