diff options
Diffstat (limited to 'Help/command/file.rst')
| -rw-r--r-- | Help/command/file.rst | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/Help/command/file.rst b/Help/command/file.rst index 5ce86e5..43ce3d9 100644 --- a/Help/command/file.rst +++ b/Help/command/file.rst @@ -98,10 +98,10 @@ command. :: file(GLOB <variable> - [LIST_DIRECTORIES true|false] [RELATIVE <path>] + [LIST_DIRECTORIES true|false] [RELATIVE <path>] [CONFIGURE_DEPENDS] [<globbing-expressions>...]) file(GLOB_RECURSE <variable> [FOLLOW_SYMLINKS] - [LIST_DIRECTORIES true|false] [RELATIVE <path>] + [LIST_DIRECTORIES true|false] [RELATIVE <path>] [CONFIGURE_DEPENDS] [<globbing-expressions>...]) Generate a list of files that match the ``<globbing-expressions>`` and @@ -110,6 +110,11 @@ regular expressions, but much simpler. If ``RELATIVE`` flag is specified, the results will be returned as relative paths to the given path. The results will be ordered lexicographically. +If the ``CONFIGURE_DEPENDS`` flag is specified, CMake will add logic +to the main build system check target to rerun the flagged ``GLOB`` commands +at build time. If any of the outputs change, CMake will regenerate the build +system. + By default ``GLOB`` lists directories - directories are omitted in result if ``LIST_DIRECTORIES`` is set to false. @@ -118,6 +123,10 @@ By default ``GLOB`` lists directories - directories are omitted in result if your source tree. If no CMakeLists.txt file changes when a source is added or removed then the generated build system cannot know when to ask CMake to regenerate. + The ``CONFIGURE_DEPENDS`` flag may not work reliably on all generators, or if + a new generator is added in the future that cannot support it, projects using + it will be stuck. Even if ``CONFIGURE_DEPENDS`` works reliably, there is + still a cost to perform the check on every rebuild. Examples of globbing expressions include:: @@ -285,6 +294,23 @@ If neither ``TLS`` option is given CMake will check variables :: + file(TOUCH [<files>...]) + file(TOUCH_NOCREATE [<files>...]) + +Create a file with no content if it does not yet exist. If the file already +exists, its access and/or modification will be updated to the time when the +function call is executed. + +Use TOUCH_NOCREATE to touch a file if it exists but not create it. If a file +does not exist it will be silently ignored. + +With TOUCH and TOUCH_NOCREATE the contents of an existing file will not be +modified. + +------------------------------------------------------------------------------ + +:: + file(TIMESTAMP <filename> <variable> [<format>] [UTC]) Compute a string representation of the modification time of ``<filename>`` |