ENABLE_EXPORTSΒΆ
Specify whether an executable or a shared library exports symbols.
Normally an executable does not export any symbols because it is the
final program. It is possible for an executable to export symbols to
be used by loadable modules. When this property is set to true CMake
will allow other targets to "link" to the executable with the
target_link_libraries()
command. On all platforms a target-level
dependency on the executable is created for targets that link to it.
Handling of the executable on the link lines of the loadable modules
varies by platform:
On Windows-based systems (including Cygwin) an "import library" is created along with the executable to list the exported symbols. Loadable modules link to the import library to get the symbols.
On macOS, loadable modules link to the executable itself using the
-bundle_loader
flag.On AIX, a linker "import file" is created along with the executable to list the exported symbols for import when linking other targets. Loadable modules link to the import file to get the symbols.
On other platforms, loadable modules are simply linked without referencing the executable since the dynamic loader will automatically bind symbols when the module is loaded.
This property is initialized by the value of the variable
CMAKE_EXECUTABLE_ENABLE_EXPORTS
if it is set when an executable
target is created.
New in version 3.27: On macOS, to link with a shared library (standard one as well as framework),
a linker import file (e.g. a text-based stubs file, with .tbd
extension)
can be used instead of the shared library itself.
The generation of these linker import files, as well as the consumption, is
controlled by this property. When this property is set to true, CMake will
generate a .tbd
file for each shared library created by
add_library()
command. This allow other targets to use this .tbd
file to link to the library with the target_link_libraries()
command.
Note
For compatibility purpose, this property will be ignored if
XCODE_ATTRIBUTE_GENERATE_TEXT_BASED_STUBS
target property or the
CMAKE_XCODE_ATTRIBUTE_GENERATE_TEXT_BASED_STUBS
variable is set to NO
.
This property is initialized by the value of the variable
CMAKE_SHARED_LIBRARY_ENABLE_EXPORTS
if it is set when a shared
library target is created.