34 lines
1.4 KiB
ReStructuredText
34 lines
1.4 KiB
ReStructuredText
macro
|
|
-----
|
|
|
|
Start recording a macro for later invocation as a command.
|
|
|
|
::
|
|
|
|
macro(<name> [arg1 [arg2 [arg3 ...]]])
|
|
COMMAND1(ARGS ...)
|
|
COMMAND2(ARGS ...)
|
|
...
|
|
endmacro(<name>)
|
|
|
|
Define a macro named <name> that takes arguments named arg1 arg2 arg3
|
|
(...). Commands listed after macro, but before the matching endmacro,
|
|
are not invoked until the macro is invoked. When it is invoked, the
|
|
commands recorded in the macro are first modified by replacing formal
|
|
parameters (${arg1}) with the arguments passed, and then invoked as
|
|
normal commands. In addition to referencing the formal parameters you
|
|
can reference the values ${ARGC} which will be set to the number of
|
|
arguments passed into the function as well as ${ARGV0} ${ARGV1}
|
|
${ARGV2} ... which will have the actual values of the arguments
|
|
passed in. This facilitates creating macros with optional arguments.
|
|
Additionally ${ARGV} holds the list of all arguments given to the
|
|
macro and ${ARGN} holds the list of arguments past the last expected
|
|
argument. Note that the parameters to a macro and values such as ARGN
|
|
are not variables in the usual CMake sense. They are string
|
|
replacements much like the C preprocessor would do with a macro. If
|
|
you want true CMake variables and/or better CMake scope control you
|
|
should look at the function command.
|
|
|
|
See the cmake_policy() command documentation for the behavior of
|
|
policies inside macros.
|