[CMake] CUSTOM COMMAND triggered several times
Arnaud Devalkeneer
adevalkeneer at gmail.com
Tue Aug 18 06:47:24 EDT 2009
Hi,
I have a strange behaviour with add_custom_comand with its output form.
This command is called two or three times, even the file dependency has not
been changed and the output exists.
I wrote :
ADD_CUSTOM_COMMAND(
OUTPUT ${${PROJECT_NAME}_WOK_GENERATED_INCLUDE}
COMMAND woktcl ARGS ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.tcl
DEPENDS ${${PROJECT_NAME}_CDLS}
COMMENT "Generating ${PROJECT_NAME} include files from CDLs"
)
ADD_LIBRARY(${PROJECT_NAME} SHARED
${${PROJECT_NAME}_SRCS}
${${PROJECT_NAME}_WOK_GENERATED_INCLUDE}
The problem is :
when I update a cdl file involved in the list ${${PROJECT_NAME}_CDLS}, the
custom command is triggered several times.
And when I re-do a make, this is triggered again regardless the fact that I
do not change the cdl file again.
So I wonder what the easiest way is in cmake to trigger ONCE a command if
cmake detects that a list of OUTPUT does not exists and/or detects a change
in the DEPEND list.
And to be sure that otherwise the custom command is not called.
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