Interesting. I had a little typo in the first example, here's another one. You only need a file called "generated.txt.in" next to the CMakeLists.txt file.
CMAKE_MINIMUM_REQUIRED(VERSION 2.8) PROJECT(quick_test) ADD_CUSTOM_COMMAND( OUTPUT "${PROJECT_BINARY_DIR}/generated.txt" COMMAND ${CMAKE_COMMAND} -E copy "${PROJECT_SOURCE_DIR}/generated.txt.in" "${PROJECT_BINARY_DIR}/generated.txt" DEPENDS "${PROJECT_SOURCE_DIR}/generated.txt.in") ADD_CUSTOM_COMMAND( OUTPUT "${PROJECT_BINARY_DIR}/generated_used.stamp" COMMAND ${CMAKE_COMMAND} -E touch "${PROJECT_BINARY_DIR}/generated_used.stamp" DEPENDS "${PROJECT_BINARY_DIR}/generated.txt" COMMENT "Using generated.txt") ADD_CUSTOM_TARGET( ${PROJECT_NAME} DEPENDS "${PROJECT_BINARY_DIR}/generated_used.stamp") This builds ok the first time, but then change the "generated.txt.in" and run the build twice and the second time you'll see "Using generated.txt" again, which I don't want to see. I've tried VS 2008 and NMake, using CMake 2.8 and 2.8.1. ------------------------------------------------------------- Aaron Wright From: Michael Wild <them...@gmail.com> To: aaron_wri...@selinc.com Cc: cmake@cmake.org Date: 04/21/2010 11:41 PM Subject: Re: [CMake] Why is this custom command run twice? Sent by: cmake-boun...@cmake.org On 22. Apr, 2010, at 5:12 , aaron_wri...@selinc.com wrote: > I'm trying to do something a little weird, and I'm almost there but not > quite. I'm trying to generate a file and then run a command based on that > file. I only want the command to run when the file changes and thus the > generated file changes. Instead the first build I get both custom commands > run, and then on a second build, the second custom command runs again, > which is not what I want. > > This is what I got (just an example): > > > ADD_CUSTOM_COMMAND( > OUTPUT "${PROJECT_BINARY_DIR}/generated.txt" > COMMAND ${CMAKE_COMMAND} -E touch "${PROJECT_BINARY_DIR}/generated.txt" > DEPENDS "${PROJECT_SOURCE_DIR}/generated.txt") > > ADD_CUSTOM_COMMAND( > OUTPUT "${PROJECT_BINARY_DIR}/generated_used.stamp" > COMMAND ${CMAKE_COMMAND} -E touch > "${PROJECT_BINARY_DIR}/generated_used.stamp" > DEPENDS "${PROJECT_BINARY_DIR}/generated.txt" > COMMENT "Using generated.txt") > > ADD_CUSTOM_TARGET( > ${PROJECT_NAME} > DEPENDS "${PROJECT_BINARY_DIR}/generated_used.stamp") > > > What I'm I missing? Thanks Your example works fine for me (using CMake 2.8.1 and Unix Makefiles generator on Mac OS X 10.6.2). Michael _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake
_______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the CMake FAQ at: http://www.cmake.org/Wiki/CMake_FAQ Follow this link to subscribe/unsubscribe: http://www.cmake.org/mailman/listinfo/cmake