Am Montag, den 25.07.2011, 15:49 +0200 schrieb Michael Wild: > On 07/25/2011 03:24 PM, Micha Renner wrote: > > There is following sequence: > > > > ADD_EXECUTEABLE(generator gen.c) > > > > ADD_CUSTOM_COMMAND(OUTPUT tlib.h > > COMMAND generator > tlib.h) > > > > ADD_LIBRARY(tlib tlib.c tlib.h) > > > > The question: Is it sure that ADD_EXECUTEABLE is invoked before the > > library is build or is here an ADD_DEPENDENCIES(tlib generator) > > necessary? > > > > Greetings > > > > Micha > > > > Yes, CMake should recognize that "generator" is a target and create the > dependency of tlib.h on "generator" automagically. And since it knows > that tlib.h is GENERATED, it will also add a dependency of tlib on > tlib.h. If you want to make really sure that CMake understands that > "generator" is a target, use generator expressions, like > "$<TARGET_FILE:generator>", but that works only since 2.8.4.
So really clear is this not. After studying the documentation, to get more information for target_file, I found this line in the add_custom_command documentation: "Additionally, if the target is an executable or library a file-level dependency is created to cause the custom command to re-run whenever the target is recompiled." ADD_CUSTOM_COMMAND(OUTPUT tlib.h COMMAND generator > tlib.h DEPENDS generator) should solve my problem. But what is the difference to ADD_CUSTOM_COMMAND(OUTPUT tlib.h COMMAND $<TARGET_FILE:generator> generator > tlib.h)? Greetings Micha _______________________________________________ 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
