CMake/Tests/RunCMake/add_custom_command/generate-once.cmake at ea67dbc4cd3cf4d8c02ba4099b4e9600ef93b708 - CMake - Gitea - ZeroTwo

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Fujii Hironori f59c33a763 VS: Generate a custom command only in the least dependent target

If a custom command is assigned to multiple targets, generate the build
rule only in the least-dependent `.vcxproj` file.  Otherwise MSBuild
will run the command on the first build of a dependent target even if
its dependencies already brought the command up to date (in order to
populates its build log).

Generate targets in least-to-most-dependent order, and assign a custom
command to the least dependent target.

Added cmLocalVisualStudio10Generator::GenerateTargetsDepthFirst to call
cmVisualStudio10TargetGenerator::Generate in least-dependent order.

Moved SourcesVisited from cmVisualStudio10TargetGenerator to
cmLocalVisualStudio10Generator to avoid attaching a custom command to
multiple targets among the local generator.

Fixes: #16767

2018-04-23 13:31:28 +09:00

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 if (${CMAKE_ARGC} LESS 4)
   message(FATAL_ERROR "Too few arguments")
 endif()
 set(output "${CMAKE_ARGV3}")
 if(EXISTS ${output})
   message(FATAL_ERROR "${output} already exists")
 endif()
 file(WRITE ${output} "int main() { return 0; }\n")