Use source file from CMake ExternalProject as dependency of target

Question

I have an external project that provides source files that I want to use to build an executable. I currently have something like the below:

ExternalProject(myproj)

add_executable(myexecutable source.c) # source.c is provided by myproj
add_depedencies(myexecutable myproj)

It errors and complains that it can't find source.c because it hasn't downloaded the external project yet. Is there a way to tell CMake that source.c comes from the external project?

Justin Buchanan · Accepted Answer · 2014-11-10 10:30:46Z

1

I found a solution. Using add_custom_command I can tell CMake to get the external project first.

add_custom_command(OUTPUT source.c DEPENDS myproj COMMAND "")

edited Nov 10, 2014 at 10:30

user2288008

answered Nov 10, 2014 at 5:54

Justin Buchanan

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Fenjin Wang · Accepted Answer · 2022-07-15 03:13:42Z

0

From https://stackoverflow.com/a/59794921/1203241

set_source_files_properties(source.c PROPERTIES GENERATED TRUE)

answered Jul 15, 2022 at 3:13

Fenjin Wang

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