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cmake: add target_capnp_sources headers target #110

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Merged
ryanofsky merged 1 commit into from
Sep 9, 2024
Merged

cmake: add target_capnp_sources headers target #110

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10 changes: 10 additions & 0 deletions cmake/TargetCapnpSources.cmake
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Original file line number Diff line number Diff line change
Expand Up @@ -64,6 +64,7 @@ function(target_capnp_sources target include_prefix)
message(FATAL_ERROR "Target 'Libmultiprocess::mpgen' does not exist.")
endif()

set(generated_headers "")
foreach(capnp_file IN LISTS TCS_UNPARSED_ARGUMENTS)
add_custom_command(
OUTPUT ${capnp_file}.c++ ${capnp_file}.h ${capnp_file}.proxy-client.c++ ${capnp_file}.proxy-types.h ${capnp_file}.proxy-server.c++ ${capnp_file}.proxy-types.c++ ${capnp_file}.proxy.h
Expand All @@ -77,6 +78,8 @@ function(target_capnp_sources target include_prefix)
${CMAKE_CURRENT_BINARY_DIR}/${capnp_file}.proxy-server.c++
${CMAKE_CURRENT_BINARY_DIR}/${capnp_file}.proxy-types.c++
)

list(APPEND generated_headers ${capnp_file}.h)
endforeach()

# Translate include_prefix from a source path to a binary path and add it as a
Expand All @@ -91,4 +94,11 @@ function(target_capnp_sources target include_prefix)
if(TARGET Libmultiprocess::multiprocess)
target_link_libraries(${target} PRIVATE Libmultiprocess::multiprocess)
endif()

# Add a custom target that can be specified as a dependency of c++ targets
# that include generated headers. It can be necessary to specify these
# dependencies explicitly because while cmake detect dependencies of non
# generated files on generated headers, it does not reliably detect
# dependencies of generated headers on other generated headers.
add_custom_target("${target}_headers" DEPENDS ${generated_headers})
endfunction()