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annotate CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/lib/cmake/CapnProto/CapnProtoMacros.cmake @ 68:5028fdace37b

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planemo upload commit 2e9511a184a1ca667c7be0c6321a36dc4e3d116d
author jpayne
date Tue, 18 Mar 2025 16:23:26 -0400
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jpayne@68 1 # CAPNP_GENERATE_CPP ===========================================================
jpayne@68 2 #
jpayne@68 3 # Example usage:
jpayne@68 4 # find_package(CapnProto)
jpayne@68 5 # capnp_generate_cpp(CAPNP_SRCS CAPNP_HDRS schema.capnp)
jpayne@68 6 # add_executable(foo main.cpp ${CAPNP_SRCS})
jpayne@68 7 # target_link_libraries(foo PRIVATE CapnProto::capnp-rpc)
jpayne@68 8 # target_include_directories(foo PRIVATE ${CMAKE_CURRENT_BINARY_DIR})
jpayne@68 9 #
jpayne@68 10 # If you are not using the RPC features you can use 'CapnProto::capnp' in the
jpayne@68 11 # target_link_libraries call
jpayne@68 12 #
jpayne@68 13 # Configuration variables (optional):
jpayne@68 14 # CAPNPC_OUTPUT_DIR
jpayne@68 15 # Directory to place compiled schema sources (default: CMAKE_CURRENT_BINARY_DIR).
jpayne@68 16 # CAPNPC_IMPORT_DIRS
jpayne@68 17 # List of additional include directories for the schema compiler.
jpayne@68 18 # (CAPNPC_SRC_PREFIX and CAPNP_INCLUDE_DIRECTORY are always included.)
jpayne@68 19 # CAPNPC_SRC_PREFIX
jpayne@68 20 # Schema file source prefix (default: CMAKE_CURRENT_SOURCE_DIR).
jpayne@68 21 # CAPNPC_FLAGS
jpayne@68 22 # Additional flags to pass to the schema compiler.
jpayne@68 23 #
jpayne@68 24 # TODO: convert to cmake_parse_arguments
jpayne@68 25
jpayne@68 26 function(CAPNP_GENERATE_CPP SOURCES HEADERS)
jpayne@68 27 if(NOT ARGN)
jpayne@68 28 message(SEND_ERROR "CAPNP_GENERATE_CPP() called without any source files.")
jpayne@68 29 endif()
jpayne@68 30 set(tool_depends ${EMPTY_STRING})
jpayne@68 31 #Use cmake targets available
jpayne@68 32 if(TARGET capnp_tool)
jpayne@68 33 if(NOT CAPNP_EXECUTABLE)
jpayne@68 34 set(CAPNP_EXECUTABLE $<TARGET_FILE:capnp_tool>)
jpayne@68 35 endif()
jpayne@68 36 if(NOT CAPNPC_CXX_EXECUTABLE)
jpayne@68 37 get_target_property(CAPNPC_CXX_EXECUTABLE capnpc_cpp CAPNPC_CXX_EXECUTABLE)
jpayne@68 38 endif()
jpayne@68 39 if(NOT CAPNP_INCLUDE_DIRECTORY)
jpayne@68 40 get_target_property(CAPNP_INCLUDE_DIRECTORY capnp_tool CAPNP_INCLUDE_DIRECTORY)
jpayne@68 41 endif()
jpayne@68 42 list(APPEND tool_depends capnp_tool capnpc_cpp)
jpayne@68 43 endif()
jpayne@68 44 if(NOT CAPNP_EXECUTABLE)
jpayne@68 45 message(SEND_ERROR "Could not locate capnp executable (CAPNP_EXECUTABLE).")
jpayne@68 46 endif()
jpayne@68 47 if(NOT CAPNPC_CXX_EXECUTABLE)
jpayne@68 48 message(SEND_ERROR "Could not locate capnpc-c++ executable (CAPNPC_CXX_EXECUTABLE).")
jpayne@68 49 endif()
jpayne@68 50 if(NOT CAPNP_INCLUDE_DIRECTORY)
jpayne@68 51 message(SEND_ERROR "Could not locate capnp header files (CAPNP_INCLUDE_DIRECTORY).")
jpayne@68 52 endif()
jpayne@68 53
jpayne@68 54 if(DEFINED CAPNPC_OUTPUT_DIR)
jpayne@68 55 # Prepend a ':' to get the format for the '-o' flag right
jpayne@68 56 set(output_dir ":${CAPNPC_OUTPUT_DIR}")
jpayne@68 57 else()
jpayne@68 58 set(output_dir ":.")
jpayne@68 59 endif()
jpayne@68 60
jpayne@68 61 if(NOT DEFINED CAPNPC_SRC_PREFIX)
jpayne@68 62 set(CAPNPC_SRC_PREFIX "${CMAKE_CURRENT_SOURCE_DIR}")
jpayne@68 63 endif()
jpayne@68 64 get_filename_component(CAPNPC_SRC_PREFIX "${CAPNPC_SRC_PREFIX}" ABSOLUTE)
jpayne@68 65
jpayne@68 66 # Default compiler includes. Note that in capnp's own test usage of capnp_generate_cpp(), these
jpayne@68 67 # two variables will end up evaluating to the same directory. However, it's difficult to
jpayne@68 68 # deduplicate them because if CAPNP_INCLUDE_DIRECTORY came from the capnp_tool target property,
jpayne@68 69 # then it must be a generator expression in order to handle usages in both the build tree and the
jpayne@68 70 # install tree. This vastly overcomplicates duplication detection, so the duplication doesn't seem
jpayne@68 71 # worth fixing.
jpayne@68 72 set(include_path -I "${CAPNPC_SRC_PREFIX}" -I "${CAPNP_INCLUDE_DIRECTORY}")
jpayne@68 73
jpayne@68 74 if(DEFINED CAPNPC_IMPORT_DIRS)
jpayne@68 75 # Append each directory as a series of '-I' flags in ${include_path}
jpayne@68 76 foreach(directory ${CAPNPC_IMPORT_DIRS})
jpayne@68 77 get_filename_component(absolute_path "${directory}" ABSOLUTE)
jpayne@68 78 list(APPEND include_path -I "${absolute_path}")
jpayne@68 79 endforeach()
jpayne@68 80 endif()
jpayne@68 81
jpayne@68 82 set(${SOURCES})
jpayne@68 83 set(${HEADERS})
jpayne@68 84 foreach(schema_file ${ARGN})
jpayne@68 85 get_filename_component(file_path "${schema_file}" ABSOLUTE)
jpayne@68 86 get_filename_component(file_dir "${file_path}" PATH)
jpayne@68 87 if(NOT EXISTS "${file_path}")
jpayne@68 88 message(FATAL_ERROR "Cap'n Proto schema file '${file_path}' does not exist!")
jpayne@68 89 endif()
jpayne@68 90
jpayne@68 91 # Figure out where the output files will go
jpayne@68 92 if (NOT DEFINED CAPNPC_OUTPUT_DIR)
jpayne@68 93 set(CAPNPC_OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/")
jpayne@68 94 endif()
jpayne@68 95 # Output files are placed in CAPNPC_OUTPUT_DIR, at a location as if they were
jpayne@68 96 # relative to CAPNPC_SRC_PREFIX.
jpayne@68 97 string(LENGTH "${CAPNPC_SRC_PREFIX}" prefix_len)
jpayne@68 98 string(SUBSTRING "${file_path}" 0 ${prefix_len} output_prefix)
jpayne@68 99 if(NOT "${CAPNPC_SRC_PREFIX}" STREQUAL "${output_prefix}")
jpayne@68 100 message(SEND_ERROR "Could not determine output path for '${schema_file}' ('${file_path}') with source prefix '${CAPNPC_SRC_PREFIX}' into '${CAPNPC_OUTPUT_DIR}'.")
jpayne@68 101 endif()
jpayne@68 102
jpayne@68 103 string(SUBSTRING "${file_path}" ${prefix_len} -1 output_path)
jpayne@68 104 set(output_base "${CAPNPC_OUTPUT_DIR}${output_path}")
jpayne@68 105
jpayne@68 106 add_custom_command(
jpayne@68 107 OUTPUT "${output_base}.c++" "${output_base}.h"
jpayne@68 108 COMMAND "${CAPNP_EXECUTABLE}"
jpayne@68 109 ARGS compile
jpayne@68 110 -o ${CAPNPC_CXX_EXECUTABLE}${output_dir}
jpayne@68 111 --src-prefix ${CAPNPC_SRC_PREFIX}
jpayne@68 112 ${include_path}
jpayne@68 113 ${CAPNPC_FLAGS}
jpayne@68 114 ${file_path}
jpayne@68 115 DEPENDS "${schema_file}" ${tool_depends}
jpayne@68 116 COMMENT "Compiling Cap'n Proto schema ${schema_file}"
jpayne@68 117 VERBATIM
jpayne@68 118 )
jpayne@68 119
jpayne@68 120 list(APPEND ${SOURCES} "${output_base}.c++")
jpayne@68 121 list(APPEND ${HEADERS} "${output_base}.h")
jpayne@68 122 endforeach()
jpayne@68 123
jpayne@68 124 set_source_files_properties(${${SOURCES}} ${${HEADERS}} PROPERTIES GENERATED TRUE)
jpayne@68 125 set(${SOURCES} ${${SOURCES}} PARENT_SCOPE)
jpayne@68 126 set(${HEADERS} ${${HEADERS}} PARENT_SCOPE)
jpayne@68 127 endfunction()