1# A rule for self contained header file targets. 2# This rule merely copies the header file from the current source directory to 3# the current binary directory. 4# Usage: 5# add_header( 6# <target name> 7# HDR <header file> 8# ) 9function(add_header target_name) 10 cmake_parse_arguments( 11 "ADD_HEADER" 12 "" # No optional arguments 13 "HDR;DEST_HDR" # Single value arguments 14 "DEPENDS" 15 ${ARGN} 16 ) 17 if(NOT ADD_HEADER_HDR) 18 message(FATAL_ERROR "'add_header' rules requires the HDR argument specifying a headef file.") 19 endif() 20 21 if(ADD_HEADER_DEST_HDR) 22 set(dest_leaf_filename ${ADD_HEADER_DEST_HDR}) 23 else() 24 set(dest_leaf_filename ${ADD_HEADER_HDR}) 25 endif() 26 set(absolute_path ${CMAKE_CURRENT_SOURCE_DIR}/${dest_leaf_filename}) 27 file(RELATIVE_PATH relative_path ${LIBC_INCLUDE_SOURCE_DIR} ${absolute_path}) 28 set(dest_file ${LIBC_INCLUDE_DIR}/${relative_path}) 29 set(src_file ${CMAKE_CURRENT_SOURCE_DIR}/${ADD_HEADER_HDR}) 30 31 add_custom_command( 32 OUTPUT ${dest_file} 33 COMMAND ${CMAKE_COMMAND} -E copy_if_different ${src_file} ${dest_file} 34 DEPENDS ${src_file} 35 ) 36 37 get_fq_target_name(${target_name} fq_target_name) 38 set(copied_hdr_target ${fq_target_name}.__copied_hdr__) 39 add_custom_target( 40 ${copied_hdr_target} 41 DEPENDS ${dest_file} 42 ) 43 44 if(ADD_HEADER_DEPENDS) 45 get_fq_deps_list(fq_deps_list ${ADD_HEADER_DEPENDS}) 46 # Dependencies of a add_header target can only be another add_header target 47 # or an add_gen_header target. 48 foreach(dep IN LISTS fq_deps_list) 49 get_target_property(header_file ${dep} HEADER_FILE_PATH) 50 if(NOT header_file) 51 message(FATAL_ERROR "Invalid dependency '${dep}' for '${fq_target_name}'.") 52 endif() 53 endforeach() 54 add_dependencies( 55 ${copied_hdr_target} ${fq_deps_list} 56 ) 57 endif() 58 59 add_header_library( 60 ${target_name} 61 HDRS 62 ${dest_file} 63 DEPENDS 64 ${copied_hdr_target} 65 ) 66 set_target_properties( 67 ${fq_target_name} 68 PROPERTIES 69 HEADER_NAME ${dest_leaf_filename} 70 HEADER_FILE_PATH ${dest_file} 71 DEPS "${fq_deps_list}" 72 ) 73endfunction(add_header) 74 75function(add_gen_header target_name) 76 cmake_parse_arguments( 77 "ADD_GEN_HDR" 78 "PUBLIC" # No optional arguments 79 "YAML_FILE;GEN_HDR" # Single value arguments 80 "DEPENDS" # Multi value arguments 81 ${ARGN} 82 ) 83 get_fq_target_name(${target_name} fq_target_name) 84 if(NOT LLVM_LIBC_FULL_BUILD) 85 add_library(${fq_target_name} INTERFACE) 86 return() 87 endif() 88 if(NOT ADD_GEN_HDR_GEN_HDR) 89 message(FATAL_ERROR "`add_gen_hdr` rule requires GEN_HDR to be specified.") 90 endif() 91 if(NOT ADD_GEN_HDR_YAML_FILE) 92 message(FATAL_ERROR "`add_gen_hdr` rule requires YAML_FILE to be specified.") 93 endif() 94 95 set(absolute_path ${CMAKE_CURRENT_SOURCE_DIR}/${ADD_GEN_HDR_GEN_HDR}) 96 file(RELATIVE_PATH relative_path ${LIBC_INCLUDE_SOURCE_DIR} ${absolute_path}) 97 set(out_file ${LIBC_INCLUDE_DIR}/${relative_path}) 98 set(dep_file "${out_file}.d") 99 set(yaml_file ${CMAKE_SOURCE_DIR}/${ADD_GEN_HDR_YAML_FILE}) 100 101 set(fq_data_files "") 102 if(ADD_GEN_HDR_DATA_FILES) 103 foreach(data_file IN LISTS ADD_GEN_HDR_DATA_FILES) 104 list(APPEND fq_data_files "${CMAKE_CURRENT_SOURCE_DIR}/${data_file}") 105 endforeach(data_file) 106 endif() 107 108 set(entry_points "${TARGET_ENTRYPOINT_NAME_LIST}") 109 list(TRANSFORM entry_points PREPEND "--entry-point=") 110 111 add_custom_command( 112 OUTPUT ${out_file} 113 WORKING_DIRECTORY ${CMAKE_BINARY_DIR} 114 COMMAND ${Python3_EXECUTABLE} "${LIBC_SOURCE_DIR}/utils/hdrgen/main.py" 115 --output ${out_file} 116 --depfile ${dep_file} 117 --write-if-changed 118 ${entry_points} 119 ${yaml_file} 120 DEPENDS ${yaml_file} ${fq_data_files} 121 DEPFILE ${dep_file} 122 COMMENT "Generating header ${ADD_GEN_HDR_GEN_HDR} from ${yaml_file}" 123 ) 124 if(LIBC_TARGET_OS_IS_GPU) 125 file(MAKE_DIRECTORY ${LIBC_INCLUDE_DIR}/llvm-libc-decls) 126 file(MAKE_DIRECTORY ${LIBC_INCLUDE_DIR}/llvm-libc-decls/gpu) 127 set(decl_out_file ${LIBC_INCLUDE_DIR}/llvm-libc-decls/${relative_path}) 128 add_custom_command( 129 OUTPUT ${decl_out_file} 130 COMMAND ${Python3_EXECUTABLE} "${LIBC_SOURCE_DIR}/utils/hdrgen/yaml_to_classes.py" 131 ${yaml_file} 132 --export-decls 133 ${entry_points} 134 --output_dir ${decl_out_file} 135 WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} 136 DEPENDS ${yaml_file} ${fq_data_files} 137 ) 138 endif() 139 140 if(ADD_GEN_HDR_DEPENDS) 141 get_fq_deps_list(fq_deps_list ${ADD_GEN_HDR_DEPENDS}) 142 # Dependencies of a add_header target can only be another add_gen_header target 143 # or an add_header target. 144 foreach(dep IN LISTS fq_deps_list) 145 get_target_property(header_file ${dep} HEADER_FILE_PATH) 146 if(NOT header_file) 147 message(FATAL_ERROR "Invalid dependency '${dep}' for '${fq_target_name}'.") 148 endif() 149 endforeach() 150 endif() 151 set(generated_hdr_target ${fq_target_name}.__generated_hdr__) 152 add_custom_target( 153 ${generated_hdr_target} 154 DEPENDS ${out_file} ${fq_deps_list} ${decl_out_file} 155 ) 156 157 add_header_library( 158 ${target_name} 159 HDRS 160 ${out_file} 161 ) 162 163 add_dependencies(${fq_target_name} ${generated_hdr_target}) 164 165 set_target_properties( 166 ${fq_target_name} 167 PROPERTIES 168 HEADER_NAME ${ADD_GEN_HDR_GEN_HDR} 169 HEADER_FILE_PATH ${out_file} 170 DECLS_FILE_PATH "${decl_out_file}" 171 DEPS "${fq_deps_list}" 172 ) 173 174 175endfunction(add_gen_header) 176