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Meta: Add the start of a gn build based on the LLVM gn build
"based on" in this context means "largely copied from"
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161
Meta/gn/build/toolchain/BUILD.gn
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161
Meta/gn/build/toolchain/BUILD.gn
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unix_copy_command = "ln -f {{source}} {{output}} 2>/dev/null || (rm -rf {{output}} && cp -af {{source}} {{output}})"
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template("unix_toolchain") {
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toolchain(target_name) {
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ar = "ar"
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cc = "cc"
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cxx = "c++"
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ld = cxx
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forward_variables_from(invoker.toolchain_args, "*")
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forward_variables_from(invoker, "*")
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tool("cc") {
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depfile = "{{output}}.d"
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command = "$cc -MMD -MF $depfile -o {{output}} -c {{source}} {{defines}} {{include_dirs}} {{cflags}} {{cflags_c}}"
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depsformat = "gcc"
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description = "CC {{output}}"
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outputs = [ "{{source_out_dir}}/{{label_name}}.{{source_name_part}}.o" ]
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}
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tool("cxx") {
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depfile = "{{output}}.d"
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command = "$cxx -MMD -MF $depfile -o {{output}} -c {{source}} {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}}"
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depsformat = "gcc"
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description = "CXX {{output}}"
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outputs = [ "{{source_out_dir}}/{{label_name}}.{{source_name_part}}.o" ]
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}
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tool("objcxx") {
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depfile = "{{output}}.d"
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command = "$cxx -MMD -MF $depfile -o {{output}} -c {{source}} {{defines}} {{include_dirs}} {{cflags}} {{cflags_objcc}}"
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depsformat = "gcc"
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description = "OBJCXX {{output}}"
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outputs = [ "{{source_out_dir}}/{{label_name}}.{{source_name_part}}.o" ]
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}
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tool("asm") {
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depfile = "{{output}}.d"
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command = "$cc -MMD -MF $depfile -o {{output}} -c {{source}} {{defines}} {{include_dirs}} {{asmflags}}"
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depsformat = "gcc"
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description = "ASM {{output}}"
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outputs = [ "{{source_out_dir}}/{{label_name}}.{{source_name_part}}.o" ]
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}
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tool("alink") {
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if (current_os == "ios" || current_os == "mac") {
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command = "libtool -D -static -no_warning_for_no_symbols {{arflags}} -o {{output}} {{inputs}}"
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not_needed([ "ar" ])
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} else {
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# Remove the output file first so that ar doesn't try to modify the
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# existing file.
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command =
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"rm -f {{output}} && $ar rcsD {{arflags}} {{output}} {{inputs}}"
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}
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description = "AR {{output}}"
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outputs = [ "{{output_dir}}/{{target_output_name}}.a" ]
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output_prefix = "lib"
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if (current_os != "serenity") {
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output_prefix = "liblagom-"
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}
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default_output_dir = "{{root_out_dir}}/lib"
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}
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# Make these apply to all tools below.
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lib_switch = "-l"
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lib_dir_switch = "-L"
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tool("solink") {
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outfile = "{{output_dir}}/{{target_output_name}}{{output_extension}}"
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if (current_os == "ios" || current_os == "mac") {
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command = "$ld -shared {{ldflags}} -o $outfile {{inputs}} {{libs}} {{frameworks}}"
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default_output_extension = ".dylib"
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} else {
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command = "$ld -shared {{ldflags}} -Wl,-soname,{{target_output_name}}{{output_extension}} -Wl,-rpath,\\\$ORIGIN -o $outfile {{inputs}} {{libs}}"
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default_output_extension = ".so"
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}
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description = "SOLINK $outfile"
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outputs = [ outfile ]
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output_prefix = "lib"
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if (current_os != "serenity") {
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output_prefix = "liblagom-"
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}
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default_output_dir = "{{root_out_dir}}/lib"
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}
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tool("solink_module") {
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outfile = "{{output_dir}}/{{target_output_name}}{{output_extension}}"
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if (current_os == "ios" || current_os == "mac") {
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command = "$ld -shared {{ldflags}} -Wl,-flat_namespace -Wl,-undefined,suppress -o $outfile {{inputs}} {{libs}} {{frameworks}}"
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default_output_extension = ".dylib"
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} else {
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command = "$ld -shared {{ldflags}} -Wl,-soname,{{target_output_name}}{{output_extension}} -Wl,-rpath,\\\$ORIGIN -o $outfile {{inputs}} {{libs}}"
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default_output_extension = ".so"
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}
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description = "SOLINK $outfile"
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outputs = [ outfile ]
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if (current_os != "serenity") {
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output_prefix = "lagom-"
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}
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default_output_dir = "{{root_out_dir}}/lib"
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}
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tool("link") {
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outfile = "{{output_dir}}/{{target_output_name}}{{output_extension}}"
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if (current_os == "ios" || current_os == "mac") {
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command =
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"$ld {{ldflags}} -o $outfile {{inputs}} {{libs}} {{frameworks}}"
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} else {
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command = "$ld {{ldflags}} -o $outfile -Wl,--start-group {{inputs}} -Wl,--end-group -Wl,-rpath,\\\$ORIGIN/../lib {{libs}}"
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}
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description = "LINK $outfile"
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outputs = [ outfile ]
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# Setting this allows targets to override the default executable output by
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# setting output_dir.
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default_output_dir = "{{root_out_dir}}/bin"
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}
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tool("copy") {
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command = unix_copy_command
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description = "COPY {{source}} {{output}}"
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}
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if (current_os == "ios" || current_os == "mac") {
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tool("copy_bundle_data") {
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# https://github.com/nico/hack/blob/master/notes/copydir.md
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_copydir = "cd {{source}} && " +
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"find . | cpio -pdl \"\$OLDPWD\"/{{output}} 2>/dev/null"
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command = "rm -rf {{output}} && if [[ -d {{source}} ]]; then " +
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_copydir + "; else " + unix_copy_command + "; fi"
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description = "COPY_BUNDLE_DATA {{source}} {{output}}"
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}
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tool("compile_xcassets") {
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command = "false"
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description = "The serenity build doesn't use any xcasset files"
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}
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}
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tool("stamp") {
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command = "touch {{output}}"
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description = "STAMP {{output}}"
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}
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}
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}
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declare_args() {
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# C compiler for native builds
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host_cc = "cc"
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# C++ compiler for native builds
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host_cxx = "c++"
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}
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unix_toolchain("unix") {
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toolchain_args = {
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current_os = host_os
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cc = host_cc
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cxx = host_cxx
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}
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}
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# Note: For serenity, we can override cc and cxx etc in toolchain_args
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