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# Copyright 2014 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
assert(is_win)
import("//build/config/win/visual_studio_version.gni")
# This template defines a rule to invoke the MS IDL compiler. The generated
# source code will be compiled and linked into targets that depend on this.
#
# Parameters
#
# sources
# List of .idl file to process.
#
# header_file (optional)
# File name of generated header file. Defaults to the basename of the
# source idl file with a .h extension.
#
# out_dir (optional)
# Directory to write the generated files to. Defaults to target_gen_dir.
#
# generated_dir (optional)
# Directory where generated files were previously persisted.
# Defaults to third_party\win_build_output\midl\|out_dir|.
#
# dynamic_guids (optional)
# If the GUIDs are not constant across builds, the current GUID
# substitutions.
# |dynamic_guids| is of the form:
# "PLACEHOLDER-GUID-158428a4-6014-4978-83ba-9fad0dabe791="
# "3d852661-c795-4d20-9b95-5561e9a1d2d9,"
# "PLACEHOLDER-GUID-63B8FFB1-5314-48C9-9C57-93EC8BC6184B="
# "D0E1CACC-C63C-4192-94AB-BF8EAD0E3B83".
# See midl.py for more details.
#
# writes_tlb (optional)
# Whether a .tlb file should be added to outputs. Defaults to false.
#
# writes_proxy(optional)
# Whether a _p.c file should be added to outputs. Defaults to true.
#
# writes_dlldata(optional)
# Whether a .dlldata.c file should be added to outputs. Defaults to true.
#
# deps (optional)
#
# defines (optional)
# Build time defines to be passed to midl.exe as /D parameter.
#
# visibility (optional)
template("midl") {
action_name = "${target_name}_idl_action"
source_set_name = target_name
assert(defined(invoker.sources), "Source must be defined for $target_name")
if (defined(invoker.out_dir)) {
out_dir = invoker.out_dir
} else {
out_dir = target_gen_dir
}
if (defined(invoker.generated_dir)) {
generated_dir = rebase_path(invoker.generated_dir)
} else {
# midl.py expects 'gen' to be replaced with 'midl'.
generated_dir = rebase_path("//third_party/win_build_output") + "/midl/" +
rebase_path(out_dir, root_gen_dir)
}
if (defined(invoker.dynamic_guids)) {
dynamic_guids = invoker.dynamic_guids
} else {
dynamic_guids = "none"
}
if (defined(invoker.header_file)) {
header_file = invoker.header_file
} else {
header_file = "{{source_name_part}}.h"
}
if (defined(invoker.writes_tlb)) {
writes_tlb = invoker.writes_tlb
} else {
writes_tlb = false
}
if (defined(invoker.writes_proxy)) {
writes_proxy = invoker.writes_proxy
} else {
writes_proxy = true
}
if (defined(invoker.writes_dlldata)) {
writes_dlldata = invoker.writes_dlldata
} else {
writes_dlldata = true
}
if (writes_tlb) {
type_library_file = "{{source_name_part}}.tlb"
} else {
type_library_file = "none"
}
if (writes_dlldata) {
dlldata_file = "{{source_name_part}}.dlldata.c"
} else {
dlldata_file = "none"
}
if (writes_proxy) {
proxy_file = "{{source_name_part}}_p.c"
} else {
proxy_file = "none"
}
interface_identifier_file = "{{source_name_part}}_i.c"
action_foreach(action_name) {
visibility = [ ":$source_set_name" ]
script = "//build/toolchain/win/midl.py"
sources = invoker.sources
outputs = [
"$out_dir/$header_file",
"$out_dir/$interface_identifier_file",
]
# These files are only added to outputs if the invoker so desires, as it
# they are not always generated depending on the content of the input idl
# file.
if (writes_tlb) {
outputs += [ "$out_dir/$type_library_file" ]
}
if (writes_dlldata) {
outputs += [ "$out_dir/$dlldata_file" ]
}
if (writes_proxy) {
outputs += [ "$out_dir/$proxy_file" ]
}
if (target_cpu == "x86") {
win_tool_arch = "environment.x86"
idl_target_platform = "win32"
} else if (target_cpu == "x64") {
win_tool_arch = "environment.x64"
idl_target_platform = "x64"
} else if (target_cpu == "arm64") {
win_tool_arch = "environment.arm64"
idl_target_platform = "arm64"
} else {
assert(false, "Need environment for this arch")
}
args = [
win_tool_arch,
generated_dir,
rebase_path(out_dir, root_build_dir),
dynamic_guids,
type_library_file,
header_file,
dlldata_file,
interface_identifier_file,
proxy_file,
rebase_path("//third_party/llvm-build/Release+Asserts/bin/clang-cl.exe",
root_build_dir),
"{{source}}",
"/char",
"signed",
"/env",
idl_target_platform,
"/Oicf",
]
if (defined(invoker.defines)) {
foreach(define, invoker.defines) {
args += [ "/D" + define ]
}
}
forward_variables_from(invoker, [ "deps" ])
}
source_set(target_name) {
forward_variables_from(invoker, [ "visibility" ])
# We only compile the IID files from the IDL tool rather than all outputs.
sources = process_file_template(invoker.sources,
[ "$out_dir/$interface_identifier_file" ])
public_deps = [ ":$action_name" ]
}
}
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