skia2/gn/toolchain/BUILD.gn
Mike Klein 26ad6da9b6 link with --start-group/--end-group
These flags let symbols cross-link from anything in the group.

This becomes useful if we try to make more parts of Skia
components, letting binaries link .a static libraries that
depend on each other without worrying about the order they're
specified on the link line / in the .rsp file.

Few of our bots should be affected by this, as lld doesn't
really need this workaround.

Change-Id: I75f4cc069a2c82c7898d510a6b8b5cf1b8bdbe50
Reviewed-on: https://skia-review.googlesource.com/145529
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
2018-08-07 16:18:01 +00:00

338 lines
9.9 KiB
Plaintext

declare_args() {
host_ar = ar
host_cc = cc
host_cxx = cxx
if (is_android) {
if (host_os == "win") {
target_ar = "$ndk/toolchains/$ndk_gccdir-4.9/prebuilt/$ndk_host/$ndk_target/bin/ar.exe"
target_cc = "$ndk/toolchains/llvm/prebuilt/$ndk_host/bin/clang.exe"
target_cxx = "$ndk/toolchains/llvm/prebuilt/$ndk_host/bin/clang++.exe"
} else {
target_ar = "$ndk/toolchains/$ndk_gccdir-4.9/prebuilt/$ndk_host/$ndk_target/bin/ar"
target_cc = "$ndk/toolchains/llvm/prebuilt/$ndk_host/bin/clang"
target_cxx = "$ndk/toolchains/llvm/prebuilt/$ndk_host/bin/clang++"
}
} else {
target_ar = ar
target_cc = cc
target_cxx = cxx
}
cc_wrapper = ""
}
if (host_os == "win") {
stamp = "cmd.exe /c echo >"
} else {
stamp = "touch"
}
toolchain("msvc") {
lib_dir_switch = "/LIBPATH:"
if (msvc == 2015) {
if (target_cpu == "x86") {
bin = "$win_vc/bin"
} else {
bin = "$win_vc/bin/amd64"
}
} else {
bin = "$win_vc/Tools/MSVC/$win_toolchain_version/bin/HostX64/$target_cpu"
}
env_setup = ""
if (target_cpu == "x86") {
# Toolchain asset includes a script that configures for x86 building.
# We don't support x86 builds with local MSVC installations.
env_setup = "cmd /c $win_sdk/bin/SetEnv.cmd /x86 && "
}
cl_m32_flag = ""
if (clang_win != "") {
if (target_cpu == "x86") {
# cl.exe knows implicitly by the choice of executable that it's targeting
# x86, but clang-cl.exe needs to be told when targeting non-host
# platforms. (All our builders are x86-64, so x86 is always non-host.)
cl_m32_flag = "-m32"
}
cl = "$clang_win/bin/clang-cl.exe"
} else {
cl = "$bin/cl.exe"
}
tool("asm") {
_ml = "ml"
if (target_cpu == "x64") {
_ml += "64"
}
command = "$env_setup $bin/$_ml.exe {{asmflags}} /nologo /c /Fo {{output}} {{source}}"
outputs = [
"{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.obj",
]
description = "assemble {{source}}"
}
tool("cc") {
precompiled_header_type = "msvc"
pdbname = "{{target_out_dir}}/{{label_name}}_c.pdb"
# Label names may have spaces so pdbname must be quoted.
command = "$env_setup $cc_wrapper \"$cl\" /nologo /showIncludes /FC {{defines}} {{include_dirs}} {{cflags}} $cl_m32_flag {{cflags_c}} /c {{source}} /Fo{{output}} /Fd\"$pdbname\""
depsformat = "msvc"
outputs = [
"{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.obj",
]
description = "compile {{source}}"
}
tool("cxx") {
precompiled_header_type = "msvc"
pdbname = "{{target_out_dir}}/{{label_name}}_c.pdb"
# Label names may have spaces so pdbname must be quoted.
command = "$env_setup $cc_wrapper \"$cl\" /nologo /showIncludes /FC {{defines}} {{include_dirs}} {{cflags}} $cl_m32_flag {{cflags_cc}} /c {{source}} /Fo{{output}} /Fd\"$pdbname\""
depsformat = "msvc"
outputs = [
"{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.obj",
]
description = "compile {{source}}"
}
tool("alink") {
rspfile = "{{output}}.rsp"
command = "$env_setup $bin/lib.exe /nologo /ignore:4221 {{arflags}} /OUT:{{output}} @$rspfile"
outputs = [
# Ignore {{output_extension}} and always use .lib, there's no reason to
# allow targets to override this extension on Windows.
"{{root_out_dir}}/{{target_output_name}}{{output_extension}}",
]
default_output_extension = ".lib"
default_output_dir = "{{target_out_dir}}"
# inputs_newline works around a fixed per-line buffer size in the linker.
rspfile_content = "{{inputs_newline}}"
description = "link {{output}}"
}
tool("solink") {
dllname = "{{output_dir}}/{{target_output_name}}{{output_extension}}"
libname = "${dllname}.lib"
pdbname = "${dllname}.pdb"
rspfile = "${dllname}.rsp"
command = "$env_setup $bin/link.exe /nologo /IMPLIB:$libname /DLL /OUT:$dllname /PDB:$pdbname @$rspfile"
outputs = [
dllname,
libname,
pdbname,
]
default_output_extension = ".dll"
default_output_dir = "{{root_out_dir}}"
link_output = libname
depend_output = libname
runtime_outputs = [
dllname,
pdbname,
]
# I don't quite understand this. Aping Chrome's toolchain/win/BUILD.gn.
restat = true
# inputs_newline works around a fixed per-line buffer size in the linker.
rspfile_content = "{{inputs_newline}} {{libs}} {{solibs}} {{ldflags}}"
description = "link {{output}}"
}
tool("link") {
exename = "{{root_out_dir}}/{{target_output_name}}{{output_extension}}"
pdbname = "$exename.pdb"
rspfile = "$exename.rsp"
command =
"$env_setup $bin/link.exe /nologo /OUT:$exename /PDB:$pdbname @$rspfile"
default_output_extension = ".exe"
default_output_dir = "{{root_out_dir}}"
outputs = [
exename,
]
# inputs_newline works around a fixed per-line buffer size in the linker.
rspfile_content = "{{inputs_newline}} {{libs}} {{solibs}} {{ldflags}}"
description = "link {{output}}"
}
tool("stamp") {
command = "$stamp {{output}}"
description = "stamp {{output}}"
}
tool("copy") {
cp_py = rebase_path("../cp.py")
command = "python $cp_py {{source}} {{output}}"
description = "copy {{source}} {{output}}"
}
}
template("gcc_like_toolchain") {
toolchain(target_name) {
ar = invoker.ar
cc = invoker.cc
cxx = invoker.cxx
lib_switch = "-l"
lib_dir_switch = "-L"
tool("cc") {
depfile = "{{output}}.d"
command = "$cc_wrapper $cc -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_c}} -c {{source}} -o {{output}}"
depsformat = "gcc"
outputs = [
"{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o",
]
description = "compile {{source}}"
}
tool("cxx") {
depfile = "{{output}}.d"
command = "$cc_wrapper $cxx -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}} -c {{source}} -o {{output}}"
depsformat = "gcc"
outputs = [
"{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o",
]
description = "compile {{source}}"
}
tool("objc") {
depfile = "{{output}}.d"
command = "$cc_wrapper $cc -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_objc}} -c {{source}} -o {{output}}"
depsformat = "gcc"
outputs = [
"{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o",
]
description = "compile {{source}}"
}
tool("objcxx") {
depfile = "{{output}}.d"
command = "$cc_wrapper $cxx -MMD -MF $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}} {{cflags_objcc}} -c {{source}} -o {{output}}"
depsformat = "gcc"
outputs = [
"{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o",
]
description = "compile {{source}}"
}
tool("asm") {
depfile = "{{output}}.d"
command = "$cc_wrapper $cc -MMD -MF $depfile {{defines}} {{include_dirs}} {{asmflags}} -c {{source}} -o {{output}}"
depsformat = "gcc"
outputs = [
"{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o",
]
description = "assemble {{source}}"
}
tool("alink") {
rspfile = "{{output}}.rsp"
rspfile_content = "{{inputs}}"
ar_py = rebase_path("../ar.py")
command = "python $ar_py $ar {{output}} $rspfile"
outputs = [
"{{root_out_dir}}/{{target_output_name}}{{output_extension}}",
]
default_output_extension = ".a"
output_prefix = "lib"
description = "link {{output}}"
}
tool("solink") {
soname = "{{target_output_name}}{{output_extension}}"
rpath = "-Wl,-soname,$soname"
if (is_mac) {
rpath = "-Wl,-install_name,@rpath/$soname"
}
rspfile = "{{output}}.rsp"
rspfile_content = "{{inputs}}"
command = "$cc_wrapper $cxx -shared {{ldflags}} @$rspfile {{solibs}} {{libs}} $rpath -o {{output}}"
outputs = [
"{{root_out_dir}}/$soname",
]
output_prefix = "lib"
default_output_extension = ".so"
description = "link {{output}}"
}
tool("link") {
rspfile = "{{output}}.rsp"
rspfile_content = "{{inputs}}"
# --start-group/--end-group let us link multiple .a {{inputs}}
# without worrying about their relative order on the link line.
#
# This is mostly important for traditional linkers like GNU ld and Gold.
# The Mac/iOS linker neither needs nor accepts these flags.
# LLD doesn't need these flags, but accepts and ignores them.
_start_group = "-Wl,--start-group"
_end_group = "-Wl,--end-group"
if (is_mac || is_ios) {
_start_group = ""
_end_group = ""
}
command = "$cc_wrapper $cxx {{ldflags}} $_start_group @$rspfile {{solibs}} $_end_group {{libs}} -o {{output}}"
outputs = [
"{{root_out_dir}}/{{target_output_name}}{{output_extension}}",
]
description = "link {{output}}"
}
tool("stamp") {
command = "$stamp {{output}}"
description = "stamp {{output}}"
}
tool("copy") {
cp_py = rebase_path("../cp.py")
command = "python $cp_py {{source}} {{output}}"
description = "copy {{source}} {{output}}"
}
tool("copy_bundle_data") {
cp_py = rebase_path("../cp.py")
command = "python $cp_py {{source}} {{output}}"
description = "copy_bundle_data {{source}} {{output}}"
}
# We don't currently have any xcasset files so make this a NOP
tool("compile_xcassets") {
command = "true"
description = "compile_xcassets {{output}}"
}
toolchain_args = {
current_cpu = invoker.cpu
current_os = invoker.os
}
}
}
gcc_like_toolchain("gcc_like") {
cpu = current_cpu
os = current_os
ar = target_ar
cc = target_cc
cxx = target_cxx
}
gcc_like_toolchain("gcc_like_host") {
cpu = host_cpu
os = host_os
ar = host_ar
cc = host_cc
cxx = host_cxx
}