skia2/gn/BUILD.gn
Mike Klein 50500ad470 GN: add public headers warnings check.
We already generate skia.h to include all public headers for Fiddle.
This just includes it with -Wunused-parameter turned on as an error.

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4901

Change-Id: Ia55a901c09a3c9c9d6d35a43259431dba3532ed9
Reviewed-on: https://skia-review.googlesource.com/4901
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Commit-Queue: Mike Klein <mtklein@chromium.org>
2016-11-16 19:27:29 +00:00

642 lines
18 KiB
Plaintext

# Copyright 2016 Google Inc.
#
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
declare_args() {
ar = "ar"
cc = "cc"
cxx = "c++"
if (is_android) {
ar = "$ndk/toolchains/$ndk_gccdir-4.9/prebuilt/$ndk_host/$ndk_target/bin/ar"
cc = "$ndk/toolchains/llvm/prebuilt/$ndk_host/bin/clang"
cxx = "$ndk/toolchains/llvm/prebuilt/$ndk_host/bin/clang++"
if (host_os == "win") {
ar = ar + ".exe"
cc = cc + ".exe"
cxx = cxx + ".exe"
}
}
windk = "C:/Program Files (x86)/Microsoft Visual Studio 14.0"
extra_cflags = []
extra_cflags_c = []
extra_cflags_cc = []
extra_ldflags = []
cc_wrapper = ""
}
if (host_os == "win") {
python = "python.bat"
stamp = "cmd.exe /c echo >"
} else {
python = "python"
stamp = "touch"
}
is_clang = is_android || is_ios || is_mac || (cc == "clang" && cxx == "clang++")
if (!is_clang && !is_win) {
is_clang = exec_script("is_clang.py",
[
cc,
cxx,
],
"value")
}
if (is_ios) {
ios_sysroot = exec_script("find_ios_sysroot.py", [], "trim string")
}
config("default") {
asmflags = []
cflags = []
cflags_c = []
cflags_cc = []
defines = []
ldflags = []
if (is_win) {
cflags += [
"/FS", # Preserve previous PDB behavior.
"/bigobj", # Some of our files are bigger than the regular limits.
"/WX", # Treat warnings as errors.
]
defines += [
"_CRT_SECURE_NO_WARNINGS", # Disables warnings about sscanf().
"_HAS_EXCEPTIONS=0", # Disables exceptions in MSVC STL.
"WIN32_LEAN_AND_MEAN",
"NOMINMAX",
]
include_dirs = [
"$windk/VC/include",
# For local builds.
"$windk/../Windows Kits/10/Include/10.0.10150.0/ucrt",
"$windk/../Windows Kits/8.1/Include/shared",
"$windk/../Windows Kits/8.1/Include/um",
# For builds using win_toolchain asset.
"$windk/win_sdk/Include/10.0.10586.0/shared",
"$windk/win_sdk/Include/10.0.10586.0/ucrt",
"$windk/win_sdk/Include/10.0.10586.0/um",
]
lib_dirs = [
# For local builds.
"$windk/../Windows Kits/10/Lib/10.0.10150.0/ucrt/$target_cpu",
"$windk/../Windows Kits/8.1/Lib/winv6.3/um/$target_cpu",
# For builds using win_toolchain asset.
"$windk/win_sdk/Lib/10.0.10586.0/ucrt/$target_cpu",
"$windk/win_sdk/Lib/10.0.10586.0/um/$target_cpu",
]
if (target_cpu == "x86") {
lib_dirs += [ "$windk/VC/lib" ]
} else {
lib_dirs += [ "$windk/VC/lib/amd64" ]
}
} else {
cflags += [
"-fstrict-aliasing",
"-fPIC",
"-fvisibility=hidden",
"-Werror",
]
cflags_cc += [
"-std=c++11",
"-fno-threadsafe-statics",
"-fvisibility-inlines-hidden",
]
}
if (current_cpu == "arm") {
cflags += [
"-march=armv7-a",
"-mfpu=neon",
"-mthumb",
]
} else if (current_cpu == "mipsel") {
cflags += [
"-march=mips32r2",
"-mdspr2",
]
} else if (current_cpu == "x86" && !is_win) {
asmflags += [ "-m32" ]
cflags += [
"-m32",
"-msse2",
"-mfpmath=sse",
]
ldflags += [ "-m32" ]
}
if (is_android) {
asmflags += [
"--target=$ndk_target",
"-B$ndk/toolchains/$ndk_gccdir-4.9/prebuilt/$ndk_host/$ndk_target/bin",
]
cflags += [
"--sysroot=$ndk/platforms/$ndk_platform",
"--target=$ndk_target",
"-B$ndk/toolchains/$ndk_gccdir-4.9/prebuilt/$ndk_host/$ndk_target/bin",
]
cflags_cc += [
"-isystem$ndk/sources/android/support/include",
"-isystem$ndk/sources/cxx-stl/llvm-libc++/libcxx/include", # Through r12b.
"-isystem$ndk/sources/cxx-stl/llvm-libc++/include", # Since r13.
]
ldflags += [
"--sysroot=$ndk/platforms/$ndk_platform",
"--target=$ndk_target",
"-B$ndk/toolchains/$ndk_gccdir-4.9/prebuilt/$ndk_host/$ndk_target/bin",
"-pie",
]
lib_dirs = [
"$ndk/sources/cxx-stl/llvm-libc++/libs/$ndk_stdlib",
"$ndk/toolchains/$ndk_gccdir-4.9/prebuilt/$ndk_host/lib/gcc/$ndk_target/4.9.x",
]
if (current_cpu == "mips64el") {
# The r13 NDK omits /usr/lib from the MIPS64 sysroots, but Clang searches
# for /usr/lib64 as $PATH_TO_USR_LIB/../lib64. If there's no /usr/lib,
# it can't find /usr/lib64. We must point Clang at /usr/lib64 manually.
lib_dirs += [ "$ndk/platforms/$ndk_platform/usr/lib64" ]
ldflags += [
# Clang will try to link these two files, but not find them. Again, do it manually.
"-nostartfiles",
"$ndk/platforms/$ndk_platform/usr/lib64/crtbegin_dynamic.o",
"$ndk/platforms/$ndk_platform/usr/lib64/crtend_android.o",
]
}
libs = [
# Order matters here! Keep these three in exactly this order.
"c++_static",
"c++abi",
"android_support",
]
if (target_cpu == "arm") {
libs += [ "unwind" ]
}
}
if (is_ios) {
cflags += [
"-isysroot",
ios_sysroot,
"-arch",
target_cpu,
]
cflags_cc += [ "-stdlib=libc++" ]
ldflags += [
"-isysroot",
ios_sysroot,
"-arch",
target_cpu,
"-stdlib=libc++",
]
libs = [ "objc" ]
# We used to link all our iOS tools together, so none actually defines main().
# Instead they each define their own entry point, which our iOS mega-app called.
# If we can we'd like to not do that anymore. While we're building both ways, here's
# our clever hack to give each tool back its own main().
cflags += [
"-Ddm_main=main",
"-Dnanobench_main=main",
"-Dtool_main=main",
"-Dtest_main=main",
]
}
if (is_linux) {
libs = [ "pthread" ]
}
if (sanitize != "") {
# You can either pass the sanitizers directly, e.g. "address,undefined",
# or pass one of the couple common aliases used by the bots.
sanitizers = sanitize
if (sanitize == "ASAN") {
sanitizers = "address,bool,function,integer-divide-by-zero,nonnull-attribute,null,object-size,return,returns-nonnull-attribute,shift,signed-integer-overflow,unreachable,vla-bound,vptr"
} else if (sanitize == "TSAN") {
sanitizers = "thread"
} else if (sanitize == "MSAN") {
sanitizers = "memory"
}
cflags += [
"-fsanitize=$sanitizers",
"-fno-sanitize-recover=$sanitizers",
"-fsanitize-blacklist=" + rebase_path("../tools/xsan.blacklist"),
]
ldflags += [ "-fsanitize=$sanitizers" ]
if (sanitizers == "memory") {
cflags += [ "-fsanitize-memory-track-origins" ]
cflags_cc += [ "-stdlib=libc++" ]
ldflags += [ "-stdlib=libc++" ]
}
}
}
config("no_exceptions") {
# Exceptions are disabled by default on Windows. (Use /EHsc to enable them.)
if (!is_win) {
cflags_cc = [ "-fno-exceptions" ]
}
}
config("warnings") {
cflags = []
cflags_cc = []
cflags_objc = []
if (is_win) {
cflags += [
"/W3", # Turn on lots of warnings.
# Disable a bunch of warnings:
"/wd4244", # conversion from 'float' to 'int', possible loss of data
"/wd4267", # conversion from 'size_t' to 'int', possible loss of data
"/wd4800", # forcing value to bool 'true' or 'false' (performance warning)
# Probably only triggers when /EHsc is enabled.
"/wd4291", # no matching operator delete found;
# memory will not be freed if initialization throws an exception
]
} else {
cflags += [
"-Wall",
"-Wextra",
"-Winit-self",
"-Wpointer-arith",
"-Wsign-compare",
"-Wvla",
"-Wno-deprecated-declarations",
]
cflags_cc += [ "-Wnon-virtual-dtor" ]
if (is_clang) {
cflags += [
"-Weverything",
"-Wno-unknown-warning-option", # Let older Clangs ignore newer Clangs' warnings.
]
if (is_android && target_cpu == "x86") {
# Clang seems to think new/malloc will only be 4-byte aligned on x86 Android.
# We're pretty sure it's actually 8-byte alignment.
cflags += [ "-Wno-over-aligned" ]
}
cflags += [
"-Wno-cast-align",
"-Wno-conditional-uninitialized",
"-Wno-conversion",
"-Wno-disabled-macro-expansion",
"-Wno-documentation",
"-Wno-documentation-unknown-command",
"-Wno-double-promotion",
"-Wno-exit-time-destructors", # TODO: OK outside libskia
"-Wno-float-conversion",
"-Wno-float-equal",
"-Wno-format-nonliteral",
"-Wno-global-constructors", # TODO: OK outside libskia
"-Wno-gnu-zero-variadic-macro-arguments",
"-Wno-missing-prototypes",
"-Wno-missing-variable-declarations",
"-Wno-pedantic",
"-Wno-reserved-id-macro",
"-Wno-shadow",
"-Wno-shift-sign-overflow",
"-Wno-sign-conversion",
"-Wno-switch-enum",
"-Wno-undef",
"-Wno-unreachable-code",
"-Wno-unreachable-code-break",
"-Wno-unreachable-code-return",
"-Wno-unused-macros",
"-Wno-unused-member-function",
]
cflags_cc += [
"-Wno-abstract-vbase-init",
"-Wno-weak-vtables",
]
# We are unlikely to want to fix these.
cflags += [
"-Wno-covered-switch-default",
"-Wno-deprecated",
"-Wno-implicit-fallthrough",
"-Wno-missing-noreturn",
"-Wno-old-style-cast",
"-Wno-padded",
]
cflags_cc += [
"-Wno-c++98-compat",
"-Wno-c++98-compat-pedantic",
"-Wno-undefined-func-template",
]
cflags_objc += [
"-Wno-direct-ivar-access",
"-Wno-objc-interface-ivars",
]
}
}
}
config("warnings_except_public_headers") {
if (!is_win) {
cflags = [ "-Wno-unused-parameter" ]
}
}
config("extra_flags") {
cflags = extra_cflags
cflags_c = extra_cflags_c
cflags_cc = extra_cflags_cc
ldflags = extra_ldflags
}
config("debug_symbols") {
# It's annoying to wait for full debug symbols to push over
# to Android devices. -gline-tables-only is a lot slimmer.
if (is_android) {
cflags = [ "-gline-tables-only" ]
} else if (is_win) {
cflags = [ "/Zi" ]
ldflags = [ "/DEBUG" ]
} else {
cflags = [ "-g" ]
}
}
config("no_rtti") {
if (sanitize != "ASAN") { # -fsanitize=vptr requires RTTI
if (is_win) {
cflags_cc = [ "/GR-" ]
} else {
cflags_cc = [ "-fno-rtti" ]
}
}
}
config("release") {
if (is_win) {
cflags = [
"/O2",
"/Zc:inline",
"/GS-",
]
ldflags = [
"/OPT:ICF",
"/OPT:REF",
]
} else {
cflags = [
"-O3",
"-momit-leaf-frame-pointer",
]
}
defines = [ "NDEBUG" ]
}
config("executable") {
if (is_mac) {
ldflags = [ "-Wl,-rpath,@loader_path/." ]
} else if (is_linux) {
ldflags = [
"-rdynamic",
"-Wl,-rpath,\$ORIGIN",
]
} else if (is_win) {
ldflags = [
"/SUBSYSTEM:CONSOLE", # Quiet "no subsystem specified; CONSOLE assumed".
"/INCREMENTAL:NO", # Quiet warnings about failing to incrementally link by never trying to.
]
}
}
toolchain("msvc") {
lib_dir_switch = "/LIBPATH:"
bin = "$windk/VC/bin/amd64"
env_setup = ""
if (target_cpu == "x86") {
bin += "_x86"
env_setup = "cmd /c $windk/win_sdk/bin/SetEnv.cmd /x86 && "
}
tool("cc") {
rspfile = "{{output}}.rsp"
precompiled_header_type = "msvc"
pdbname = "{{target_out_dir}}/{{label_name}}_c.pdb"
# Label names may have spaces so pdbname must be quoted.
command = "$env_setup$bin/cl.exe /nologo /showIncludes /FC @$rspfile /c {{source}} /Fo{{output}} /Fd\"$pdbname\""
depsformat = "msvc"
outputs = [
"{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.obj",
]
rspfile_content = "{{defines}} {{include_dirs}} {{cflags}} {{cflags_c}}"
description = "compile {{source}}"
}
tool("cxx") {
rspfile = "{{output}}.rsp"
precompiled_header_type = "msvc"
pdbname = "{{target_out_dir}}/{{label_name}}_c.pdb"
# Label names may have spaces so pdbname must be quoted.
command = "$env_setup$bin/cl.exe /nologo /showIncludes /FC @$rspfile /c {{source}} /Fo{{output}} /Fd\"$pdbname\""
depsformat = "msvc"
outputs = [
"{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.obj",
]
rspfile_content = "{{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}}"
description = "compile {{source}}"
}
tool("alink") {
rspfile = "{{output}}.rsp"
command = "$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 $cp_py {{source}} {{output}}"
description = "copy {{source}} {{output}}"
}
}
toolchain("gcc_like") {
lib_switch = "-l"
lib_dir_switch = "-L"
tool("cc") {
depfile = "{{output}}.d"
command = "$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 $depfile {{defines}} {{include_dirs}} {{cflags}} {{cflags_cc}} {{cflags_objc}} -c {{source}} -o {{output}}"
depsformat = "gcc"
outputs = [
"{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o",
]
description = "compile {{source}}"
}
tool("asm") {
depfile = "{{output}}.d"
command = "$cc_wrapper $cc -MMD -MF $depfile {{defines}} {{include_dirs}} {{asmflags}} -c {{source}} -o {{output}}"
depsformat = "gcc"
outputs = [
"{{source_out_dir}}/{{target_output_name}}.{{source_name_part}}.o",
]
description = "compile {{source}}"
}
tool("alink") {
rspfile = "{{output}}.rsp"
rspfile_content = "{{inputs}}"
ar_py = rebase_path("ar.py")
command = "$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/$soname"
}
command = "$cc_wrapper $cxx -shared {{ldflags}} {{inputs}} {{solibs}} {{libs}} $rpath -o {{output}}"
outputs = [
"{{root_out_dir}}/$soname",
]
output_prefix = "lib"
default_output_extension = ".so"
description = "link {{output}}"
}
tool("link") {
command = "$cc_wrapper $cxx {{ldflags}} {{inputs}} {{solibs}} {{libs}} -o {{output}}"
outputs = [
"{{root_out_dir}}/{{target_output_name}}{{output_extension}}",
]
description = "link {{output}}"
}
tool("stamp") {
command = "$stamp {{output}}"
description = "stamp {{output}}"
}
tool("copy") {
cp_py = rebase_path("cp.py")
command = "$python $cp_py {{source}} {{output}}"
description = "copy {{source}} {{output}}"
}
}