| # Copyright 2016 Google Inc. |
| # |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| if (is_fuchsia) { |
| import("//build/fuchsia/sdk.gni") |
| } |
| |
| declare_args() { |
| extra_asmflags = [] |
| extra_cflags = [] |
| extra_cflags_c = [] |
| extra_cflags_cc = [] |
| extra_ldflags = [] |
| |
| malloc = "" |
| werror = false |
| xcode_sysroot = "" |
| } |
| |
| if (is_ios && xcode_sysroot == "") { |
| if (is_tvos) { |
| sdk = "appletvos" |
| if (target_cpu == "x86" || target_cpu == "x64") { |
| sdk = "appletvsimulator" |
| } |
| } else { |
| sdk = "iphoneos" |
| if (target_cpu == "x86" || target_cpu == "x64") { |
| sdk = "iphonesimulator" |
| } |
| } |
| xcode_sysroot = exec_script("find_xcode_sysroot.py", [ sdk ], "trim string") |
| } |
| |
| # If building for mac on a mac then lookup all the system includes so that goma and the clang |
| # shipped with chrome can find them. When the gn_to_bp.py tool is run, then the host_os != mac. |
| # In this case leave the xcode_sysroot empty, and the cc/c++ that come with XCode will be able to |
| # find needed include paths. |
| if (is_mac && host_os == "mac" && xcode_sysroot == "") { |
| xcode_sysroot = |
| exec_script("find_xcode_sysroot.py", [ "macosx" ], "trim string") |
| } |
| |
| config("default") { |
| asmflags = [] |
| cflags = [] |
| cflags_c = [] |
| cflags_cc = [] |
| defines = [] |
| ldflags = [] |
| libs = [] |
| |
| if (werror) { |
| if (is_win) { |
| cflags += [ "/WX" ] |
| } else { |
| cflags += [ "-Werror" ] |
| } |
| } |
| |
| # Disable warnings about unknown attributes. |
| # (These unknown attribute warnings are on by default, so we don't make |
| # disabling them part of :warnings, as some targets remove :warnings.) |
| if (is_win && !is_clang) { |
| cflags += [ "/wd5030" ] |
| } else { |
| cflags += [ "-Wno-attributes" ] |
| } |
| |
| if (is_fuchsia && using_fuchsia_sdk) { |
| ldflags += [ |
| "-v", |
| "--sysroot=" + rebase_path("$fuchsia_sdk_path/arch/$target_cpu/sysroot"), |
| ] |
| cflags += [ "--sysroot=" + |
| rebase_path("$fuchsia_sdk_path/arch/$target_cpu/sysroot") ] |
| if (target_cpu == "x64") { |
| target_triple = "--target=x86_64-${target_os}" |
| } else if (target_cpu == "arm64") { |
| target_triple = "--target=aarch64-unknown-${target_os}" |
| } else { |
| print("Unknown target CPU for Fuchsia target build.") |
| assert(false) |
| } |
| ldflags += [ target_triple ] |
| cflags += [ target_triple ] |
| asmflags += [ target_triple ] |
| } |
| |
| if (is_win) { |
| if (is_clang && target_cpu == "arm64") { |
| cflags += [ "--target=arm64-windows" ] |
| } |
| cflags += [ |
| "/bigobj", # Some of our files are bigger than the regular limits. |
| "/utf-8", # Set Source and Executable character sets to UTF-8. |
| ] |
| cflags_cc += [ "/std:c++17" ] |
| defines += [ |
| "_CRT_SECURE_NO_WARNINGS", # Disables warnings about sscanf(). |
| "_HAS_EXCEPTIONS=0", # Disables exceptions in MSVC STL. |
| "WIN32_LEAN_AND_MEAN", |
| "NOMINMAX", |
| ] |
| |
| _include_dirs = [ |
| "$win_vc/Tools/MSVC/$win_toolchain_version/include", |
| "$win_sdk/Include/$win_sdk_version/shared", |
| "$win_sdk/Include/$win_sdk_version/ucrt", |
| "$win_sdk/Include/$win_sdk_version/um", |
| "$win_sdk/Include/$win_sdk_version/winrt", |
| ] |
| |
| if (is_clang) { |
| foreach(dir, _include_dirs) { |
| cflags += [ |
| "-imsvc", |
| dir, |
| ] |
| } |
| } else { |
| include_dirs = _include_dirs |
| } |
| |
| lib_dirs = [ |
| "$win_sdk/Lib/$win_sdk_version/ucrt/$target_cpu", |
| "$win_sdk/Lib/$win_sdk_version/um/$target_cpu", |
| "$win_vc/Tools/MSVC/$win_toolchain_version/lib/$target_cpu", |
| ] |
| } else { |
| cflags += [ |
| "-fstrict-aliasing", |
| "-fPIC", |
| "-fvisibility=hidden", |
| ] |
| cflags_cc += [ |
| "-std=c++17", |
| "-fvisibility-inlines-hidden", |
| ] |
| } |
| |
| if (current_cpu == "arm") { |
| cflags += [ |
| "-march=armv7-a", |
| "-mfpu=neon", |
| "-mthumb", |
| ] |
| } else if (current_cpu == "x86" && !is_win) { |
| asmflags += [ "-m32" ] |
| cflags += [ |
| "-m32", |
| "-msse2", |
| "-mfpmath=sse", |
| ] |
| ldflags += [ "-m32" ] |
| } |
| |
| if (malloc != "" && !is_win) { |
| cflags += [ |
| "-fno-builtin-malloc", |
| "-fno-builtin-calloc", |
| "-fno-builtin-realloc", |
| "-fno-builtin-free", |
| ] |
| libs += [ malloc ] |
| } |
| |
| if (is_android) { |
| cflags += [ "--sysroot=$ndk/toolchains/llvm/prebuilt/$ndk_host/sysroot" ] |
| ldflags += [ "-static-libstdc++" ] |
| } |
| |
| if (is_ios) { |
| if (target_cpu == "arm") { |
| _arch_flags = [ |
| "-arch", |
| "armv7", |
| ] |
| } else if (target_cpu == "arm64") { |
| _arch_flags = [ |
| "-arch", |
| "arm64", |
| "-arch", |
| "arm64e", |
| ] |
| } else if (target_cpu == "x86") { |
| _arch_flags = [ |
| "-arch", |
| "i386", |
| ] |
| } else if (target_cpu == "x64") { |
| _arch_flags = [ |
| "-arch", |
| "x86_64", |
| ] |
| } else { |
| _arch_flags = [ |
| "-arch", |
| target_cpu, |
| ] |
| } |
| |
| asmflags += [ |
| "-isysroot", |
| xcode_sysroot, |
| ] + _arch_flags |
| cflags += [ |
| "-isysroot", |
| xcode_sysroot, |
| ] + _arch_flags |
| cflags_cc += [ |
| "-stdlib=libc++", |
| "-fno-aligned-allocation", |
| ] |
| ldflags += [ |
| "-isysroot", |
| xcode_sysroot, |
| "-stdlib=libc++", |
| ] + _arch_flags |
| libs += [ "objc" ] |
| } |
| |
| if (is_linux) { |
| libs += [ "pthread" ] |
| } |
| |
| if (is_mac) { |
| # If there was a xcode_sysroot set in args or calculated then use it, else don't set anything |
| # because the XCode cc/c++ already know all this stuff. |
| if (xcode_sysroot != "") { |
| asmflags += [ |
| "-isysroot", |
| xcode_sysroot, |
| ] |
| cflags += [ |
| "-isysroot", |
| xcode_sysroot, |
| ] |
| ldflags += [ |
| "-isysroot", |
| xcode_sysroot, |
| ] |
| } |
| |
| # Disable linker warnings. They're usually just annoyances like, |
| # ld: warning: text-based stub file |
| # /System/Library/Frameworks/foo.framework/foo.tbd and library file |
| # /System/Library/Frameworks/foo.framework/foo are out of sync. |
| # Falling back to library file for linking. |
| ldflags += [ "-Wl,-w" ] |
| |
| # As of 11/2020, gn is an x86 binary and defaults the host_cpu to x86_64. |
| # This allows you to build arm64 mac binaries by setting target_cpu = "arm64" |
| if (current_cpu == "arm64") { |
| asmflags += [ |
| "-target", |
| "arm64-apple-macos11", |
| ] |
| cflags += [ |
| "-target", |
| "arm64-apple-macos11", |
| ] |
| ldflags += [ |
| "-target", |
| "arm64-apple-macos11", |
| ] |
| } |
| } |
| |
| if (sanitize != "" && sanitize != "MSVC") { |
| # 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") { |
| # ASAN implicitly runs all UBSAN checks also. |
| sanitizers = "undefined,address" |
| |
| if (is_android) { |
| # TODO(mtklein): work out UBSAN link errors |
| sanitizers = "address" |
| } |
| } else if (sanitize == "TSAN") { |
| sanitizers = "thread" |
| } else if (sanitize == "MSAN") { |
| sanitizers = "memory" |
| } |
| |
| _suppressions = rebase_path("../tools/xsan.supp") |
| |
| cflags += [ |
| "-fsanitize=$sanitizers", |
| "-fno-sanitize-recover=$sanitizers", |
| "-fsanitize-blacklist=$_suppressions", |
| ] |
| |
| if (is_win) { |
| cflags += [ |
| "/FI$_suppressions", |
| |
| # On Release builds, we get strange warnings about string literals. |
| "/GF-", |
| ] |
| |
| assert(clang_win != "") |
| libs += [ "$clang_win/lib/clang/$clang_win_version/lib/windows/clang_rt.asan-x86_64.lib" ] |
| } else { |
| cflags += [ |
| "-include$_suppressions", |
| "-fno-omit-frame-pointer", |
| ] |
| |
| ldflags += [ "-fsanitize=$sanitizers" ] |
| } |
| |
| if (is_linux) { |
| cflags_cc += [ "-stdlib=libc++" ] |
| ldflags += [ "-stdlib=libc++" ] |
| } |
| |
| if (sanitizers == "memory") { |
| cflags += [ "-fsanitize-memory-track-origins" ] |
| } |
| if (sanitizers == "safe-stack") { |
| cflags_cc += [ "-fno-aligned-allocation" ] |
| } |
| } |
| } |
| |
| # See skia:9731. |
| config("recover_pointer_overflow") { |
| cflags = [ "-fsanitize-recover=pointer-overflow" ] |
| } |
| |
| 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 = [] |
| cflags_objcc = [] |
| 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 |
| |
| # These only show up in shared builds: |
| "/wd4251", # class 'type' needs to have dll-interface to be used by |
| # clients of class 'type2' |
| "/wd4275", # non dll-interface class 'base' used as base for |
| # dll-interface class 'derived' |
| |
| # It'd be nice to fix these and turn this on: |
| "/wd5041", # out-of-line definition for constexpr static data member is |
| # not needed and is deprecated in C++17 |
| |
| # warning C4996: 'std::result_of_t': warning STL4014: std::result_of and std::result_of_t are |
| # deprecated in C++17. They are superseded by std::invoke_result and std::invoke_result_t. |
| "/wd4996", |
| ] |
| } else { |
| cflags += [ |
| "-Wall", |
| "-Wextra", |
| "-Winit-self", |
| "-Wpointer-arith", |
| "-Wsign-compare", |
| "-Wvla", |
| |
| "-Wno-deprecated-declarations", |
| "-Wno-maybe-uninitialized", |
| "-Wno-psabi", |
| ] |
| cflags_cc += [ |
| "-Wnon-virtual-dtor", |
| "-Wno-noexcept-type", |
| "-Wno-redundant-move", #TODO: gcc conflict with return-std-move-in-c++11 |
| ] |
| } |
| |
| if (is_clang) { |
| cflags += [ |
| "-fcolor-diagnostics", |
| "-Weverything", |
| "-Wno-unknown-warning-option", # Let older Clangs ignore newer Clangs' |
| # warnings. |
| ] |
| |
| if (target_cpu == "arm" && is_ios) { |
| # Clang seems to think new/malloc will only be 4-byte aligned on 32-bit iOS. |
| # We're pretty sure it's actually 8-byte alignment. |
| cflags += [ "-Wno-over-aligned" ] |
| } |
| if (target_cpu == "x86" && is_android) { |
| # Clang seems to think new/malloc will only be 4-byte aligned on 32-bit x86 Android builds. |
| # We're pretty sure it's actually 8-byte alignment. See OverAlignedTest.cpp for more info. |
| cflags += [ "-Wno-over-aligned" ] |
| } |
| |
| # Shouldn't be necessary for local builds. With distributed Windows builds, files may lose |
| # their case during copy, causing case-sensitivity mismatch on remote machines. |
| cflags += [ |
| "-Wno-nonportable-include-path", |
| "-Wno-nonportable-system-include-path", |
| ] |
| |
| # TODO: These would all be really great warnings to turn on. |
| cflags += [ |
| "-Wno-cast-align", |
| "-Wno-cast-qual", |
| "-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-equal", |
| "-Wno-format-nonliteral", |
| "-Wno-global-constructors", # TODO: OK outside libskia |
| "-Wno-missing-prototypes", |
| "-Wno-missing-variable-declarations", |
| "-Wno-pedantic", |
| "-Wno-reserved-id-macro", |
| "-Wno-shadow", |
| "-Wno-shift-sign-overflow", |
| "-Wno-signed-enum-bitfield", |
| "-Wno-switch-enum", |
| "-Wno-undef", |
| "-Wno-unreachable-code", |
| "-Wno-unreachable-code-break", |
| "-Wno-unreachable-code-return", |
| "-Wno-unused-macros", |
| "-Wno-unused-member-function", |
| "-Wno-unused-template", |
| "-Wno-zero-as-null-pointer-constant", |
| "-Wno-thread-safety-negative", |
| "-Wno-non-c-typedef-for-linkage", # Dawn, not Skia per se. |
| ] |
| cflags_cc += [ |
| "-Wno-abstract-vbase-init", |
| "-Wno-weak-vtables", |
| ] |
| |
| # Turn back on after -Wno-conversion. |
| # This only affects public headers... see :warnings_except_public_headers. |
| cflags += [ "-Wsign-conversion" ] |
| |
| # We are unlikely to want to fix these. |
| cflags += [ |
| "-Wno-covered-switch-default", |
| "-Wno-deprecated", |
| "-Wno-missing-noreturn", |
| "-Wno-old-style-cast", |
| "-Wno-padded", |
| "-Wno-newline-eof", |
| ] |
| 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", |
| ] |
| cflags_objcc += [ |
| "-Wno-direct-ivar-access", |
| "-Wno-objcc-interface-ivars", |
| ] |
| |
| # Wno-deprecated turns off the whole group, but also has its own warnings like |
| # out-of-line definition of constexpr static data member is redundant in C++17 and is deprecated [-Werror,-Wdeprecated] |
| # but we would like others. Created from clang/include/clang/Basic/DiagnosticGroups.td |
| cflags += [ |
| "-Wdeprecated-anon-enum-enum-conversion", |
| "-Wdeprecated-array-compare", |
| "-Wdeprecated-attributes", |
| "-Wdeprecated-comma-subscript", |
| "-Wdeprecated-copy", |
| |
| #"-Wdeprecated-copy-dtor", |
| #"-Wdeprecated-declarations", |
| "-Wdeprecated-dynamic-exception-spec", |
| "-Wdeprecated-enum-compare", |
| "-Wdeprecated-enum-compare-conditional", |
| "-Wdeprecated-enum-enum-conversion", |
| "-Wdeprecated-enum-float-conversion", |
| "-Wdeprecated-increment-bool", |
| "-Wdeprecated-register", |
| "-Wdeprecated-this-capture", |
| "-Wdeprecated-volatile", |
| "-Wdeprecated-writable-str", |
| ] |
| } |
| } |
| config("warnings_except_public_headers") { |
| if (!is_win || is_clang) { |
| cflags = [ |
| "-Wno-sign-conversion", |
| "-Wno-unused-parameter", |
| ] |
| } |
| } |
| |
| config("extra_flags") { |
| asmflags = extra_asmflags |
| 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", |
| "-funwind-tables", # Helps make in-process backtraces fuller. |
| ] |
| } else if (is_win) { |
| cflags = [ "/Z7" ] |
| if (is_clang) { |
| cflags += [ "-gcodeview-ghash" ] |
| ldflags = [ "/DEBUG:GHASH" ] |
| } else { |
| ldflags = [ "/DEBUG:FASTLINK" ] |
| } |
| } 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("optimize") { |
| if (is_win) { |
| cflags = [ |
| "/O2", |
| "/Zc:inline", |
| ] |
| ldflags = [ |
| "/OPT:ICF", |
| "/OPT:REF", |
| ] |
| } else { |
| cflags = [ "-O3" ] |
| if (is_mac || is_ios) { |
| ldflags = [ "-dead_strip" ] |
| } else { |
| cflags += [ |
| "-fdata-sections", |
| "-ffunction-sections", |
| ] |
| ldflags = [ "-Wl,--gc-sections" ] |
| } |
| if (target_cpu == "wasm") { |
| # The compiler asks us to add an optimization flag to both cflags |
| # and ldflags to cut down on the local variables, |
| # for performance reasons. |
| # The "linking" step is the conversion to javascript. |
| ldflags += [ "-O3" ] |
| } |
| } |
| } |
| |
| config("NDEBUG") { |
| defines = [ "NDEBUG" ] |
| } |
| |
| config("executable") { |
| if (is_android) { |
| ldflags = [ |
| "-pie", |
| "-rdynamic", |
| ] |
| } else 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. |
| ] |
| } |
| } |