| # 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() { |
| extra_asmflags = [] |
| extra_cflags = [] |
| extra_cflags_c = [] |
| extra_cflags_cc = [] |
| extra_ldflags = [] |
| |
| malloc = "" |
| } |
| |
| if (is_ios) { |
| 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" |
| } |
| } |
| ios_sysroot = exec_script("find_ios_sysroot.py", [ sdk ], "trim string") |
| } |
| |
| config("default") { |
| asmflags = [] |
| cflags = [] |
| cflags_c = [] |
| cflags_cc = [] |
| defines = [] |
| ldflags = [] |
| libs = [] |
| |
| 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. |
| "/utf-8", # Set Source and Executable character sets to UTF-8. |
| ] |
| if (is_clang) { |
| cflags += [ "-fms-compatibility-version=19" ] # 2015 |
| } |
| defines += [ |
| "_CRT_SECURE_NO_WARNINGS", # Disables warnings about sscanf(). |
| "_HAS_EXCEPTIONS=0", # Disables exceptions in MSVC STL. |
| "WIN32_LEAN_AND_MEAN", |
| "NOMINMAX", |
| ] |
| |
| _include_dirs = [ |
| #2017 |
| "$windk/VC/Tools/MSVC/14.10.25017/include", |
| |
| #2015 |
| "$windk/VC/include", |
| |
| # For local builds. |
| # 2017 |
| "$windk/../../../Windows Kits/10/Include/10.0.14393.0/shared", |
| "$windk/../../../Windows Kits/10/Include/10.0.14393.0/ucrt", |
| "$windk/../../../Windows Kits/10/Include/10.0.14393.0/um", |
| "$windk/../../../Windows Kits/10/Include/10.0.14393.0/winrt", |
| |
| # 2015 |
| "$windk/../Windows Kits/8.1/Include/shared", |
| "$windk/../Windows Kits/10/Include/10.0.10150.0/ucrt", |
| "$windk/../Windows Kits/8.1/Include/um", |
| "$windk/../Windows Kits/8.1/Include/winrt", |
| |
| # For builds using win_toolchain asset. |
| "$windk/win_sdk/Include/10.0.14393.0/shared", |
| "$windk/win_sdk/Include/10.0.14393.0/ucrt", |
| "$windk/win_sdk/Include/10.0.14393.0/um", |
| "$windk/win_sdk/Include/10.0.14393.0/winrt", |
| ] |
| if (is_clang) { |
| foreach(dir, _include_dirs) { |
| cflags += [ |
| "-imsvc", |
| dir, |
| ] |
| } |
| } else { |
| include_dirs = _include_dirs |
| } |
| |
| lib_dirs = [ |
| # For local builds. |
| # 2017 |
| "$windk/../../../Windows Kits/10/Lib/10.0.14393.0/ucrt/$target_cpu", |
| "$windk/../../../Windows Kits/10/Lib/10.0.14393.0/um/$target_cpu", |
| |
| #2015 |
| "$windk/../Windows Kits/10/Lib/10.0.10150.0/ucrt/$target_cpu", |
| "$windk/../Windows Kits/8.1/Lib/winv6.3/um/$target_cpu", |
| |
| # For builds using win_toolchain asset. |
| "$windk/win_sdk/Lib/10.0.14393.0/ucrt/$target_cpu", |
| "$windk/win_sdk/Lib/10.0.14393.0/um/$target_cpu", |
| ] |
| |
| #2017 |
| lib_dirs += [ "$windk/VC/Tools/MSVC/14.10.25017/lib/$target_cpu" ] |
| |
| #2015 |
| if (target_cpu == "x86") { |
| lib_dirs += [ "$windk/VC/lib" ] |
| } else { |
| lib_dirs += [ "$windk/VC/lib/amd64" ] |
| } |
| } else { |
| cflags += [ |
| "-fstrict-aliasing", |
| "-fPIC", |
| "-Werror", |
| ] |
| cflags_cc += [ "-std=c++11" ] |
| |
| # The main idea is to slim the exported API, but these flags also improve link time on Mac. |
| # These would make stack traces worse on Linux, so we don't just set them willy-nilly. |
| if (is_component_build || is_ios || is_mac) { |
| cflags += [ "-fvisibility=hidden" ] |
| cflags_cc += [ "-fvisibility-inlines-hidden" ] |
| } |
| } |
| |
| if (current_cpu == "arm") { |
| cflags += [ |
| "-march=armv7-a", |
| "-mfpu=neon", |
| "-mthumb", |
| ] |
| } else if (current_cpu == "mipsel") { |
| cflags += [ "-march=mips32r2" ] |
| } else if (current_cpu == "mips64el") { |
| asmflags += [ "-integrated-as" ] |
| cflags += [ "-integrated-as" ] |
| } 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) { |
| asmflags += [ "--target=$ndk_target" ] |
| cflags += [ |
| "--sysroot=$ndk/sysroot", |
| "-isystem$ndk/sysroot/usr/include/$ndk_target", |
| "-D__ANDROID_API__=$ndk_api", |
| "--target=$ndk_target", |
| ] |
| cflags_cc += [ |
| "-isystem$ndk/sources/android/support/include", |
| "-isystem$ndk/sources/cxx-stl/gnu-libstdc++/4.9/include", |
| "-isystem$ndk/sources/cxx-stl/gnu-libstdc++/4.9/libs/$ndk_stdlib/include", |
| ] |
| ldflags += [ |
| "--sysroot=$ndk/platforms/$ndk_platform", |
| "--target=$ndk_target", |
| "-B$ndk/toolchains/$ndk_gccdir-4.9/prebuilt/$ndk_host/$ndk_target/bin", |
| ] |
| lib_dirs = [ |
| "$ndk/sources/cxx-stl/gnu-libstdc++/4.9/libs/$ndk_stdlib", |
| "$ndk/toolchains/$ndk_gccdir-4.9/prebuilt/$ndk_host/lib/gcc/$ndk_target/4.9.x", |
| ] |
| |
| if (current_cpu == "mips64el") { |
| # The r15b NDK deployed on our bots fails to find /usr/lib64 in the |
| # MIPS64 sysroots, so we must point Clang at /usr/lib64 manually. |
| lib_dirs += [ "$ndk/platforms/$ndk_platform/usr/lib64" ] |
| ldflags += [ "-B$ndk/platforms/$ndk_platform/usr/lib64" ] |
| } |
| |
| libs += [ "gnustl_static" ] |
| } |
| |
| if (is_ios) { |
| _target = target_cpu |
| if (target_cpu == "arm") { |
| _target = "armv7" |
| } else if (target_cpu == "x86") { |
| _target = "i386" |
| } else if (target_cpu == "x64") { |
| _target = "x86_64" |
| } |
| asmflags += [ |
| "-isysroot", |
| ios_sysroot, |
| "-arch", |
| _target, |
| ] |
| cflags += [ |
| "-isysroot", |
| ios_sysroot, |
| "-arch", |
| _target, |
| ] |
| cflags_cc += [ "-stdlib=libc++" ] |
| ldflags += [ |
| "-isysroot", |
| ios_sysroot, |
| "-arch", |
| _target, |
| "-stdlib=libc++", |
| ] |
| libs += [ "objc" ] |
| } |
| |
| if (is_linux) { |
| libs += [ "pthread" ] |
| } |
| |
| if (sanitize != "") { |
| # You can either pass the sanitizers directly, e.g. "address,undefined", |
| # or pass one of the couple common aliases used by the bots. |
| sanitizers = sanitize |
| if (sanitize == "ASAN") { |
| sanitizers = "address,bool,integer-divide-by-zero,nonnull-attribute,null,return,returns-nonnull-attribute,shift,signed-integer-overflow,unreachable,vla-bound,vptr" |
| if (!is_mac) { |
| sanitizers += ",function" # Not supported on Mac. |
| } |
| if (!is_debug) { |
| sanitizers += ",object-size" # No-op with somewhat annoying warning at -O0. |
| } |
| } else if (sanitize == "TSAN") { |
| sanitizers = "thread" |
| } else if (sanitize == "MSAN") { |
| sanitizers = "memory" |
| } |
| |
| cflags += [ |
| "-fsanitize=$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 = [] |
| 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 |
| ] |
| } else { |
| cflags += [ |
| "-Wall", |
| "-Wextra", |
| "-Winit-self", |
| "-Wpointer-arith", |
| "-Wsign-compare", |
| "-Wvla", |
| |
| "-Wno-deprecated-declarations", |
| "-Wno-maybe-uninitialized", |
| ] |
| cflags_cc += [ "-Wnon-virtual-dtor" ] |
| |
| if (is_clang) { |
| cflags += [ |
| "-Weverything", |
| "-Wno-unknown-warning-option", # Let older Clangs ignore newer Clangs' warnings. |
| ] |
| |
| if ((target_cpu == "x86" && is_android) || |
| (target_cpu == "arm" && is_ios)) { |
| # Clang seems to think new/malloc will only be 4-byte aligned on x86 Android and 32-bit iOS. |
| # We're pretty sure it's actually 8-byte alignment. |
| cflags += [ "-Wno-over-aligned" ] |
| } |
| |
| # TODO: fix after we're building with Clang 5 |
| cflags += [ |
| "-Wno-cast-qual", |
| "-Wno-unused-template", |
| "-Wno-zero-as-null-pointer-constant", |
| ] |
| |
| 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-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", |
| ] |
| 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", |
| ] |
| cflags_objcc += [ |
| "-Wno-direct-ivar-access", |
| "-Wno-objcc-interface-ivars", |
| ] |
| } |
| } |
| } |
| config("warnings_except_public_headers") { |
| if (!is_win) { |
| cflags = [ "-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 = [ "/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", |
| "-fdata-sections", |
| "-ffunction-sections", |
| ] |
| if (is_mac || is_ios) { |
| ldflags = [ "-dead_strip" ] |
| } else { |
| 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" ] |
| } |
| } |
| 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. |
| ] |
| } |
| } |