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Update BUILD.gn
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Alexander David Frick
GitHub
parent
0a8453bdc2
commit
7325b89b6a
1 changed files with 38 additions and 37 deletions
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@ -317,7 +317,7 @@ config("compiler") {
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cflags += [ "-fno-strict-aliasing" ] # See http://crbug.com/32204
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# Stack protection.
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if (is_mac) {
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if (is_apple) {
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# The strong variant of the stack protector significantly increases
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# binary size, so only enable it in debug mode.
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if (is_debug) {
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@ -369,7 +369,7 @@ config("compiler") {
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]
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}
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# Non-Mac Posix and Fuchsia compiler flags setup.
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# Non-Apple Posix and Fuchsia compiler flags setup.
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# -----------------------------------
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if ((is_posix && !is_apple) || is_fuchsia) {
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if (enable_profiling) {
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@ -420,6 +420,23 @@ config("compiler") {
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}
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}
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}
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# Apple compiler flags setup.
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# ---------------------------------
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if (is_apple) {
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# On Intel, clang emits both Apple's "compact unwind" information and
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# DWARF eh_frame unwind information by default, for compatibility reasons.
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# This flag limits emission of eh_frame information to functions
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# whose unwind information can't be expressed in the compact unwind format
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# (which in practice means almost everything gets only compact unwind
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# entries). This reduces object file size a bit and makes linking a bit
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# faster.
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# On arm64, this is already the default behavior.
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if (current_cpu == "x64") {
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asmflags += [ "-femit-dwarf-unwind=no-compact-unwind" ]
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cflags += [ "-femit-dwarf-unwind=no-compact-unwind" ]
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}
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}
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# Linux/Android/Fuchsia common flags setup.
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# ---------------------------------
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@ -591,10 +608,11 @@ config("compiler") {
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cflags_c += [ "/std:c11" ]
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cflags_cc += [ "/std:c++17" ]
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} else if (!is_nacl) {
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# TODO(mcgrathr) - the NaCl GCC toolchain doesn't support either gnu11/gnu++11
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# or c11/c++11; we technically don't need this toolchain any more, but there
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# are still a few buildbots using it, so until those are turned off
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# we need the !is_nacl clause and the (is_nacl && is_clang) clause, above.
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# TODO(mcgrathr) - the NaCl GCC toolchain doesn't support either
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# gnu11/gnu++11 or c11/c++11; we technically don't need this toolchain any
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# more, but there are still a few buildbots using it, so until those are
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# turned off we need the !is_nacl clause and the (is_nacl && is_clang)
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# clause, above.
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cflags_c += [ "-std=c11" ]
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cflags_cc += [ "-std=c++17" ]
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}
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@ -605,33 +623,6 @@ config("compiler") {
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cflags_cc += [ "-Wno-trigraphs" ]
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}
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# Before C++17, an `alignas(N)` type would be N-aligned on the stack,
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# but heap allocation would just return something aligned to whatever the
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# default allocator happens to return. Starting with C++17, operator new
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# called on aligned types with N > __STDCPP_DEFAULT_NEW_ALIGNMENT__ will
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# call a special overload that hands in the desired alignment, and that will
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# honor the alignas even for memory on the heap.
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# However, that requires that operator new overload to exist. At least on
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# macOS and iOS, they are in libc++abi, and system libc++abi has them as of
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# "macOS 10.12, iOS 10.0" (https://reviews.llvm.org/D112921#3128089).
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# However, we do statically link libc++abi, so maybe just explicitly passing
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# -faligned-allocation is enough to make things work.
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# For now, explicitly disable this feature though to keep the C++14 aligned
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# allocation behavior (and do that on all platforms so that we have
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# consistent behavior across platforms), to make the change more incremental.
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if (!is_nacl || is_nacl_saigo) {
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if (is_win) {
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cflags_cc += [ "/Zc:alignedNew-" ]
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} else {
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cflags_cc += [ "-fno-aligned-new" ]
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}
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}
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if (is_mac) {
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# The system libc++ on Mac doesn't have aligned allocation in C++17.
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defines += [ "_LIBCPP_HAS_NO_ALIGNED_ALLOCATION" ]
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}
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# Add flags for link-time optimization. These flags enable
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# optimizations/transformations that require whole-program visibility at link
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# time, so they need to be applied to all translation units, and we may end up
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@ -753,9 +744,7 @@ config("compiler") {
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if (use_lld && !enable_call_graph_profile_sort) {
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if (is_win) {
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ldflags += [ "/call-graph-profile-sort:no" ]
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} else if (!is_apple) {
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# TODO(thakis): Once LLD's Mach-O port basically works, implement call
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# graph profile sorting for it, add an opt-out flag, and pass it here.
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} else {
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ldflags += [ "-Wl,--no-call-graph-profile-sort" ]
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}
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}
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@ -1546,10 +1535,22 @@ config("default_warnings") {
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# TODO(thakis): Only for no_chromium_code? http://crbug.com/912662
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"-Wno-ignored-pragma-optimize",
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]
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if (!is_nacl) {
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# TODO(https://crbug.com/1300731) Clean up and enable.
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cflags += [ "-Wno-unqualified-std-cast-call" ]
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# Do not set the below flags if it's nacl as nacl-clang doesn't have the
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# patches that require these flags.
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if (llvm_force_head_revision) {
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cflags += [
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# TODO(crbug.com/1343303) Evaluate and possibly enable.
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"-Wno-array-parameter",
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# TODO(crbug.com/1343975) Evaluate and possibly enable.
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"-Wno-deprecated-builtins",
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]
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}
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}
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if (is_fuchsia) {
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