59 lines
2.3 KiB
Text
59 lines
2.3 KiB
Text
# Copyright 2015 The Chromium Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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import("//build/config/sysroot.gni")
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# This build configuration is used by both Fuchsia and POSIX systems.
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assert(is_posix || is_fuchsia)
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group("posix") {
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visibility = [ "//:optimize_gn_gen" ]
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}
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# This is included by reference in the //build/config/compiler:runtime_library
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# config that is applied to all targets. It is here to separate out the logic
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# that is Posix-only. Please see that target for advice on what should go in
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# :runtime_library vs. :compiler.
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config("runtime_library") {
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asmflags = []
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cflags = []
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cflags_c = []
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cflags_cc = []
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cflags_objc = []
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cflags_objcc = []
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defines = []
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ldflags = []
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if (!is_apple && sysroot != "") {
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# Pass the sysroot to all C compiler variants, the assembler, and linker.
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sysroot_flags = [ "--sysroot=" + rebase_path(sysroot, root_build_dir) ]
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if (is_linux || is_chromeos) {
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# This is here so that all files get recompiled after a sysroot roll and
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# when turning the sysroot on or off. (defines are passed via the command
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# line, and build system rebuilds things when their commandline
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# changes). Nothing should ever read this define.
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sysroot_hash =
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exec_script("//build/linux/sysroot_scripts/install-sysroot.py",
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[ "--print-hash=$target_cpu" ],
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"trim string",
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[ "//build/linux/sysroot_scripts/sysroots.json" ])
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defines += [ "CR_SYSROOT_HASH=$sysroot_hash" ]
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}
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asmflags += sysroot_flags
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ldflags += sysroot_flags
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# When use_custom_libcxx=true, some -isystem flags get passed to
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# cflags_cc to set up libc++ include paths. We want to make sure
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# the sysroot includes take lower precendence than the libc++
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# ones, so they must appear later in the command line. However,
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# the gn reference states "These variant-specific versions of
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# cflags* will be appended on the compiler command line after
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# 'cflags'." Because of this, we must set the sysroot flags for
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# all cflags variants instead of using 'cflags' directly.
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cflags_c += sysroot_flags
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cflags_cc += sysroot_flags
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cflags_objc += sysroot_flags
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cflags_objcc += sysroot_flags
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}
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}
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