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# Copyright 2015 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import("//build/config/chromecast_build.gni")
assert(is_chromecast)
config("static_config") {
if (!is_clang) {
ldflags = [
# Don't allow visible symbols from libraries that contain
# assembly code with symbols that aren't hidden properly.
# http://b/26390825
"-Wl,--exclude-libs=libffmpeg.a",
]
if (!is_android) {
ldflags += [
# We want to statically link libstdc++/libgcc on Linux.
# (On Android, libstdc++ and libgcc aren't used.)
"-static-libstdc++",
"-static-libgcc",
]
}
}
}
config("ldconfig") {
visibility = [ ":*" ]
# Chromecast executables depend on several shared libraries in
# /oem_cast_shlib, $ORIGIN, and $ORIGIN/lib. Add these rpaths to each binary.
# This is explicitly disabled in Chrome for security reasons (see comments in
# //build/config/gcc/BUILD.gn), but necessary on Chromecast so that OEM's may
# override the default libraries shipped in the Cast receiver package.
ldflags = [
"-Wl,-rpath=/oem_cast_shlib",
"-Wl,-rpath=\$ORIGIN/lib",
"-Wl,-rpath=\$ORIGIN",
]
# Binaries which don't live in the same directory as Chrome component
# libraries may still depend on them. Explicitly add the component library
# directory to the rpath for the component build.
if (is_component_build) {
ldflags += [ "-Wl,-rpath=/system/chrome" ]
}
}
config("executable_config") {
configs = [ ":ldconfig" ]
if (!is_clang && current_cpu == "arm") {
ldflags = [
# Export stdlibc++ and libgcc symbols to force shlibs to refer to these
# symbols from the executable.
"-Wl,--export-dynamic",
"-lm", # stdlibc++ requires math.h
# In case we redefined stdlibc++ symbols (e.g. tc_malloc)
"-Wl,--allow-multiple-definition",
"-Wl,--whole-archive",
"-l:libstdc++.a",
"-l:libgcc.a",
"-Wl,--no-whole-archive",
]
# Despite including libstdc++/libgcc archives, we still need to specify
# static linking for them in order to prevent the executable from having a
# dynamic dependency on them.
configs += [ ":static_config" ]
}
}
# Shared libaries should not have RPATH or RUNPATH set. This allows the
# shared libs to inherit RPATH from the parent executable that is loading
# the shared library. (See internal b/37514052 for more details.)
config("shared_library_config") {
if (current_cpu == "arm") {
configs = [ ":static_config" ]
}
}
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