1 # Copyright 2014 The Chromium Authors. All rights reserved. 2 # Use of this source code is governed by a BSD-style license that can be 3 # found in the LICENSE file. 4 5 # This config causes functions not to be automatically exported from shared 6 # libraries. By default, all symbols are exported but this means there are 7 # lots of exports that slow everything down. In general we explicitly mark 8 # which functiosn we want to export from components. 9 # 10 # Some third_party code assumes all functions are exported so this is separated 11 # into its own config so such libraries can remove this config to make symbols 12 # public again. 13 # 14 # See http://gcc.gnu.org/wiki/Visibility 15 config("symbol_visibility_hidden") { 16 # Note that -fvisibility-inlines-hidden is set globally in the compiler 17 # config since that can almost always be applied. 18 cflags = [ "-fvisibility=hidden" ] 19 } 20 21 # Settings for executables and shared libraries. 22 config("executable_ldconfig") { 23 ldflags = [ 24 # Want to pass "\$". GN will re-escape as required for ninja. 25 "-Wl,-rpath=\$ORIGIN/", 26 27 "-Wl,-rpath-link=", 28 29 # Newer binutils don't set DT_RPATH unless you disable "new" dtags 30 # and the new DT_RUNPATH doesn't work without --no-as-needed flag. 31 "-Wl,--disable-new-dtags", 32 ] 33 34 if (is_android) { 35 ldflags += [ 36 "-Bdynamic", 37 "-Wl,-z,nocopyreloc", 38 ] 39 } 40 } 41 42 config("no_exceptions") { 43 cflags_cc = [ "-fno-exceptions" ] 44 } 45
