Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame^] | 1 | # Copyright 2015 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 | import("//build/config/chromecast_build.gni") |
| 6 | |
| 7 | assert(is_chromecast) |
| 8 | |
| 9 | config("static_config") { |
| 10 | ldflags = [ |
| 11 | # We want to statically link libstdc++/libgcc. |
| 12 | "-static-libstdc++", |
| 13 | "-static-libgcc", |
| 14 | |
| 15 | # Don't allow visible symbols from libraries that contain |
| 16 | # assembly code with symbols that aren't hidden properly. |
| 17 | # http://b/26390825 |
| 18 | "-Wl,--exclude-libs=libffmpeg.a", |
| 19 | ] |
| 20 | } |
| 21 | |
| 22 | config("ldconfig") { |
| 23 | visibility = [ ":*" ] |
| 24 | |
| 25 | # Chromecast executables depend on several shared libraries in |
| 26 | # /oem_cast_shlib, $ORIGIN, and $ORIGIN/lib. Add these rpaths to each binary. |
| 27 | # This is explicitly disabled in Chrome for security reasons (see comments in |
| 28 | # //build/config/gcc/BUILD.gn), but necessary on Chromecast so that OEM's may |
| 29 | # override the default libraries shipped in the Cast receiver package. |
| 30 | ldflags = [ |
| 31 | "-Wl,-rpath=/oem_cast_shlib", |
| 32 | "-Wl,-rpath=\$ORIGIN/lib", |
| 33 | "-Wl,-rpath=\$ORIGIN", |
| 34 | ] |
| 35 | } |
| 36 | |
| 37 | config("executable_config") { |
| 38 | configs = [ ":ldconfig" ] |
| 39 | |
| 40 | if (current_cpu == "arm") { |
| 41 | ldflags = [ |
| 42 | # Export stdlibc++ and libgcc symbols to force shlibs to refer to these |
| 43 | # symbols from the executable. |
| 44 | "-Wl,--export-dynamic", |
| 45 | |
| 46 | "-lm", # stdlibc++ requires math.h |
| 47 | |
| 48 | # In case we redefined stdlibc++ symbols (e.g. tc_malloc) |
| 49 | "-Wl,--allow-multiple-definition", |
| 50 | |
| 51 | "-Wl,--whole-archive", |
| 52 | "-l:libstdc++.a", |
| 53 | "-l:libgcc.a", |
| 54 | "-Wl,--no-whole-archive", |
| 55 | ] |
| 56 | |
| 57 | # Despite including libstdc++/libgcc archives, we still need to specify |
| 58 | # static linking for them in order to prevent the executable from having a |
| 59 | # dynamic dependency on them. |
| 60 | configs += [ ":static_config" ] |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | config("shared_library_config") { |
| 65 | configs = [ ":ldconfig" ] |
| 66 | if (current_cpu == "arm") { |
| 67 | configs += [ ":static_config" ] |
| 68 | } |
| 69 | } |