shaka-packager/packager/third_party/libc++-static/README

This is a placeholder.  Shaka Packager depends on an old version of the
Chromium build system, which unconditionally adds this folder to the library
search path.  We no longer fetch a copy of libc++-static, but chromium's
common.gypi file can't be configured to exclude this from the linker path.
Therefore we just add a placeholder here to silence linker warnings.
build: Stop using hermetic clang, libc++, etc This brings our default build config more in line with what is necessary for some platforms anyway: using the system-installed toolchain and sysroot to build everything. We will no longer fetch source or binaries for any specific build tools, such as libc++, clang, gold, binutils, or valgrind. The main part of this change is the changing of default gyp settings in gyp_packager.py. For this, a bug in gyp_packager.py had to be fixed, in which similar GYP_DEFINE key names (such as clang and host_clang) would conflict, causing some defaults not to be installed properly. In order to enable clang=0 by default, some changes had to be made in common.gypi: - compiler macros added to fix a compatibility issue between Chromium's base/mac/ folder and the actual OSX SDK - replaced clang_warning_flags variables with standard cflags settings, plus xcode_settings for OSX - turned off warnings-as-errors for non-shaka code, rather than allow-listing specific warning types, since we can't actually fix those warnings on any platform - disabled two specific warnings in shaka code, both of which are caused by headers from our non-shaka dependencies Also, one warning (missing "override" keyword) has been fixed in vod_media_info_dump_muxer_listener.h. Although these changes were done to make building simpler on a wider array of platforms (arm64, for example), it seems to make the build a bit faster, too. For me, at least, on my main Linux workstation: - "gclient sync" now runs 20-30% faster - "ninja -C out/Release" now runs 5-13% faster The following environment variables are no longer required: - DEPOT_TOOLS_WIN_TOOLCHAIN - MACOSX_DEPLOYMENT_TARGET Documentation, Dockerfiles, and GitHub Actions workflows have been updated to reflect this. The following GYP_DEFINES are no longer required for anyone: - clang=0 - host_clang=0 - clang_xcode=1 - use_allocator=none - use_experimental_allocator_shim=0 Documentation, Dockerfiles, and GitHub Actions workflows have been updated to reflect this. The following repos are no longer dependencies in gclient: - binutils - clang - gold - libc++ - libc++abi - valgrind The following gclient hooks have been removed: - clang - mac_toolchain - sysroot Change-Id: Ie94ccbeec722ab73c291cb7df897d20761a09a70 2021-07-28 20:01:19 +00:00			`This is a placeholder. Shaka Packager depends on an old version of the`
			`Chromium build system, which unconditionally adds this folder to the library`
			`search path. We no longer fetch a copy of libc++-static, but chromium's`
			`common.gypi file can't be configured to exclude this from the linker path.`
			`Therefore we just add a placeholder here to silence linker warnings.`