diff options
| -rw-r--r-- | www-client/chromium/Manifest | 5 | ||||
| -rw-r--r-- | www-client/chromium/chromium-132.0.6821.2.ebuild (renamed from www-client/chromium/chromium-130.0.6683.2.ebuild) | 10 | ||||
| -rw-r--r-- | www-client/chromium/files/chromium-132-compiler.patch | 335 |
3 files changed, 343 insertions, 7 deletions
diff --git a/www-client/chromium/Manifest b/www-client/chromium/Manifest index 0f3ce1c..85ce159 100644 --- a/www-client/chromium/Manifest +++ b/www-client/chromium/Manifest @@ -22,14 +22,15 @@ AUX chromium-131-EnumTable-crash.patch 3028 BLAKE2B 0fb49828493eb6a9e7647b643d16 AUX chromium-131-compiler.patch 11595 BLAKE2B 8a4e264140dfc64324d8007586a1c1d961bedc9937a8be73d7834703c37f55e1005ef732ffc994fe8bda7090a1ae41769dd400864db37aafb4415bbb05ba05c7 SHA512 dd2bbdee91e70eaeae4e4485833345edf606c1a12eab15ca3860d97d773f127c0674fb1edab970236d69d44ab81c7a0b058b6c21abc92ea08cd1caceb5572442 AUX chromium-131-text_codec_icu-system-icu.patch 1204 BLAKE2B 97bfcc1ef1e72da9fc3c9a473c32e0077a3eae9a19e7cac65b457ac8196075ea86c66d7ec13638abf617b18b53ab93fe6df4d6423acdedfb086497cadc2a3dff SHA512 f742b9f7b1c7d26e0b3795ad59d00c726e48e872233186cf880021609b27026882ab27e1cbcacfba882ed3381b08fe29912e5ea2553dbdbbe16730b4b63c1f96 AUX chromium-131-use-oauth2-client-switches-as-default.patch 1194 BLAKE2B 040f8161c659d015bfda3f8f2f9c3f904b0b1318233569550c80b4c1a6cfeca8e3d39998e8ebec87880948ec2444214fd0551f0a65111363c3c40fe3c0d717c8 SHA512 20621cc7ee69bb0e53d1806f6e78381357fb31c99d339ed9b385a669dcdc92b800f2b3c2d6833bb36e94348793afe790a6f3f3d5d2f330c57407305fa8095a5a +AUX chromium-132-compiler.patch 12093 BLAKE2B 839df6a7dd7a3c3f0aa82b85a1b324ee35b9ec18426b49159194e843e3d08a7cb5d10d9e6066d11d7aaf0e0c30792b2ad526df58c55fa0b21af7fc431404b974 SHA512 5535ab13069d32affe1c615ac94b9c6ae71c670f5514f5d47ef41050ab1ee0ac36a9aa46825947a0c936397c301491f23a78200b90b8a456cc11b568335987b1 AUX chromium-browser.xml 407 BLAKE2B 168d78b0855546ca559cfb51aff0bc85d5e6ae974c25eb76e4a02f6d11659489c6e40397a0b2f7bc1fda336fd2c6dd8c863fccc3340719210b41c7fef51927f4 SHA512 b767fb4fd1925029d95560fc14cb7ab12ae43b2fe923e92d75e733b9723cbe1dcdf6df041a2b62554e98b79b47ef3f6028c773e72e6fd53166a021d49657aeca AUX chromium-cross-compile.patch 323 BLAKE2B 8d5091ce5287422c9688ede2563360a96b8bd34b9750dc1c8f0b6ca9aeff2c066fac2da169396baa131d971c087c78f9af53999df0e102d1f57176f5e8d3dd57 SHA512 06d3afc1aa19e57daac0e4bad37e1f365a68408240430e5e818e5a4f12e3b7519214eafa463633e447e7029f4ae13ea864ca347ad1fac117702a0be88718a954 AUX chromium-launcher-r7.sh 1631 BLAKE2B ae28d758264446511fd2b64ba69fe920144b351e8833e0e98f43d00633e850094c288b5d97d1a84801ea13aceb294623692c86c1b9be5811b7b97fa8a07a1ecd SHA512 1e97f8394bd8bb4b29570b1b85176efe6258314a596f079bee1c4018113e0023aa54a93690ba8de2a00d127af10dbe2cc3fb3127b72b841c6f28f9e7bed820e0 AUX chromium-shim_headers.patch 1510 BLAKE2B 9716cd250b249c6255aca01a385ef8a2a6f1df9ea3cf7499715543c14f8be62fd323b6048b890aa2be45891e7a765d92de3f41c3b3a88c08dae4b806c048e20f SHA512 c74bcf690a41b4f9b364477d23408d493aa674e3bd014940098a594471297c2a425241f908510061b5f11c9cfe009c4a803370edd757d3c0ab8d9c0cc128135c AUX chromium-use-oauth2-client-switches-as-default.patch 1085 BLAKE2B baf3c463305934c126af4f7c5be305863edc7eec3add5b5ada30565b49b5944021eb40f1a9643e7eec3f973c502d9b02426f00b760570fcea5f1509219e41c6f SHA512 fe2878ee45778bac894ea17a668511d27ad2ca40988d5f11439790b700bfefd6560f3931415b4e6c543fcbbfc7cfef55cc757ed4ace1d111039ae78c46b81945 AUX chromium.default 148 BLAKE2B 5ee5b582c59a6e4bef87bbb0e232e2470ad412b1fbbb3b9af6ef7153edb55c5b9080cc16a5a115b0c5b3c381aa87ce57a7b12bdd2070e67dac10a6c2995ddbaf SHA512 0d4849e03592fb58b05e62a43021eca7e61615616c8907c3b2e445402e03adaf9e8fa25b0a745d6c31eb037456215cc02b59e345a3a06d932e76cf990c92d739 -DIST chromium-130.0.6683.2.tar.xz 6686066448 BLAKE2B 6a4fb05d05c875b793f352edd247b3533806f9d38129ef3175f3736606fb1e21092277cb924bd9960c5b26ff022a2a604c87b6f570551eb0b859a88186e98186 SHA512 5406523316ab1f378660fdcfbfd4ba0a372e2b56dbb8f04f9906b822cb3778d90fad5fa1df7dc183ce288e2a4cb06880c6a473c792c22a9642d15f6aafcff5c6 DIST chromium-131.0.6738.0.tar.xz 6608599384 BLAKE2B 9a415ee207231c4d952435011770e285f4954e2daf3960913b127ac4524e33aff15dcefb10ec0961104bf523c8eca5202451e4bf1b8fc18c34944c73242557ee SHA512 67210dc723d30af7c73c07a88d8bb8e1c17320492f036a75b7a945447ad973a69740d6a0fcfbf0eecd296b0634701c099b6493b1dc6e8810889d0e25bc610a76 +DIST chromium-132.0.6821.2.tar.xz 7153992260 BLAKE2B 2c6d151b111d6966f8c4ddbe79aba98b71d7ebaabd593c64e36ce3a88e6d87703c6181135861dd7e1cc7f9972b63adaf1795ebb5e78dcbe96b9af01a0d79cf2c SHA512 e6c5b21cc7afd287b076bbfd5a927ca51d33faafc730ae6272223e123a5fc6c0b3279f0720d3c42e62a9ad7be42a2b915c4b762d63ea8b89735aedf92db82f76 DIST chromium-profiler-0.2.tar 259952640 BLAKE2B 5e82389fce00b267280d633b26551231c558b80f0c92cd7d60271095a3503365ab673e7a46dc5f74f8a82db1f21262cb24dcc0531d954bab5fb3b175dab3394d SHA512 9fa89a5ab728419683e7495ae676567480987d68a2d589f2aa97bfcbcf123f3c8f97f8bca5f65e5e3f6e41475535add473ded83b9c7a33bb4746a9d05b298a6c -EBUILD chromium-130.0.6683.2.ebuild 40545 BLAKE2B 252c06a46c748663e805359ad0e2664defc65a4a95d64d10d861931d4773bb65f39b82c0b3451fe7be51c79c838b1842b0741631241f1ef689d901bd22f81683 SHA512 bec458184e1028a7fb8041444b0fc4a259d82d056877101b545d72086388575daf66362cbd3aa185bf84853cb0aaccd1151646894cd161674359c0fe61998f01 EBUILD chromium-131.0.6738.0.ebuild 40595 BLAKE2B dd651c0b0ea7b40592bde8093d27a71cb4248a349d3bb635769c2001797494b7ed40675f59f8a6de656913a543b893daaa01edaa0c5e9e5fb121c6aeadb49cd8 SHA512 cb60ae8752c456f384ac6ebf6337dba28af2387a4347c02cb46466acabaa1832d114245d8c8470527210c49ab7b4a4721f67688d5c52d9eb8f2dfc48da982e2c +EBUILD chromium-132.0.6821.2.ebuild 40534 BLAKE2B 66fd5024b07335137633a3323de4c961f8980c150c9404021ba11d616a7e0cb9815544b7e39110c1a38552677a3fd56666ee06eef4ca219498489065a40d71d7 SHA512 9939d1ec416b59937a65d95c8a7cee861750413bce209bb3caef385cc8e1626cce1a6b2a9647e30a214b71a6ddebe275755dd85de956ea23c23f47ef73d95a07 diff --git a/www-client/chromium/chromium-130.0.6683.2.ebuild b/www-client/chromium/chromium-132.0.6821.2.ebuild index ee26219..ff47f59 100644 --- a/www-client/chromium/chromium-130.0.6683.2.ebuild +++ b/www-client/chromium/chromium-132.0.6821.2.ebuild @@ -321,15 +321,15 @@ src_prepare() { local PATCHES=( "${FILESDIR}/chromium-105-protobuf-RepeatedPtrField-export.patch" - "${FILESDIR}/chromium-128-compiler-r1.patch" + "${FILESDIR}/chromium-132-compiler.patch" "${FILESDIR}/chromium-119-minizip.patch" "${FILESDIR}/chromium-118-material-color-utils.patch" "${FILESDIR}/chromium-126-freetype-blink.patch" "${FILESDIR}/chromium-124-metrics-histograms-nodepotbin.patch" "${FILESDIR}/chromium-111-InkDropHost-crash.patch" - "${FILESDIR}/chromium-126-EnumTable-crash.patch" - "${FILESDIR}/chromium-126-use-oauth2-client-switches-as-default-r1.patch" + "${FILESDIR}/chromium-131-EnumTable-crash.patch" + "${FILESDIR}/chromium-131-use-oauth2-client-switches-as-default.patch" "${FILESDIR}/chromium-cross-compile.patch" ) @@ -370,7 +370,6 @@ src_prepare() { buildtools/third_party/libc++ buildtools/third_party/libc++abi chrome/third_party/mozilla_security_manager - courgette/third_party net/third_party/mozilla_security_manager net/third_party/nss net/third_party/quic @@ -434,12 +433,12 @@ src_prepare() { third_party/devtools-frontend/src/front_end/third_party/intl-messageformat third_party/devtools-frontend/src/front_end/third_party/lighthouse third_party/devtools-frontend/src/front_end/third_party/lit - third_party/devtools-frontend/src/front_end/third_party/lodash-isequal third_party/devtools-frontend/src/front_end/third_party/marked third_party/devtools-frontend/src/front_end/third_party/puppeteer third_party/devtools-frontend/src/front_end/third_party/puppeteer/package/lib/esm/third_party/mitt third_party/devtools-frontend/src/front_end/third_party/puppeteer/package/lib/esm/third_party/parsel-js third_party/devtools-frontend/src/front_end/third_party/puppeteer/package/lib/esm/third_party/rxjs + third_party/devtools-frontend/src/front_end/third_party/third-party-web third_party/devtools-frontend/src/front_end/third_party/vscode.web-custom-data third_party/devtools-frontend/src/front_end/third_party/wasmparser third_party/devtools-frontend/src/front_end/third_party/web-vitals @@ -467,6 +466,7 @@ src_prepare() { third_party/googletest third_party/hunspell third_party/iccjpeg + third_party/ink third_party/inspector_protocol third_party/ipcz third_party/jinja2 diff --git a/www-client/chromium/files/chromium-132-compiler.patch b/www-client/chromium/files/chromium-132-compiler.patch new file mode 100644 index 0000000..65a24d8 --- /dev/null +++ b/www-client/chromium/files/chromium-132-compiler.patch @@ -0,0 +1,335 @@ +diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn +index cb9bf8772d..9d459df611 100644 +--- a/build/config/compiler/BUILD.gn ++++ b/build/config/compiler/BUILD.gn +@@ -309,9 +309,6 @@ config("compiler") { + + configs += [ + # See the definitions below. +- ":clang_revision", +- ":rustc_revision", +- ":compiler_cpu_abi", + ":compiler_codegen", + ":compiler_deterministic", + ] +@@ -493,6 +490,9 @@ config("compiler") { + ldflags += [ "-fPIC" ] + rustflags += [ "-Crelocation-model=pic" ] + ++ extra_rustflags = getenv("RUSTFLAGS") ++ rustflags += [ extra_rustflags ] ++ + if (!is_clang) { + # Use pipes for communicating between sub-processes. Faster. + # (This flag doesn't do anything with Clang.) +@@ -568,63 +568,6 @@ config("compiler") { + ldflags += [ "-Wl,-z,keep-text-section-prefix" ] + } + +- if (is_clang && !is_nacl) { +- cflags += [ "-fcrash-diagnostics-dir=" + clang_diagnostic_dir ] +- if (save_reproducers_on_lld_crash && use_lld) { +- ldflags += [ +- "-fcrash-diagnostics=all", +- "-fcrash-diagnostics-dir=" + clang_diagnostic_dir, +- ] +- } +- +- # TODO(hans): Remove this once Clang generates better optimized debug info +- # by default. https://crbug.com/765793 +- cflags += [ +- "-mllvm", +- "-instcombine-lower-dbg-declare=0", +- ] +- if (!is_debug && use_thin_lto && is_a_target_toolchain) { +- if (is_win) { +- ldflags += [ "-mllvm:-instcombine-lower-dbg-declare=0" ] +- } else { +- ldflags += [ "-Wl,-mllvm,-instcombine-lower-dbg-declare=0" ] +- } +- } +- +- # TODO(crbug.com/40283598): This causes binary size growth and potentially +- # other problems. +- # TODO(crbug.com/40284925): This isn't supported by Cronet's mainline llvm version. +- if (default_toolchain != "//build/toolchain/cros:target" && +- !llvm_android_mainline) { +- cflags += [ +- "-mllvm", +- "-split-threshold-for-reg-with-hint=0", +- ] +- if (use_thin_lto && is_a_target_toolchain) { +- if (is_win) { +- ldflags += [ "-mllvm:-split-threshold-for-reg-with-hint=0" ] +- } else { +- ldflags += [ "-Wl,-mllvm,-split-threshold-for-reg-with-hint=0" ] +- } +- } +- } +- +- # TODO(crbug.com/40192287): Investigate why/if this should be needed. +- if (is_win) { +- cflags += [ "/clang:-ffp-contract=off" ] +- } else { +- cflags += [ "-ffp-contract=off" ] +- } +- +- # Enable ELF CREL (see crbug.com/357878242) for all platforms that use ELF +- # (excluding toolchains that use an older version of LLVM). +- # TODO(crbug.com/376278218): This causes segfault on Linux ARM builds. +- if (is_linux && !llvm_android_mainline && current_cpu != "arm" && +- default_toolchain != "//build/toolchain/cros:target") { +- cflags += [ "-Wa,--crel,--allow-experimental-crel" ] +- } +- } +- + # C11/C++11 compiler flags setup. + # --------------------------- + if (is_linux || is_chromeos || is_android || (is_nacl && is_clang) || +@@ -1045,20 +988,6 @@ config("compiler") { + # `-nodefaultlibs` from the linker invocation from Rust, which would be used + # to compile dylibs on Android, such as for constructing unit test APKs. + "-Cdefault-linker-libraries", +- +- # To make Rust .d files compatible with ninja +- "-Zdep-info-omit-d-target", +- +- # If a macro panics during compilation, show which macro and where it is +- # defined. +- "-Zmacro-backtrace", +- +- # For deterministic builds, keep the local machine's current working +- # directory from appearing in build outputs. +- "-Zremap-cwd-prefix=.", +- +- # We use clang-rt sanitizer runtimes. +- "-Zexternal-clangrt", + ] + + if (!is_win || force_rustc_color_output) { +@@ -1583,52 +1512,6 @@ config("compiler_deterministic") { + } + } + +- # Makes builds independent of absolute file path. +- if (is_clang && strip_absolute_paths_from_debug_symbols) { +- # If debug option is given, clang includes $cwd in debug info by default. +- # For such build, this flag generates reproducible obj files even we use +- # different build directory like "out/feature_a" and "out/feature_b" if +- # we build same files with same compile flag. +- # Other paths are already given in relative, no need to normalize them. +- if (is_nacl) { +- # TODO(https://crbug.com/1231236): Use -ffile-compilation-dir= here. +- cflags += [ +- "-Xclang", +- "-fdebug-compilation-dir", +- "-Xclang", +- ".", +- ] +- } else { +- # -ffile-compilation-dir is an alias for both -fdebug-compilation-dir= +- # and -fcoverage-compilation-dir=. +- cflags += [ "-ffile-compilation-dir=." ] +- +- # Convert absolute paths to relative paths. Expands to, for example: +- # -file-prefix-map /path/to/chromium/src=../.. +- swiftflags += [ +- "-file-prefix-map", +- rebase_path("//.", "") + "=" + rebase_path("//.", root_build_dir), +- ] +- } +- if (!is_win) { +- # We don't use clang -cc1as on Windows (yet? https://crbug.com/762167) +- asmflags = [ "-Wa,-fdebug-compilation-dir,." ] +- } +- +- if (is_win && use_lld) { +- if (symbol_level == 2 || (is_clang && using_sanitizer)) { +- # Absolutize source file paths for PDB. Pass the real build directory +- # if the pdb contains source-level debug information and if linker +- # reproducibility is not critical. +- ldflags += [ "/PDBSourcePath:" + rebase_path(root_build_dir) ] +- } else { +- # Use a fake fixed base directory for paths in the pdb to make the pdb +- # output fully deterministic and independent of the build directory. +- ldflags += [ "/PDBSourcePath:o:\fake\prefix" ] +- } +- } +- } +- + # Tells the compiler not to use absolute paths when passing the default + # paths to the tools it invokes. We don't want this because we don't + # really need it and it can mess up the RBE cache entries. +@@ -1647,40 +1530,6 @@ config("compiler_deterministic") { + } + } + +-config("clang_revision") { +- if (is_clang && clang_base_path == default_clang_base_path && +- current_os != "zos") { +- update_args = [ +- "--print-revision", +- "--verify-version=$clang_version", +- ] +- if (llvm_force_head_revision) { +- update_args += [ "--llvm-force-head-revision" ] +- } +- clang_revision = exec_script("//tools/clang/scripts/update.py", +- update_args, +- "trim string") +- +- # This is here so that all files get recompiled after a clang roll and +- # when turning clang on or off. (defines are passed via the command line, +- # and build system rebuild things when their commandline changes). Nothing +- # should ever read this define. +- defines = [ "CR_CLANG_REVISION=\"$clang_revision\"" ] +- } +-} +- +-config("rustc_revision") { +- if (rustc_revision != "") { +- # Similar to the above config, this is here so that all files get recompiled +- # after a rustc roll. Nothing should ever read this cfg. This will not be +- # set if a custom toolchain is used. +- rustflags = [ +- "--cfg", +- "cr_rustc_revision=\"$rustc_revision\"", +- ] +- } +-} +- + config("compiler_arm_fpu") { + if (current_cpu == "arm" && !is_ios && !is_nacl) { + cflags = [ "-mfpu=$arm_fpu" ] +@@ -2086,11 +1935,7 @@ config("chromium_code") { + defines = [ "_HAS_NODISCARD" ] + } + } else { +- cflags = [ "-Wall" ] +- if (is_clang) { +- # Enable extra warnings for chromium_code when we control the compiler. +- cflags += [ "-Wextra" ] +- } ++ cflags = [ ] + + # In Chromium code, we define __STDC_foo_MACROS in order to get the + # C99 macros on Mac and Linux. +@@ -2099,24 +1944,6 @@ config("chromium_code") { + "__STDC_FORMAT_MACROS", + ] + +- if (!is_debug && !using_sanitizer && current_cpu != "s390x" && +- current_cpu != "s390" && current_cpu != "ppc64" && +- current_cpu != "mips" && current_cpu != "mips64" && +- current_cpu != "riscv64" && current_cpu != "loong64") { +- # Non-chromium code is not guaranteed to compile cleanly with +- # _FORTIFY_SOURCE. Also, fortified build may fail when optimizations are +- # disabled, so only do that for Release build. +- fortify_level = "2" +- +- # ChromeOS's toolchain supports a high-quality _FORTIFY_SOURCE=3 +- # implementation with a few custom glibc patches. Use that if it's +- # available. +- if (is_chromeos_device && !lacros_use_chromium_toolchain) { +- fortify_level = "3" +- } +- defines += [ "_FORTIFY_SOURCE=" + fortify_level ] +- } +- + if (is_apple) { + cflags_objc = [ "-Wimplicit-retain-self" ] + cflags_objcc = [ "-Wimplicit-retain-self" ] +@@ -2544,7 +2371,8 @@ config("default_stack_frames") { + # [0]: https://pinpoint-dot-chromeperf.appspot.com/job/147634a8be0000 + # [1]: https://pinpoint-dot-chromeperf.appspot.com/job/132bc772be0000 + # [2]: https://crrev.com/c/5447532 +-config("optimize") { ++config("optimize") { } ++config("xoptimize") { + if (is_win) { + # clang-cl's /O2 corresponds to clang's -O3, and really want -O2 for + # consistency with the other platforms. +@@ -2593,7 +2421,8 @@ config("optimize") { + } + + # Turn off optimizations. +-config("no_optimize") { ++config("no_optimize") { } ++config("xno_optimize") { + if (is_win) { + cflags = [ + "/Od", # Disable optimization. +@@ -2633,7 +2462,8 @@ config("no_optimize") { + # Turns up the optimization level. Used to explicitly enable -O2 instead of + # -Os for select targets on platforms that use optimize_for_size. No-op + # elsewhere. +-config("optimize_max") { ++config("optimize_max") { } ++config("xoptimize_max") { + if (is_nacl && is_nacl_irt) { + # The NaCl IRT is a special case and always wants its own config. + # Various components do: +@@ -2666,7 +2496,8 @@ config("optimize_max") { + # + # TODO(crbug.com/41259697) - rework how all of these configs are related + # so that we don't need this disclaimer. +-config("optimize_speed") { ++config("optimize_speed") { } ++config("xoptimize_speed") { + if (is_nacl && is_nacl_irt) { + # The NaCl IRT is a special case and always wants its own config. + # Various components do: +@@ -2695,7 +2526,8 @@ config("optimize_speed") { + } + } + +-config("optimize_fuzzing") { ++config("optimize_fuzzing") { } ++config("xoptimize_fuzzing") { + cflags = [ "-O1" ] + common_optimize_on_cflags + rustflags = [ "-Copt-level=1" ] + ldflags = common_optimize_on_ldflags +@@ -2826,7 +2658,8 @@ config("win_pdbaltpath") { + } + + # Full symbols. +-config("symbols") { ++config("symbols") { } ++config("xsymbols") { + rustflags = [] + configs = [] + if (is_win) { +@@ -2988,7 +2821,8 @@ config("symbols") { + # Minimal symbols. + # This config guarantees to hold symbol for stack trace which are shown to user + # when crash happens in unittests running on buildbot. +-config("minimal_symbols") { ++config("minimal_symbols") { } ++config("xminimal_symbols") { + rustflags = [] + if (is_win) { + # Functions, files, and line tables only. +@@ -3073,7 +2907,8 @@ config("minimal_symbols") { + # This configuration contains function names only. That is, the compiler is + # told to not generate debug information and the linker then just puts function + # names in the final debug information. +-config("no_symbols") { ++config("no_symbols") { } ++config("xno_symbols") { + if (is_win) { + ldflags = [ "/DEBUG" ] + +diff --git a/build/config/rust.gni b/build/config/rust.gni +index 5b7807a1b8..4b3acd300e 100644 +--- a/build/config/rust.gni ++++ b/build/config/rust.gni +@@ -79,7 +79,8 @@ declare_args() { + # + # TODO(crbug.com/40281834): Re-enable ThinLTO for Rust on LaCrOS + # TODO(b/300937673): Re-enable ThinLTO for Rust on ash-chrome +- toolchain_supports_rust_thin_lto = !is_chromeos ++ # toolchain_supports_rust_thin_lto = !is_chromeos ++ toolchain_supports_rust_thin_lto = false + + # Any extra std rlibs in your Rust toolchain, relative to the standard + # Rust toolchain. Typically used with 'rust_sysroot_absolute' |