incompatible_disable_cc_configuration_make_variables: Disallow using C++ Specific Make Variables from the configuration #6381
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Baseline: ac88041 Cherry picks: + 9bc3b20: Fix the "nojava" platform and enable full presubmit checks for the various JDK platforms now that we have enough GCE resources. + 54c2572: Add openjdk_linux_archive java_toolchain for nojava platform. + 20bfdc6: Automated rollback of commit 19a401c. + 914b4ce: Windows: Fix Precondition check for addDynamicInputLinkOptions + 83d406b: Windows, test-setup.sh: Setting RUNFILES_MANIFEST_FILE only when it exists. + e025726: Update turbine + 5f312dd: Fix event id for action_completed BEP events The Bazel team is happy to announce a new version of Bazel, [Bazel 0.19](https://github.com/bazelbuild/bazel/releases/tag/0.19.0). This document lists the major changes since Bazel 0.18. General changes --------------- * The `--incompatible_expand_directories` flag will automatically expand directories in command lines. Design doc: https://docs.google.com/document/d/11agWFiOUiz2htBLj6swPTob5z78TrCxm8DQE4uJLOwM * The `--loading_phase_threads` flag now defaults to `auto` (not 200, as was previously the case), which at the moment corresponds to the number of CPUs. This is appropriate for most users. However, if your sources reside on a network file system, increasing this value may yield better analysis-time performance when disk caches are cold. Android ------- * Fixed missing debug symbols when building native code with `--compilation_mode=dbg` that target Android ARM architectures by adding the `-g` flag. C++ --- * Added `--incompatible_disable_legacy_flags_cc_toolchain_api` to deprecate legacy `cc_toolchain` Starlark API for legacy CROSSTOOL fields. Tracking issue is #6434. Migration docs are on the bazel website. * Runfiles in cc_test: the C++ runfiles library (`@bazel_tools//tools/cpp/runfiles`) can now create Runfiles objects for tests. See `//tools/cpp/runfiles/runfiles_src.h` (in the Bazel source tree) for documentation. * :cc_binary link action no longer hardcodes `-static-libgcc` for toolchains that support embedded runtimes (guarded by `--experimental_dont_emit_static_libgcc` temporarily). * The flag `--experimental_enable_cc_configuration_make_variables` is removed, use `--incompatible_disable_cc_configuration_make_variables` instead. Java ---- * If the `--javabase` flag is unset, Bazel locates a JDK using the `JAVA_HOME` environment variable and searching the PATH. If no JDK is found `--javabase` will be empty, and builds targeting Java will not be supported. Previously Bazel would fall back to using the embedded JDK as a `--javabase`, but this is no longer default behaviour. A JDK should be explicitly installed instead to enable Java development. Code Coverage ------------- * LcovMerger was renamed to CoverageOutputGenerator. * Faster coverage collection for gcc compiled C++ code can now be tested by enabling it with `--experimental_cc_coverage`. Other Changes ------------- * Add `--apple_compiler` and `--apple_grte_top options`. These provide the equivalent of --compiler / --grte_top for the toolchain configured in --apple_crosstool_top. * There is now a `same_pkg_direct_rdeps` query function. See the query documentation for more details. * Propagating remote errors to the user even if `--verbose_failures=false` is set. * Add number of configured targets to analysis phase status output. * Bazel will now check stderr instead of stdout to decide if it is outputting to a terminal. `--isatty` is deprecated, use `--is_stderr_atty` instead. Future Changes -------------- * None of the C++ related incompatible flags mentioned in the 0.18 release were flipped, they will be flipped in the next release (0.20). We have created tracking issues for all the relevant incompatible flags: * [`--incompatible_disable_late_bound_option_defaults`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#disable-late-bound-option-defaults): #6384 * [`--incompatible_disable_depset_in_cc_user_flags`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#disable-depsets-in-c-toolchain-api-in-user-flags): #6383 * [`--incompatible_disable_cc_toolchain_label_from_crosstool_proto`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#disallow-using-crosstool-to-select-the-cc_toolchain-label): #6382 * [`--incompatible_disable_cc_configuration_make_variables`](#6381): #6381 * [`--incompatible_disable_legacy_cpp_toolchain_skylark_api`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#disable-legacy-c-configuration-api): #6380 * [`incompatible_disable_legacy_flags_cc_toolchain_api`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#disable-legacy-c-toolchain-api): #6434 * In the 0.20 release the flags [`--incompatible_remove_native_git_repository`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#remove-native-git-repository) and [`--incompatible_remove_native_http_archive`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#remove-native-http-archive) will be turned on. Thank you to our contributors! ------------------------------ This release contains contributions from many people at Google, as well as Andreas Herrmann, Andreas Hippler, Benjamin Peterson, David Ostrovsky, Ed Baunton, George Gensure, Igal Tabachnik, Jason Gavris, Loo Rong Jie, rmalik, and Yannic Bonenberger Thank you to everyone who contributed to this release!
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Baseline: ac88041 Cherry picks: + 9bc3b20: Fix the "nojava" platform and enable full presubmit checks for the various JDK platforms now that we have enough GCE resources. + 54c2572: Add openjdk_linux_archive java_toolchain for nojava platform. + 20bfdc6: Automated rollback of commit 19a401c. + 914b4ce: Windows: Fix Precondition check for addDynamicInputLinkOptions + 83d406b: Windows, test-setup.sh: Setting RUNFILES_MANIFEST_FILE only when it exists. + e025726: Update turbine + 5f312dd: Fix event id for action_completed BEP events The Bazel team is happy to announce a new version of Bazel, [Bazel 0.19](https://github.com/bazelbuild/bazel/releases/tag/0.19.0). This document lists the major changes since Bazel 0.18. General changes --------------- * The `--incompatible_expand_directories` flag will automatically expand directories in command lines. Design doc: https://docs.google.com/document/d/11agWFiOUiz2htBLj6swPTob5z78TrCxm8DQE4uJLOwM * The `--loading_phase_threads` flag now defaults to `auto` (not 200, as was previously the case), which at the moment corresponds to the number of CPUs. This is appropriate for most users. However, if your sources reside on a network file system, increasing this value may yield better analysis-time performance when disk caches are cold. Android ------- * Fixed missing debug symbols when building native code with `--compilation_mode=dbg` that target Android ARM architectures by adding the `-g` flag. C++ --- * Added `--incompatible_disable_legacy_flags_cc_toolchain_api` to deprecate legacy `cc_toolchain` Starlark API for legacy CROSSTOOL fields. Tracking issue is bazelbuild#6434. Migration docs are on the bazel website. * Runfiles in cc_test: the C++ runfiles library (`@bazel_tools//tools/cpp/runfiles`) can now create Runfiles objects for tests. See `//tools/cpp/runfiles/runfiles_src.h` (in the Bazel source tree) for documentation. * :cc_binary link action no longer hardcodes `-static-libgcc` for toolchains that support embedded runtimes (guarded by `--experimental_dont_emit_static_libgcc` temporarily). * The flag `--experimental_enable_cc_configuration_make_variables` is removed, use `--incompatible_disable_cc_configuration_make_variables` instead. Java ---- * If the `--javabase` flag is unset, Bazel locates a JDK using the `JAVA_HOME` environment variable and searching the PATH. If no JDK is found `--javabase` will be empty, and builds targeting Java will not be supported. Previously Bazel would fall back to using the embedded JDK as a `--javabase`, but this is no longer default behaviour. A JDK should be explicitly installed instead to enable Java development. Code Coverage ------------- * LcovMerger was renamed to CoverageOutputGenerator. * Faster coverage collection for gcc compiled C++ code can now be tested by enabling it with `--experimental_cc_coverage`. Other Changes ------------- * Add `--apple_compiler` and `--apple_grte_top options`. These provide the equivalent of --compiler / --grte_top for the toolchain configured in --apple_crosstool_top. * There is now a `same_pkg_direct_rdeps` query function. See the query documentation for more details. * Propagating remote errors to the user even if `--verbose_failures=false` is set. * Add number of configured targets to analysis phase status output. * Bazel will now check stderr instead of stdout to decide if it is outputting to a terminal. `--isatty` is deprecated, use `--is_stderr_atty` instead. Future Changes -------------- * None of the C++ related incompatible flags mentioned in the 0.18 release were flipped, they will be flipped in the next release (0.20). We have created tracking issues for all the relevant incompatible flags: * [`--incompatible_disable_late_bound_option_defaults`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#disable-late-bound-option-defaults): bazelbuild#6384 * [`--incompatible_disable_depset_in_cc_user_flags`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#disable-depsets-in-c-toolchain-api-in-user-flags): bazelbuild#6383 * [`--incompatible_disable_cc_toolchain_label_from_crosstool_proto`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#disallow-using-crosstool-to-select-the-cc_toolchain-label): bazelbuild#6382 * [`--incompatible_disable_cc_configuration_make_variables`](bazelbuild#6381): bazelbuild#6381 * [`--incompatible_disable_legacy_cpp_toolchain_skylark_api`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#disable-legacy-c-configuration-api): bazelbuild#6380 * [`incompatible_disable_legacy_flags_cc_toolchain_api`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#disable-legacy-c-toolchain-api): bazelbuild#6434 * In the 0.20 release the flags [`--incompatible_remove_native_git_repository`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#remove-native-git-repository) and [`--incompatible_remove_native_http_archive`](https://docs.bazel.build/versions/master/skylark/backward-compatibility.html#remove-native-http-archive) will be turned on. Thank you to our contributors! ------------------------------ This release contains contributions from many people at Google, as well as Andreas Herrmann, Andreas Hippler, Benjamin Peterson, David Ostrovsky, Ed Baunton, George Gensure, Igal Tabachnik, Jason Gavris, Loo Rong Jie, rmalik, and Yannic Bonenberger Thank you to everyone who contributed to this release!
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Also make `--incompatible_disable_cc_configuration_make_variables` a noop. #6381 RELNOTES: None. PiperOrigin-RevId: 222280222
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… visible #6381 RELNOTES: None. PiperOrigin-RevId: 222393972
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Baseline: 7bf7f03 Cherry picks: + fd52341: update bazel-toolchains pin to latest release Part of changes to allow bazelci to use 0.19.0 configs. RBE toolchain configs at or before 0.17.0 are not compatible with bazel 0.19.0 or above. + 241f28d: Revert "Toggle --incompatible_disable_late_bound_option_defaults flag." + f7e5aef: Add cc_toolchain targets for the new entries in the default cc_toolchain_suite. + d2920e3: Revert "WindowsFileSystem: open files with delete-sharing" [Breaking changes in 0.20](https://github.com/bazelbuild/bazel/issues?q=is%3Aissue+label%3Abreaking-change-0.20) - [--incompatible_remove_native_http_archive](#6570). - [--incompatible_remove_native_git_repository](#6569). - [--incompatible_disable_cc_toolchain_label_from_crosstool_proto](#6434). - [--incompatible_disable_depset_in_cc_user_flags](#6384). - [--incompatible_disable_cc_configuration_make_variables](#6381). - [--incompatible_disallow_conflicting_providers](#5902). - [--incompatible_range_type](#5264). [0.20 is a migration window for the following changes](https://github.com/bazelbuild/bazel/issues?q=is%3Aissue+label%3Amigration-0.20) - [--incompatible_use_jdk10_as_host_javabase](#6661) - [--incompatible_use_remotejdk_as_host_javabase](#6656) - [--incompatible_disable_sysroot_from_configuration](#6565) - [--incompatible_provide_cc_toolchain_info_from_cc_toolchain_suite](#6537) - [--incompatible_disable_depset_in_cc_user_flags](#6383) - [--incompatible_package_name_is_a_function](#5827) [Breaking changes in the next release (0.21)](https://github.com/bazelbuild/bazel/issues?q=is%3Aissue+label%3Abreaking-change-0.21) - [--incompatible_use_jdk10_as_host_javabase](#6661) - [--incompatible_use_remotejdk_as_host_javabase](#6656) - [--incompatible_disable_sysroot_from_configuration](#6565) - [--incompatible_provide_cc_toolchain_info_from_cc_toolchain_suite](#6537) - [--incompatible_disable_depset_in_cc_user_flags](#6383) - [--incompatible_disallow_data_transition](#6153) - [--incompatible_package_name_is_a_function](#5827) - [--incompatible_disallow_slash_operator](#5823) - [--incompatible_static_name_resolution](#5637) Incompatible changes: - the --experimental_no_dotd_scanning_with_modules command line argument is not supported anymore. - The --prune_cpp_modules command line option is not supported anymore. - the --experimental_prune_cpp_input_discovery command line option is not supported anymore. New features: - Added support for Android NDK r18. Important changes: - The 'default' parameter of attr.output and attr.output_list is removed. This is controlled by --incompatible_no_output_attr_default - A number of platform-related Starlark APIs which were previously marked "experimental" are now disabled by default, and may be enabled via --experimental_platforms_api - Make legacy-test-support ("legacy_test-<api-level>") from android_sdk_repository neverlink. The legacy test support libraries shouldn't be built into test binaries. To make them available at runtime, developers should declare them via uses-library: https://developer.android.com/training/testing/set-up-project#andr oid-test-base - query remote server Capabilities (per REAPI v2) - CppRules: All cc_toolchains depended on from cc_toolchain_suite.toolchains are now analyzed when not using platforms in order to select the right cc_toolchain. - removed obsolete --explicit_jre_deps flag. - Incompatible flag --incompatible_disable_legacy_cpp_toolchain_skylark_api was flipped. - Improve error messaging when unsupport proguard options are specified at the library level. - Incompatible flag --incompatible_disable_legacy_cpp_toolchain_skylark_api was flipped. - Incompatible flag --incompatible_disable_legacy_cpp_toolchain_skylark_api was flipped. - The --incompatible_disable_late_bound_option_defaults flag has been flipped (#6384) - Incompatible flag --incompatible_disable_legacy_flags_cc_toolchain_api was flipped (#6434) - Fixed issue where ctx.resolve_command created conflicting intermediate files when resolve_command was called multiple times within the same rule invocation with a long command attribute. - Incompatible flag --incompatible_disable_cc_configuration_make_variables was flipped (#6381) - If the --javabase flag is unset, it Bazel locates a JDK using the JAVA_HOME environment variable and searching the PATH. If no JDK is found --javabase will be empty, and builds targeting Java will not be supported. Previously Bazel would fall back to using the embedded JDK as a --javabase, but this is no longer default behaviour. A JDK should be explicitly installed instead to enable Java development - Bazel will now shut down when idle for 5 minutes and the system is low on RAM (linux only). - CROSSTOOL file is now read from the package of cc_toolchain, not from the package of cc_toolchain_suite. This is not expected to break anybody since cc_toolchain_suite and cc_toolchain are commonly in the same package. - All overrides of Starlark's ctx.new_file function are now deprecated. Try the `--incompatible_new_actions_api` flag to ensure your code is forward-compatible. - --incompatible_disable_cc_toolchain_label_from_crosstool_proto was flipped. - Introduce --(no)shutdown_on_low_sys_mem startup flag to toggle idle low-memory shutdown, disabled by default. - --incompatible_disable_cc_toolchain_label_from_crosstool_proto was flipped. - --incompatible_disable_cc_toolchain_label_from_crosstool_proto was flipped. - CppRules: All cc_toolchains depended on from cc_toolchain_suite.toolchains are now analyzed when not using platforms in order to select the right cc_toolchain. - The function `attr.license` is deprecated and will be removed. It can be disabled now with `--incompatible_no_attr_license`. - `range()` function now returns a lazy value (`--incompatible_range_type` is now set by default). - The code coverage report now includes the actual paths to header files instead of the ugly, Bazel generated, virtual includes path. - `--incompatible_disallow_conflicting_providers` has been switched to true - Add new flag `--incompatible_disable_systool_from_configration` to disable loading the systool from CppConfiguration. - Add new flag `--incompatible_disable_sysroot_from_configuration` to disable loading the systool from CppConfiguration. - Sorting remote Platform properties for remote execution. May affect cache keys! - Use different server log files per Bazel server process; java.log is now a symlink to the latest log. This release contains contributions from many people at Google, as well as a7g4 <[email protected]>, Alan <[email protected]>, Asaf Flescher <[email protected]>, Benjamin Peterson <[email protected]>, Ed Schouten <[email protected]>, George Gensure <[email protected]>, George Kalpakas <[email protected]>, Greg <[email protected]>, Irina Iancu <[email protected]>, Keith Smiley <[email protected]>, Loo Rong Jie <[email protected]>, Mark Zeren <[email protected]>, Petros Eskinder <[email protected]>, rachcatch <[email protected]>, Robert Brown <[email protected]>, Robert Gay <[email protected]>, Salty Egg <[email protected]>.
ahirreddy
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Baseline: 7bf7f03 Cherry picks: + fd52341: update bazel-toolchains pin to latest release Part of changes to allow bazelci to use 0.19.0 configs. RBE toolchain configs at or before 0.17.0 are not compatible with bazel 0.19.0 or above. + 241f28d: Revert "Toggle --incompatible_disable_late_bound_option_defaults flag." + f7e5aef: Add cc_toolchain targets for the new entries in the default cc_toolchain_suite. + d2920e3: Revert "WindowsFileSystem: open files with delete-sharing" [Breaking changes in 0.20](https://github.com/bazelbuild/bazel/issues?q=is%3Aissue+label%3Abreaking-change-0.20) - [--incompatible_remove_native_http_archive](bazelbuild#6570). - [--incompatible_remove_native_git_repository](bazelbuild#6569). - [--incompatible_disable_cc_toolchain_label_from_crosstool_proto](bazelbuild#6434). - [--incompatible_disable_depset_in_cc_user_flags](bazelbuild#6384). - [--incompatible_disable_cc_configuration_make_variables](bazelbuild#6381). - [--incompatible_disallow_conflicting_providers](bazelbuild#5902). - [--incompatible_range_type](bazelbuild#5264). [0.20 is a migration window for the following changes](https://github.com/bazelbuild/bazel/issues?q=is%3Aissue+label%3Amigration-0.20) - [--incompatible_use_jdk10_as_host_javabase](bazelbuild#6661) - [--incompatible_use_remotejdk_as_host_javabase](bazelbuild#6656) - [--incompatible_disable_sysroot_from_configuration](bazelbuild#6565) - [--incompatible_provide_cc_toolchain_info_from_cc_toolchain_suite](bazelbuild#6537) - [--incompatible_disable_depset_in_cc_user_flags](bazelbuild#6383) - [--incompatible_package_name_is_a_function](bazelbuild#5827) [Breaking changes in the next release (0.21)](https://github.com/bazelbuild/bazel/issues?q=is%3Aissue+label%3Abreaking-change-0.21) - [--incompatible_use_jdk10_as_host_javabase](bazelbuild#6661) - [--incompatible_use_remotejdk_as_host_javabase](bazelbuild#6656) - [--incompatible_disable_sysroot_from_configuration](bazelbuild#6565) - [--incompatible_provide_cc_toolchain_info_from_cc_toolchain_suite](bazelbuild#6537) - [--incompatible_disable_depset_in_cc_user_flags](bazelbuild#6383) - [--incompatible_disallow_data_transition](bazelbuild#6153) - [--incompatible_package_name_is_a_function](bazelbuild#5827) - [--incompatible_disallow_slash_operator](bazelbuild#5823) - [--incompatible_static_name_resolution](bazelbuild#5637) Incompatible changes: - the --experimental_no_dotd_scanning_with_modules command line argument is not supported anymore. - The --prune_cpp_modules command line option is not supported anymore. - the --experimental_prune_cpp_input_discovery command line option is not supported anymore. New features: - Added support for Android NDK r18. Important changes: - The 'default' parameter of attr.output and attr.output_list is removed. This is controlled by --incompatible_no_output_attr_default - A number of platform-related Starlark APIs which were previously marked "experimental" are now disabled by default, and may be enabled via --experimental_platforms_api - Make legacy-test-support ("legacy_test-<api-level>") from android_sdk_repository neverlink. The legacy test support libraries shouldn't be built into test binaries. To make them available at runtime, developers should declare them via uses-library: https://developer.android.com/training/testing/set-up-project#andr oid-test-base - query remote server Capabilities (per REAPI v2) - CppRules: All cc_toolchains depended on from cc_toolchain_suite.toolchains are now analyzed when not using platforms in order to select the right cc_toolchain. - removed obsolete --explicit_jre_deps flag. - Incompatible flag --incompatible_disable_legacy_cpp_toolchain_skylark_api was flipped. - Improve error messaging when unsupport proguard options are specified at the library level. - Incompatible flag --incompatible_disable_legacy_cpp_toolchain_skylark_api was flipped. - Incompatible flag --incompatible_disable_legacy_cpp_toolchain_skylark_api was flipped. - The --incompatible_disable_late_bound_option_defaults flag has been flipped (bazelbuild#6384) - Incompatible flag --incompatible_disable_legacy_flags_cc_toolchain_api was flipped (bazelbuild#6434) - Fixed issue where ctx.resolve_command created conflicting intermediate files when resolve_command was called multiple times within the same rule invocation with a long command attribute. - Incompatible flag --incompatible_disable_cc_configuration_make_variables was flipped (bazelbuild#6381) - If the --javabase flag is unset, it Bazel locates a JDK using the JAVA_HOME environment variable and searching the PATH. If no JDK is found --javabase will be empty, and builds targeting Java will not be supported. Previously Bazel would fall back to using the embedded JDK as a --javabase, but this is no longer default behaviour. A JDK should be explicitly installed instead to enable Java development - Bazel will now shut down when idle for 5 minutes and the system is low on RAM (linux only). - CROSSTOOL file is now read from the package of cc_toolchain, not from the package of cc_toolchain_suite. This is not expected to break anybody since cc_toolchain_suite and cc_toolchain are commonly in the same package. - All overrides of Starlark's ctx.new_file function are now deprecated. Try the `--incompatible_new_actions_api` flag to ensure your code is forward-compatible. - --incompatible_disable_cc_toolchain_label_from_crosstool_proto was flipped. - Introduce --(no)shutdown_on_low_sys_mem startup flag to toggle idle low-memory shutdown, disabled by default. - --incompatible_disable_cc_toolchain_label_from_crosstool_proto was flipped. - --incompatible_disable_cc_toolchain_label_from_crosstool_proto was flipped. - CppRules: All cc_toolchains depended on from cc_toolchain_suite.toolchains are now analyzed when not using platforms in order to select the right cc_toolchain. - The function `attr.license` is deprecated and will be removed. It can be disabled now with `--incompatible_no_attr_license`. - `range()` function now returns a lazy value (`--incompatible_range_type` is now set by default). - The code coverage report now includes the actual paths to header files instead of the ugly, Bazel generated, virtual includes path. - `--incompatible_disallow_conflicting_providers` has been switched to true - Add new flag `--incompatible_disable_systool_from_configration` to disable loading the systool from CppConfiguration. - Add new flag `--incompatible_disable_sysroot_from_configuration` to disable loading the systool from CppConfiguration. - Sorting remote Platform properties for remote execution. May affect cache keys! - Use different server log files per Bazel server process; java.log is now a symlink to the latest log. This release contains contributions from many people at Google, as well as a7g4 <[email protected]>, Alan <[email protected]>, Asaf Flescher <[email protected]>, Benjamin Peterson <[email protected]>, Ed Schouten <[email protected]>, George Gensure <[email protected]>, George Kalpakas <[email protected]>, Greg <[email protected]>, Irina Iancu <[email protected]>, Keith Smiley <[email protected]>, Loo Rong Jie <[email protected]>, Mark Zeren <[email protected]>, Petros Eskinder <[email protected]>, rachcatch <[email protected]>, Robert Brown <[email protected]>, Robert Gay <[email protected]>, Salty Egg <[email protected]>.
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The documentation published here is incorrect. Accessing make variables still happens through |
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Thanks for reporting. Let me fix it :) |
bazel-io
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#6381 RELNOTES: None. PiperOrigin-RevId: 227196354
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Incompatible change.
Currently Bazel allows rule authors to access certain Make variables that are implicitly provided to every rule by the CppConfiguration. This causes every target to implicitly depend on CppConfiguration, which creates an undesirable number of extra, unused, dependencies.
We are removing the implicit provision of these Make variables, and requiring rules and targets that use these Make variables to explicitly depend on a C++ toolchain in order to access them.
Migration docs.
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