Remove all warnings features

All warnings features are now defined within `score_cpp_policies`
so we have to remove them from here.

Author: nradakovic

docs/features.md

@@ -88,12 +88,11 @@ the relevant build mode is active. All are enabled by default except where noted
   requires static system archives (unavailable on some toolchains, e.g. AutoSD).
 
 ## Warnings
-Opt-in / disabled by default unless noted otherwise.
-- **`minimal_warnings`** (both) — Baseline warning set (includes `-Wall`).
-  Enabled by default on QNX; opt-in (disabled by default) on Linux.
-- **`strict_warnings`** (both) — Stricter warnings; implies `minimal_warnings`.
-- **`all_wall_warnings`** (Linux) — Broadest warning set; implies `strict_warnings`.
-- **`warnings_as_errors`** (both) — Adds `-Werror`.
+**Note:** Warning-level features (`minimal_warnings`, `strict_warnings`, `all_wall_warnings`, `warnings_as_errors`)
+have been migrated to [`score_cpp_policies`](https://github.com/eclipse-score/score_cpp_policies).
+
+These features are no longer defined by this toolchain but can be provided through *feature injection* via
+the `extra_known_features` / `extra_enabled_features` attributes on `gcc.toolchain(...)`.
 
 ## Sanitizers (Linux, opt-in)
 Sanitizers are **not** defined by this toolchain. They are provided as

docs/test_suite.md

@@ -43,59 +43,48 @@ These tests verify that specific toolchain features are correctly implemented an
    - Tests `-iquote` quote search paths
    - Verifies `-isystem` system include paths
 
-3. **`warnings_test`** - Warning level configuration
-   - Tests strict_warnings, minimal_warnings, warnings_as_errors features
-   - Includes code patterns that trigger specific warnings
-
-4. **`warning_override_test`** - Warning feature override via user flags
-   - Regression test verifying user flags (copts) can override enabled warning features
-   - Enables both `strict_warnings` and `warnings_as_errors` features (making warnings into errors)
-   - Provides conflicting `-Wno-shadow` via copts to override the warning
-   - Validates that the flag ordering is correct: user_compile_flags comes after warning features,
-     ensuring user flags take precedence. If ordering regresses, compilation will fail with an error.
-
-5. **`coverage_test`** - Code coverage instrumentation
+3. **`coverage_test`** - Code coverage instrumentation
    - Verifies code coverage instrumentation flags are applied
    - Provides multiple code paths for coverage analysis
    - Can be analyzed with: `bazel coverage --combined_report=lcov //feature_verification:coverage_test`
 
-6. **`pic_test`** - Position-Independent Code (`-fPIC`)
+4. **`pic_test`** - Position-Independent Code (`-fPIC`)
    - Tests -fPIC flag is correctly applied
    - Validates position-independent code patterns
    - Tests polymorphism, static variables, and C linkage with PIC
 
-7. **`pthread_test`** - POSIX threading support
+5. **`pthread_test`** - POSIX threading support
    - Verifies `-lpthread` correctly links pthread library
    - Tests thread creation, synchronization, and joining
    - Validates multiple threads can safely access shared state
 
-8. **`multifile_test`** - Multi-file compilation and archiving
+6. **`multifile_test`** - Multi-file compilation and archiving
    - Tests multiple source files compile into separate object files
    - Validates object files are combined by archiver into static libraries
    - Complex operations across multiple object files link correctly
 
-9. **`whole_archive_test`** - Whole-archive linking (`-Wl,--whole-archive`)
+7. **`whole_archive_test`** - Whole-archive linking (`-Wl,--whole-archive`)
    - Verifies `-Wl,--whole-archive` and `-Wl,--no-whole-archive` work
    - Tests unused library symbols are linked when using whole-archive
 
-10. **`preprocessor_defines_test`** - `preprocessor_defines` feature
+8. **`preprocessor_defines_test`** - `preprocessor_defines` feature
    - Injects defines via the `local_defines` attribute (routed through the
      `preprocessor_defines` feature), unlike `defines_test` which uses `copts`
      (routed through `user_compile_flags`)
 
-11. **`include_dir_test`** - `include_paths` via the `includes` attribute
+9. **`include_dir_test`** - `include_paths` via the `includes` attribute
     - Includes a header exposed through a library's `includes` attribute,
       exercising the `-I`/`-isystem` search paths
 
-12. **`user_link_flags_test`** - `user_link_flags` feature
+10. **`user_link_flags_test`** - `user_link_flags` feature
     - Passes a linker flag through `linkopts` (`-Wl,--defsym=...`) and checks the
       injected symbol's address at runtime
 
-13. **`random_seed_test`** - `random_seed` feature
+11. **`random_seed_test`** - `random_seed` feature
     - Build-and-run smoke test exercising internal-linkage symbols governed by
       the reproducible-build random seed
 
-14. **`fully_static_link_test`** - `fully_static_link` feature (`-static`)
+12. **`fully_static_link_test`** - `fully_static_link` feature (`-static`)
     - Verifies no shared objects are mapped at runtime (fully static binary)
     - Marked incompatible with toolchains lacking static system archives (AutoSD)
 
@@ -286,16 +275,16 @@ when the host equals the target).
 
 ### All tests on the host (`//...`)
 ```
-Executed 20 tests: 20 passed
+Executed 17 tests: 17 passed
 ```
 
 ### Feature Verification Tests
-- The `feature_verification_tests` suite aggregates 13 tests. `warnings_test`
-  is defined separately and is picked up by wildcard targets such as
-  `//feature_verification/...`.
+- The `feature_verification_tests` suite aggregates 11 tests.
+  **Note:** Warning-level tests (`warnings_test`, `warning_override_test`) have been migrated to
+  [`score_cpp_policies`](https://github.com/eclipse-score/score_cpp_policies).
 - Expected output for the suite:
   ```
-  Executed 13 tests: 13 passed
+  Executed 11 tests: 11 passed
   ```
 
 ### Language and Standards Tests
@@ -324,8 +313,6 @@ tests/
 │   ├── user_link_flags_test.cpp
 │   ├── random_seed_test.cpp
 │   ├── fully_static_link_test.cpp
-│   ├── warnings_test.cpp
-│   ├── warning_override_test.cpp
 │   ├── coverage_test.cpp
 │   ├── pic_test_lib.h/cpp, pic_test.cpp
 │   ├── multifile_lib.h and multifile_lib_*.cpp

templates/linux/cc_toolchain_config.bzl.template

@@ -39,16 +39,6 @@ load(":flags.bzl",
     "DEFAULT_LINK_FLAGS",
     "DBG_COMPILE_FLAGS",
     "OPT_COMPILE_FLAGS",
-    "MINIMAL_WARNINGS_FLAGS",
-    "MINIMAL_C_WARNINGS_FLAGS",
-    "MINIMAL_CXX_WARNINGS_FLAGS",
-    "STRICT_WARNINGS_FLAGS",
-    "STRICT_C_WARNINGS_FLAGS",
-    "STRICT_CXX_WARNINGS_FLAGS",
-    "ALL_WALL_WARNINGS",
-    "ALL_WALL_C_WARNINGS",
-    "ALL_WALL_CXX_WARNINGS",
-    "WARNINGS_AS_ERRORS",
 )
 
 all_cpp_compile_actions = [
@@ -292,76 +282,6 @@ def _impl(ctx):
         ],
     )
 
-    minimal_warnings_feature = feature(
-        name = "minimal_warnings",
-        enabled = False,
-        flag_sets = [
-            flag_set(
-                actions = all_compile_actions,
-                flag_groups =  MINIMAL_WARNINGS_FLAGS,
-            ),
-            flag_set(
-                actions = all_c_compile_actions,
-                flag_groups = MINIMAL_C_WARNINGS_FLAGS,
-            ),
-            flag_set(
-                actions = all_cpp_compile_actions,
-                flag_groups =  MINIMAL_CXX_WARNINGS_FLAGS,
-            ),
-        ],
-    )
-
-    strict_warnings_feature = feature(
-        name = "strict_warnings",
-        implies = ["minimal_warnings"],
-        enabled = False,
-        flag_sets = [
-            flag_set(
-                actions = all_compile_actions,
-                flag_groups = STRICT_WARNINGS_FLAGS,
-            ),
-            flag_set(
-                actions = all_cpp_compile_actions,
-                flag_groups = STRICT_CXX_WARNINGS_FLAGS,
-            ),
-            flag_set(
-                actions = all_c_compile_actions,
-                flag_groups = STRICT_C_WARNINGS_FLAGS,
-            ),
-        ],
-    )
-
-    all_wall_warnings_feature = feature(
-        name = "all_wall_warnings",
-        implies = ["strict_warnings"],
-        enabled = False,
-        flag_sets = [
-            flag_set(
-                actions = all_compile_actions,
-                flag_groups = ALL_WALL_WARNINGS,
-            ),
-            flag_set(
-                actions = all_c_compile_actions,
-                flag_groups = ALL_WALL_C_WARNINGS,
-            ),
-            flag_set(
-                actions = all_cpp_compile_actions,
-                flag_groups = ALL_WALL_CXX_WARNINGS,
-            ),
-        ],
-    )
-
-    warnings_as_errors_feature = feature(
-        name = "warnings_as_errors",
-        enabled = False,
-        flag_sets = [
-            flag_set(
-                actions = all_compile_actions,
-                flag_groups = WARNINGS_AS_ERRORS,
-            ),
-        ],
-    )
-
     extra_compile_flags = %{extra_compile_flags}
     extra_compile_flags_feature = feature(
         name = "extra_compile_flags",
@@ -1024,10 +944,9 @@ def _impl(ctx):
         random_seed_feature,
         include_paths_feature,
         preprocessor_defines_feature,
-        minimal_warnings_feature,
-        strict_warnings_feature,
-        all_wall_warnings_feature,
-        warnings_as_errors_feature,
+        extra_compile_flags_feature,
+        extra_c_compile_flags_feature,
+        extra_cxx_compile_flags_feature,
         user_compile_flags_feature,
         compiler_input_flags_feature,
         compiler_output_flags_feature,
@@ -1051,9 +970,6 @@ def _impl(ctx):
         fully_static_link_feature,
         sysroot_link_flags_feature,
         pthread_feature,
-        extra_compile_flags_feature,
-        extra_c_compile_flags_feature,
-        extra_cxx_compile_flags_feature,
         extra_link_flags_feature,
         opt_feature,
         supports_dynamic_linker_feature,