Merge pull request #575 from hofbi/add_extra_flags_per_feature

Add extra_flags_per_feature to cc toolchain

Author: mergify[bot]

toolchains/cc/cc.bzl

@@ -20,14 +20,14 @@ using `nixpkgs_cc_configure(..., cc_lang = "cuda")` or similar.
 * [nixpkgs_cc_configure](#nixpkgs_cc_configure)
 """
 
+load("@bazel_skylib//lib:sets.bzl", "sets")
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
 load(
     "@bazel_tools//tools/cpp:lib_cc_configure.bzl",
     "get_cpu_value",
     "get_starlark_list",
     "write_builtin_include_directory_paths",
 )
-load("@bazel_skylib//lib:sets.bzl", "sets")
 load("@rules_nixpkgs_core//:nixpkgs.bzl", "nixpkgs_package")
 load(
     "@rules_nixpkgs_core//:util.bzl",
@@ -78,6 +78,7 @@ def _parse_cc_toolchain_info(content, filename):
         "COVERAGE_COMPILE_FLAGS",
         "COVERAGE_LINK_FLAGS",
         "SUPPORTS_START_END_LIB",
+        "EXTRA_FLAGS_PER_FEATURE",
         "IS_CLANG",
         "CONLY_FLAGS",
     ])
@@ -118,6 +119,7 @@ def _parse_cc_toolchain_info(content, filename):
         coverage_compile_flags = info["COVERAGE_COMPILE_FLAGS"],
         coverage_link_flags = info["COVERAGE_LINK_FLAGS"],
         supports_start_end_lib = info["SUPPORTS_START_END_LIB"] == ["True"],
+        extra_flags_per_feature = info["EXTRA_FLAGS_PER_FEATURE"],
         is_clang = info["IS_CLANG"] == ["True"],
         conly_flags = info["CONLY_FLAGS"],
     )
@@ -219,6 +221,7 @@ def _nixpkgs_cc_toolchain_config_impl(repository_ctx):
             "%{coverage_compile_flags}": get_starlark_list(info.coverage_compile_flags),
             "%{coverage_link_flags}": get_starlark_list(info.coverage_link_flags),
             "%{supports_start_end_lib}": repr(info.supports_start_end_lib),
+            "%{extra_flags_per_feature}": repr(info.extra_flags_per_feature),
             "%{conly_flags}": get_starlark_list(info.conly_flags),
         },
     )

toolchains/cc/cc.nix

@@ -298,6 +298,7 @@ pkgs.runCommand "bazel-${cc.orignalName or cc.name}-toolchain"
         if [[ -x ${cc}/bin/ld.gold ]]; then echo True; else echo False; fi
       )
     )
+    EXTRA_FLAGS_PER_FEATURE=()
     IS_CLANG=(
       ${if cc.isClang then "True" else "False"}
     )
@@ -332,6 +333,7 @@ pkgs.runCommand "bazel-${cc.orignalName or cc.name}-toolchain"
     write_info COVERAGE_COMPILE_FLAGS
     write_info COVERAGE_LINK_FLAGS
     write_info SUPPORTS_START_END_LIB
+    write_info EXTRA_FLAGS_PER_FEATURE
     write_info IS_CLANG
     write_info CONLY_FLAGS
   ''