Refactor preprocessing arguments across toolchain configs

[brondani]

Fixes

• [Bug]: compile_macros.h causes many false errors from clangd for C++ codes cmsis-toolbox#625
• compile_macros.h ignores configured language standard vscode-cmsis-solution#335

Aligns with Open-CMSIS-Pack/cbuild2cmake#503

Changes

• Refactor preprocessing command construction in the AC6, Clang, TI Clang, GCC, and XC toolchain CMake configurations by moving the -xc language option from the shared CPP_FLAGS variable into the linker script preprocessing command (CPP_ARGS_LD_SCRIPT).
• Simplify predefined macro dump command definitions by removing the output file redirection/path from CPP_DUMP_MACROS in the AC6, Clang, TI Clang, GCC, XC, and IAR toolchain configurations, leaving only the compiler arguments.
• Language-specific and common compiler options to macro dump commands will be handled in generated CMakeLists.

Checklist

• 🤖 This change is covered by unit tests (if applicable).
• 🤹 Manual testing has been performed (if necessary).
• 🛡️ Security impacts have been considered (if relevant).
• 📖 Documentation updates are complete (if required).
• 🧠 Third-party dependencies and TPIP updated (if required).

Risk / Follow-up

These changes affect how preprocessing commands are assembled for multiple supported toolchains. The primary risk is regressions in linker script preprocessing or predefined macro generation, so validating build generation across the affected toolchains is recommended.

[github-actions]

Test Results

  5 files   39 suites   3m 8s ⏱️
185 tests 168 ✅ 17 💤 0 ❌
509 runs  458 ✅ 51 💤 0 ❌

Results for commit 00a9696.

♻️ This comment has been updated with latest results.

[Copilot]

Pull request overview

Refactors how C preprocessor-related command fragments are defined in the toolchain CMake config templates, aiming to centralize/standardize linker-script preprocessing and predefined-macro dump command construction across multiple toolchains (in line with related upstream work).

Changes:

• Moves the -xc language selection out of shared CPP_FLAGS and into the linker-script preprocessing invocation (CPP_ARGS_LD_SCRIPT) for AC6, Clang, TI Clang, GCC, and XC.
• Simplifies predefined-macro dump command fragments (CPP_DUMP_MACROS) by removing the output path handling from toolchain configs (IAR uses --predef_macros; others previously used > redirection).

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
tools/buildmgr/cbuildgen/config/XC.5.0.0.cmake	Adjusts XC32 preprocessor flags and macro-dump command fragment.
tools/buildmgr/cbuildgen/config/IAR.9.32.1.cmake	Simplifies IAR macro-dump command fragment by removing the output filename.
tools/buildmgr/cbuildgen/config/GCC.10.3.1.cmake	Moves -xc to linker-script preprocessing args; updates macro-dump fragment.
tools/buildmgr/cbuildgen/config/CLANG.17.0.1.cmake	Moves -xc to linker-script preprocessing args; updates macro-dump fragment.
tools/buildmgr/cbuildgen/config/CLANG_TI.4.0.1.cmake	Moves -xc to linker-script preprocessing args; updates macro-dump fragment.
tools/buildmgr/cbuildgen/config/AC6.6.16.2.cmake	Moves -xc to linker-script preprocessing args; updates macro-dump fragment.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 65.33%. Comparing base (b4297d8) to head (00a9696).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2530      +/-   ##
==========================================
- Coverage   65.36%   65.33%   -0.03%     
==========================================
  Files         147      147              
  Lines       26800    26768      -32     
  Branches    16236    16214      -22     
==========================================
- Hits        17517    17489      -28     
+ Misses       7076     7074       -2     
+ Partials     2207     2205       -2     

Flag	Coverage Δ
buildmgr-cov	79.87% <ø> (ø)

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see 1 file with indirect coverage changes

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[soumeh01]

LGTM