[all-commits] [llvm/llvm-project] a16511: [clang][modules-driver] Precompile std modules ind...

[Naveen Seth Hanig via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a16511c2d9697e7c5a9a9bc10948762666573c3c
      https://github.com/llvm/llvm-project/commit/a16511c2d9697e7c5a9a9bc10948762666573c3c
  Author: Naveen Seth Hanig <naveen.hanig at outlook.com>
  Date:   2026-05-28 (Thu, 28 May 2026)

  Changed paths:
    M clang/include/clang/Driver/Types.def
    M clang/lib/Driver/Driver.cpp
    M clang/lib/Driver/ModulesDriver.cpp
    M clang/lib/Driver/ToolChains/Clang.cpp
    M clang/lib/Driver/Types.cpp
    M clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
    M clang/test/Driver/modules-driver-dep-graph-stdlib-modules.cpp
    M clang/test/Driver/modules-driver-import-std.cpp

  Log Message:
  -----------
  [clang][modules-driver] Precompile std modules independently of -o and final phase (#199289)

With this, Standard library modules are always precompiled as the
primary output of their `-cc1` invocation, instead of being produced as
a byproduct of compiling the Standard library modules to object files.

This also keeps Standard library module precompilation independent of
the final phase specified on the command line, so importing them keep
working under `-fsyntax-only` (and other command-line options that
specify the final phase).

This also makes the Standard library module precompilation independent
of the `-o` flag, so that a command like `clang -std=c++23
-fmodules-driver main.cpp -o main` no longer redirects the Standard
library module outputs to 'main', breaking the compilation.



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