[all-commits] [llvm/llvm-project] 625fac: [Flang] Store only options in FLANG_COMPILER_OPTIO...

[Thirumalai Shaktivel via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 625facd4375f6bfa5de501d0559bd262062e2dc3
      https://github.com/llvm/llvm-project/commit/625facd4375f6bfa5de501d0559bd262062e2dc3
  Author: Thirumalai Shaktivel <74826228+Thirumalai-Shaktivel at users.noreply.github.com>
  Date:   2026-06-15 (Mon, 15 Jun 2026)

  Changed paths:
    M flang/test/Driver/compiler-options.f90
    M flang/tools/flang-driver/driver.cpp

  Log Message:
  -----------
  [Flang] Store only options in FLANG_COMPILER_OPTIONS_STRING (#201278)

Previously, FLANG_COMPILER_OPTIONS_STRING stored every argument passed
to the flang driver, including input file names. The GNU extension
compiler_options() is documented to return only the options, not the
input files. Including the input files also caused the string to exceed
ARG_MAX on large builds, producing:

    posix_spawn failed: Argument list too long

Use the driver's parsed InputArgList to filter out OPT_INPUT arguments,
preserving all options and their values (e.g. `-I /path`, `-o file`).

Fixes: https://github.com/llvm/llvm-project/issues/170651



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