Landing: 619a5e558675
Project / Subsystem
gcc / driver
Date
2026-06-11
Author
Sunil Dora
Commit
619a5e5586759a3ed16baf1333728664b06b0451
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- driver
- patch_id
- —
- commit_hash
- 619a5e5586759a3ed16baf1333728664b06b0451
- source_type
- github
- headline
- Spill long COLLECT_GCC_OPTIONS to a response file
- tldr
- GCC's driver now writes excessively long `COLLECT_GCC_OPTIONS` to a temporary response file to circumvent operating system argument limits, preventing build fa…
- author
- Sunil Dora
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • build-system
- • driver
- • portability
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-06-11T00:00:00.000Z
Operating systems impose limits on the length of command-line arguments and environment variables. To prevent GCC builds from failing when the COLLECT_GCC_OPTIONS environment variable exceeds these limits (e.g., 128KB on Linux, 32KB on Windows), the compiler driver now automatically spills these options to a temporary response file. The driver then sets COLLECT_GCC_OPTIONS to @<path> to this file, which collect2, lto-wrapper, and lto-plugin transparently expand, ensuring that large option sets can be handled without breaking the build.