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| author | Sergei Trofimovich <siarheit@google.com> | 2022-06-04 15:48:01 -0400 |
|---|---|---|
| committer | Paul Smith <psmith@gnu.org> | 2022-06-04 19:04:37 -0400 |
| commit | 621d3196fae94e9006a7e9c5ffdaf5ec209bf832 (patch) | |
| tree | 15cbbc7aa6f32400fd4c80a6704099584eb722bc /NEWS | |
| parent | e4b7ac21dc1663de1d901cda0b395d819b5c08ab (diff) | |
| download | make-git-621d3196fae94e9006a7e9c5ffdaf5ec209bf832.tar.gz | |
[SV 62100] Add '--shuffle' option support
Introduce non-deterministic ordering into goal and prerequisite
traversal to help tease out inconsistent failures that may happen
when running in parallel build mode.
Introduce second order into each dependency chain:
1. Existing order is syntactic order reachable via 'dep->next'
2. New order is shuffled order stored as 'dep->shuf' in each 'dep'
When updating goals and prerequisites and '--shuffle' is provided,
use the shuffled order to walk the graph. When automatic variable
are set always use the syntactic order of parameters.
* Makefile.am: Add new src/shuffle.c and src/shuffle.h file.
* build_w32.bat: Ditto.
* builddos.bat: Ditto.
* makefile.com: Ditto.
* po/POTFILES.in: Ditto.
* doc/make.texi: Add documentation for --shuffle.
* doc/make.1: Ditto.
* src/dep.h (DEP): Add the shuf pointer.
* src/filedef.h (struct file): Add was_shuffled flag.
* src/main.c: (shuffle_mode): Global flag for the shuffle mode.
(usage): Add the --shuffle option.
(switches): Ditto.
(main): Set shuffle_mode based on the command line parameter.
Reshuffle prerequisites if requested.
* src/remake.c (update_goal_chain): Walk the shuffled list if enabled.
(update_file_1): Ditto.
* src/shuffle.h: Provide an interface for shuffling prerequisites.
* src/shuffle.c: Implement option parsing and prerequisite shuffling.
* tests/scripts/options/shuffle: Test shuffle option and modes.
Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 7 |
1 files changed, 7 insertions, 0 deletions
@@ -61,6 +61,13 @@ https://sv.gnu.org/bugs/index.php?group=make&report_id=111&fix_release_id=109&se avoiding the need for heuristics. Implementation provided by Sven C. Dack <sdack@gmx.com> +* New feature: The --shuffle command line option + This option reorders goals and prerequisites to simulate non-determinism + that may be seen using parallel build. Shuffle mode allows a form of "fuzz + testing" of parallel builds to verify that all prerequisites are correctly + described in the makefile. + Implementation provided by Sergei Trofimovich <siarheit@google.com> + * GNU make has sometimes chosen unexpected, and sub-optimal, chains of implicit rules due to the definition of "ought to exist" in the implicit rule search algorithm, which considered any prerequisite mentioned in the |