FEATURE-ci-macos-make-fixture: preserve canonical make frontend identity

Use POSIX exec launchers for named fixture aliases so Apple's tool frontend retains its canonical invocation name. Preserve arguments, selected MAKE values and the deliberately unusable default.\n\nVerified actual native RED, corrected-fixture counterfactual RED against c2d5c62 (3 expected failures), current-driver GREEN (3 pass), 22 preservation checks, launcher argument/status and syntax checks. Native repaired macOS confirmation remains CI owned; production driver is unchanged.

Author: etr

scripts/test-v3-installed-consumer.py

@@ -6,6 +6,7 @@
 import json
 import os
 from pathlib import Path
+import shlex
 import shutil
 import signal
 import socket
@@ -76,8 +77,12 @@ def exercise_selection(self, selection, *, broken_default=False, ambient_make=No
         bad_make = tools / 'unselected-make'
         bad_make.write_text('#!/bin/sh\necho unselected-make >&2\nexit 1\n')
         bad_make.chmod(0o755)
-        (tools / 'make').symlink_to(bad_make if broken_default else self.gnu_make)
-        (tools / 'gmake').symlink_to(self.gnu_make)
+        # Apple's developer-tool frontend dispatches by its invoked name.
+        for name, target in (('make', bad_make if broken_default else self.gnu_make),
+                             ('gmake', self.gnu_make)):
+            launcher = tools / name
+            launcher.write_text('#!/bin/sh\nexec ' + shlex.quote(str(target)) + ' "$@"\n')
+            launcher.chmod(0o755)
         args = SimpleNamespace(make=selection, compiler=shutil.which('c++'), cc=shutil.which('cc'),
             jobs=1, prerequisite_prefix=[], pkg_config_dir=[], provider_prefix=root,
             toolchain_prefix=None, optimized=False)

specs/tasks/FEATURE-ci-macos-make-fixture.md

@@ -0,0 +1,78 @@
+# FEATURE-ci-macos-make-fixture: preserve make frontend identity in fixture aliases
+
+Status: In Progress — implementation ready; caller validation/finalization pending.
+Base: local `v3` at `9b93ebe8eb355b6da6099f8ed7764cda8c23bb90`.
+
+Native macOS package job `120582231719` and archive Darwin job `120582524154`
+both fail the new named `gmake` regression during real configure. Their
+61-test fixture suites report one failure and three skips. Canonical GNU make
+version detection and absolute/default selections succeed; renaming Apple's
+developer-tool frontend through a `gmake` symlink makes its name-sensitive
+dispatch fail to locate `gmake`.
+
+The fixture now creates executable POSIX launchers for its `make` and `gmake`
+PATH entries. Each launcher execs the shell-quoted original tool path with
+`"$@"`, preserving the tool's invocation identity and argument boundaries.
+The broken default still executes the deliberately failing unselected tool.
+Selected MAKE values, ambient conflicts, real configure/dependency generation,
+compile/install/check behavior and assertions remain intact. The production
+driver, including both selected-MAKE environment assignments, is byte-identical
+to the base. No dependency, platform skip, workflow or production change.
+
+Action items:
+
+- [x] Read the plan, literal journal, both actual native failure logs and complete fixture before editing.
+- [x] Create the isolated Groundwork worktree from the exact local v3 base; preserve unrelated work.
+- [x] Record the actual native regression as RED before the minimal launcher repair.
+- [x] Replace renamed frontend symlinks with canonical-tool exec launchers.
+- [x] With the corrected fixture, run all three real Autoconf cases against the original pre-MAKE-fix driver as counterfactual RED.
+- [x] Run the same three cases against the current unchanged driver as GREEN; retain actual dependency and exact MAKE receipts.
+- [x] Verify relevant preservation tests, launcher syntax/argument/status behavior, Python syntax and diff checks.
+- [x] Retain raw evidence, executed sources, source bindings, versions and verification limits.
+- [ ] Caller: complete required Groundwork validation and local finalization into `v3`.
+- [ ] CI / v3 PR: confirm repaired fixture on native macOS package/archive jobs.
+
+Verification: 22 existing installed-shell, ps and matrix contracts pass before
+and after the repair. The corrected fixture with the exact original driver
+from `c2d5c626f456f218676a6d840c8ed1442aa28438` fails all three cases in real
+`config.status` dependency-fragment bootstrapping (expected RED). With the
+current driver all three pass in 7.083s: actual configure, compile and install
+succeed, then the deliberate check failure reaches the required marker.
+`.deps/probe.Po` includes `probe.h`; build, install and check receipts retain
+exactly `gmake`, `/usr/bin/gmake` or `make` for their respective selections.
+The named case still has an unusable PATH default; the absolute/default cases
+still override a conflicting inherited MAKE.
+
+Both real valid launchers also execute a GNU make target containing spaces
+through `-f -`, preserve its output and propagate GNU make's exit2 from the
+deliberate recipe exit17. All captured shell launchers pass `/bin/sh -n`;
+`python3 -m py_compile scripts/test-v3-installed-consumer.py` and
+`git diff --check` pass. No Python linter is configured in repository guidance.
+No full baseline, broad retry, unrelated repair or old runtime diagnosis was
+performed. Native repaired macOS proof remains incomplete and CI/v3-PR owned;
+local Linux proof does not claim Apple frontend execution.
+
+The main repository's ignored `.debug/ci-macos-make-fixture-fdno1_wr/` retains
+the literal journal, native logs, before/after preservation logs, source-bound
+`baseline-actual-configure/` and `fixed-actual-configure/` projects/commands,
+launcher contract output and versions. The evidence harness reuses the prior
+task's actual execution setup, imports the registered test class and executes
+the original driver blob in its normal module with the original file binding.
+It does not model configure or the macOS frontend.
+
+SHA256 bindings: final fixture
+`88ca80f1759e5784534dd458da374814dc76b47652efc851e742877fced393a3`;
+original driver
+`61ef4487227c4196fbb7fb486e90b3bba255452e678ba47e8754ed8fa0383bc8`;
+unchanged current driver
+`6c565c7a7c3af16d46edc126638384fe15d81b8d7c36c098bb2661ec593dafb4`.
+
+Project notes / task-executor memory: v3 uses Autotools/C++20; this test-only
+repair needs no provider/full library setup. Focused checks use
+`python3 scripts/test-v3-installed-consumer.py InstalledMakeTest InstalledShellTest InstalledShellPSTest MatrixTest`
+and Python compilation. The real fixture uses `autoreconf --install --force`,
+Autoconf2.71, Automake1.16.5, GNU Make4.3, GCC13.3.0 and Python3.12.3 locally.
+Its existing script registration/distribution remains sufficient. Groundwork's
+identity helper resolves the worktree/branch; git metadata requires sandbox
+escalation. Preserve canonical frontend invocation names with exec launchers
+rather than renamed symlinks. No merge, push or CI cancellation by executor.