gh-110276: No longer ignore PROFILE_TASK failure silently (#110295)

Author: vstinner

Doc/using/configure.rst

@@ -518,6 +518,9 @@ also be used to improve performance.
 
    .. versionadded:: 3.8
 
+   .. versionchanged:: 3.13
+      Task failure is no longer ignored silently.
+
 .. cmdoption:: --with-lto=[full|thin|no|yes]
 
    Enable Link Time Optimization (LTO) in any build (disabled by default).

Makefile.pre.in

@@ -657,7 +657,7 @@ profile-run-stamp:
 	$(MAKE) profile-gen-stamp
 	# Next, run the profile task to generate the profile information.
 	@ # FIXME: can't run for a cross build
-	$(LLVM_PROF_FILE) $(RUNSHARED) ./$(BUILDPYTHON) $(PROFILE_TASK) || true
+	$(LLVM_PROF_FILE) $(RUNSHARED) ./$(BUILDPYTHON) $(PROFILE_TASK)
 	$(LLVM_PROF_MERGER)
 	# Remove profile generation binary since we are done with it.
 	$(MAKE) clean-retain-profile
@@ -706,7 +706,7 @@ profile-bolt-stamp: $(BUILDPYTHON)
 	  mv "$${bin}.bolt_inst" "$${bin}"; \
 	done
 	# Run instrumented binaries to collect data.
-	$(RUNSHARED) ./$(BUILDPYTHON) $(PROFILE_TASK) || true
+	$(RUNSHARED) ./$(BUILDPYTHON) $(PROFILE_TASK)
 	# Merge all the data files together.
 	for bin in $(BOLT_BINARIES); do \
 	  @MERGE_FDATA@ $${bin}.*.fdata > "$${bin}.fdata"; \

Misc/NEWS.d/next/Build/2023-10-03-17-55-09.gh-issue-110276.luaKRg.rst

@@ -0,0 +1,2 @@
+No longer ignore :envvar:`PROFILE_TASK` failure silently: command used by
+Profile Guided Optimization (PGO). Patch by Victor Stinner.