gh-36829: CI Linux incremental: `make reconfigure` after uninstalling packages
    
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As observed in
#36792 (comment), the
"CI Linux incremental" workflow, which is run when package scripts are
updated, is not helpful when testing new or modified `spkg-configure.m4`
scripts when the SPKG has been installed:

Although we uninstall packages with changed spkg-configure.m4 scripts
already, a re-run of configure is not (always?) triggered.

So here we invoke it explicitly, using a new makefile target `make
reconfigure`.
(This new target also simplifies instructions issued by the system
package advice facility.)

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### ⌛ Dependencies

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URL: #36829
Reported by: Matthias Köppe
Reviewer(s): Kwankyu Lee, Matthias Köppe

Author: Release Manager

.github/workflows/ci-linux-incremental.yml

@@ -83,7 +83,7 @@ jobs:
       from_docker_target: "with-targets"
       from_docker_tag: "dev"
       docker_targets: "with-targets"
-      targets: "${{needs.changed_files.outputs.uninstall_targets}} ${{needs.changed_files.outputs.build_targets}} build doc-html ptest"
+      targets: "${{needs.changed_files.outputs.uninstall_targets}} reconfigure ${{needs.changed_files.outputs.build_targets}} build doc-html ptest"
       tox_system_factors: >-
         ["ubuntu-focal",
          "ubuntu-jammy",
@@ -119,7 +119,7 @@ jobs:
       from_docker_target: "with-targets"
       from_docker_tag: "dev"
       docker_targets: "with-targets"
-      targets: "${{needs.changed_files.outputs.uninstall_targets}} ${{needs.changed_files.outputs.build_targets}} build doc-html ptest"
+      targets: "${{needs.changed_files.outputs.uninstall_targets}} reconfigure ${{needs.changed_files.outputs.build_targets}} build doc-html ptest"
       # Only test systems with a usable system python (>= 3.9)
       # with only a small number of test failures as of 10.2.rc0
       tox_system_factors: >-

Makefile

@@ -50,6 +50,9 @@ SPKG_COLLECT_FILES = build/pkgs/*/type build/pkgs/*/package-version.txt build/pk
 # If configure was run before, rerun it with the old arguments.
 # Otherwise, run configure with argument $PREREQ_OPTIONS.
 build/make/Makefile: configure $(SPKG_COLLECT_FILES) $(CONFIG_FILES:%=%.in)
+	$(MAKE) reconfigure
+
+reconfigure:
 	rm -f config.log
 	mkdir -p logs/pkgs
 	ln -s logs/pkgs/config.log config.log
@@ -339,7 +342,7 @@ list:
 	@$(MAKE) --silent build/make/Makefile >&2
 	@$(MAKE) --silent -f build/make/Makefile SAGE_PKGCONFIG=dummy $@
 
-.PHONY: default build dist install micro_release \
+.PHONY: default build dist install micro_release reconfigure \
 	misc-clean bdist-clean distclean bootstrap-clean maintainer-clean \
 	test check testoptional testall testlong testoptionallong testallong \
 	ptest ptestoptional ptestall ptestlong ptestoptionallong ptestallong \

m4/sage_spkg_collect.m4

@@ -434,7 +434,7 @@ $COMMAND
 
     hint: After installation, re-run configure using:
 
-      \$ ./config.status --recheck && ./config.status
+      \$ make reconfigure
                 ])
             ], [
                 AC_MSG_NOTICE([No equivalent system packages for $SYSTEM are known to Sage])

src/doc/en/developer/portability_testing.rst

@@ -230,7 +230,7 @@ following::
   configure: hint: installing the following system packages is recommended and may avoid building some of the above SPKGs from source:
   configure:   $ sudo apt-get install libflint-arb-dev ... libzmq3-dev libz-dev
   configure: After installation, re-run configure using:
-  configure:   $ ./config.status --recheck && ./config.status
+  configure:   $ make reconfigure
 
 This information comes from Sage's database of equivalent distribution
 packages.  For example::