coreutils may not build because misssing aclocal-1.15

[chelmuth]

After a fresh prepared coreutils port make -C build/x86_64 noux-pkg/coreutils-minimal and ./tool/depot/create genodelabs/bin/x86_64/coreutils-minimal UPDATE_VERSIONS=1 FORCE=1 may fail like follows.

/home/krishna/src/genode.git/contrib/coreutils-0c59a98223ebc29b87276ea0bfcfa8892798cf32/src/noux-pkg/coreutils/build-aux/missing: line 81: aclocal-1.15: command not found
WARNING: 'aclocal-1.15' is missing on your system.
         You should only need it if you modified 'acinclude.m4' or
         'configure.ac' or m4 files included by 'configure.ac'.

make -d revealed that timestamps in the port force the rebuild of aclocal macros.

        Prerequisite '/home/krishna/src/genode.git/contrib/coreutils-0c59a98223ebc29b87276ea0bfcfa8892798cf32/src/noux-pkg/coreutils/m4/cu-progs.m4' is newer than target '/home/krishna/src/genode.git/contrib/coreutils-0c59a98223ebc29b87276ea0bfcfa8892798cf32/src/noux-pkg/coreutils/aclocal.m4'.

This issue is related to #4350 and stems from #4262.

[chelmuth]

touch /home/krishna/src/genode.git/contrib/coreutils-0c59a98223ebc29b87276ea0bfcfa8892798cf32/src/noux-pkg/coreutils/aclocal.m4 makes the pkg build again.

Due to the randomness in timestamps touching a single file does not always help to "fix" the dependency chain in our interest. Temporarily reverting e6cdaaf helps to proceed with unrelated developments.

[nfeske]

I wonder, might there be a solution in the lines of 4f820cf? I'm unfortunately not well-versed in the autoconf magic, but maybe there exists an equally simple way of discharging the automatism behind the invocation of the aclocal tool?

[nfeske]

The rule in coreutils's Makefile.in at line 6025 looks like a promising candidate:

$(ACLOCAL_M4):  $(am__aclocal_m4_deps)
	$(am__cd) $(srcdir) && $(ACLOCAL) $(ACLOCAL_AMFLAGS)

Could you check if prefixing this line with IGNORE- has the desired effect? If so, we should extend the _discharge_automake command in tool/ports/mk/install.mk by covering this case.

[chelmuth]

Thanks for the exact pointer. Commit 952ba29 fixes the issue (tested with coreutils and tar).