[FIX] grep: skip its host-vetting bootstrap; util-linux: lib64 again

grep is the only package here that INSPECTS the version of the m4
macros its build host provides, and refuses to proceed:

  ./bootstrap: do not use pkg.m4 serial 12

That is not an s390x incompatibility -- the same refusal happens on any
Ubuntu host, x86 included. The release tarball is already bootstrapped,
so re-running ./bootstrap regenerates what is already there and
skipping it costs nothing.

util-linux hits the lib64-versus-lib divergence already handled in
gcc.sh. Here it surfaces as

  rm: cannot remove '.../usr/lib/lib*.la': No such file or directory

a glob that matched nothing, which rm reports as a missing file rather
than an empty expansion -- so the error names a path that was never
going to exist. Same remedy: merge the trees before package() touches
anything, leaving the upstream paths working unchanged.

That divergence has now appeared twice. If a third package hits it, it
belongs in the shared bootstrap rather than in per-package hooks.

--- FR ---

grep est le seul paquet ici a EXAMINER la version des macros m4 que lui
fournit son hote, et a refuser de poursuivre :

  ./bootstrap: do not use pkg.m4 serial 12

Ce n est pas une incompatibilite s390x -- le meme refus survient sur
n importe quel hote Ubuntu, x86 compris. L archive de version est deja
amorcee, donc relancer ./bootstrap regenere ce qui existe deja et le
sauter ne coute rien.

util-linux rencontre la divergence lib64 contre lib deja traitee dans
gcc.sh. Elle apparait ici sous la forme

  rm: cannot remove '.../usr/lib/lib*.la': No such file or directory

un motif qui ne correspond a rien, que rm signale comme un fichier
manquant plutot que comme une expansion vide -- l erreur nomme donc un
chemin qui n allait jamais exister. Meme remede : fusionner les arbres
avant que package() ne touche a quoi que ce soit.

Cette divergence est apparue deux fois. Si un troisieme paquet la
rencontre, sa place est dans l amorcage partage et non dans des
crochets par paquet.

Assisted-by: Claude Opus 5

patches/pkgbuild/grep.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+# grep: skip ./bootstrap, which vets its host's autotools macros.
+#
+#   ./bootstrap: do not use pkg.m4 serial 12;
+#   see https://lists.gnu.org/r/grep-devel/2025-04/msg00006.html
+#
+# grep is the only package in this list that INSPECTS the version of the m4
+# macros its build host provides, and refuses to proceed on the serial Ubuntu
+# ships. It is not detecting a real incompatibility on s390x -- the same
+# refusal happens on any Ubuntu host, x86 included.
+#
+# The release tarball is already bootstrapped: configure, Makefile.in and the
+# gnulib tree are present. Re-running ./bootstrap regenerates what is already
+# there, so skipping it costs nothing.
+set -euo pipefail
+sed -i 's|^\(\s*\)\./bootstrap|\1# bootstrap skipped by the port: see patches/pkgbuild/grep.sh\n\1true|' PKGBUILD
+grep -qE '^\s*\./bootstrap' PKGBUILD && { echo "grep: bootstrap still invoked" >&2; exit 1; }
+echo "grep: ./bootstrap skipped (it rejects the host pkg.m4 serial)"

patches/pkgbuild/util-linux.sh

@@ -0,0 +1,34 @@
+#!/usr/bin/env bash
+# util-linux: s390x installs to lib64, Arch expects lib.
+#
+#   rm: cannot remove '.../pkg/util-linux/usr/lib/lib*.la': No such file
+#
+# The same divergence already handled in gcc.sh: 64-bit Z installs libraries
+# into usr/lib64, while every Arch PKGBUILD names usr/lib. Here it shows up
+# as a glob that matches nothing, which `rm` reports as a missing file rather
+# than an empty expansion -- so the error names a path that was never going
+# to exist.
+#
+# Merged before package() touches anything, so the upstream paths keep
+# working unchanged.
+set -euo pipefail
+python3 - <<'PY'
+import io, re
+s = io.open("PKGBUILD", encoding="utf-8").read()
+merge = """  # s390x installs 64-bit libraries to lib64; Arch expects lib.
+  if [ -d "$pkgdir/usr/lib64" ]; then
+    mkdir -p "$pkgdir/usr/lib"
+    cp -a "$pkgdir/usr/lib64/." "$pkgdir/usr/lib/"
+    rm -rf "$pkgdir/usr/lib64"
+  fi
+"""
+m = re.search(r"\npackage_util-linux\(\) \{\n", s)
+if not m:
+    m = re.search(r"\npackage\(\) \{\n", s)
+assert m, "package function not found"
+s = s[:m.end()] + merge + s[m.end():]
+io.open("PKGBUILD", "w", encoding="utf-8").write(s)
+PY
+grep -q 'installs 64-bit libraries to lib64' PKGBUILD || {
+    echo "util-linux: lib64 merge not inserted" >&2; exit 1; }
+echo "util-linux: lib64 merged into lib before packaging"